Messages in this thread Patch in this message | | | From | Changbin Du <> | Subject | [PATCH v4 03/17] perf ftrace: add option -t/--tid to filter by thread id | Date | Fri, 10 Jul 2020 21:43:08 +0800 |
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This allows us to trace single thread instead of the whole process.
Signed-off-by: Changbin Du <changbin.du@gmail.com> --- tools/perf/Documentation/perf-ftrace.txt | 4 ++++ tools/perf/builtin-ftrace.c | 2 ++ 2 files changed, 6 insertions(+)
diff --git a/tools/perf/Documentation/perf-ftrace.txt b/tools/perf/Documentation/perf-ftrace.txt index d79560dea19f..e204bf6d50d8 100644 --- a/tools/perf/Documentation/perf-ftrace.txt +++ b/tools/perf/Documentation/perf-ftrace.txt @@ -38,6 +38,10 @@ OPTIONS --pid=:: Trace on existing process id (comma separated list). +-t:: +--tid=:: + Trace on existing thread id (comma separated list). + -a:: --all-cpus:: Force system-wide collection. Scripts run without a <command> diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c index 244cc8e6bd60..1188b82c6541 100644 --- a/tools/perf/builtin-ftrace.c +++ b/tools/perf/builtin-ftrace.c @@ -515,6 +515,8 @@ int cmd_ftrace(int argc, const char **argv) "Show available functions to filter"), OPT_STRING('p', "pid", &ftrace.target.pid, "pid", "trace on existing process id"), + OPT_STRING('t', "tid", &ftrace.target.tid, "tid", + "trace on existing thread id (exclusive to --pid)"), OPT_INCR('v', "verbose", &verbose, "be more verbose"), OPT_BOOLEAN('a', "all-cpus", &ftrace.target.system_wide, -- 2.25.1
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