1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> 4 * 5 * Refactored from builtin-top.c, see that files for further copyright notes. 6 */ 7 8 #include "event.h" 9 #include "evlist.h" 10 #include "evsel.h" 11 #include "parse-events.h" 12 #include "symbol.h" 13 #include "top.h" 14 #include "util.h" 15 #include <inttypes.h> 16 17 #define SNPRINTF(buf, size, fmt, args...) \ 18 ({ \ 19 size_t r = snprintf(buf, size, fmt, ## args); \ 20 r > size ? size : r; \ 21 }) 22 23 size_t perf_top__header_snprintf(struct perf_top *top, char *bf, size_t size) 24 { 25 float samples_per_sec; 26 float ksamples_per_sec; 27 float esamples_percent; 28 struct record_opts *opts = &top->record_opts; 29 struct target *target = &opts->target; 30 size_t ret = 0; 31 int nr_cpus; 32 33 if (top->samples) { 34 samples_per_sec = top->samples / top->delay_secs; 35 ksamples_per_sec = top->kernel_samples / top->delay_secs; 36 esamples_percent = (100.0 * top->exact_samples) / top->samples; 37 } else { 38 samples_per_sec = ksamples_per_sec = esamples_percent = 0.0; 39 } 40 41 if (!perf_guest) { 42 float ksamples_percent = 0.0; 43 44 if (samples_per_sec) 45 ksamples_percent = (100.0 * ksamples_per_sec) / 46 samples_per_sec; 47 ret = SNPRINTF(bf, size, 48 " PerfTop:%8.0f irqs/sec kernel:%4.1f%%" 49 " exact: %4.1f%% lost: %" PRIu64 "/%" PRIu64 " drop: %" PRIu64 "/%" PRIu64 " [", 50 samples_per_sec, ksamples_percent, esamples_percent, 51 top->lost, top->lost_total, top->drop, top->drop_total); 52 } else { 53 float us_samples_per_sec = top->us_samples / top->delay_secs; 54 float guest_kernel_samples_per_sec = top->guest_kernel_samples / top->delay_secs; 55 float guest_us_samples_per_sec = top->guest_us_samples / top->delay_secs; 56 57 ret = SNPRINTF(bf, size, 58 " PerfTop:%8.0f irqs/sec kernel:%4.1f%% us:%4.1f%%" 59 " guest kernel:%4.1f%% guest us:%4.1f%%" 60 " exact: %4.1f%% [", samples_per_sec, 61 100.0 - (100.0 * ((samples_per_sec - ksamples_per_sec) / 62 samples_per_sec)), 63 100.0 - (100.0 * ((samples_per_sec - us_samples_per_sec) / 64 samples_per_sec)), 65 100.0 - (100.0 * ((samples_per_sec - 66 guest_kernel_samples_per_sec) / 67 samples_per_sec)), 68 100.0 - (100.0 * ((samples_per_sec - 69 guest_us_samples_per_sec) / 70 samples_per_sec)), 71 esamples_percent); 72 } 73 74 if (top->evlist->core.nr_entries == 1) { 75 struct evsel *first = evlist__first(top->evlist); 76 ret += SNPRINTF(bf + ret, size - ret, "%" PRIu64 "%s ", 77 (uint64_t)first->core.attr.sample_period, 78 opts->freq ? "Hz" : ""); 79 } 80 81 ret += SNPRINTF(bf + ret, size - ret, "%s", evsel__name(top->sym_evsel)); 82 83 ret += SNPRINTF(bf + ret, size - ret, "], "); 84 85 if (target->pid) 86 ret += SNPRINTF(bf + ret, size - ret, " (target_pid: %s", 87 target->pid); 88 else if (target->tid) 89 ret += SNPRINTF(bf + ret, size - ret, " (target_tid: %s", 90 target->tid); 91 else if (target->uid_str != NULL) 92 ret += SNPRINTF(bf + ret, size - ret, " (uid: %s", 93 target->uid_str); 94 else 95 ret += SNPRINTF(bf + ret, size - ret, " (all"); 96 97 nr_cpus = perf_cpu_map__nr(top->evlist->core.user_requested_cpus); 98 if (target->cpu_list) 99 ret += SNPRINTF(bf + ret, size - ret, ", CPU%s: %s)", 100 nr_cpus > 1 ? "s" : "", 101 target->cpu_list); 102 else { 103 if (target->tid) 104 ret += SNPRINTF(bf + ret, size - ret, ")"); 105 else 106 ret += SNPRINTF(bf + ret, size - ret, ", %d CPU%s)", 107 nr_cpus, nr_cpus > 1 ? "s" : ""); 108 } 109 110 perf_top__reset_sample_counters(top); 111 return ret; 112 } 113 114 void perf_top__reset_sample_counters(struct perf_top *top) 115 { 116 top->samples = top->us_samples = top->kernel_samples = 117 top->exact_samples = top->guest_kernel_samples = 118 top->guest_us_samples = top->lost = top->drop = 0; 119 } 120