From: Andi Kleen <andi@firstfloor.org>
To: "H. Taheri" <rezato@gmail.com>
Cc: "linux-perf-users@vger.kernel.org" <linux-perf-users@vger.kernel.org>
Subject: Re: Not getting PMC events on Broadwell-EX
Date: Tue, 08 Aug 2017 09:32:25 -0700 [thread overview]
Message-ID: <878tiu3tra.fsf@firstfloor.org> (raw)
In-Reply-To: <B10BA2E5-3BC7-481F-8EC7-DFEB229526EC@vmware.com> (H. Taheri's message of "Mon, 7 Aug 2017 21:37:19 -0700")
"H. Taheri" <rezato@gmail.com> writes:
> I am getting 0s, or <not supported>, or <not counted> for events that are supposed to work on this processor. For example, according to Intel documentation, L2_RQSTS.MISS and L2_RQSTS.REFERENCES are supported on this processor with event code 0x24 and unit masks 0x3f and 0xff. But when I run perf stat (also with -d -d -d to see if the built-in command options can get the cache stats), I get:
>
> [root@prme-perf-broadwell-2 intel]# perf stat -d -d -d -e cycles -e instructions -e r24ff -e r243f sleep 10
You're missing -a, so it's only measuring sleep itself.
-Andi
next prev parent reply other threads:[~2017-08-08 16:32 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-08-08 4:37 Not getting PMC events on Broadwell-EX H. Taheri
2017-08-08 13:53 ` Vince Weaver
2017-08-08 16:32 ` Andi Kleen [this message]
2017-08-08 16:54 ` Reza Taheri
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