linux-kernel - Re: [PATCH] perf_events: fix broken intr throttling (v3)

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Date:	Sun, 19 Feb 2012 12:26:52 +0100
From:	Stephane Eranian <eranian@...gle.com>
To:	Sukadev Bhattiprolu <sukadev@...ux.vnet.ibm.com>
Cc:	Benjamin Herrenschmidt <benh@...nel.crashing.org>,
	Anton Blanchard <anton@...ba.org>,
	linux-kernel@...r.kernel.org, peterz@...radead.org, mingo@...e.hu,
	gleb@...hat.com, wcohen@...hat.com, vince@...ter.net,
	asharma@...com, andi@...stfloor.org, paulus@...ba.org,
	emunson@...bm.net, imunsie@....ibm.com,
	Matt Helsley <matthltc@...ibm.com>
Subject: Re: [PATCH] perf_events: fix broken intr throttling (v3)

Did Anton recent fix solve that problem?


On Wed, Feb 15, 2012 at 3:37 AM, Sukadev Bhattiprolu
<sukadev@...ux.vnet.ibm.com> wrote:
> Benjamin Herrenschmidt [benh@...nel.crashing.org] wrote:
> | On Thu, 2012-02-09 at 19:19 -0800, Sukadev Bhattiprolu wrote:
> | > Stephane Eranian [eranian@...gle.com] wrote:
> | > | On Wed, Feb 8, 2012 at 12:32 PM, Anton Blanchard <anton@...ba.org> wrote:
> | > | >
> | > | > Hi,
> | > | >
> | > | > On Thu, 26 Jan 2012 17:03:19 +0100
> | The powerpc .git tree is not useful at this point, I haven't opened
> | powerpc -next yet so it's just all old stale stuff. Please work with
> | upstream always unless you have a very good reason to use my tree. It's
> | really only meant as a conduit between me and Linus or for -next.
>
> Ok.
>
> I tried this on current mainline (commit 13d261932) which now includes both
> of Stephane's patches and repeated the nooploop test.
>
> The problem still exists - the number of events reported on Power is far
> fewer than without the patches.
>
> Aggregated stats:
>           TOTAL events:         78
>            MMAP events:         47
>            COMM events:          2
>            EXIT events:          2
>          SAMPLE events:         27
> cycles stats:
>           TOTAL events:         21
>            MMAP events:          4
>            COMM events:          1
>            EXIT events:          2
>          SAMPLE events:         14
> cycles stats:
>           TOTAL events:         13
>          SAMPLE events:         13
>
> Sukadev
>
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