Messages in this thread | | | Date | Tue, 09 Dec 2008 13:51:36 -0600 | From | "Chris Friesen" <> | Subject | Re: [patch] Performance Counters for Linux, v2 |
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Ingo Molnar wrote: > * Chris Friesen <cfriesen@nortel.com> wrote:
>> Regardless of sampling method, don't you still want some way to >> enable/disable the various counters as close to simultaneously as >> possible? > > If it's about counter control for the monitored task, then we sure could > do something about that. (apps/libraries could thus select a subset of > functions to profile/measure, runtime, etc.) > > If it's about counter control for the profiler/debugger, i'm not sure how > useful that is - do you have a good usecase for it?
I'm sure that others could give more usecases, but I was thinking about cases like "I want to test _these_ multiple metrics simultaneously over _this_ specific section of code". In a case like this, it seems desirable to start/stop the various performance counters as close together as possible, especially if the section of code being tested is short.
Chris
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