1a828cd18SDaniel Bristot de Oliveira // SPDX-License-Identifier: GPL-2.0
2a828cd18SDaniel Bristot de Oliveira /*
3a828cd18SDaniel Bristot de Oliveira * Copyright (C) 2021 Red Hat Inc, Daniel Bristot de Oliveira <bristot@kernel.org>
4a828cd18SDaniel Bristot de Oliveira */
5a828cd18SDaniel Bristot de Oliveira
6272ced25SDaniel Bristot de Oliveira #define _GNU_SOURCE
7a828cd18SDaniel Bristot de Oliveira #include <getopt.h>
8a828cd18SDaniel Bristot de Oliveira #include <stdlib.h>
9a828cd18SDaniel Bristot de Oliveira #include <string.h>
10a828cd18SDaniel Bristot de Oliveira #include <signal.h>
11a828cd18SDaniel Bristot de Oliveira #include <unistd.h>
12a828cd18SDaniel Bristot de Oliveira #include <stdio.h>
13a828cd18SDaniel Bristot de Oliveira #include <time.h>
145def33dfSDaniel Bristot de Oliveira #include <errno.h>
15272ced25SDaniel Bristot de Oliveira #include <sched.h>
16cdca4f4eSDaniel Bristot de Oliveira #include <pthread.h>
17a828cd18SDaniel Bristot de Oliveira
18a828cd18SDaniel Bristot de Oliveira #include "utils.h"
19a828cd18SDaniel Bristot de Oliveira #include "osnoise.h"
20a828cd18SDaniel Bristot de Oliveira #include "timerlat.h"
215def33dfSDaniel Bristot de Oliveira #include "timerlat_aa.h"
22cdca4f4eSDaniel Bristot de Oliveira #include "timerlat_u.h"
23a828cd18SDaniel Bristot de Oliveira
24a828cd18SDaniel Bristot de Oliveira struct timerlat_top_params {
25a828cd18SDaniel Bristot de Oliveira char *cpus;
26894c29c7SDaniel Bristot de Oliveira cpu_set_t monitored_cpus;
27a828cd18SDaniel Bristot de Oliveira char *trace_output;
28a957cbc0SDaniel Bristot de Oliveira char *cgroup_name;
29a828cd18SDaniel Bristot de Oliveira unsigned long long runtime;
30a828cd18SDaniel Bristot de Oliveira long long stop_us;
31a828cd18SDaniel Bristot de Oliveira long long stop_total_us;
32a828cd18SDaniel Bristot de Oliveira long long timerlat_period_us;
33a828cd18SDaniel Bristot de Oliveira long long print_stack;
34a828cd18SDaniel Bristot de Oliveira int sleep_time;
35a828cd18SDaniel Bristot de Oliveira int output_divisor;
36a828cd18SDaniel Bristot de Oliveira int duration;
37a828cd18SDaniel Bristot de Oliveira int quiet;
38a828cd18SDaniel Bristot de Oliveira int set_sched;
397d0dc957SDaniel Bristot de Oliveira int dma_latency;
405def33dfSDaniel Bristot de Oliveira int no_aa;
419fa48a24SDaniel Bristot de Oliveira int aa_only;
425def33dfSDaniel Bristot de Oliveira int dump_tasks;
43a957cbc0SDaniel Bristot de Oliveira int cgroup;
44272ced25SDaniel Bristot de Oliveira int hk_cpus;
45cdca4f4eSDaniel Bristot de Oliveira int user_top;
46a23c05fdSDaniel Bristot de Oliveira int user_workload;
47fb9e90a6SDaniel Bristot de Oliveira int kernel_workload;
48f5c0cdadSDaniel Bristot de Oliveira int pretty_output;
49cdbf7196SDaniel Bristot de Oliveira int warmup;
50e9a4062eSDaniel Bristot de Oliveira int buffer_size;
51272ced25SDaniel Bristot de Oliveira cpu_set_t hk_cpu_set;
52a828cd18SDaniel Bristot de Oliveira struct sched_attr sched_param;
5351d64c3aSDaniel Bristot de Oliveira struct trace_events *events;
54a828cd18SDaniel Bristot de Oliveira };
55a828cd18SDaniel Bristot de Oliveira
56a828cd18SDaniel Bristot de Oliveira struct timerlat_top_cpu {
57a828cd18SDaniel Bristot de Oliveira int irq_count;
58a828cd18SDaniel Bristot de Oliveira int thread_count;
59cdca4f4eSDaniel Bristot de Oliveira int user_count;
60a828cd18SDaniel Bristot de Oliveira
61a828cd18SDaniel Bristot de Oliveira unsigned long long cur_irq;
62a828cd18SDaniel Bristot de Oliveira unsigned long long min_irq;
63a828cd18SDaniel Bristot de Oliveira unsigned long long sum_irq;
64a828cd18SDaniel Bristot de Oliveira unsigned long long max_irq;
65a828cd18SDaniel Bristot de Oliveira
66a828cd18SDaniel Bristot de Oliveira unsigned long long cur_thread;
67a828cd18SDaniel Bristot de Oliveira unsigned long long min_thread;
68a828cd18SDaniel Bristot de Oliveira unsigned long long sum_thread;
69a828cd18SDaniel Bristot de Oliveira unsigned long long max_thread;
70cdca4f4eSDaniel Bristot de Oliveira
71cdca4f4eSDaniel Bristot de Oliveira unsigned long long cur_user;
72cdca4f4eSDaniel Bristot de Oliveira unsigned long long min_user;
73cdca4f4eSDaniel Bristot de Oliveira unsigned long long sum_user;
74cdca4f4eSDaniel Bristot de Oliveira unsigned long long max_user;
75a828cd18SDaniel Bristot de Oliveira };
76a828cd18SDaniel Bristot de Oliveira
77a828cd18SDaniel Bristot de Oliveira struct timerlat_top_data {
78a828cd18SDaniel Bristot de Oliveira struct timerlat_top_cpu *cpu_data;
79a828cd18SDaniel Bristot de Oliveira int nr_cpus;
80a828cd18SDaniel Bristot de Oliveira };
81a828cd18SDaniel Bristot de Oliveira
82a828cd18SDaniel Bristot de Oliveira /*
83a828cd18SDaniel Bristot de Oliveira * timerlat_free_top - free runtime data
84a828cd18SDaniel Bristot de Oliveira */
85a828cd18SDaniel Bristot de Oliveira static void
timerlat_free_top(struct timerlat_top_data * data)86a828cd18SDaniel Bristot de Oliveira timerlat_free_top(struct timerlat_top_data *data)
87a828cd18SDaniel Bristot de Oliveira {
88a828cd18SDaniel Bristot de Oliveira free(data->cpu_data);
89a828cd18SDaniel Bristot de Oliveira free(data);
90a828cd18SDaniel Bristot de Oliveira }
91a828cd18SDaniel Bristot de Oliveira
92a828cd18SDaniel Bristot de Oliveira /*
93a828cd18SDaniel Bristot de Oliveira * timerlat_alloc_histogram - alloc runtime data
94a828cd18SDaniel Bristot de Oliveira */
timerlat_alloc_top(int nr_cpus)95a828cd18SDaniel Bristot de Oliveira static struct timerlat_top_data *timerlat_alloc_top(int nr_cpus)
96a828cd18SDaniel Bristot de Oliveira {
97a828cd18SDaniel Bristot de Oliveira struct timerlat_top_data *data;
98a828cd18SDaniel Bristot de Oliveira int cpu;
99a828cd18SDaniel Bristot de Oliveira
100a828cd18SDaniel Bristot de Oliveira data = calloc(1, sizeof(*data));
101a828cd18SDaniel Bristot de Oliveira if (!data)
102a828cd18SDaniel Bristot de Oliveira return NULL;
103a828cd18SDaniel Bristot de Oliveira
104a828cd18SDaniel Bristot de Oliveira data->nr_cpus = nr_cpus;
105a828cd18SDaniel Bristot de Oliveira
106a828cd18SDaniel Bristot de Oliveira /* one set of histograms per CPU */
107a828cd18SDaniel Bristot de Oliveira data->cpu_data = calloc(1, sizeof(*data->cpu_data) * nr_cpus);
108a828cd18SDaniel Bristot de Oliveira if (!data->cpu_data)
109a828cd18SDaniel Bristot de Oliveira goto cleanup;
110a828cd18SDaniel Bristot de Oliveira
111a828cd18SDaniel Bristot de Oliveira /* set the min to max */
112a828cd18SDaniel Bristot de Oliveira for (cpu = 0; cpu < nr_cpus; cpu++) {
113a828cd18SDaniel Bristot de Oliveira data->cpu_data[cpu].min_irq = ~0;
114a828cd18SDaniel Bristot de Oliveira data->cpu_data[cpu].min_thread = ~0;
115cdca4f4eSDaniel Bristot de Oliveira data->cpu_data[cpu].min_user = ~0;
116a828cd18SDaniel Bristot de Oliveira }
117a828cd18SDaniel Bristot de Oliveira
118a828cd18SDaniel Bristot de Oliveira return data;
119a828cd18SDaniel Bristot de Oliveira
120a828cd18SDaniel Bristot de Oliveira cleanup:
121a828cd18SDaniel Bristot de Oliveira timerlat_free_top(data);
122a828cd18SDaniel Bristot de Oliveira return NULL;
123a828cd18SDaniel Bristot de Oliveira }
124a828cd18SDaniel Bristot de Oliveira
125285dcb76SDaniel Bristot de Oliveira static void
timerlat_top_reset_sum(struct timerlat_top_cpu * summary)126285dcb76SDaniel Bristot de Oliveira timerlat_top_reset_sum(struct timerlat_top_cpu *summary)
127285dcb76SDaniel Bristot de Oliveira {
128285dcb76SDaniel Bristot de Oliveira memset(summary, 0, sizeof(*summary));
129285dcb76SDaniel Bristot de Oliveira summary->min_irq = ~0;
130285dcb76SDaniel Bristot de Oliveira summary->min_thread = ~0;
131285dcb76SDaniel Bristot de Oliveira summary->min_user = ~0;
132285dcb76SDaniel Bristot de Oliveira }
133285dcb76SDaniel Bristot de Oliveira
134285dcb76SDaniel Bristot de Oliveira static void
timerlat_top_update_sum(struct osnoise_tool * tool,int cpu,struct timerlat_top_cpu * sum)135285dcb76SDaniel Bristot de Oliveira timerlat_top_update_sum(struct osnoise_tool *tool, int cpu, struct timerlat_top_cpu *sum)
136285dcb76SDaniel Bristot de Oliveira {
137285dcb76SDaniel Bristot de Oliveira struct timerlat_top_data *data = tool->data;
138285dcb76SDaniel Bristot de Oliveira struct timerlat_top_cpu *cpu_data = &data->cpu_data[cpu];
139285dcb76SDaniel Bristot de Oliveira
140285dcb76SDaniel Bristot de Oliveira sum->irq_count += cpu_data->irq_count;
141285dcb76SDaniel Bristot de Oliveira update_min(&sum->min_irq, &cpu_data->min_irq);
142285dcb76SDaniel Bristot de Oliveira update_sum(&sum->sum_irq, &cpu_data->sum_irq);
143285dcb76SDaniel Bristot de Oliveira update_max(&sum->max_irq, &cpu_data->max_irq);
144285dcb76SDaniel Bristot de Oliveira
145285dcb76SDaniel Bristot de Oliveira sum->thread_count += cpu_data->thread_count;
146285dcb76SDaniel Bristot de Oliveira update_min(&sum->min_thread, &cpu_data->min_thread);
147285dcb76SDaniel Bristot de Oliveira update_sum(&sum->sum_thread, &cpu_data->sum_thread);
148285dcb76SDaniel Bristot de Oliveira update_max(&sum->max_thread, &cpu_data->max_thread);
149285dcb76SDaniel Bristot de Oliveira
150285dcb76SDaniel Bristot de Oliveira sum->user_count += cpu_data->user_count;
151285dcb76SDaniel Bristot de Oliveira update_min(&sum->min_user, &cpu_data->min_user);
152285dcb76SDaniel Bristot de Oliveira update_sum(&sum->sum_user, &cpu_data->sum_user);
153285dcb76SDaniel Bristot de Oliveira update_max(&sum->max_user, &cpu_data->max_user);
154285dcb76SDaniel Bristot de Oliveira }
155285dcb76SDaniel Bristot de Oliveira
156a828cd18SDaniel Bristot de Oliveira /*
157a828cd18SDaniel Bristot de Oliveira * timerlat_hist_update - record a new timerlat occurent on cpu, updating data
158a828cd18SDaniel Bristot de Oliveira */
159a828cd18SDaniel Bristot de Oliveira static void
timerlat_top_update(struct osnoise_tool * tool,int cpu,unsigned long long thread,unsigned long long latency)160a828cd18SDaniel Bristot de Oliveira timerlat_top_update(struct osnoise_tool *tool, int cpu,
161a828cd18SDaniel Bristot de Oliveira unsigned long long thread,
162a828cd18SDaniel Bristot de Oliveira unsigned long long latency)
163a828cd18SDaniel Bristot de Oliveira {
164a828cd18SDaniel Bristot de Oliveira struct timerlat_top_data *data = tool->data;
165a828cd18SDaniel Bristot de Oliveira struct timerlat_top_cpu *cpu_data = &data->cpu_data[cpu];
166a828cd18SDaniel Bristot de Oliveira
167a828cd18SDaniel Bristot de Oliveira if (!thread) {
168a828cd18SDaniel Bristot de Oliveira cpu_data->irq_count++;
169a828cd18SDaniel Bristot de Oliveira cpu_data->cur_irq = latency;
170a828cd18SDaniel Bristot de Oliveira update_min(&cpu_data->min_irq, &latency);
171a828cd18SDaniel Bristot de Oliveira update_sum(&cpu_data->sum_irq, &latency);
172a828cd18SDaniel Bristot de Oliveira update_max(&cpu_data->max_irq, &latency);
173cdca4f4eSDaniel Bristot de Oliveira } else if (thread == 1) {
174a828cd18SDaniel Bristot de Oliveira cpu_data->thread_count++;
175a828cd18SDaniel Bristot de Oliveira cpu_data->cur_thread = latency;
176a828cd18SDaniel Bristot de Oliveira update_min(&cpu_data->min_thread, &latency);
177a828cd18SDaniel Bristot de Oliveira update_sum(&cpu_data->sum_thread, &latency);
178a828cd18SDaniel Bristot de Oliveira update_max(&cpu_data->max_thread, &latency);
179cdca4f4eSDaniel Bristot de Oliveira } else {
180cdca4f4eSDaniel Bristot de Oliveira cpu_data->user_count++;
181cdca4f4eSDaniel Bristot de Oliveira cpu_data->cur_user = latency;
182cdca4f4eSDaniel Bristot de Oliveira update_min(&cpu_data->min_user, &latency);
183cdca4f4eSDaniel Bristot de Oliveira update_sum(&cpu_data->sum_user, &latency);
184cdca4f4eSDaniel Bristot de Oliveira update_max(&cpu_data->max_user, &latency);
185a828cd18SDaniel Bristot de Oliveira }
186a828cd18SDaniel Bristot de Oliveira }
187a828cd18SDaniel Bristot de Oliveira
188a828cd18SDaniel Bristot de Oliveira /*
189a828cd18SDaniel Bristot de Oliveira * timerlat_top_handler - this is the handler for timerlat tracer events
190a828cd18SDaniel Bristot de Oliveira */
191a828cd18SDaniel Bristot de Oliveira static int
timerlat_top_handler(struct trace_seq * s,struct tep_record * record,struct tep_event * event,void * context)192a828cd18SDaniel Bristot de Oliveira timerlat_top_handler(struct trace_seq *s, struct tep_record *record,
193a828cd18SDaniel Bristot de Oliveira struct tep_event *event, void *context)
194a828cd18SDaniel Bristot de Oliveira {
195a828cd18SDaniel Bristot de Oliveira struct trace_instance *trace = context;
1965def33dfSDaniel Bristot de Oliveira struct timerlat_top_params *params;
197a828cd18SDaniel Bristot de Oliveira unsigned long long latency, thread;
198a828cd18SDaniel Bristot de Oliveira struct osnoise_tool *top;
199a828cd18SDaniel Bristot de Oliveira int cpu = record->cpu;
200a828cd18SDaniel Bristot de Oliveira
201a828cd18SDaniel Bristot de Oliveira top = container_of(trace, struct osnoise_tool, trace);
2025def33dfSDaniel Bristot de Oliveira params = top->params;
203a828cd18SDaniel Bristot de Oliveira
2049fa48a24SDaniel Bristot de Oliveira if (!params->aa_only) {
205a828cd18SDaniel Bristot de Oliveira tep_get_field_val(s, event, "context", record, &thread, 1);
206a828cd18SDaniel Bristot de Oliveira tep_get_field_val(s, event, "timer_latency", record, &latency, 1);
207a828cd18SDaniel Bristot de Oliveira
208a828cd18SDaniel Bristot de Oliveira timerlat_top_update(top, cpu, thread, latency);
2099fa48a24SDaniel Bristot de Oliveira }
210a828cd18SDaniel Bristot de Oliveira
211a828cd18SDaniel Bristot de Oliveira return 0;
212a828cd18SDaniel Bristot de Oliveira }
213a828cd18SDaniel Bristot de Oliveira
214a828cd18SDaniel Bristot de Oliveira /*
215a828cd18SDaniel Bristot de Oliveira * timerlat_top_header - print the header of the tool output
216a828cd18SDaniel Bristot de Oliveira */
timerlat_top_header(struct timerlat_top_params * params,struct osnoise_tool * top)217f5c0cdadSDaniel Bristot de Oliveira static void timerlat_top_header(struct timerlat_top_params *params, struct osnoise_tool *top)
218a828cd18SDaniel Bristot de Oliveira {
219a828cd18SDaniel Bristot de Oliveira struct trace_seq *s = top->trace.seq;
220a828cd18SDaniel Bristot de Oliveira char duration[26];
221a828cd18SDaniel Bristot de Oliveira
222a828cd18SDaniel Bristot de Oliveira get_duration(top->start_time, duration, sizeof(duration));
223a828cd18SDaniel Bristot de Oliveira
224f5c0cdadSDaniel Bristot de Oliveira if (params->pretty_output)
225a828cd18SDaniel Bristot de Oliveira trace_seq_printf(s, "\033[2;37;40m");
226f5c0cdadSDaniel Bristot de Oliveira
227a828cd18SDaniel Bristot de Oliveira trace_seq_printf(s, " Timer Latency ");
228cdca4f4eSDaniel Bristot de Oliveira if (params->user_top)
229cdca4f4eSDaniel Bristot de Oliveira trace_seq_printf(s, " ");
230f5c0cdadSDaniel Bristot de Oliveira
231f5c0cdadSDaniel Bristot de Oliveira if (params->pretty_output)
232a828cd18SDaniel Bristot de Oliveira trace_seq_printf(s, "\033[0;0;0m");
233a828cd18SDaniel Bristot de Oliveira trace_seq_printf(s, "\n");
234a828cd18SDaniel Bristot de Oliveira
235cdca4f4eSDaniel Bristot de Oliveira trace_seq_printf(s, "%-6s | IRQ Timer Latency (%s) | Thread Timer Latency (%s)", duration,
236a828cd18SDaniel Bristot de Oliveira params->output_divisor == 1 ? "ns" : "us",
237a828cd18SDaniel Bristot de Oliveira params->output_divisor == 1 ? "ns" : "us");
238a828cd18SDaniel Bristot de Oliveira
239cdca4f4eSDaniel Bristot de Oliveira if (params->user_top) {
240cdca4f4eSDaniel Bristot de Oliveira trace_seq_printf(s, " | Ret user Timer Latency (%s)",
241cdca4f4eSDaniel Bristot de Oliveira params->output_divisor == 1 ? "ns" : "us");
242cdca4f4eSDaniel Bristot de Oliveira }
243cdca4f4eSDaniel Bristot de Oliveira
244cdca4f4eSDaniel Bristot de Oliveira trace_seq_printf(s, "\n");
245f5c0cdadSDaniel Bristot de Oliveira if (params->pretty_output)
246a828cd18SDaniel Bristot de Oliveira trace_seq_printf(s, "\033[2;30;47m");
247f5c0cdadSDaniel Bristot de Oliveira
248a828cd18SDaniel Bristot de Oliveira trace_seq_printf(s, "CPU COUNT | cur min avg max | cur min avg max");
249cdca4f4eSDaniel Bristot de Oliveira if (params->user_top)
250cdca4f4eSDaniel Bristot de Oliveira trace_seq_printf(s, " | cur min avg max");
251f5c0cdadSDaniel Bristot de Oliveira
252f5c0cdadSDaniel Bristot de Oliveira if (params->pretty_output)
253a828cd18SDaniel Bristot de Oliveira trace_seq_printf(s, "\033[0;0;0m");
254a828cd18SDaniel Bristot de Oliveira trace_seq_printf(s, "\n");
255a828cd18SDaniel Bristot de Oliveira }
256a828cd18SDaniel Bristot de Oliveira
2575f076933SDaniel Bristot de Oliveira static const char *no_value = " -";
2585f076933SDaniel Bristot de Oliveira
259a828cd18SDaniel Bristot de Oliveira /*
260a828cd18SDaniel Bristot de Oliveira * timerlat_top_print - prints the output of a given CPU
261a828cd18SDaniel Bristot de Oliveira */
timerlat_top_print(struct osnoise_tool * top,int cpu)262a828cd18SDaniel Bristot de Oliveira static void timerlat_top_print(struct osnoise_tool *top, int cpu)
263a828cd18SDaniel Bristot de Oliveira {
264a828cd18SDaniel Bristot de Oliveira
265a828cd18SDaniel Bristot de Oliveira struct timerlat_top_params *params = top->params;
266a828cd18SDaniel Bristot de Oliveira struct timerlat_top_data *data = top->data;
267a828cd18SDaniel Bristot de Oliveira struct timerlat_top_cpu *cpu_data = &data->cpu_data[cpu];
268a828cd18SDaniel Bristot de Oliveira int divisor = params->output_divisor;
269a828cd18SDaniel Bristot de Oliveira struct trace_seq *s = top->trace.seq;
270a828cd18SDaniel Bristot de Oliveira
271a828cd18SDaniel Bristot de Oliveira if (divisor == 0)
272a828cd18SDaniel Bristot de Oliveira return;
273a828cd18SDaniel Bristot de Oliveira
274a828cd18SDaniel Bristot de Oliveira /*
275a828cd18SDaniel Bristot de Oliveira * Skip if no data is available: is this cpu offline?
276a828cd18SDaniel Bristot de Oliveira */
277a828cd18SDaniel Bristot de Oliveira if (!cpu_data->irq_count && !cpu_data->thread_count)
278a828cd18SDaniel Bristot de Oliveira return;
279a828cd18SDaniel Bristot de Oliveira
280a828cd18SDaniel Bristot de Oliveira /*
281a828cd18SDaniel Bristot de Oliveira * Unless trace is being lost, IRQ counter is always the max.
282a828cd18SDaniel Bristot de Oliveira */
283a828cd18SDaniel Bristot de Oliveira trace_seq_printf(s, "%3d #%-9d |", cpu, cpu_data->irq_count);
284a828cd18SDaniel Bristot de Oliveira
285a828cd18SDaniel Bristot de Oliveira if (!cpu_data->irq_count) {
2865f076933SDaniel Bristot de Oliveira trace_seq_printf(s, "%s %s %s %s |", no_value, no_value, no_value, no_value);
287a828cd18SDaniel Bristot de Oliveira } else {
288a828cd18SDaniel Bristot de Oliveira trace_seq_printf(s, "%9llu ", cpu_data->cur_irq / params->output_divisor);
289a828cd18SDaniel Bristot de Oliveira trace_seq_printf(s, "%9llu ", cpu_data->min_irq / params->output_divisor);
290a828cd18SDaniel Bristot de Oliveira trace_seq_printf(s, "%9llu ", (cpu_data->sum_irq / cpu_data->irq_count) / divisor);
291a828cd18SDaniel Bristot de Oliveira trace_seq_printf(s, "%9llu |", cpu_data->max_irq / divisor);
292a828cd18SDaniel Bristot de Oliveira }
293a828cd18SDaniel Bristot de Oliveira
294a828cd18SDaniel Bristot de Oliveira if (!cpu_data->thread_count) {
2955f076933SDaniel Bristot de Oliveira trace_seq_printf(s, "%s %s %s %s", no_value, no_value, no_value, no_value);
296a828cd18SDaniel Bristot de Oliveira } else {
297a828cd18SDaniel Bristot de Oliveira trace_seq_printf(s, "%9llu ", cpu_data->cur_thread / divisor);
298a828cd18SDaniel Bristot de Oliveira trace_seq_printf(s, "%9llu ", cpu_data->min_thread / divisor);
299a828cd18SDaniel Bristot de Oliveira trace_seq_printf(s, "%9llu ",
300a828cd18SDaniel Bristot de Oliveira (cpu_data->sum_thread / cpu_data->thread_count) / divisor);
301cdca4f4eSDaniel Bristot de Oliveira trace_seq_printf(s, "%9llu", cpu_data->max_thread / divisor);
302cdca4f4eSDaniel Bristot de Oliveira }
303cdca4f4eSDaniel Bristot de Oliveira
304cdca4f4eSDaniel Bristot de Oliveira if (!params->user_top) {
305cdca4f4eSDaniel Bristot de Oliveira trace_seq_printf(s, "\n");
306cdca4f4eSDaniel Bristot de Oliveira return;
307cdca4f4eSDaniel Bristot de Oliveira }
308cdca4f4eSDaniel Bristot de Oliveira
309cdca4f4eSDaniel Bristot de Oliveira trace_seq_printf(s, " |");
310cdca4f4eSDaniel Bristot de Oliveira
311cdca4f4eSDaniel Bristot de Oliveira if (!cpu_data->user_count) {
3125f076933SDaniel Bristot de Oliveira trace_seq_printf(s, "%s %s %s %s\n", no_value, no_value, no_value, no_value);
313cdca4f4eSDaniel Bristot de Oliveira } else {
314cdca4f4eSDaniel Bristot de Oliveira trace_seq_printf(s, "%9llu ", cpu_data->cur_user / divisor);
315cdca4f4eSDaniel Bristot de Oliveira trace_seq_printf(s, "%9llu ", cpu_data->min_user / divisor);
316cdca4f4eSDaniel Bristot de Oliveira trace_seq_printf(s, "%9llu ",
317cdca4f4eSDaniel Bristot de Oliveira (cpu_data->sum_user / cpu_data->user_count) / divisor);
318cdca4f4eSDaniel Bristot de Oliveira trace_seq_printf(s, "%9llu\n", cpu_data->max_user / divisor);
319a828cd18SDaniel Bristot de Oliveira }
320a828cd18SDaniel Bristot de Oliveira }
321a828cd18SDaniel Bristot de Oliveira
322a828cd18SDaniel Bristot de Oliveira /*
323285dcb76SDaniel Bristot de Oliveira * timerlat_top_print_sum - prints the summary output
324285dcb76SDaniel Bristot de Oliveira */
325285dcb76SDaniel Bristot de Oliveira static void
timerlat_top_print_sum(struct osnoise_tool * top,struct timerlat_top_cpu * summary)326285dcb76SDaniel Bristot de Oliveira timerlat_top_print_sum(struct osnoise_tool *top, struct timerlat_top_cpu *summary)
327285dcb76SDaniel Bristot de Oliveira {
328285dcb76SDaniel Bristot de Oliveira const char *split = "----------------------------------------";
329285dcb76SDaniel Bristot de Oliveira struct timerlat_top_params *params = top->params;
330285dcb76SDaniel Bristot de Oliveira unsigned long long count = summary->irq_count;
331285dcb76SDaniel Bristot de Oliveira int divisor = params->output_divisor;
332285dcb76SDaniel Bristot de Oliveira struct trace_seq *s = top->trace.seq;
333285dcb76SDaniel Bristot de Oliveira int e = 0;
334285dcb76SDaniel Bristot de Oliveira
335285dcb76SDaniel Bristot de Oliveira if (divisor == 0)
336285dcb76SDaniel Bristot de Oliveira return;
337285dcb76SDaniel Bristot de Oliveira
338285dcb76SDaniel Bristot de Oliveira /*
339285dcb76SDaniel Bristot de Oliveira * Skip if no data is available: is this cpu offline?
340285dcb76SDaniel Bristot de Oliveira */
341285dcb76SDaniel Bristot de Oliveira if (!summary->irq_count && !summary->thread_count)
342285dcb76SDaniel Bristot de Oliveira return;
343285dcb76SDaniel Bristot de Oliveira
344285dcb76SDaniel Bristot de Oliveira while (count > 999999) {
345285dcb76SDaniel Bristot de Oliveira e++;
346285dcb76SDaniel Bristot de Oliveira count /= 10;
347285dcb76SDaniel Bristot de Oliveira }
348285dcb76SDaniel Bristot de Oliveira
349285dcb76SDaniel Bristot de Oliveira trace_seq_printf(s, "%.*s|%.*s|%.*s", 15, split, 40, split, 39, split);
350285dcb76SDaniel Bristot de Oliveira if (params->user_top)
351285dcb76SDaniel Bristot de Oliveira trace_seq_printf(s, "-|%.*s", 39, split);
352285dcb76SDaniel Bristot de Oliveira trace_seq_printf(s, "\n");
353285dcb76SDaniel Bristot de Oliveira
354285dcb76SDaniel Bristot de Oliveira trace_seq_printf(s, "ALL #%-6llu e%d |", count, e);
355285dcb76SDaniel Bristot de Oliveira
356285dcb76SDaniel Bristot de Oliveira if (!summary->irq_count) {
357285dcb76SDaniel Bristot de Oliveira trace_seq_printf(s, " %s %s %s |", no_value, no_value, no_value);
358285dcb76SDaniel Bristot de Oliveira } else {
359285dcb76SDaniel Bristot de Oliveira trace_seq_printf(s, " ");
360285dcb76SDaniel Bristot de Oliveira trace_seq_printf(s, "%9llu ", summary->min_irq / params->output_divisor);
361285dcb76SDaniel Bristot de Oliveira trace_seq_printf(s, "%9llu ", (summary->sum_irq / summary->irq_count) / divisor);
362285dcb76SDaniel Bristot de Oliveira trace_seq_printf(s, "%9llu |", summary->max_irq / divisor);
363285dcb76SDaniel Bristot de Oliveira }
364285dcb76SDaniel Bristot de Oliveira
365285dcb76SDaniel Bristot de Oliveira if (!summary->thread_count) {
366285dcb76SDaniel Bristot de Oliveira trace_seq_printf(s, "%s %s %s %s", no_value, no_value, no_value, no_value);
367285dcb76SDaniel Bristot de Oliveira } else {
368285dcb76SDaniel Bristot de Oliveira trace_seq_printf(s, " ");
369285dcb76SDaniel Bristot de Oliveira trace_seq_printf(s, "%9llu ", summary->min_thread / divisor);
370285dcb76SDaniel Bristot de Oliveira trace_seq_printf(s, "%9llu ",
371285dcb76SDaniel Bristot de Oliveira (summary->sum_thread / summary->thread_count) / divisor);
372285dcb76SDaniel Bristot de Oliveira trace_seq_printf(s, "%9llu", summary->max_thread / divisor);
373285dcb76SDaniel Bristot de Oliveira }
374285dcb76SDaniel Bristot de Oliveira
375285dcb76SDaniel Bristot de Oliveira if (!params->user_top) {
376285dcb76SDaniel Bristot de Oliveira trace_seq_printf(s, "\n");
377285dcb76SDaniel Bristot de Oliveira return;
378285dcb76SDaniel Bristot de Oliveira }
379285dcb76SDaniel Bristot de Oliveira
380285dcb76SDaniel Bristot de Oliveira trace_seq_printf(s, " |");
381285dcb76SDaniel Bristot de Oliveira
382285dcb76SDaniel Bristot de Oliveira if (!summary->user_count) {
383285dcb76SDaniel Bristot de Oliveira trace_seq_printf(s, " %s %s %s |", no_value, no_value, no_value);
384285dcb76SDaniel Bristot de Oliveira } else {
385285dcb76SDaniel Bristot de Oliveira trace_seq_printf(s, " ");
386285dcb76SDaniel Bristot de Oliveira trace_seq_printf(s, "%9llu ", summary->min_user / divisor);
387285dcb76SDaniel Bristot de Oliveira trace_seq_printf(s, "%9llu ",
388285dcb76SDaniel Bristot de Oliveira (summary->sum_user / summary->user_count) / divisor);
389285dcb76SDaniel Bristot de Oliveira trace_seq_printf(s, "%9llu\n", summary->max_user / divisor);
390285dcb76SDaniel Bristot de Oliveira }
391285dcb76SDaniel Bristot de Oliveira }
392285dcb76SDaniel Bristot de Oliveira
393285dcb76SDaniel Bristot de Oliveira /*
394a828cd18SDaniel Bristot de Oliveira * clear_terminal - clears the output terminal
395a828cd18SDaniel Bristot de Oliveira */
clear_terminal(struct trace_seq * seq)396a828cd18SDaniel Bristot de Oliveira static void clear_terminal(struct trace_seq *seq)
397a828cd18SDaniel Bristot de Oliveira {
398a828cd18SDaniel Bristot de Oliveira if (!config_debug)
399a828cd18SDaniel Bristot de Oliveira trace_seq_printf(seq, "\033c");
400a828cd18SDaniel Bristot de Oliveira }
401a828cd18SDaniel Bristot de Oliveira
402a828cd18SDaniel Bristot de Oliveira /*
403a828cd18SDaniel Bristot de Oliveira * timerlat_print_stats - print data for all cpus
404a828cd18SDaniel Bristot de Oliveira */
405a828cd18SDaniel Bristot de Oliveira static void
timerlat_print_stats(struct timerlat_top_params * params,struct osnoise_tool * top)406a828cd18SDaniel Bristot de Oliveira timerlat_print_stats(struct timerlat_top_params *params, struct osnoise_tool *top)
407a828cd18SDaniel Bristot de Oliveira {
408a828cd18SDaniel Bristot de Oliveira struct trace_instance *trace = &top->trace;
409285dcb76SDaniel Bristot de Oliveira struct timerlat_top_cpu summary;
410a828cd18SDaniel Bristot de Oliveira static int nr_cpus = -1;
411a828cd18SDaniel Bristot de Oliveira int i;
412a828cd18SDaniel Bristot de Oliveira
4139fa48a24SDaniel Bristot de Oliveira if (params->aa_only)
4149fa48a24SDaniel Bristot de Oliveira return;
4159fa48a24SDaniel Bristot de Oliveira
416a828cd18SDaniel Bristot de Oliveira if (nr_cpus == -1)
417a828cd18SDaniel Bristot de Oliveira nr_cpus = sysconf(_SC_NPROCESSORS_CONF);
418a828cd18SDaniel Bristot de Oliveira
419a828cd18SDaniel Bristot de Oliveira if (!params->quiet)
420a828cd18SDaniel Bristot de Oliveira clear_terminal(trace->seq);
421a828cd18SDaniel Bristot de Oliveira
422285dcb76SDaniel Bristot de Oliveira timerlat_top_reset_sum(&summary);
423285dcb76SDaniel Bristot de Oliveira
424f5c0cdadSDaniel Bristot de Oliveira timerlat_top_header(params, top);
425a828cd18SDaniel Bristot de Oliveira
426a828cd18SDaniel Bristot de Oliveira for (i = 0; i < nr_cpus; i++) {
427894c29c7SDaniel Bristot de Oliveira if (params->cpus && !CPU_ISSET(i, ¶ms->monitored_cpus))
428a828cd18SDaniel Bristot de Oliveira continue;
429a828cd18SDaniel Bristot de Oliveira timerlat_top_print(top, i);
430285dcb76SDaniel Bristot de Oliveira timerlat_top_update_sum(top, i, &summary);
431a828cd18SDaniel Bristot de Oliveira }
432a828cd18SDaniel Bristot de Oliveira
433285dcb76SDaniel Bristot de Oliveira timerlat_top_print_sum(top, &summary);
434285dcb76SDaniel Bristot de Oliveira
435a828cd18SDaniel Bristot de Oliveira trace_seq_do_printf(trace->seq);
436a828cd18SDaniel Bristot de Oliveira trace_seq_reset(trace->seq);
437a828cd18SDaniel Bristot de Oliveira }
438a828cd18SDaniel Bristot de Oliveira
439a828cd18SDaniel Bristot de Oliveira /*
440a828cd18SDaniel Bristot de Oliveira * timerlat_top_usage - prints timerlat top usage message
441a828cd18SDaniel Bristot de Oliveira */
timerlat_top_usage(char * usage)442a828cd18SDaniel Bristot de Oliveira static void timerlat_top_usage(char *usage)
443a828cd18SDaniel Bristot de Oliveira {
444a828cd18SDaniel Bristot de Oliveira int i;
445a828cd18SDaniel Bristot de Oliveira
446a828cd18SDaniel Bristot de Oliveira static const char *const msg[] = {
447a828cd18SDaniel Bristot de Oliveira "",
448173a3b01SDaniel Bristot de Oliveira " usage: rtla timerlat [top] [-h] [-q] [-a us] [-d s] [-D] [-n] [-p us] [-i us] [-T us] [-s us] \\",
449*842fc5b8SJohn Kacur " [[-t[file]] [-e sys[:event]] [--filter <filter>] [--trigger <trigger>] [-c cpu-list] [-H cpu-list]\\",
450fb9e90a6SDaniel Bristot de Oliveira " [-P priority] [--dma-latency us] [--aa-only us] [-C[=cgroup_name]] [-u|-k] [--warm-up s]",
451a828cd18SDaniel Bristot de Oliveira "",
452a828cd18SDaniel Bristot de Oliveira " -h/--help: print this menu",
453173a3b01SDaniel Bristot de Oliveira " -a/--auto: set automatic trace mode, stopping the session if argument in us latency is hit",
4549fa48a24SDaniel Bristot de Oliveira " --aa-only us: stop if <us> latency is hit, only printing the auto analysis (reduces CPU usage)",
455a828cd18SDaniel Bristot de Oliveira " -p/--period us: timerlat period in us",
456a828cd18SDaniel Bristot de Oliveira " -i/--irq us: stop trace if the irq latency is higher than the argument in us",
457a828cd18SDaniel Bristot de Oliveira " -T/--thread us: stop trace if the thread latency is higher than the argument in us",
458a828cd18SDaniel Bristot de Oliveira " -s/--stack us: save the stack trace at the IRQ if a thread latency is higher than the argument in us",
459a828cd18SDaniel Bristot de Oliveira " -c/--cpus cpus: run the tracer only on the given cpus",
460272ced25SDaniel Bristot de Oliveira " -H/--house-keeping cpus: run rtla control threads only on the given cpus",
461a957cbc0SDaniel Bristot de Oliveira " -C/--cgroup[=cgroup_name]: set cgroup, if no cgroup_name is passed, the rtla's cgroup will be inherited",
462a828cd18SDaniel Bristot de Oliveira " -d/--duration time[m|h|d]: duration of the session in seconds",
463a828cd18SDaniel Bristot de Oliveira " -D/--debug: print debug info",
4645def33dfSDaniel Bristot de Oliveira " --dump-tasks: prints the task running on all CPUs if stop conditions are met (depends on !--no-aa)",
465*842fc5b8SJohn Kacur " -t/--trace[file]: save the stopped trace to [file|timerlat_trace.txt]",
46651d64c3aSDaniel Bristot de Oliveira " -e/--event <sys:event>: enable the <sys:event> in the trace instance, multiple -e are allowed",
46744f3a37dSDaniel Bristot de Oliveira " --filter <command>: enable a trace event filter to the previous -e event",
4681a754893SDaniel Bristot de Oliveira " --trigger <command>: enable a trace event trigger to the previous -e event",
469a828cd18SDaniel Bristot de Oliveira " -n/--nano: display data in nanoseconds",
4705def33dfSDaniel Bristot de Oliveira " --no-aa: disable auto-analysis, reducing rtla timerlat cpu usage",
471a828cd18SDaniel Bristot de Oliveira " -q/--quiet print only a summary at the end",
4727d0dc957SDaniel Bristot de Oliveira " --dma-latency us: set /dev/cpu_dma_latency latency <us> to reduce exit from idle latency",
473a828cd18SDaniel Bristot de Oliveira " -P/--priority o:prio|r:prio|f:prio|d:runtime:period : set scheduling parameters",
474a828cd18SDaniel Bristot de Oliveira " o:prio - use SCHED_OTHER with prio",
475a828cd18SDaniel Bristot de Oliveira " r:prio - use SCHED_RR with prio",
476a828cd18SDaniel Bristot de Oliveira " f:prio - use SCHED_FIFO with prio",
477a828cd18SDaniel Bristot de Oliveira " d:runtime[us|ms|s]:period[us|ms|s] - use SCHED_DEADLINE with runtime and period",
478a828cd18SDaniel Bristot de Oliveira " in nanoseconds",
479fb9e90a6SDaniel Bristot de Oliveira " -u/--user-threads: use rtla user-space threads instead of kernel-space timerlat threads",
480fb9e90a6SDaniel Bristot de Oliveira " -k/--kernel-threads: use timerlat kernel-space threads instead of rtla user-space threads",
481a23c05fdSDaniel Bristot de Oliveira " -U/--user-load: enable timerlat for user-defined user-space workload",
482cdbf7196SDaniel Bristot de Oliveira " --warm-up s: let the workload run for s seconds before collecting data",
483e9a4062eSDaniel Bristot de Oliveira " --trace-buffer-size kB: set the per-cpu trace buffer size in kB",
484a828cd18SDaniel Bristot de Oliveira NULL,
485a828cd18SDaniel Bristot de Oliveira };
486a828cd18SDaniel Bristot de Oliveira
487a828cd18SDaniel Bristot de Oliveira if (usage)
488a828cd18SDaniel Bristot de Oliveira fprintf(stderr, "%s\n", usage);
489a828cd18SDaniel Bristot de Oliveira
490a828cd18SDaniel Bristot de Oliveira fprintf(stderr, "rtla timerlat top: a per-cpu summary of the timer latency (version %s)\n",
491a828cd18SDaniel Bristot de Oliveira VERSION);
492a828cd18SDaniel Bristot de Oliveira
493a828cd18SDaniel Bristot de Oliveira for (i = 0; msg[i]; i++)
494a828cd18SDaniel Bristot de Oliveira fprintf(stderr, "%s\n", msg[i]);
495b5f31936SJohn Kacur
496b5f31936SJohn Kacur if (usage)
497b5f31936SJohn Kacur exit(EXIT_FAILURE);
498b5f31936SJohn Kacur
499b5f31936SJohn Kacur exit(EXIT_SUCCESS);
500a828cd18SDaniel Bristot de Oliveira }
501a828cd18SDaniel Bristot de Oliveira
502a828cd18SDaniel Bristot de Oliveira /*
503a828cd18SDaniel Bristot de Oliveira * timerlat_top_parse_args - allocs, parse and fill the cmd line parameters
504a828cd18SDaniel Bristot de Oliveira */
505a828cd18SDaniel Bristot de Oliveira static struct timerlat_top_params
timerlat_top_parse_args(int argc,char ** argv)506a828cd18SDaniel Bristot de Oliveira *timerlat_top_parse_args(int argc, char **argv)
507a828cd18SDaniel Bristot de Oliveira {
508a828cd18SDaniel Bristot de Oliveira struct timerlat_top_params *params;
50951d64c3aSDaniel Bristot de Oliveira struct trace_events *tevent;
510173a3b01SDaniel Bristot de Oliveira long long auto_thresh;
511a828cd18SDaniel Bristot de Oliveira int retval;
512a828cd18SDaniel Bristot de Oliveira int c;
513a828cd18SDaniel Bristot de Oliveira
514a828cd18SDaniel Bristot de Oliveira params = calloc(1, sizeof(*params));
515a828cd18SDaniel Bristot de Oliveira if (!params)
516a828cd18SDaniel Bristot de Oliveira exit(1);
517a828cd18SDaniel Bristot de Oliveira
5187d0dc957SDaniel Bristot de Oliveira /* disabled by default */
5197d0dc957SDaniel Bristot de Oliveira params->dma_latency = -1;
5207d0dc957SDaniel Bristot de Oliveira
521a828cd18SDaniel Bristot de Oliveira /* display data in microseconds */
522a828cd18SDaniel Bristot de Oliveira params->output_divisor = 1000;
523a828cd18SDaniel Bristot de Oliveira
524a828cd18SDaniel Bristot de Oliveira while (1) {
525a828cd18SDaniel Bristot de Oliveira static struct option long_options[] = {
526173a3b01SDaniel Bristot de Oliveira {"auto", required_argument, 0, 'a'},
527a828cd18SDaniel Bristot de Oliveira {"cpus", required_argument, 0, 'c'},
528a957cbc0SDaniel Bristot de Oliveira {"cgroup", optional_argument, 0, 'C'},
529a828cd18SDaniel Bristot de Oliveira {"debug", no_argument, 0, 'D'},
530a828cd18SDaniel Bristot de Oliveira {"duration", required_argument, 0, 'd'},
53151d64c3aSDaniel Bristot de Oliveira {"event", required_argument, 0, 'e'},
532a828cd18SDaniel Bristot de Oliveira {"help", no_argument, 0, 'h'},
533272ced25SDaniel Bristot de Oliveira {"house-keeping", required_argument, 0, 'H'},
534a828cd18SDaniel Bristot de Oliveira {"irq", required_argument, 0, 'i'},
535a828cd18SDaniel Bristot de Oliveira {"nano", no_argument, 0, 'n'},
536a828cd18SDaniel Bristot de Oliveira {"period", required_argument, 0, 'p'},
537a828cd18SDaniel Bristot de Oliveira {"priority", required_argument, 0, 'P'},
538a828cd18SDaniel Bristot de Oliveira {"quiet", no_argument, 0, 'q'},
539a828cd18SDaniel Bristot de Oliveira {"stack", required_argument, 0, 's'},
540a828cd18SDaniel Bristot de Oliveira {"thread", required_argument, 0, 'T'},
541a828cd18SDaniel Bristot de Oliveira {"trace", optional_argument, 0, 't'},
542cdca4f4eSDaniel Bristot de Oliveira {"user-threads", no_argument, 0, 'u'},
543fb9e90a6SDaniel Bristot de Oliveira {"kernel-threads", no_argument, 0, 'k'},
544a23c05fdSDaniel Bristot de Oliveira {"user-load", no_argument, 0, 'U'},
5451a754893SDaniel Bristot de Oliveira {"trigger", required_argument, 0, '0'},
54644f3a37dSDaniel Bristot de Oliveira {"filter", required_argument, 0, '1'},
5477d0dc957SDaniel Bristot de Oliveira {"dma-latency", required_argument, 0, '2'},
5485def33dfSDaniel Bristot de Oliveira {"no-aa", no_argument, 0, '3'},
5495def33dfSDaniel Bristot de Oliveira {"dump-tasks", no_argument, 0, '4'},
5509fa48a24SDaniel Bristot de Oliveira {"aa-only", required_argument, 0, '5'},
551cdbf7196SDaniel Bristot de Oliveira {"warm-up", required_argument, 0, '6'},
552e9a4062eSDaniel Bristot de Oliveira {"trace-buffer-size", required_argument, 0, '7'},
553a828cd18SDaniel Bristot de Oliveira {0, 0, 0, 0}
554a828cd18SDaniel Bristot de Oliveira };
555a828cd18SDaniel Bristot de Oliveira
556a828cd18SDaniel Bristot de Oliveira /* getopt_long stores the option index here. */
557a828cd18SDaniel Bristot de Oliveira int option_index = 0;
558a828cd18SDaniel Bristot de Oliveira
559e9a4062eSDaniel Bristot de Oliveira c = getopt_long(argc, argv, "a:c:C::d:De:hH:i:knp:P:qs:t::T:uU0:1:2:345:6:7:",
560a828cd18SDaniel Bristot de Oliveira long_options, &option_index);
561a828cd18SDaniel Bristot de Oliveira
562a828cd18SDaniel Bristot de Oliveira /* detect the end of the options. */
563a828cd18SDaniel Bristot de Oliveira if (c == -1)
564a828cd18SDaniel Bristot de Oliveira break;
565a828cd18SDaniel Bristot de Oliveira
566a828cd18SDaniel Bristot de Oliveira switch (c) {
567173a3b01SDaniel Bristot de Oliveira case 'a':
568173a3b01SDaniel Bristot de Oliveira auto_thresh = get_llong_from_str(optarg);
569173a3b01SDaniel Bristot de Oliveira
570173a3b01SDaniel Bristot de Oliveira /* set thread stop to auto_thresh */
571173a3b01SDaniel Bristot de Oliveira params->stop_total_us = auto_thresh;
5725def33dfSDaniel Bristot de Oliveira params->stop_us = auto_thresh;
573173a3b01SDaniel Bristot de Oliveira
574173a3b01SDaniel Bristot de Oliveira /* get stack trace */
575173a3b01SDaniel Bristot de Oliveira params->print_stack = auto_thresh;
576173a3b01SDaniel Bristot de Oliveira
577173a3b01SDaniel Bristot de Oliveira /* set trace */
578173a3b01SDaniel Bristot de Oliveira params->trace_output = "timerlat_trace.txt";
579173a3b01SDaniel Bristot de Oliveira break;
5809fa48a24SDaniel Bristot de Oliveira case '5':
5819fa48a24SDaniel Bristot de Oliveira /* it is here because it is similar to -a */
5829fa48a24SDaniel Bristot de Oliveira auto_thresh = get_llong_from_str(optarg);
5839fa48a24SDaniel Bristot de Oliveira
5849fa48a24SDaniel Bristot de Oliveira /* set thread stop to auto_thresh */
5859fa48a24SDaniel Bristot de Oliveira params->stop_total_us = auto_thresh;
5869fa48a24SDaniel Bristot de Oliveira params->stop_us = auto_thresh;
5879fa48a24SDaniel Bristot de Oliveira
5889fa48a24SDaniel Bristot de Oliveira /* get stack trace */
5899fa48a24SDaniel Bristot de Oliveira params->print_stack = auto_thresh;
5909fa48a24SDaniel Bristot de Oliveira
5919fa48a24SDaniel Bristot de Oliveira /* set aa_only to avoid parsing the trace */
5929fa48a24SDaniel Bristot de Oliveira params->aa_only = 1;
5939fa48a24SDaniel Bristot de Oliveira break;
594a828cd18SDaniel Bristot de Oliveira case 'c':
595894c29c7SDaniel Bristot de Oliveira retval = parse_cpu_set(optarg, ¶ms->monitored_cpus);
596a828cd18SDaniel Bristot de Oliveira if (retval)
597a828cd18SDaniel Bristot de Oliveira timerlat_top_usage("\nInvalid -c cpu list\n");
598a828cd18SDaniel Bristot de Oliveira params->cpus = optarg;
599a828cd18SDaniel Bristot de Oliveira break;
600a957cbc0SDaniel Bristot de Oliveira case 'C':
601a957cbc0SDaniel Bristot de Oliveira params->cgroup = 1;
602a957cbc0SDaniel Bristot de Oliveira if (!optarg) {
603a957cbc0SDaniel Bristot de Oliveira /* will inherit this cgroup */
604a957cbc0SDaniel Bristot de Oliveira params->cgroup_name = NULL;
605a957cbc0SDaniel Bristot de Oliveira } else if (*optarg == '=') {
606a957cbc0SDaniel Bristot de Oliveira /* skip the = */
607a957cbc0SDaniel Bristot de Oliveira params->cgroup_name = ++optarg;
608a957cbc0SDaniel Bristot de Oliveira }
609a957cbc0SDaniel Bristot de Oliveira break;
610a828cd18SDaniel Bristot de Oliveira case 'D':
611a828cd18SDaniel Bristot de Oliveira config_debug = 1;
612a828cd18SDaniel Bristot de Oliveira break;
613a828cd18SDaniel Bristot de Oliveira case 'd':
614a828cd18SDaniel Bristot de Oliveira params->duration = parse_seconds_duration(optarg);
615a828cd18SDaniel Bristot de Oliveira if (!params->duration)
616a828cd18SDaniel Bristot de Oliveira timerlat_top_usage("Invalid -D duration\n");
617a828cd18SDaniel Bristot de Oliveira break;
61851d64c3aSDaniel Bristot de Oliveira case 'e':
61951d64c3aSDaniel Bristot de Oliveira tevent = trace_event_alloc(optarg);
62051d64c3aSDaniel Bristot de Oliveira if (!tevent) {
62151d64c3aSDaniel Bristot de Oliveira err_msg("Error alloc trace event");
62251d64c3aSDaniel Bristot de Oliveira exit(EXIT_FAILURE);
62351d64c3aSDaniel Bristot de Oliveira }
62451d64c3aSDaniel Bristot de Oliveira
62551d64c3aSDaniel Bristot de Oliveira if (params->events)
62651d64c3aSDaniel Bristot de Oliveira tevent->next = params->events;
62751d64c3aSDaniel Bristot de Oliveira params->events = tevent;
62851d64c3aSDaniel Bristot de Oliveira break;
629a828cd18SDaniel Bristot de Oliveira case 'h':
630a828cd18SDaniel Bristot de Oliveira case '?':
631a828cd18SDaniel Bristot de Oliveira timerlat_top_usage(NULL);
632a828cd18SDaniel Bristot de Oliveira break;
633272ced25SDaniel Bristot de Oliveira case 'H':
634272ced25SDaniel Bristot de Oliveira params->hk_cpus = 1;
635272ced25SDaniel Bristot de Oliveira retval = parse_cpu_set(optarg, ¶ms->hk_cpu_set);
636272ced25SDaniel Bristot de Oliveira if (retval) {
637272ced25SDaniel Bristot de Oliveira err_msg("Error parsing house keeping CPUs\n");
638272ced25SDaniel Bristot de Oliveira exit(EXIT_FAILURE);
639272ced25SDaniel Bristot de Oliveira }
640272ced25SDaniel Bristot de Oliveira break;
641a828cd18SDaniel Bristot de Oliveira case 'i':
642a828cd18SDaniel Bristot de Oliveira params->stop_us = get_llong_from_str(optarg);
643a828cd18SDaniel Bristot de Oliveira break;
644fb9e90a6SDaniel Bristot de Oliveira case 'k':
645fb9e90a6SDaniel Bristot de Oliveira params->kernel_workload = true;
646fb9e90a6SDaniel Bristot de Oliveira break;
647a828cd18SDaniel Bristot de Oliveira case 'n':
648a828cd18SDaniel Bristot de Oliveira params->output_divisor = 1;
649a828cd18SDaniel Bristot de Oliveira break;
650a828cd18SDaniel Bristot de Oliveira case 'p':
651a828cd18SDaniel Bristot de Oliveira params->timerlat_period_us = get_llong_from_str(optarg);
652a828cd18SDaniel Bristot de Oliveira if (params->timerlat_period_us > 1000000)
653a828cd18SDaniel Bristot de Oliveira timerlat_top_usage("Period longer than 1 s\n");
654a828cd18SDaniel Bristot de Oliveira break;
655a828cd18SDaniel Bristot de Oliveira case 'P':
656a828cd18SDaniel Bristot de Oliveira retval = parse_prio(optarg, ¶ms->sched_param);
657a828cd18SDaniel Bristot de Oliveira if (retval == -1)
658a828cd18SDaniel Bristot de Oliveira timerlat_top_usage("Invalid -P priority");
659a828cd18SDaniel Bristot de Oliveira params->set_sched = 1;
660a828cd18SDaniel Bristot de Oliveira break;
661a828cd18SDaniel Bristot de Oliveira case 'q':
662a828cd18SDaniel Bristot de Oliveira params->quiet = 1;
663a828cd18SDaniel Bristot de Oliveira break;
664a828cd18SDaniel Bristot de Oliveira case 's':
665a828cd18SDaniel Bristot de Oliveira params->print_stack = get_llong_from_str(optarg);
666a828cd18SDaniel Bristot de Oliveira break;
667a828cd18SDaniel Bristot de Oliveira case 'T':
668a828cd18SDaniel Bristot de Oliveira params->stop_total_us = get_llong_from_str(optarg);
669a828cd18SDaniel Bristot de Oliveira break;
670a828cd18SDaniel Bristot de Oliveira case 't':
671*842fc5b8SJohn Kacur if (optarg) {
672*842fc5b8SJohn Kacur if (optarg[0] == '=')
673a828cd18SDaniel Bristot de Oliveira params->trace_output = &optarg[1];
674a828cd18SDaniel Bristot de Oliveira else
675*842fc5b8SJohn Kacur params->trace_output = &optarg[0];
676*842fc5b8SJohn Kacur } else if (optind < argc && argv[optind][0] != '-')
677*842fc5b8SJohn Kacur params->trace_output = argv[optind];
678*842fc5b8SJohn Kacur else
679a828cd18SDaniel Bristot de Oliveira params->trace_output = "timerlat_trace.txt";
6805def33dfSDaniel Bristot de Oliveira
681a828cd18SDaniel Bristot de Oliveira break;
682cdca4f4eSDaniel Bristot de Oliveira case 'u':
683a23c05fdSDaniel Bristot de Oliveira params->user_workload = true;
684a23c05fdSDaniel Bristot de Oliveira /* fallback: -u implies -U */
685a23c05fdSDaniel Bristot de Oliveira case 'U':
686cdca4f4eSDaniel Bristot de Oliveira params->user_top = true;
687cdca4f4eSDaniel Bristot de Oliveira break;
6881a754893SDaniel Bristot de Oliveira case '0': /* trigger */
6891a754893SDaniel Bristot de Oliveira if (params->events) {
6901a754893SDaniel Bristot de Oliveira retval = trace_event_add_trigger(params->events, optarg);
6911a754893SDaniel Bristot de Oliveira if (retval) {
6921a754893SDaniel Bristot de Oliveira err_msg("Error adding trigger %s\n", optarg);
6931a754893SDaniel Bristot de Oliveira exit(EXIT_FAILURE);
6941a754893SDaniel Bristot de Oliveira }
6951a754893SDaniel Bristot de Oliveira } else {
6961a754893SDaniel Bristot de Oliveira timerlat_top_usage("--trigger requires a previous -e\n");
6971a754893SDaniel Bristot de Oliveira }
6981a754893SDaniel Bristot de Oliveira break;
69944f3a37dSDaniel Bristot de Oliveira case '1': /* filter */
70044f3a37dSDaniel Bristot de Oliveira if (params->events) {
70144f3a37dSDaniel Bristot de Oliveira retval = trace_event_add_filter(params->events, optarg);
70244f3a37dSDaniel Bristot de Oliveira if (retval) {
70344f3a37dSDaniel Bristot de Oliveira err_msg("Error adding filter %s\n", optarg);
70444f3a37dSDaniel Bristot de Oliveira exit(EXIT_FAILURE);
70544f3a37dSDaniel Bristot de Oliveira }
70644f3a37dSDaniel Bristot de Oliveira } else {
70744f3a37dSDaniel Bristot de Oliveira timerlat_top_usage("--filter requires a previous -e\n");
70844f3a37dSDaniel Bristot de Oliveira }
70944f3a37dSDaniel Bristot de Oliveira break;
7107d0dc957SDaniel Bristot de Oliveira case '2': /* dma-latency */
7117d0dc957SDaniel Bristot de Oliveira params->dma_latency = get_llong_from_str(optarg);
7127d0dc957SDaniel Bristot de Oliveira if (params->dma_latency < 0 || params->dma_latency > 10000) {
7137d0dc957SDaniel Bristot de Oliveira err_msg("--dma-latency needs to be >= 0 and < 10000");
7147d0dc957SDaniel Bristot de Oliveira exit(EXIT_FAILURE);
7157d0dc957SDaniel Bristot de Oliveira }
7167d0dc957SDaniel Bristot de Oliveira break;
7175def33dfSDaniel Bristot de Oliveira case '3': /* no-aa */
7185def33dfSDaniel Bristot de Oliveira params->no_aa = 1;
7195def33dfSDaniel Bristot de Oliveira break;
7205def33dfSDaniel Bristot de Oliveira case '4':
7215def33dfSDaniel Bristot de Oliveira params->dump_tasks = 1;
7225def33dfSDaniel Bristot de Oliveira break;
723cdbf7196SDaniel Bristot de Oliveira case '6':
724cdbf7196SDaniel Bristot de Oliveira params->warmup = get_llong_from_str(optarg);
725cdbf7196SDaniel Bristot de Oliveira break;
726e9a4062eSDaniel Bristot de Oliveira case '7':
727e9a4062eSDaniel Bristot de Oliveira params->buffer_size = get_llong_from_str(optarg);
728e9a4062eSDaniel Bristot de Oliveira break;
729a828cd18SDaniel Bristot de Oliveira default:
730a828cd18SDaniel Bristot de Oliveira timerlat_top_usage("Invalid option");
731a828cd18SDaniel Bristot de Oliveira }
732a828cd18SDaniel Bristot de Oliveira }
733a828cd18SDaniel Bristot de Oliveira
734a828cd18SDaniel Bristot de Oliveira if (geteuid()) {
735a828cd18SDaniel Bristot de Oliveira err_msg("rtla needs root permission\n");
736a828cd18SDaniel Bristot de Oliveira exit(EXIT_FAILURE);
737a828cd18SDaniel Bristot de Oliveira }
738a828cd18SDaniel Bristot de Oliveira
7395def33dfSDaniel Bristot de Oliveira /*
7405def33dfSDaniel Bristot de Oliveira * Auto analysis only happens if stop tracing, thus:
7415def33dfSDaniel Bristot de Oliveira */
7425def33dfSDaniel Bristot de Oliveira if (!params->stop_us && !params->stop_total_us)
7435def33dfSDaniel Bristot de Oliveira params->no_aa = 1;
7445def33dfSDaniel Bristot de Oliveira
7459fa48a24SDaniel Bristot de Oliveira if (params->no_aa && params->aa_only)
7469fa48a24SDaniel Bristot de Oliveira timerlat_top_usage("--no-aa and --aa-only are mutually exclusive!");
7479fa48a24SDaniel Bristot de Oliveira
748fb9e90a6SDaniel Bristot de Oliveira if (params->kernel_workload && params->user_workload)
749fb9e90a6SDaniel Bristot de Oliveira timerlat_top_usage("--kernel-threads and --user-threads are mutually exclusive!");
750fb9e90a6SDaniel Bristot de Oliveira
751a828cd18SDaniel Bristot de Oliveira return params;
752a828cd18SDaniel Bristot de Oliveira }
753a828cd18SDaniel Bristot de Oliveira
754a828cd18SDaniel Bristot de Oliveira /*
755a828cd18SDaniel Bristot de Oliveira * timerlat_top_apply_config - apply the top configs to the initialized tool
756a828cd18SDaniel Bristot de Oliveira */
757a828cd18SDaniel Bristot de Oliveira static int
timerlat_top_apply_config(struct osnoise_tool * top,struct timerlat_top_params * params)758a828cd18SDaniel Bristot de Oliveira timerlat_top_apply_config(struct osnoise_tool *top, struct timerlat_top_params *params)
759a828cd18SDaniel Bristot de Oliveira {
760a828cd18SDaniel Bristot de Oliveira int retval;
761cdca4f4eSDaniel Bristot de Oliveira int i;
762a828cd18SDaniel Bristot de Oliveira
763a828cd18SDaniel Bristot de Oliveira if (!params->sleep_time)
764a828cd18SDaniel Bristot de Oliveira params->sleep_time = 1;
765a828cd18SDaniel Bristot de Oliveira
766a828cd18SDaniel Bristot de Oliveira if (params->cpus) {
767a828cd18SDaniel Bristot de Oliveira retval = osnoise_set_cpus(top->context, params->cpus);
768a828cd18SDaniel Bristot de Oliveira if (retval) {
769a828cd18SDaniel Bristot de Oliveira err_msg("Failed to apply CPUs config\n");
770a828cd18SDaniel Bristot de Oliveira goto out_err;
771a828cd18SDaniel Bristot de Oliveira }
772cdca4f4eSDaniel Bristot de Oliveira } else {
773cdca4f4eSDaniel Bristot de Oliveira for (i = 0; i < sysconf(_SC_NPROCESSORS_CONF); i++)
774cdca4f4eSDaniel Bristot de Oliveira CPU_SET(i, ¶ms->monitored_cpus);
775a828cd18SDaniel Bristot de Oliveira }
776a828cd18SDaniel Bristot de Oliveira
777a828cd18SDaniel Bristot de Oliveira if (params->stop_us) {
778a828cd18SDaniel Bristot de Oliveira retval = osnoise_set_stop_us(top->context, params->stop_us);
779a828cd18SDaniel Bristot de Oliveira if (retval) {
780a828cd18SDaniel Bristot de Oliveira err_msg("Failed to set stop us\n");
781a828cd18SDaniel Bristot de Oliveira goto out_err;
782a828cd18SDaniel Bristot de Oliveira }
783a828cd18SDaniel Bristot de Oliveira }
784a828cd18SDaniel Bristot de Oliveira
785a828cd18SDaniel Bristot de Oliveira if (params->stop_total_us) {
786a828cd18SDaniel Bristot de Oliveira retval = osnoise_set_stop_total_us(top->context, params->stop_total_us);
787a828cd18SDaniel Bristot de Oliveira if (retval) {
788a828cd18SDaniel Bristot de Oliveira err_msg("Failed to set stop total us\n");
789a828cd18SDaniel Bristot de Oliveira goto out_err;
790a828cd18SDaniel Bristot de Oliveira }
791a828cd18SDaniel Bristot de Oliveira }
792a828cd18SDaniel Bristot de Oliveira
793a828cd18SDaniel Bristot de Oliveira
794a828cd18SDaniel Bristot de Oliveira if (params->timerlat_period_us) {
795a828cd18SDaniel Bristot de Oliveira retval = osnoise_set_timerlat_period_us(top->context, params->timerlat_period_us);
796a828cd18SDaniel Bristot de Oliveira if (retval) {
797a828cd18SDaniel Bristot de Oliveira err_msg("Failed to set timerlat period\n");
798a828cd18SDaniel Bristot de Oliveira goto out_err;
799a828cd18SDaniel Bristot de Oliveira }
800a828cd18SDaniel Bristot de Oliveira }
801a828cd18SDaniel Bristot de Oliveira
802a828cd18SDaniel Bristot de Oliveira
803a828cd18SDaniel Bristot de Oliveira if (params->print_stack) {
804a828cd18SDaniel Bristot de Oliveira retval = osnoise_set_print_stack(top->context, params->print_stack);
805a828cd18SDaniel Bristot de Oliveira if (retval) {
806a828cd18SDaniel Bristot de Oliveira err_msg("Failed to set print stack\n");
807a828cd18SDaniel Bristot de Oliveira goto out_err;
808a828cd18SDaniel Bristot de Oliveira }
809a828cd18SDaniel Bristot de Oliveira }
810a828cd18SDaniel Bristot de Oliveira
811272ced25SDaniel Bristot de Oliveira if (params->hk_cpus) {
812272ced25SDaniel Bristot de Oliveira retval = sched_setaffinity(getpid(), sizeof(params->hk_cpu_set),
813272ced25SDaniel Bristot de Oliveira ¶ms->hk_cpu_set);
814272ced25SDaniel Bristot de Oliveira if (retval == -1) {
815272ced25SDaniel Bristot de Oliveira err_msg("Failed to set rtla to the house keeping CPUs\n");
816272ced25SDaniel Bristot de Oliveira goto out_err;
817272ced25SDaniel Bristot de Oliveira }
818c58a3f8cSDaniel Bristot de Oliveira } else if (params->cpus) {
819c58a3f8cSDaniel Bristot de Oliveira /*
820c58a3f8cSDaniel Bristot de Oliveira * Even if the user do not set a house-keeping CPU, try to
821c58a3f8cSDaniel Bristot de Oliveira * move rtla to a CPU set different to the one where the user
822c58a3f8cSDaniel Bristot de Oliveira * set the workload to run.
823c58a3f8cSDaniel Bristot de Oliveira *
824c58a3f8cSDaniel Bristot de Oliveira * No need to check results as this is an automatic attempt.
825c58a3f8cSDaniel Bristot de Oliveira */
826c58a3f8cSDaniel Bristot de Oliveira auto_house_keeping(¶ms->monitored_cpus);
827272ced25SDaniel Bristot de Oliveira }
828272ced25SDaniel Bristot de Oliveira
829fb9e90a6SDaniel Bristot de Oliveira /*
830fb9e90a6SDaniel Bristot de Oliveira * If the user did not specify a type of thread, try user-threads first.
831fb9e90a6SDaniel Bristot de Oliveira * Fall back to kernel threads otherwise.
832fb9e90a6SDaniel Bristot de Oliveira */
833fb9e90a6SDaniel Bristot de Oliveira if (!params->kernel_workload && !params->user_workload) {
834fb9e90a6SDaniel Bristot de Oliveira retval = tracefs_file_exists(NULL, "osnoise/per_cpu/cpu0/timerlat_fd");
835fb9e90a6SDaniel Bristot de Oliveira if (retval) {
836fb9e90a6SDaniel Bristot de Oliveira debug_msg("User-space interface detected, setting user-threads\n");
837fb9e90a6SDaniel Bristot de Oliveira params->user_workload = 1;
838fb9e90a6SDaniel Bristot de Oliveira params->user_top = 1;
839fb9e90a6SDaniel Bristot de Oliveira } else {
840fb9e90a6SDaniel Bristot de Oliveira debug_msg("User-space interface not detected, setting kernel-threads\n");
841fb9e90a6SDaniel Bristot de Oliveira params->kernel_workload = 1;
842fb9e90a6SDaniel Bristot de Oliveira }
843fb9e90a6SDaniel Bristot de Oliveira }
844fb9e90a6SDaniel Bristot de Oliveira
845cdca4f4eSDaniel Bristot de Oliveira if (params->user_top) {
846cdca4f4eSDaniel Bristot de Oliveira retval = osnoise_set_workload(top->context, 0);
847cdca4f4eSDaniel Bristot de Oliveira if (retval) {
848cdca4f4eSDaniel Bristot de Oliveira err_msg("Failed to set OSNOISE_WORKLOAD option\n");
849cdca4f4eSDaniel Bristot de Oliveira goto out_err;
850cdca4f4eSDaniel Bristot de Oliveira }
851cdca4f4eSDaniel Bristot de Oliveira }
852cdca4f4eSDaniel Bristot de Oliveira
853f5c0cdadSDaniel Bristot de Oliveira if (isatty(1) && !params->quiet)
854f5c0cdadSDaniel Bristot de Oliveira params->pretty_output = 1;
855f5c0cdadSDaniel Bristot de Oliveira
856a828cd18SDaniel Bristot de Oliveira return 0;
857a828cd18SDaniel Bristot de Oliveira
858a828cd18SDaniel Bristot de Oliveira out_err:
859a828cd18SDaniel Bristot de Oliveira return -1;
860a828cd18SDaniel Bristot de Oliveira }
861a828cd18SDaniel Bristot de Oliveira
862a828cd18SDaniel Bristot de Oliveira /*
863a828cd18SDaniel Bristot de Oliveira * timerlat_init_top - initialize a timerlat top tool with parameters
864a828cd18SDaniel Bristot de Oliveira */
865a828cd18SDaniel Bristot de Oliveira static struct osnoise_tool
timerlat_init_top(struct timerlat_top_params * params)866a828cd18SDaniel Bristot de Oliveira *timerlat_init_top(struct timerlat_top_params *params)
867a828cd18SDaniel Bristot de Oliveira {
868a828cd18SDaniel Bristot de Oliveira struct osnoise_tool *top;
869a828cd18SDaniel Bristot de Oliveira int nr_cpus;
870a828cd18SDaniel Bristot de Oliveira
871a828cd18SDaniel Bristot de Oliveira nr_cpus = sysconf(_SC_NPROCESSORS_CONF);
872a828cd18SDaniel Bristot de Oliveira
873a828cd18SDaniel Bristot de Oliveira top = osnoise_init_tool("timerlat_top");
874a828cd18SDaniel Bristot de Oliveira if (!top)
875a828cd18SDaniel Bristot de Oliveira return NULL;
876a828cd18SDaniel Bristot de Oliveira
877a828cd18SDaniel Bristot de Oliveira top->data = timerlat_alloc_top(nr_cpus);
878a828cd18SDaniel Bristot de Oliveira if (!top->data)
879a828cd18SDaniel Bristot de Oliveira goto out_err;
880a828cd18SDaniel Bristot de Oliveira
881a828cd18SDaniel Bristot de Oliveira top->params = params;
882a828cd18SDaniel Bristot de Oliveira
883a828cd18SDaniel Bristot de Oliveira tep_register_event_handler(top->trace.tep, -1, "ftrace", "timerlat",
884a828cd18SDaniel Bristot de Oliveira timerlat_top_handler, top);
885a828cd18SDaniel Bristot de Oliveira
886a828cd18SDaniel Bristot de Oliveira return top;
887a828cd18SDaniel Bristot de Oliveira
888a828cd18SDaniel Bristot de Oliveira out_err:
889a828cd18SDaniel Bristot de Oliveira osnoise_destroy_tool(top);
890a828cd18SDaniel Bristot de Oliveira return NULL;
891a828cd18SDaniel Bristot de Oliveira }
892a828cd18SDaniel Bristot de Oliveira
893a828cd18SDaniel Bristot de Oliveira static int stop_tracing;
stop_top(int sig)894a828cd18SDaniel Bristot de Oliveira static void stop_top(int sig)
895a828cd18SDaniel Bristot de Oliveira {
896a828cd18SDaniel Bristot de Oliveira stop_tracing = 1;
897a828cd18SDaniel Bristot de Oliveira }
898a828cd18SDaniel Bristot de Oliveira
899a828cd18SDaniel Bristot de Oliveira /*
900a828cd18SDaniel Bristot de Oliveira * timerlat_top_set_signals - handles the signal to stop the tool
901a828cd18SDaniel Bristot de Oliveira */
902a828cd18SDaniel Bristot de Oliveira static void
timerlat_top_set_signals(struct timerlat_top_params * params)903a828cd18SDaniel Bristot de Oliveira timerlat_top_set_signals(struct timerlat_top_params *params)
904a828cd18SDaniel Bristot de Oliveira {
905a828cd18SDaniel Bristot de Oliveira signal(SIGINT, stop_top);
906a828cd18SDaniel Bristot de Oliveira if (params->duration) {
907a828cd18SDaniel Bristot de Oliveira signal(SIGALRM, stop_top);
908a828cd18SDaniel Bristot de Oliveira alarm(params->duration);
909a828cd18SDaniel Bristot de Oliveira }
910a828cd18SDaniel Bristot de Oliveira }
911a828cd18SDaniel Bristot de Oliveira
timerlat_top_main(int argc,char * argv[])912a828cd18SDaniel Bristot de Oliveira int timerlat_top_main(int argc, char *argv[])
913a828cd18SDaniel Bristot de Oliveira {
914a828cd18SDaniel Bristot de Oliveira struct timerlat_top_params *params;
9154bbf59a9SDaniel Bristot de Oliveira struct osnoise_tool *record = NULL;
916cdca4f4eSDaniel Bristot de Oliveira struct timerlat_u_params params_u;
9174bbf59a9SDaniel Bristot de Oliveira struct osnoise_tool *top = NULL;
918c66552beSDaniel Bristot de Oliveira struct osnoise_tool *aa = NULL;
919a828cd18SDaniel Bristot de Oliveira struct trace_instance *trace;
9207d0dc957SDaniel Bristot de Oliveira int dma_latency_fd = -1;
921cdca4f4eSDaniel Bristot de Oliveira pthread_t timerlat_u;
922a828cd18SDaniel Bristot de Oliveira int return_value = 1;
9239fa48a24SDaniel Bristot de Oliveira char *max_lat;
924a828cd18SDaniel Bristot de Oliveira int retval;
925a828cd18SDaniel Bristot de Oliveira
926a828cd18SDaniel Bristot de Oliveira params = timerlat_top_parse_args(argc, argv);
927a828cd18SDaniel Bristot de Oliveira if (!params)
928a828cd18SDaniel Bristot de Oliveira exit(1);
929a828cd18SDaniel Bristot de Oliveira
930a828cd18SDaniel Bristot de Oliveira top = timerlat_init_top(params);
931a828cd18SDaniel Bristot de Oliveira if (!top) {
932a828cd18SDaniel Bristot de Oliveira err_msg("Could not init osnoise top\n");
933a828cd18SDaniel Bristot de Oliveira goto out_exit;
934a828cd18SDaniel Bristot de Oliveira }
935a828cd18SDaniel Bristot de Oliveira
936a828cd18SDaniel Bristot de Oliveira retval = timerlat_top_apply_config(top, params);
937a828cd18SDaniel Bristot de Oliveira if (retval) {
938a828cd18SDaniel Bristot de Oliveira err_msg("Could not apply config\n");
9392a6b52edSWan Jiabing goto out_free;
940a828cd18SDaniel Bristot de Oliveira }
941a828cd18SDaniel Bristot de Oliveira
942a828cd18SDaniel Bristot de Oliveira trace = &top->trace;
943a828cd18SDaniel Bristot de Oliveira
944a828cd18SDaniel Bristot de Oliveira retval = enable_timerlat(trace);
945a828cd18SDaniel Bristot de Oliveira if (retval) {
946a828cd18SDaniel Bristot de Oliveira err_msg("Failed to enable timerlat tracer\n");
9472a6b52edSWan Jiabing goto out_free;
948a828cd18SDaniel Bristot de Oliveira }
949a828cd18SDaniel Bristot de Oliveira
950a828cd18SDaniel Bristot de Oliveira if (params->set_sched) {
951a828cd18SDaniel Bristot de Oliveira retval = set_comm_sched_attr("timerlat/", ¶ms->sched_param);
952a828cd18SDaniel Bristot de Oliveira if (retval) {
953a828cd18SDaniel Bristot de Oliveira err_msg("Failed to set sched parameters\n");
9542a6b52edSWan Jiabing goto out_free;
955a828cd18SDaniel Bristot de Oliveira }
956a828cd18SDaniel Bristot de Oliveira }
957a828cd18SDaniel Bristot de Oliveira
958cdca4f4eSDaniel Bristot de Oliveira if (params->cgroup && !params->user_top) {
959a957cbc0SDaniel Bristot de Oliveira retval = set_comm_cgroup("timerlat/", params->cgroup_name);
960a957cbc0SDaniel Bristot de Oliveira if (!retval) {
961a957cbc0SDaniel Bristot de Oliveira err_msg("Failed to move threads to cgroup\n");
962a957cbc0SDaniel Bristot de Oliveira goto out_free;
963a957cbc0SDaniel Bristot de Oliveira }
964a957cbc0SDaniel Bristot de Oliveira }
965a957cbc0SDaniel Bristot de Oliveira
9667d0dc957SDaniel Bristot de Oliveira if (params->dma_latency >= 0) {
9677d0dc957SDaniel Bristot de Oliveira dma_latency_fd = set_cpu_dma_latency(params->dma_latency);
9687d0dc957SDaniel Bristot de Oliveira if (dma_latency_fd < 0) {
9697d0dc957SDaniel Bristot de Oliveira err_msg("Could not set /dev/cpu_dma_latency.\n");
9702a6b52edSWan Jiabing goto out_free;
9717d0dc957SDaniel Bristot de Oliveira }
9727d0dc957SDaniel Bristot de Oliveira }
9737d0dc957SDaniel Bristot de Oliveira
974a828cd18SDaniel Bristot de Oliveira if (params->trace_output) {
975a828cd18SDaniel Bristot de Oliveira record = osnoise_init_trace_tool("timerlat");
976a828cd18SDaniel Bristot de Oliveira if (!record) {
977a828cd18SDaniel Bristot de Oliveira err_msg("Failed to enable the trace instance\n");
9782a6b52edSWan Jiabing goto out_free;
979a828cd18SDaniel Bristot de Oliveira }
98051d64c3aSDaniel Bristot de Oliveira
98151d64c3aSDaniel Bristot de Oliveira if (params->events) {
98251d64c3aSDaniel Bristot de Oliveira retval = trace_events_enable(&record->trace, params->events);
98351d64c3aSDaniel Bristot de Oliveira if (retval)
98451d64c3aSDaniel Bristot de Oliveira goto out_top;
98551d64c3aSDaniel Bristot de Oliveira }
986e9a4062eSDaniel Bristot de Oliveira
987e9a4062eSDaniel Bristot de Oliveira if (params->buffer_size > 0) {
988e9a4062eSDaniel Bristot de Oliveira retval = trace_set_buffer_size(&record->trace, params->buffer_size);
989e9a4062eSDaniel Bristot de Oliveira if (retval)
990e9a4062eSDaniel Bristot de Oliveira goto out_top;
991e9a4062eSDaniel Bristot de Oliveira }
992a828cd18SDaniel Bristot de Oliveira }
993a828cd18SDaniel Bristot de Oliveira
994c66552beSDaniel Bristot de Oliveira if (!params->no_aa) {
995c66552beSDaniel Bristot de Oliveira if (params->aa_only) {
996c66552beSDaniel Bristot de Oliveira /* as top is not used for display, use it for aa */
997c66552beSDaniel Bristot de Oliveira aa = top;
998c66552beSDaniel Bristot de Oliveira } else {
999c66552beSDaniel Bristot de Oliveira /* otherwise, a new instance is needed */
1000c66552beSDaniel Bristot de Oliveira aa = osnoise_init_tool("timerlat_aa");
1001c66552beSDaniel Bristot de Oliveira if (!aa)
1002c66552beSDaniel Bristot de Oliveira goto out_top;
1003c66552beSDaniel Bristot de Oliveira }
1004c66552beSDaniel Bristot de Oliveira
1005c66552beSDaniel Bristot de Oliveira retval = timerlat_aa_init(aa, params->dump_tasks);
1006c66552beSDaniel Bristot de Oliveira if (retval) {
1007c66552beSDaniel Bristot de Oliveira err_msg("Failed to enable the auto analysis instance\n");
1008c66552beSDaniel Bristot de Oliveira goto out_top;
1009c66552beSDaniel Bristot de Oliveira }
1010c66552beSDaniel Bristot de Oliveira
1011c66552beSDaniel Bristot de Oliveira /* if it is re-using the main instance, there is no need to start it */
1012c66552beSDaniel Bristot de Oliveira if (aa != top) {
1013c66552beSDaniel Bristot de Oliveira retval = enable_timerlat(&aa->trace);
1014c66552beSDaniel Bristot de Oliveira if (retval) {
1015c66552beSDaniel Bristot de Oliveira err_msg("Failed to enable timerlat tracer\n");
1016c66552beSDaniel Bristot de Oliveira goto out_top;
1017c66552beSDaniel Bristot de Oliveira }
101857cf76ecSDaniel Bristot de Oliveira }
101957cf76ecSDaniel Bristot de Oliveira }
1020c66552beSDaniel Bristot de Oliveira
1021a23c05fdSDaniel Bristot de Oliveira if (params->user_workload) {
1022cdca4f4eSDaniel Bristot de Oliveira /* rtla asked to stop */
1023cdca4f4eSDaniel Bristot de Oliveira params_u.should_run = 1;
1024cdca4f4eSDaniel Bristot de Oliveira /* all threads left */
1025cdca4f4eSDaniel Bristot de Oliveira params_u.stopped_running = 0;
1026cdca4f4eSDaniel Bristot de Oliveira
1027cdca4f4eSDaniel Bristot de Oliveira params_u.set = ¶ms->monitored_cpus;
1028cdca4f4eSDaniel Bristot de Oliveira if (params->set_sched)
1029cdca4f4eSDaniel Bristot de Oliveira params_u.sched_param = ¶ms->sched_param;
1030cdca4f4eSDaniel Bristot de Oliveira else
1031cdca4f4eSDaniel Bristot de Oliveira params_u.sched_param = NULL;
1032cdca4f4eSDaniel Bristot de Oliveira
1033cdca4f4eSDaniel Bristot de Oliveira params_u.cgroup_name = params->cgroup_name;
1034cdca4f4eSDaniel Bristot de Oliveira
1035cdca4f4eSDaniel Bristot de Oliveira retval = pthread_create(&timerlat_u, NULL, timerlat_u_dispatcher, ¶ms_u);
1036cdca4f4eSDaniel Bristot de Oliveira if (retval)
1037cdca4f4eSDaniel Bristot de Oliveira err_msg("Error creating timerlat user-space threads\n");
1038cdca4f4eSDaniel Bristot de Oliveira }
1039cdca4f4eSDaniel Bristot de Oliveira
1040cdbf7196SDaniel Bristot de Oliveira if (params->warmup > 0) {
1041cdbf7196SDaniel Bristot de Oliveira debug_msg("Warming up for %d seconds\n", params->warmup);
1042cdbf7196SDaniel Bristot de Oliveira sleep(params->warmup);
1043cdbf7196SDaniel Bristot de Oliveira }
1044cdbf7196SDaniel Bristot de Oliveira
1045cdbf7196SDaniel Bristot de Oliveira /*
1046cdbf7196SDaniel Bristot de Oliveira * Start the tracers here, after having set all instances.
1047cdbf7196SDaniel Bristot de Oliveira *
1048cdbf7196SDaniel Bristot de Oliveira * Let the trace instance start first for the case of hitting a stop
1049cdbf7196SDaniel Bristot de Oliveira * tracing while enabling other instances. The trace instance is the
1050cdbf7196SDaniel Bristot de Oliveira * one with most valuable information.
1051cdbf7196SDaniel Bristot de Oliveira */
1052cdbf7196SDaniel Bristot de Oliveira if (params->trace_output)
1053cdbf7196SDaniel Bristot de Oliveira trace_instance_start(&record->trace);
1054cdbf7196SDaniel Bristot de Oliveira if (!params->no_aa && aa != top)
1055cdbf7196SDaniel Bristot de Oliveira trace_instance_start(&aa->trace);
1056cdbf7196SDaniel Bristot de Oliveira trace_instance_start(trace);
1057cdbf7196SDaniel Bristot de Oliveira
1058cdbf7196SDaniel Bristot de Oliveira top->start_time = time(NULL);
1059cdbf7196SDaniel Bristot de Oliveira timerlat_top_set_signals(params);
1060cdbf7196SDaniel Bristot de Oliveira
1061a828cd18SDaniel Bristot de Oliveira while (!stop_tracing) {
1062a828cd18SDaniel Bristot de Oliveira sleep(params->sleep_time);
1063a828cd18SDaniel Bristot de Oliveira
10649fa48a24SDaniel Bristot de Oliveira if (params->aa_only && !trace_is_off(&top->trace, &record->trace))
10659fa48a24SDaniel Bristot de Oliveira continue;
10669fa48a24SDaniel Bristot de Oliveira
1067a828cd18SDaniel Bristot de Oliveira retval = tracefs_iterate_raw_events(trace->tep,
1068a828cd18SDaniel Bristot de Oliveira trace->inst,
1069a828cd18SDaniel Bristot de Oliveira NULL,
1070a828cd18SDaniel Bristot de Oliveira 0,
1071a828cd18SDaniel Bristot de Oliveira collect_registered_events,
1072a828cd18SDaniel Bristot de Oliveira trace);
1073a828cd18SDaniel Bristot de Oliveira if (retval < 0) {
1074a828cd18SDaniel Bristot de Oliveira err_msg("Error iterating on events\n");
1075a828cd18SDaniel Bristot de Oliveira goto out_top;
1076a828cd18SDaniel Bristot de Oliveira }
1077a828cd18SDaniel Bristot de Oliveira
1078a828cd18SDaniel Bristot de Oliveira if (!params->quiet)
1079a828cd18SDaniel Bristot de Oliveira timerlat_print_stats(params, top);
1080a828cd18SDaniel Bristot de Oliveira
108128d2160cSDaniel Bristot de Oliveira if (trace_is_off(&top->trace, &record->trace))
1082a828cd18SDaniel Bristot de Oliveira break;
1083a828cd18SDaniel Bristot de Oliveira
1084cdca4f4eSDaniel Bristot de Oliveira /* is there still any user-threads ? */
1085a23c05fdSDaniel Bristot de Oliveira if (params->user_workload) {
1086cdca4f4eSDaniel Bristot de Oliveira if (params_u.stopped_running) {
1087cdca4f4eSDaniel Bristot de Oliveira debug_msg("timerlat user space threads stopped!\n");
1088cdca4f4eSDaniel Bristot de Oliveira break;
1089cdca4f4eSDaniel Bristot de Oliveira }
1090cdca4f4eSDaniel Bristot de Oliveira }
1091cdca4f4eSDaniel Bristot de Oliveira }
1092cdca4f4eSDaniel Bristot de Oliveira
1093a23c05fdSDaniel Bristot de Oliveira if (params->user_workload && !params_u.stopped_running) {
1094cdca4f4eSDaniel Bristot de Oliveira params_u.should_run = 0;
1095cdca4f4eSDaniel Bristot de Oliveira sleep(1);
109675016ca3SDaniel Bristot de Oliveira }
1097a828cd18SDaniel Bristot de Oliveira
1098a828cd18SDaniel Bristot de Oliveira timerlat_print_stats(params, top);
1099a828cd18SDaniel Bristot de Oliveira
1100a828cd18SDaniel Bristot de Oliveira return_value = 0;
1101a828cd18SDaniel Bristot de Oliveira
110228d2160cSDaniel Bristot de Oliveira if (trace_is_off(&top->trace, &record->trace)) {
1103f1432cd2SAlexandre Vicenzi printf("rtla timerlat hit stop tracing\n");
11045def33dfSDaniel Bristot de Oliveira
11055def33dfSDaniel Bristot de Oliveira if (!params->no_aa)
11065def33dfSDaniel Bristot de Oliveira timerlat_auto_analysis(params->stop_us, params->stop_total_us);
11075def33dfSDaniel Bristot de Oliveira
1108a828cd18SDaniel Bristot de Oliveira if (params->trace_output) {
1109a828cd18SDaniel Bristot de Oliveira printf(" Saving trace to %s\n", params->trace_output);
1110a828cd18SDaniel Bristot de Oliveira save_trace_to_file(record->trace.inst, params->trace_output);
1111a828cd18SDaniel Bristot de Oliveira }
11129fa48a24SDaniel Bristot de Oliveira } else if (params->aa_only) {
11139fa48a24SDaniel Bristot de Oliveira /*
11149fa48a24SDaniel Bristot de Oliveira * If the trace did not stop with --aa-only, at least print the
11159fa48a24SDaniel Bristot de Oliveira * max known latency.
11169fa48a24SDaniel Bristot de Oliveira */
11179fa48a24SDaniel Bristot de Oliveira max_lat = tracefs_instance_file_read(trace->inst, "tracing_max_latency", NULL);
11189fa48a24SDaniel Bristot de Oliveira if (max_lat) {
11199fa48a24SDaniel Bristot de Oliveira printf(" Max latency was %s\n", max_lat);
11209fa48a24SDaniel Bristot de Oliveira free(max_lat);
11219fa48a24SDaniel Bristot de Oliveira }
1122a828cd18SDaniel Bristot de Oliveira }
1123a828cd18SDaniel Bristot de Oliveira
1124a828cd18SDaniel Bristot de Oliveira out_top:
1125c66552beSDaniel Bristot de Oliveira timerlat_aa_destroy();
11267d0dc957SDaniel Bristot de Oliveira if (dma_latency_fd >= 0)
11277d0dc957SDaniel Bristot de Oliveira close(dma_latency_fd);
112851d64c3aSDaniel Bristot de Oliveira trace_events_destroy(&record->trace, params->events);
112951d64c3aSDaniel Bristot de Oliveira params->events = NULL;
11302a6b52edSWan Jiabing out_free:
1131a828cd18SDaniel Bristot de Oliveira timerlat_free_top(top->data);
1132c66552beSDaniel Bristot de Oliveira if (aa && aa != top)
1133c66552beSDaniel Bristot de Oliveira osnoise_destroy_tool(aa);
1134a828cd18SDaniel Bristot de Oliveira osnoise_destroy_tool(record);
11354bbf59a9SDaniel Bristot de Oliveira osnoise_destroy_tool(top);
1136a828cd18SDaniel Bristot de Oliveira free(params);
1137a828cd18SDaniel Bristot de Oliveira out_exit:
1138a828cd18SDaniel Bristot de Oliveira exit(return_value);
1139a828cd18SDaniel Bristot de Oliveira }
1140