diff options
| author | Jamie Gennis <jgennis@google.com> | 2012-11-21 15:04:25 -0800 |
|---|---|---|
| committer | John Stultz <john.stultz@linaro.org> | 2016-02-16 13:53:27 -0800 |
| commit | 6019e59489e288c1eb7276387ea45d8ceb69f6b2 (patch) | |
| tree | 3dbc140cf1c8eec9c9c95e4021968fe4e49890ac /kernel/trace/trace.h | |
| parent | e2dba5ee5fa27dace155194163ce970c63e6fe7a (diff) | |
trace: Add an option to show tgids in trace output
The tgids are tracked along side the saved_cmdlines tracking, and can be
included in trace output by enabling the 'print-tgid' trace option. This is
useful when doing post-processing of the trace data, as it allows events to be
grouped by tgid.
Change-Id: I52ed04c3a8ca7fddbb868b792ce5d21ceb76250e
Signed-off-by: Jamie Gennis <jgennis@google.com>
Diffstat (limited to 'kernel/trace/trace.h')
| -rw-r--r-- | kernel/trace/trace.h | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h index 919d9d07686f..e1265f95457f 100644 --- a/kernel/trace/trace.h +++ b/kernel/trace/trace.h @@ -656,6 +656,7 @@ static inline void __trace_stack(struct trace_array *tr, unsigned long flags, extern cycle_t ftrace_now(int cpu); extern void trace_find_cmdline(int pid, char comm[]); +extern int trace_find_tgid(int pid); #ifdef CONFIG_DYNAMIC_FTRACE extern unsigned long ftrace_update_tot_cnt; @@ -970,7 +971,8 @@ extern int trace_get_user(struct trace_parser *parser, const char __user *ubuf, FUNCTION_FLAGS \ FGRAPH_FLAGS \ STACK_FLAGS \ - BRANCH_FLAGS + BRANCH_FLAGS \ + C(TGID, "print-tgid"), /* * By defining C, we can make TRACE_FLAGS a list of bit names |