From: Michael Ellerman <mpe@ellerman.id.au>
To: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: paulus@samba.org, linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH] powerpc/mm: Add trace point for tracking hash pte fault
Date: Wed, 21 Jan 2015 14:07:07 +1100 [thread overview]
Message-ID: <1421809627.4900.1.camel@ellerman.id.au> (raw)
In-Reply-To: <1421753750-17135-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com>
On Tue, 2015-01-20 at 17:05 +0530, Aneesh Kumar K.V wrote:
> This enables us to understand how many hash fault we are taking
> when running benchmarks.
>
> For ex:
> -bash-4.2# ./perf stat -e powerpc:hash_fault -e page-faults /tmp/ebizzy.ppc64 -S 30 -P -n 1000
> ...
>
> Performance counter stats for '/tmp/ebizzy.ppc64 -S 30 -P -n 1000':
>
> 1,10,04,075 powerpc:hash_fault
> 1,10,03,429 page-faults
>
> 30.865978991 seconds time elapsed
Looks good.
Can you attach some test results that show it's not hurting performance when
it's disabled.
cheers
next prev parent reply other threads:[~2015-01-21 3:07 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-01-20 11:35 [PATCH] powerpc/mm: Add trace point for tracking hash pte fault Aneesh Kumar K.V
2015-01-21 3:07 ` Michael Ellerman [this message]
2015-01-21 8:45 ` Aneesh Kumar K.V
2015-01-28 6:11 ` Michael Ellerman
2015-02-02 10:26 ` Anton Blanchard
2015-02-02 16:21 ` Aneesh Kumar K.V
2015-02-02 22:01 ` Anton Blanchard
2015-02-03 3:07 ` Aneesh Kumar K.V
2015-02-02 16:12 ` Aneesh Kumar K.V
2015-04-02 8:44 ` Aneesh Kumar K.V
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