From: Ingo Molnar <mingo@elte.hu>
To: David Ahern <dsahern@gmail.com>
Cc: linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
acme@ghostprotocols.net, peterz@infradead.org,
fweisbec@gmail.com, paulus@samba.org, tglx@linutronix.de
Subject: Re: [PATCH] perf stat: clarify unsupported events from uncounted events
Date: Sat, 28 May 2011 20:08:48 +0200 [thread overview]
Message-ID: <20110528180848.GC12530@elte.hu> (raw)
In-Reply-To: <1306515106-11967-1-git-send-email-dsahern@gmail.com>
* David Ahern <dsahern@gmail.com> wrote:
> After:
>
> perf stat -ddd -- sleep 1
>
> Performance counter stats for 'sleep 1':
>
> 1.350326 task-clock # 0.001 CPUs utilized
> 2 context-switches # 0.001 M/sec
> 0 CPU-migrations # 0.000 M/sec
> 157 page-faults # 0.116 M/sec
> 11,986 cycles # 0.009 GHz
> <not supported> stalled-cycles-frontend
> <not supported> stalled-cycles-backend
> 496,986 instructions # 41.46 insns per cycle
> 138,065 branches # 102.246 M/sec
> 7,245 branch-misses # 5.25% of all branches [97.60%]
> <not counted> L1-dcache-loads
> <not counted> L1-dcache-load-misses
> <not counted> LLC-loads
> <not counted> LLC-load-misses
> <not counted> L1-icache-loads
> <not counted> L1-icache-load-misses
> <not counted> dTLB-loads
> <not counted> dTLB-load-misses
> <not counted> iTLB-loads
> <not counted> iTLB-load-misses
> <not counted> L1-dcache-prefetches
> <not supported> L1-dcache-prefetch-misses
That looks like a really useful distinction!
Thanks,
Ingo
prev parent reply other threads:[~2011-05-28 18:09 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-05-27 16:51 [PATCH] perf stat: clarify unsupported events from uncounted events David Ahern
2011-05-27 17:25 ` Arnaldo Carvalho de Melo
2011-05-28 18:08 ` Ingo Molnar [this message]
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