diff options
| author | Masami Hiramatsu <mhiramat@kernel.org> | 2024-05-09 10:29:21 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-05-25 16:16:18 +0200 |
| commit | 73b24eeb0eb3b349b33f8e2d8f5ef9c839b51fde (patch) | |
| tree | 36b960eaceeb35eb1fb035d66c56fe593f5647d5 /kernel/trace/trace.c | |
| parent | 7d00580499a839de612fa06340141c5ae1018fb2 (diff) | |
tracing: Use dyn_event framework for synthetic events
commit 7bbab38d07f3185fddf6fce126e2239010efdfce upstream.
Use dyn_event framework for synthetic events. This shows
synthetic events on "tracing/dynamic_events" file in addition
to tracing/synthetic_events interface.
User can also define new events via tracing/dynamic_events
with "s:" prefix. So, the new syntax is below;
s:[synthetic/]EVENT_NAME TYPE ARG; [TYPE ARG;]...
To remove events via tracing/dynamic_events, you can use
"-:" prefix as same as other events.
Link: http://lkml.kernel.org/r/154140861301.17322.15454611233735614508.stgit@devbox
Reviewed-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Tested-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Signed-off-by: George Guo <guodongtai@kylinos.cn>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel/trace/trace.c')
| -rw-r--r-- | kernel/trace/trace.c | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c index bacdbeffcc05..d409b6e2aa43 100644 --- a/kernel/trace/trace.c +++ b/kernel/trace/trace.c @@ -4681,6 +4681,9 @@ static const char readme_msg[] = "\t accepts: event-definitions (one definition per line)\n" "\t Format: p[:[<group>/]<event>] <place> [<args>]\n" "\t r[maxactive][:[<group>/]<event>] <place> [<args>]\n" +#ifdef CONFIG_HIST_TRIGGERS + "\t s:[synthetic/]<event> <field> [<field>]\n" +#endif "\t -:[<group>/]<event>\n" #ifdef CONFIG_KPROBE_EVENTS "\t place: [<module>:]<symbol>[+<offset>]|<memaddr>\n" @@ -4694,6 +4697,11 @@ static const char readme_msg[] = "\t $stack<index>, $stack, $retval, $comm\n" "\t type: s8/16/32/64, u8/16/32/64, x8/16/32/64, string,\n" "\t b<bit-width>@<bit-offset>/<container-size>\n" +#ifdef CONFIG_HIST_TRIGGERS + "\t field: <stype> <name>;\n" + "\t stype: u8/u16/u32/u64, s8/s16/s32/s64, pid_t,\n" + "\t [unsigned] char/int/long\n" +#endif #endif " events/\t\t- Directory containing all trace event subsystems:\n" " enable\t\t- Write 0/1 to enable/disable tracing of all events\n" |