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/linux/tools/perf/
H A Dbuiltin-ftrace.c264 static void reset_tracing_options(struct perf_ftrace *ftrace __maybe_unused) in reset_tracing_options()
277 static int reset_tracing_files(struct perf_ftrace *ftrace __maybe_unused) in reset_tracing_files()
298 reset_tracing_options(ftrace); in reset_tracing_files()
302 static int set_tracing_pid(struct perf_ftrace *ftrace) in set_tracing_pid() argument
307 if (target__has_cpu(&ftrace->target)) in set_tracing_pid()
310 for (i = 0; i < perf_thread_map__nr(ftrace->evlist->core.threads); i++) { in set_tracing_pid()
312 perf_thread_map__pid(ftrace->evlist->core.threads, i)); in set_tracing_pid()
344 static int set_tracing_cpu(struct perf_ftrace *ftrace) in set_tracing_cpu() argument
346 struct perf_cpu_map *cpumap = ftrace->evlist->core.user_requested_cpus; in set_tracing_cpu()
348 if (!target__has_cpu(&ftrace->target)) in set_tracing_cpu()
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/linux/tools/testing/selftests/ftrace/test.d/direct/
H A Dftrace-direct.tc5 rmmod ftrace-direct ||:
6 if ! modprobe ftrace-direct ; then
16 rmmod ftrace-direct
23 modprobe ftrace-direct
24 rmmod ftrace-direct
29 modprobe ftrace-direct
31 rmmod ftrace-direct
34 modprobe ftrace-direct
37 rmmod ftrace-direct
40 modprobe ftrace-direct
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H A Dkprobe-direct.tc6 rmmod ftrace-direct ||:
7 if ! modprobe ftrace-direct ; then
17 rmmod ftrace-direct
23 modprobe ftrace-direct
29 rmmod ftrace-direct
74 modprobe ftrace-direct-too
78 rmmod ftrace-direct-too
/linux/tools/perf/util/
H A Dbpf_ftrace.c8 #include "util/ftrace.h"
20 int perf_ftrace__latency_prepare_bpf(struct perf_ftrace *ftrace) in perf_ftrace__latency_prepare_bpf()
26 if (!list_is_singular(&ftrace->filters)) { in perf_ftrace__latency_prepare_bpf()
28 list_empty(&ftrace->filters) ? "No" : "Too many"); in perf_ftrace__latency_prepare_bpf()
32 func = list_first_entry(&ftrace->filters, struct filter_entry, list); in perf_ftrace__latency_prepare_bpf()
40 skel->rodata->bucket_range = ftrace->bucket_range; in perf_ftrace__latency_prepare_bpf()
41 skel->rodata->min_latency = ftrace->min_latency; in perf_ftrace__latency_prepare_bpf()
44 if (ftrace->target.cpu_list) { in perf_ftrace__latency_prepare_bpf()
45 ncpus = perf_cpu_map__nr(ftrace->evlist->core.user_requested_cpus); in perf_ftrace__latency_prepare_bpf()
50 if (target__has_task(&ftrace in perf_ftrace__latency_prepare_bpf()
19 perf_ftrace__latency_prepare_bpf(struct perf_ftrace * ftrace) perf_ftrace__latency_prepare_bpf() argument
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H A Dftrace.h46 int perf_ftrace__latency_prepare_bpf(struct perf_ftrace *ftrace);
47 int perf_ftrace__latency_start_bpf(struct perf_ftrace *ftrace);
48 int perf_ftrace__latency_stop_bpf(struct perf_ftrace *ftrace);
49 int perf_ftrace__latency_read_bpf(struct perf_ftrace *ftrace,
51 int perf_ftrace__latency_cleanup_bpf(struct perf_ftrace *ftrace);
56 perf_ftrace__latency_prepare_bpf(struct perf_ftrace *ftrace __maybe_unused)
62 perf_ftrace__latency_start_bpf(struct perf_ftrace *ftrace __maybe_unused)
68 perf_ftrace__latency_stop_bpf(struct perf_ftrace *ftrace __maybe_unused)
74 perf_ftrace__latency_read_bpf(struct perf_ftrace *ftrace __maybe_unused, in perf_ftrace__latency_read_bpf()
82 perf_ftrace__latency_cleanup_bpf(struct perf_ftrace *ftrace __maybe_unuse
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/linux/Documentation/trace/
H A Dboottime-trace.rst13 device initialization with full features of ftrace including per-event
23 boot config file [1]_. All options are under "ftrace." or "kernel."
40 Dump ftrace on Oops. If MODE = 1 or omitted, dump trace buffer
59 These options can be used for each instance including global ftrace node.
61 ftrace.[instance.INSTANCE.]options = OPT1[, OPT2[...]]
62 Enable given ftrace options.
64 ftrace.[instance.INSTANCE.]tracing_on = 0|1
68 ftrace.[instance.INSTANCE.]trace_clock = CLOCK
69 Set given CLOCK to ftrace's trace_clock.
71 ftrace.[instance.INSTANCE.]buffer_size = SIZE
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H A Dftrace-uses.rst2 Using ftrace to hook to functions
15 The ftrace infrastructure was originally created to attach callbacks to the
19 how to use ftrace to implement your own function callbacks.
22 The ftrace context
41 is used to tell ftrace what function should be called as the callback
43 ftrace to handle.
46 an ftrace_ops with ftrace:
68 #include <linux/ftrace.h>
108 at the start of the function where ftrace was tracing. Otherwise it
164 The ftrace FLAGS
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/linux/samples/ftrace/
H A DMakefile3 obj-$(CONFIG_SAMPLE_FTRACE_DIRECT) += ftrace-direct.o
4 obj-$(CONFIG_SAMPLE_FTRACE_DIRECT) += ftrace-direct-too.o
5 obj-$(CONFIG_SAMPLE_FTRACE_DIRECT) += ftrace-direct-modify.o
6 obj-$(CONFIG_SAMPLE_FTRACE_DIRECT_MULTI) += ftrace-direct-multi.o
7 obj-$(CONFIG_SAMPLE_FTRACE_DIRECT_MULTI) += ftrace-direct-multi-modify.o
8 obj-$(CONFIG_SAMPLE_FTRACE_OPS) += ftrace-ops.o
/linux/tools/testing/ktest/examples/bootconfigs/
H A Dboottrace.bconf1 ftrace.event {
33 ftrace.instance {
36 ftrace.filters = "user_*"
45 ftrace.filters = "kernel_*"
51 ftrace.alloc_snapshot
57 ftrace = function
/linux/tools/perf/Documentation/
H A Dperf-ftrace.txt1 perf-ftrace(1)
6 perf-ftrace - simple wrapper for kernel's ftrace functionality
12 'perf ftrace' {trace|latency|profile} <command>
16 The 'perf ftrace' command provides a collection of subcommands which use
17 kernel's ftrace infrastructure.
19 'perf ftrace trace' is a simple wrapper of the ftrace. It only supports
23 'perf ftrace latency' calculates execution latency of a given function
26 'perf ftrace profil
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/linux/samples/
H A DMakefile27 obj-$(CONFIG_SAMPLE_FTRACE_DIRECT) += ftrace/
28 obj-$(CONFIG_SAMPLE_FTRACE_DIRECT_MULTI) += ftrace/
29 obj-$(CONFIG_SAMPLE_FTRACE_OPS) += ftrace/
30 obj-$(CONFIG_SAMPLE_TRACE_ARRAY) += ftrace/
/linux/tools/testing/selftests/ftrace/test.d/trigger/
H A Dtrigger-trace-marker-synthetic.tc15 echo 'hist:keys=common_pid:ts0=common_timestamp.usecs if buf == "start"' > events/ftrace/print/trig…
16 …tamp.usecs-$ts0:onmatch(ftrace.print).latency($lat) if buf == "end"' >> events/ftrace/print/trigger
21 cnt=`grep 'hitcount: *1$' events/ftrace/print/hist | wc -l`
H A Dtrigger-trace-marker-hist.tc14 echo 'hist:keys=common_pid' > events/ftrace/print/trigger
16 grep 'hitcount: *10$' events/ftrace/print/hist > /dev/null || \
H A Dtrigger-trace-marker-synthetic-kernel.tc16 …ommon_timestamp.usecs-$ts0:onmatch(sched.sched_waking).latency($lat)' > events/ftrace/print/trigger
21 grep 'hitcount: *1$' events/ftrace/print/hist > /dev/null || \
/linux/arch/sh/kernel/
H A DMakefile42 obj-$(CONFIG_DYNAMIC_FTRACE) += ftrace.o
43 obj-$(CONFIG_FTRACE_SYSCALLS) += ftrace.o
44 obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += ftrace.o
/linux/tools/testing/selftests/rcutorture/bin/
H A Dparse-console.sh188 extract_ftrace_from_console $file > $file.ftrace
189 if [ ! -s $file.ftrace ]; then
190 rm -f $file.ftrace
/linux/Documentation/features/debug/kprobes-on-ftrace/
H A Darch-support.txt2 # Feature name: kprobes-on-ftrace
4 # description: arch supports combined kprobes and ftrace live patching
/linux/Documentation/livepatch/
H A Dlivepatch.rst43 Most of these problems are solved by using the dynamic ftrace framework as
44 a base. A Kprobe is registered as a ftrace handler when the function entry
46 a live patch is called with the help of a custom ftrace handler. But there are
327 ftrace handler is registered\ [#]_. This stage is indicated by a value of '1'
336 Note that functions might be patched multiple times. The ftrace handler
339 The right implementation is selected by the ftrace handler, see
356 the ftrace handler is unregistered and the struct klp_ops is
378 patch are removed from the corresponding struct klp_ops. The ftrace handler
415 Livepatch is based on the dynamic ftrace. In particular, functions
416 implementing ftrace or the livepatch ftrace handler could not be
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/linux/tools/power/pm-graph/config/
H A Dfreeze.cfg25 # output folder for html, ftrace, and dmesg. Use {date} and {time} for current values
33 # add the dmesg and ftrace log to the html output (default: false)
76 # gather detailed ftrace callgraph data on all timeline events (default: false)
H A Dstandby.cfg25 # output folder for html, ftrace, and dmesg. Use {date} and {time} for current values
33 # add the dmesg and ftrace log to the html output (default: false)
76 # gather detailed ftrace callgraph data on all timeline events (default: false)
H A Dstandby-callgraph.cfg26 # output folder for html, ftrace, and dmesg. Use {date} and {time} for current values
34 # add the dmesg and ftrace log to the html output (default: false)
77 # gather detailed ftrace callgraph data on all timeline events (default: false)
/linux/tools/bootconfig/scripts/
H A Dbconf2ftrace.sh66 . `dirname $0`/ftrace.sh
258 set_array_of ${instance}.ftrace.filters \
260 set_array_of ${instance}.ftrace.notrace \
/linux/arch/powerpc/kernel/
H A DMakefile140 obj-$(CONFIG_KPROBES_ON_FTRACE) += kprobes-ftrace.o
187 GCOV_PROFILE_kprobes-ftrace.o := n
188 KCOV_INSTRUMENT_kprobes-ftrace.o := n
189 KCSAN_SANITIZE_kprobes-ftrace.o := n
190 UBSAN_SANITIZE_kprobes-ftrace.o := n
/linux/tools/power/pm-graph/
H A DREADME52 and will capture dmesg and ftrace data. This data is transformed into a set of
106 patch must be applied to enable ftrace data:
141 files in subdirectory: suspend-mmddyy-HHMMSS. The ftrace file can
146 raw ftrace output: <hostname>_<mode>_ftrace.txt
269 dmesg and ftrace logs. This will require a significant amount of time if
284 Each test subfolder contains the dmesg/ftrace logs and/or the html timeline
361 # Add Logs: add the dmesg and ftrace log to the html output (def: false)
391 # Callgraph: gather ftrace callgraph data on all timeline events (def: false)
547 to set them in ftrace. It will then print out success or fail for you.
559 is ftrace supported: YES
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/linux/tools/testing/selftests/ftrace/
H A DREADME3 This is a collection of testcases for ftrace tracing feature in the Linux
4 kernel. Since ftrace exports interfaces via the debugfs, we just need
7 Running the ftrace testcases

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