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Groups > linux.kernel > #1432137 > unrolled thread
| Started by | Peter Zijlstra <peterz@infradead.org> |
|---|---|
| First post | 2016-06-27 18:00 +0200 |
| Last post | 2016-06-28 13:50 +0200 |
| Articles | 2 — 2 participants |
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Re: [RFC PATCH 2/2] perf: Filter events based on perf-namespace Peter Zijlstra <peterz@infradead.org> - 2016-06-27 18:00 +0200
Re: [RFC PATCH 2/2] perf: Filter events based on perf-namespace Aravinda Prasad <aravinda@linux.vnet.ibm.com> - 2016-06-28 13:50 +0200
| From | Peter Zijlstra <peterz@infradead.org> |
|---|---|
| Date | 2016-06-27 18:00 +0200 |
| Subject | Re: [RFC PATCH 2/2] perf: Filter events based on perf-namespace |
| Message-ID | <rOH73-2eF-9@gated-at.bofh.it> |
On Tue, Jun 14, 2016 at 10:19:51PM +0530, Aravinda Prasad wrote: > Whenever perf tool is executed inside a container, this > patch restricts the events to the perf-namespace in which > the perf tool is executing. > > This patch is based on the existing support available > for tracing with cgroups. > > TODO: > - Avoid code duplication. Can't you, at perf_event_open() time, convert a per-cpu event into a per-cpu-per-cgroup event for these namespace thingies? That seems to immediately and completely remove all that duplication.
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| From | Aravinda Prasad <aravinda@linux.vnet.ibm.com> |
|---|---|
| Date | 2016-06-28 13:50 +0200 |
| Message-ID | <rOZGG-6ug-11@gated-at.bofh.it> |
| In reply to | #1432137 |
On Monday 27 June 2016 09:20 PM, Peter Zijlstra wrote: > On Tue, Jun 14, 2016 at 10:19:51PM +0530, Aravinda Prasad wrote: >> Whenever perf tool is executed inside a container, this >> patch restricts the events to the perf-namespace in which >> the perf tool is executing. >> >> This patch is based on the existing support available >> for tracing with cgroups. >> >> TODO: >> - Avoid code duplication. > > Can't you, at perf_event_open() time, convert a per-cpu event into a > per-cpu-per-cgroup event for these namespace thingies? > > That seems to immediately and completely remove all that duplication. > Yes.. that seems possible. Let me check that out. -- Regards, Aravinda
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