Messages in this thread | | | Date | Thu, 10 Dec 2009 08:23:51 +0100 | From | Ingo Molnar <> | Subject | Re: [PATCH] perf sched: Add max delay time snapshot |
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* Xiao Guangrong <xiaoguangrong@cn.fujitsu.com> wrote:
> Frederic Weisbecker wrote: > > > When we have a maximum latency reported for a task, we need a > > convenient way to find the matching location to the raw traces or to > > perf sched map that shows where the task has been eventually > > scheduled in. This gives a pointer to retrieve the events that > > occured during this max latency. > > Then, we can cooperate with ftrace's data to know what the cpu is > doing at that time.
What do you mean by mixing it with ftrace data? These events ought to be a full replacement for the sched and wakeup tracers. In the long run we want a single stream of events and phase out most of the pretty-printing ftrace plugins.
Ingo
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