Messages in this thread | | | Date | Tue, 3 Nov 2015 17:55:55 +0900 | From | Namhyung Kim <> | Subject | Re: [PATCH v11 22/28] tracing: Add enable_hist/disable_hist triggers |
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On Thu, Oct 22, 2015 at 01:14:26PM -0500, Tom Zanussi wrote: > Similar to enable_event/disable_event triggers, these triggers enable > and disable the aggregation of events into maps rather than enabling > and disabling their writing into the trace buffer. > > They can be used to automatically start and stop hist triggers based > on a matching filter condition. > > If there's a paused hist trigger on system:event, the following would > start it when the filter condition was hit: > > # echo enable_hist:system:event [ if filter] > event/trigger > > And the following would disable a running system:event hist trigger: > > # echo disable_hist:system:event [ if filter] > event/trigger
What about named hist triggers? Maybe worth adding "enable/disable_hist_name" too?
Thanks, Namhyung
> > See Documentation/trace/events.txt for real examples. > > Signed-off-by: Tom Zanussi <tom.zanussi@linux.intel.com> > Tested-by: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
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