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authorChangbin Du <changbin.du@gmail.com>2020-08-08 10:31:39 +0800
committerArnaldo Carvalho de Melo <acme@redhat.com>2020-08-14 09:34:52 -0300
commit42145d71ddf369a536940a1b0d63b9aef6468516 (patch)
tree01f75dab965ce98a763a8517db7e1fa3448bf13c /tools
parent6555c2f6db2196ef1b6d7149e7d342d0ba2ec57e (diff)
perf ftrace: Add option --tid to filter by thread id
This allows us to trace single thread instead of the whole process. Signed-off-by: Changbin Du <changbin.du@gmail.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt (VMware) <rostedt@goodmis.org> Link: http://lore.kernel.org/lkml/20200808023141.14227-17-changbin.du@gmail.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/Documentation/perf-ftrace.txt3
-rw-r--r--tools/perf/builtin-ftrace.c3
2 files changed, 6 insertions, 0 deletions
diff --git a/tools/perf/Documentation/perf-ftrace.txt b/tools/perf/Documentation/perf-ftrace.txt
index 29c684b3b3fd..78358af9a1c4 100644
--- a/tools/perf/Documentation/perf-ftrace.txt
+++ b/tools/perf/Documentation/perf-ftrace.txt
@@ -39,6 +39,9 @@ OPTIONS
--pid=::
Trace on existing process id (comma separated list).
+--tid=::
+ Trace on existing thread id (comma separated list).
+
-D::
--delay::
Time (ms) to wait before starting tracing after program start.
diff --git a/tools/perf/builtin-ftrace.c b/tools/perf/builtin-ftrace.c
index 5f9a9ebea0a2..13abb737fd12 100644
--- a/tools/perf/builtin-ftrace.c
+++ b/tools/perf/builtin-ftrace.c
@@ -812,6 +812,9 @@ 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"),
+ /* TODO: Add short option -t after -t/--tracer can be removed. */
+ OPT_STRING(0, "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,