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| author | Steven Rostedt (Red Hat) <rostedt@goodmis.org> | 2013-03-12 16:49:18 +0100 |
|---|---|---|
| committer | Steven Rostedt <rostedt@goodmis.org> | 2013-03-15 05:36:01 +0100 |
| commit | 77fd5c15e3216b901be69047ca43b05ae9099951 (patch) | |
| tree | 1790b9bacd1d371cf03902efaf99cdc9d08abdec /ipc | |
| parent | tracing: Add alloc/free_snapshot() to replace duplicate code (diff) | |
| download | linux-77fd5c15e3216b901be69047ca43b05ae9099951.tar.xz linux-77fd5c15e3216b901be69047ca43b05ae9099951.zip | |
tracing: Add snapshot trigger to function probes
echo 'schedule:snapshot:1' > /debug/tracing/set_ftrace_filter
This will cause the scheduler to trigger a snapshot the next time
it's called (you can use any function that's not called by NMI).
Even though it triggers only once, you still need to remove it with:
echo '!schedule:snapshot:0' > /debug/tracing/set_ftrace_filter
The :1 can be left off for the first command:
echo 'schedule:snapshot' > /debug/tracing/set_ftrace_filter
But this will cause all calls to schedule to trigger a snapshot.
This must be removed without the ':0'
echo '!schedule:snapshot' > /debug/tracing/set_ftrace_filter
As adding a "count" is a different operation (internally).
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Diffstat (limited to 'ipc')
0 files changed, 0 insertions, 0 deletions