path: root/tools/perf/builtin-probe.c
diff options
authorMasami Hiramatsu <>2011-06-27 16:27:51 +0900
committerSteven Rostedt <>2011-07-15 16:25:12 -0400
commit14a8fd7ceea6915c613746203d6e9a2bf273f16c (patch)
tree738803bc847efa3a17e9076922f06ceaca20d8f0 /tools/perf/builtin-probe.c
parent190b57fcb9c5fed5414935a174094f534fc510bc (diff)
perf probe: Support adding probes on offline kernel modules
Support adding probes on offline kernel modules. This enables perf-probe to trace kernel-module init functions via perf-probe. If user gives the path of module with -m option, perf-probe expects the module is offline. This feature works with --add, --funcs, and --vars. E.g) # perf probe -m /lib/modules/`uname -r`/kernel/fs/btrfs/btrfs.ko \ -a "extent_io_init:5 extent_state_cache" Add new events: probe:extent_io_init (on extent_io_init:5 with extent_state_cache) probe:extent_io_init_1 (on extent_io_init:5 with extent_state_cache) You can now use it on all perf tools, such as: perf record -e probe:extent_io_init_1 -aR sleep 1 Signed-off-by: Masami Hiramatsu <> Cc: Peter Zijlstra <> Cc: Frederic Weisbecker <> Cc: Paul Mackerras <> Cc: Ingo Molnar <> Cc: Arnaldo Carvalho de Melo <> Link: Signed-off-by: Steven Rostedt <>
Diffstat (limited to 'tools/perf/builtin-probe.c')
1 files changed, 2 insertions, 1 deletions
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index 2c0e64d0b4aa..5f2a5c7046df 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -242,7 +242,8 @@ static const struct option options[] = {
OPT_STRING('s', "source", &symbol_conf.source_prefix,
"directory", "path to kernel source"),
OPT_STRING('m', "module", &params.target_module,
- "modname", "target module name"),
+ "modname|path",
+ "target module name (for online) or path (for offline)"),
OPT_INTEGER('\0', "max-probes", &params.max_probe_points,