linux-kernel - Re: [BUG] perf parser: does not support arbitrary new sysfs events

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Date:	Sun, 28 Oct 2012 18:50:35 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	Stephane Eranian <eranian@...gle.com>
Cc:	LKML <linux-kernel@...r.kernel.org>, Jiri Olsa <jolsa@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	"mingo\@elte.hu" <mingo@...e.hu>,
	Namhyung Kim <namhyung.kim@....com>
Subject: Re: [BUG] perf parser: does not support arbitrary new sysfs events

Stephane Eranian <eranian@...gle.com> writes:

> Hi,
>
> The latest round of perf parser changes broke my PEBS-LL patch series
> (at the last minute). For PEBS-LL, I need to add to generic events but I want
> to keep them PMU specific. As such, they need to live in the sysfs events
> subdir: /sys/devices/cpu/events/mem-loads, sys/devices/cpu/events/mem-stores.
>
> Given your latest rounds of sysfs event changes, I had to modify my kernel
> patches to fit those two new events within your perf_pmu_events_attr tables.
>
> But now, when I try to do:
>
> $ perf record -e cpu/mem-loads/ ....

- is not supported in an event name. I fixed this in my patchkit

Yes the sysfs stuff in general is quite fragile.

-Andi

-- 
ak@...ux.intel.com -- Speaking for myself only
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