From: Vince Weaver <vincent.weaver@maine.edu>
To: Yuanfang Chen <cyfmxc@gmail.com>
Cc: linux-perf-users@vger.kernel.org
Subject: Re: event group without multiplexing
Date: Thu, 12 Nov 2015 11:51:41 -0500 (EST) [thread overview]
Message-ID: <alpine.DEB.2.20.1511121148550.6382@vincent-weaver-1.umelst.maine.edu> (raw)
In-Reply-To: <CAJh9x3q1ZeJ7U2XFpP2PbaeJ4xtjNJ1K13fYQSjnZKiO2LjKWQ@mail.gmail.com>
On Thu, 12 Nov 2015, Yuanfang Chen wrote:
> And the case can be reduced to
>
> perf stat -e \{r1000248,r148\} -- sleep 1
>
> Performance counter stats for 'sleep 1':
>
> 7008 r1000248
> <not supported> r148
the kernel thinks that all events of type 0x48 (L1D_PEND_MISS) can only go
into one of the counters, and thus you can't have multiple at the same
time.
If this is a bug you'll need to report it to the perf_event developers.
I'd double check intel's documents to see what they actuall say about this
class of events on your processor.
Vince
next prev parent reply other threads:[~2015-11-12 16:49 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-11 22:05 event group without multiplexing Yuanfang Chen
2015-11-12 14:58 ` Yuanfang Chen
2015-11-12 15:02 ` Yuanfang Chen
2015-11-12 16:51 ` Vince Weaver [this message]
2015-11-12 17:40 ` Michael Petlan
2015-11-12 17:51 ` Vince Weaver
2015-11-12 18:00 ` Vince Weaver
2015-11-12 18:12 ` Yuanfang Chen
2015-11-17 0:39 ` Andi Kleen
2015-11-17 3:03 ` Yuanfang Chen
2015-11-21 0:58 ` Andi Kleen
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