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| author | Tom Zanussi <tom.zanussi@linux.intel.com> | 2019-02-14 00:42:46 +0100 |
|---|---|---|
| committer | Steven Rostedt (VMware) <rostedt@goodmis.org> | 2019-02-20 19:51:07 +0100 |
| commit | a3785b7eca8fd45c7c39f2ddfcd67368af30c1b4 (patch) | |
| tree | 7090f2e113486f00c6f26da049ce0e581eceb162 /Documentation/trace | |
| parent | tracing: Add conditional snapshot (diff) | |
| download | linux-a3785b7eca8fd45c7c39f2ddfcd67368af30c1b4.tar.xz linux-a3785b7eca8fd45c7c39f2ddfcd67368af30c1b4.zip | |
tracing: Add hist trigger snapshot() action
Add support for hist:handlerXXX($var).snapshot(), which will take a
snapshot of the current trace buffer whenever handlerXXX is hit.
As a first user, this also adds snapshot() action support for the
onmax() handler i.e. hist:onmax($var).snapshot().
Also, the hist trigger key printing is moved into a separate function
so the snapshot() action can print a histogram key outside the
histogram display - add and use hist_trigger_print_key() for that
purpose.
Link: http://lkml.kernel.org/r/2f1a952c0dcd8aca8702ce81269581a692396d45.1550100284.git.tom.zanussi@linux.intel.com
Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
Diffstat (limited to 'Documentation/trace')
0 files changed, 0 insertions, 0 deletions