From: Changbin Du Date: Sat, 8 Aug 2020 02:31:39 +0000 (+0800) Subject: perf ftrace: Add option --tid to filter by thread id X-Git-Tag: v5.15~3070^2~6 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=42145d71ddf369a536940a1b0d63b9aef6468516;p=platform%2Fkernel%2Flinux-starfive.git 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 Acked-by: Namhyung Kim Cc: Jiri Olsa Cc: Peter Zijlstra Cc: Steven Rostedt (VMware) Link: http://lore.kernel.org/lkml/20200808023141.14227-17-changbin.du@gmail.com Signed-off-by: Arnaldo Carvalho de Melo --- diff --git a/tools/perf/Documentation/perf-ftrace.txt b/tools/perf/Documentation/perf-ftrace.txt index 29c684b..78358af 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 5f9a9eb..13abb73 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,