* restricting counted/sampled events @ 2015-11-12 18:18 Tony Jones 2015-11-12 22:58 ` Andi Kleen 2015-11-12 23:08 ` Arnaldo Carvalho de Melo 0 siblings, 2 replies; 6+ messages in thread From: Tony Jones @ 2015-11-12 18:18 UTC (permalink / raw) To: linux-perf-users I don't believe there is current support to do this, but maybe I'm overlooking something? I'd like to be able to restrict the pmu (or filter results) to report counting/sampling between two arbitrary code points, such as a tracepoint or kprobe. I believe it will require core perf changes and was curious on peoples thoughts? Tony ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: restricting counted/sampled events 2015-11-12 18:18 restricting counted/sampled events Tony Jones @ 2015-11-12 22:58 ` Andi Kleen 2015-11-12 23:08 ` Arnaldo Carvalho de Melo 1 sibling, 0 replies; 6+ messages in thread From: Andi Kleen @ 2015-11-12 22:58 UTC (permalink / raw) To: Tony Jones; +Cc: linux-perf-users Tony Jones <tonyj@suse.de> writes: > I don't believe there is current support to do this, but maybe I'm overlooking something? It may be possible in systemtap, but not in the builtin tracers yes. > > I'd like to be able to restrict the pmu (or filter results) to report counting/sampling between two arbitrary code points, such as a tracepoint or kprobe. > > I believe it will require core perf changes and was curious on peoples thoughts? I'm not sure about messing with sampling (you can always filter that later). But able to collect PMU counter values are kprobes/tracepoints would be fairly useful yes. It shouldn't be that difficult to do. -Andi -- ak@linux.intel.com -- Speaking for myself only ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: restricting counted/sampled events 2015-11-12 18:18 restricting counted/sampled events Tony Jones 2015-11-12 22:58 ` Andi Kleen @ 2015-11-12 23:08 ` Arnaldo Carvalho de Melo 2015-11-13 0:05 ` Tony Jones 2015-11-16 8:59 ` Jiri Olsa 1 sibling, 2 replies; 6+ messages in thread From: Arnaldo Carvalho de Melo @ 2015-11-12 23:08 UTC (permalink / raw) To: Tony Jones; +Cc: linux-perf-users, Jiri Olsa Em Thu, Nov 12, 2015 at 10:18:02AM -0800, Tony Jones escreveu: > I don't believe there is current support to do this, but maybe I'm > overlooking something? > I'd like to be able to restrict the pmu (or filter results) to report > counting/sampling between two arbitrary code points, such as a > tracepoint or kprobe. > I believe it will require core perf changes and was curious on peoples > thoughts? Something like this: https://lkml.org/lkml/2013/9/25/227 Jiri? - Arnaldo ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: restricting counted/sampled events 2015-11-12 23:08 ` Arnaldo Carvalho de Melo @ 2015-11-13 0:05 ` Tony Jones 2015-11-16 8:59 ` Jiri Olsa 1 sibling, 0 replies; 6+ messages in thread From: Tony Jones @ 2015-11-13 0:05 UTC (permalink / raw) To: Arnaldo Carvalho de Melo; +Cc: linux-perf-users, Jiri Olsa On 11/12/2015 03:08 PM, Arnaldo Carvalho de Melo wrote: > Em Thu, Nov 12, 2015 at 10:18:02AM -0800, Tony Jones escreveu: > >> I don't believe there is current support to do this, but maybe I'm >> overlooking something? > >> I'd like to be able to restrict the pmu (or filter results) to report >> counting/sampling between two arbitrary code points, such as a >> tracepoint or kprobe. > >> I believe it will require core perf changes and was curious on peoples >> thoughts? > > Something like this: > > https://lkml.org/lkml/2013/9/25/227 Yes, I'd not found that in my searching. Thanks for the ptr. ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: restricting counted/sampled events 2015-11-12 23:08 ` Arnaldo Carvalho de Melo 2015-11-13 0:05 ` Tony Jones @ 2015-11-16 8:59 ` Jiri Olsa 2015-11-16 16:26 ` Tony Jones 1 sibling, 1 reply; 6+ messages in thread From: Jiri Olsa @ 2015-11-16 8:59 UTC (permalink / raw) To: Arnaldo Carvalho de Melo Cc: Tony Jones, linux-perf-users, Jiri Olsa, Stephane Eranian, Frederic Weisbecker On Thu, Nov 12, 2015 at 08:08:07PM -0300, Arnaldo Carvalho de Melo wrote: > Em Thu, Nov 12, 2015 at 10:18:02AM -0800, Tony Jones escreveu: > > > I don't believe there is current support to do this, but maybe I'm > > overlooking something? > > > I'd like to be able to restrict the pmu (or filter results) to report > > counting/sampling between two arbitrary code points, such as a > > tracepoint or kprobe. > > > I believe it will require core perf changes and was curious on peoples > > thoughts? > > Something like this: > > https://lkml.org/lkml/2013/9/25/227 > > Jiri? yep.. sounds like toggling ;-) this code was put aside ATM not sure it'll be ressurected soon, but I remember Stephane asked me about that some time ago (CC-ed), maybe he has more info jirka ^ permalink raw reply [flat|nested] 6+ messages in thread
* Re: restricting counted/sampled events 2015-11-16 8:59 ` Jiri Olsa @ 2015-11-16 16:26 ` Tony Jones 0 siblings, 0 replies; 6+ messages in thread From: Tony Jones @ 2015-11-16 16:26 UTC (permalink / raw) To: Jiri Olsa, Arnaldo Carvalho de Melo Cc: linux-perf-users, Jiri Olsa, Stephane Eranian, Frederic Weisbecker On 11/16/2015 12:59 AM, Jiri Olsa wrote: > On Thu, Nov 12, 2015 at 08:08:07PM -0300, Arnaldo Carvalho de Melo wrote: >> Em Thu, Nov 12, 2015 at 10:18:02AM -0800, Tony Jones escreveu: >> >>> I don't believe there is current support to do this, but maybe I'm >>> overlooking something? >> >>> I'd like to be able to restrict the pmu (or filter results) to report >>> counting/sampling between two arbitrary code points, such as a >>> tracepoint or kprobe. >> >>> I believe it will require core perf changes and was curious on peoples >>> thoughts? >> >> Something like this: >> >> https://lkml.org/lkml/2013/9/25/227 >> >> Jiri? > > yep.. sounds like toggling ;-) this code was put aside ATM > > not sure it'll be ressurected soon, but I remember Stephane asked > me about that some time ago (CC-ed), maybe he has more info > > jirka If noone is currently working on it, I'd be interested in taking it over. Tony ^ permalink raw reply [flat|nested] 6+ messages in thread
end of thread, other threads:[~2015-11-16 16:33 UTC | newest] Thread overview: 6+ messages (download: mbox.gz follow: Atom feed -- links below jump to the message on this page -- 2015-11-12 18:18 restricting counted/sampled events Tony Jones 2015-11-12 22:58 ` Andi Kleen 2015-11-12 23:08 ` Arnaldo Carvalho de Melo 2015-11-13 0:05 ` Tony Jones 2015-11-16 8:59 ` Jiri Olsa 2015-11-16 16:26 ` Tony Jones
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