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

[Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>]

Benjamin Herrenschmidt [benh@kernel.crashing.org] wrote:
| On Thu, 2012-02-09 at 19:19 -0800, Sukadev Bhattiprolu wrote:
| > Stephane Eranian [eranian@google.com] wrote:
| > | On Wed, Feb 8, 2012 at 12:32 PM, Anton Blanchard <anton@samba.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