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Groups > linux.kernel > #1456602
| From | Peter Zijlstra <peterz@infradead.org> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [PATCH 2/3] perf/core: introduce pmu_event_flags and PMUEF_READ_CPU_PKG |
| Date | 2016-08-04 19:30 +0200 |
| Message-ID | <s2uCZ-41d-7@gated-at.bofh.it> (permalink) |
| References | <s1ypj-786-3@gated-at.bofh.it> <s1ypj-786-11@gated-at.bofh.it> <s2srw-2sp-27@gated-at.bofh.it> <s2uCZ-41d-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On Thu, Aug 04, 2016 at 10:23:43AM -0700, David Carrillo-Cisneros wrote: > >> Introduce the flag PMUEF_READ_CPU_PKG, useful for uncore events, that > >> allows a PMU to signal the generic perf code that an event is readable > >> on the current CPU if the event is: > >> - active in a CPU in the same package as the current CPU (local CPU) > > > > Ok that I get.. > > > >> - not active but is attached to a CPU (i.e. event->cpu != -1) in the > >> same package as the current CPU. > > > > but this, not so much. Why would you want to read an inactive counter? > > Uncore counters are active even if its event is not. Not in general they are not, and if they are (freerunning msr counters for example) we should not include the counts when the event is inactive.
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[PATCH 0/3] remove unnecessary IPI reading uncore events David Carrillo-Cisneros <davidcc@google.com> - 2016-08-02 05:20 +0200
[PATCH 3/3] perf/x86: use PMUEF_READ_CPU_PKG in uncore events David Carrillo-Cisneros <davidcc@google.com> - 2016-08-02 05:20 +0200
[PATCH 2/3] perf/core: introduce pmu_event_flags and PMUEF_READ_CPU_PKG David Carrillo-Cisneros <davidcc@google.com> - 2016-08-02 05:20 +0200
Re: [PATCH 2/3] perf/core: introduce pmu_event_flags and PMUEF_READ_CPU_PKG Peter Zijlstra <peterz@infradead.org> - 2016-08-04 17:10 +0200
Re: [PATCH 2/3] perf/core: introduce pmu_event_flags and PMUEF_READ_CPU_PKG David Carrillo-Cisneros <davidcc@google.com> - 2016-08-04 19:30 +0200
Re: [PATCH 2/3] perf/core: introduce pmu_event_flags and PMUEF_READ_CPU_PKG Peter Zijlstra <peterz@infradead.org> - 2016-08-04 17:10 +0200
Re: [PATCH 2/3] perf/core: introduce pmu_event_flags and PMUEF_READ_CPU_PKG Peter Zijlstra <peterz@infradead.org> - 2016-08-04 19:30 +0200
Re: [PATCH 2/3] perf/core: introduce pmu_event_flags and PMUEF_READ_CPU_PKG David Carrillo-Cisneros <davidcc@google.com> - 2016-08-04 19:50 +0200
Re: [PATCH 2/3] perf/core: introduce pmu_event_flags and PMUEF_READ_CPU_PKG David Carrillo-Cisneros <davidcc@google.com> - 2016-08-04 19:40 +0200
Re: [PATCH 2/3] perf/core: introduce pmu_event_flags and PMUEF_READ_CPU_PKG Peter Zijlstra <peterz@infradead.org> - 2016-08-04 17:50 +0200
[PATCH 1/3] perf/core: check return value of perf_event_read IPI David Carrillo-Cisneros <davidcc@google.com> - 2016-08-02 06:40 +0200
Re: [PATCH 0/3] remove unnecessary IPI reading uncore events Andi Kleen <ak@linux.intel.com> - 2016-08-02 17:30 +0200
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