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d23477637a
linux/tools/perf
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Namhyung Kim d23477637a perf offcpu: Track child processes 
When -p option used or a workload is given, it needs to handle child
processes.  The perf_event can inherit those task events
automatically.  We can add a new BPF program in task_newtask
tracepoint to track child processes.

Before:
  $ sudo perf record --off-cpu -- perf bench sched messaging
  $ sudo perf report --stat | grep -A1 offcpu
  offcpu-time stats:
            SAMPLE events:        1

After:
  $ sudo perf record -a --off-cpu -- perf bench sched messaging
  $ sudo perf report --stat | grep -A1 offcpu
  offcpu-time stats:
            SAMPLE events:      856

Signed-off-by: Namhyung Kim <namhyung@kernel.org>
Cc: Blake Jones <blakejones@google.com>
Cc: Hao Luo <haoluo@google.com>
Cc: Ian Rogers <irogers@google.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Milian Wolff <milian.wolff@kdab.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: bpf@vger.kernel.org
Link: https://lore.kernel.org/r/20220811185456.194721-4-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2022-08-11 17:57:34 -03:00
..
arch perf tools: Do not pass NULL to parse_events() 2022-08-10 14:30:09 -03:00
bench Merge remote-tracking branch 'torvalds/master' into perf/core 2022-05-23 09:32:49 -03:00
dlfilters perf dlfilter: Drop unused variable 2021-12-16 12:18:11 -03:00
Documentation perf script: Fix reference to perf insert instead of perf inject 2022-08-10 10:44:02 -03:00
examples/bpf
include perf dlfilter: Add machine_pid and vcpu 2022-07-20 11:08:13 -03:00
jvmti
pmu-events perf list: Add PMU pai_crypto event description for IBM z16 2022-08-10 10:44:02 -03:00
python perf python: Convert tracepoint.py example to python3 2022-04-01 16:19:35 -03:00
scripts Merge remote-tracking branch 'torvalds/master' into perf/core 2022-08-01 08:59:31 -03:00
tests perf tools: Do not pass NULL to parse_events() 2022-08-10 14:30:09 -03:00
trace perf trace beauty: Fix generation of errno id->str table on ALT Linux 2022-06-26 12:32:55 -03:00
ui perf annotate: Avoid TUI crash when navigating in the annotation of recursive functions 2022-01-10 15:47:30 -03:00
util perf offcpu: Track child processes 2022-08-11 17:57:34 -03:00
.gitignore perf tools: Delete perf-with-kcore.sh script 2022-04-27 20:11:26 -03:00
Build perf kwork: New tool to trace time properties of kernel work (such as softirq, and workqueue) 2022-07-26 16:01:24 -03:00
builtin-annotate.c perf gtk: Only support --gtk if compiled in 2022-07-20 11:09:11 -03:00
builtin-bench.c perf bench: Add breakpoint benchmarks 2022-05-13 11:00:38 -03:00
builtin-buildid-cache.c perf record: Disable debuginfod by default 2022-01-15 17:41:25 -03:00
builtin-buildid-list.c perf buildid-list: Add a "-m" option to show kernel and modules build-ids 2022-07-18 16:35:34 -03:00
builtin-c2c.c perf c2c: Fix sorting in percent_rmt_hitm_cmp() 2022-06-03 21:40:15 +02:00
builtin-config.c
builtin-daemon.c perf daemon: Remove duplicate sys/file.h include 2021-10-08 15:14:50 -03:00
builtin-data.c perf data: Don't mention --to-ctf if it's not supported 2022-02-22 21:23:08 -03:00
builtin-diff.c perf tools: Remove repipe argument from perf_session__new() 2021-08-02 10:06:51 -03:00
builtin-evlist.c perf tools: Remove repipe argument from perf_session__new() 2021-08-02 10:06:51 -03:00
builtin-ftrace.c perf evlist: Rename cpus to user_requested_cpus 2022-04-01 16:19:35 -03:00
builtin-help.c
builtin-inject.c perf inject: Fix spelling mistake "theads" -> "threads" 2022-07-26 16:31:54 -03:00
builtin-kallsyms.c
builtin-kmem.c perf tools: Enhance the matching of sub-commands abbreviations 2022-03-26 10:55:57 -03:00
builtin-kvm.c perf kvm: Fix subcommand matching error 2022-08-10 10:44:02 -03:00
builtin-kwork.c perf kwork: Implement BPF trace 2022-07-26 16:31:54 -03:00
builtin-list.c perf parse-events: Break out tracepoint and printing 2022-08-02 16:32:26 -03:00
builtin-lock.c perf lock: Print the number of lost entries for BPF 2022-08-02 18:03:31 -03:00
builtin-mem.c perf tools: Enhance the matching of sub-commands abbreviations 2022-03-26 10:55:57 -03:00
builtin-probe.c perf namespaces: Add functions to access nsinfo 2022-02-11 14:31:22 -03:00
builtin-record.c perf record: Add finished init event 2022-06-23 11:54:22 -03:00
builtin-report.c perf gtk: Only support --gtk if compiled in 2022-07-20 11:09:11 -03:00
builtin-sched.c perf sched latency: Fix subcommand matching error 2022-08-10 10:44:02 -03:00
builtin-script.c perf script: Add machine_pid and vcpu 2022-07-20 11:08:13 -03:00
builtin-stat.c perf stat: Add JSON output option 2022-08-10 10:43:29 -03:00
builtin-timechart.c perf parse-events: Break out tracepoint and printing 2022-08-02 16:32:26 -03:00
builtin-top.c perf evlist: Rename cpus to user_requested_cpus 2022-04-01 16:19:35 -03:00
builtin-trace.c perf parse-events: Break out tracepoint and printing 2022-08-02 16:32:26 -03:00
builtin-version.c perf version: Add HAVE_DEBUGINFOD_SUPPORT to built-in features 2022-04-20 13:32:09 -03:00
builtin.h perf kwork: New tool to trace time properties of kernel work (such as softirq, and workqueue) 2022-07-26 16:01:24 -03:00
check-headers.sh tools arm64: Import cputype.h 2022-03-26 10:53:45 -03:00
command-list.txt perf kwork: New tool to trace time properties of kernel work (such as softirq, and workqueue) 2022-07-26 16:01:24 -03:00
CREDITS
design.txt perf design.txt: Synchronize the definition of enum perf_hw_id with code 2021-11-13 18:11:50 -03:00
Makefile
Makefile.config perf build: Remove FEATURE_CHECK_LDFLAGS-disassembler-{four-args,init-styled} setting 2022-08-10 10:44:01 -03:00
Makefile.perf perf test: JSON format checking 2022-08-10 10:44:01 -03:00
MANIFEST perf MANIFEST: Add bpftool files to allow building with BUILD_BPF_SKEL=1 2021-11-07 15:39:28 -03:00
perf-archive.sh
perf-completion.sh
perf-iostat.sh
perf-read-vdso.c
perf-sys.h
perf.c perf kwork: New tool to trace time properties of kernel work (such as softirq, and workqueue) 2022-07-26 16:01:24 -03:00
perf.h