From: Ingo Molnar <mingo@kernel.org>
To: Dave Hansen <dave@sr71.net>
Cc: Raghavendra KT <raghavendra.kt.linux@gmail.com>,
linux-kernel@vger.kernel.org, x86@kernel.org, linux-mm@kvack.org,
Raghavendra KT <raghavendra.kt@linux.vnet.ibm.com>
Subject: Re: [RESEND][PATCH] mm: vmstats: tlb flush counters
Date: Mon, 22 Jul 2013 12:06:06 +0200 [thread overview]
Message-ID: <20130722100605.GA1148@gmail.com> (raw)
In-Reply-To: <51E95932.5030902@sr71.net>
* Dave Hansen <dave@sr71.net> wrote:
> On 07/19/2013 04:38 AM, Raghavendra KT wrote:
> > While measuring non - PLE performance, one of the bottleneck, I am seeing is
> > flush tlbs.
> > perf had helped in alaysing a bit there, but this patch would help
> > in precise calculation. It will aslo help in tuning the PLE window
> > experiments (larger PLE window
> > would affect remote flush TLBs)
>
> Interesting. What workload is that? I've been having problems finding
> workloads that are too consumed with TLB flushes.
Btw., would be nice to also integrate these VM counters into perf as well,
as an instrumentation variant/option.
It could be done in an almost zero overhead fashion using jump-labels I
think.
[ Just in case someone is bored to death and is looking for an interesting
side project ;-) ]
Thanks,
Ingo
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WARNING: multiple messages have this Message-ID (diff)
From: Ingo Molnar <mingo@kernel.org>
To: Dave Hansen <dave@sr71.net>
Cc: Raghavendra KT <raghavendra.kt.linux@gmail.com>,
linux-kernel@vger.kernel.org, x86@kernel.org, linux-mm@kvack.org,
Raghavendra KT <raghavendra.kt@linux.vnet.ibm.com>
Subject: Re: [RESEND][PATCH] mm: vmstats: tlb flush counters
Date: Mon, 22 Jul 2013 12:06:06 +0200 [thread overview]
Message-ID: <20130722100605.GA1148@gmail.com> (raw)
In-Reply-To: <51E95932.5030902@sr71.net>
* Dave Hansen <dave@sr71.net> wrote:
> On 07/19/2013 04:38 AM, Raghavendra KT wrote:
> > While measuring non - PLE performance, one of the bottleneck, I am seeing is
> > flush tlbs.
> > perf had helped in alaysing a bit there, but this patch would help
> > in precise calculation. It will aslo help in tuning the PLE window
> > experiments (larger PLE window
> > would affect remote flush TLBs)
>
> Interesting. What workload is that? I've been having problems finding
> workloads that are too consumed with TLB flushes.
Btw., would be nice to also integrate these VM counters into perf as well,
as an instrumentation variant/option.
It could be done in an almost zero overhead fashion using jump-labels I
think.
[ Just in case someone is bored to death and is looking for an interesting
side project ;-) ]
Thanks,
Ingo
next prev parent reply other threads:[~2013-07-22 10:06 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-07-16 23:44 [RESEND][PATCH] mm: vmstats: tlb flush counters Dave Hansen
2013-07-16 23:44 ` Dave Hansen
2013-07-17 7:21 ` Ingo Molnar
2013-07-17 7:21 ` Ingo Molnar
2013-07-18 20:51 ` Andrew Morton
2013-07-18 20:51 ` Andrew Morton
2013-07-19 8:28 ` Ingo Molnar
2013-07-19 8:28 ` Ingo Molnar
2013-07-19 15:51 ` Dave Hansen
2013-07-19 15:51 ` Dave Hansen
2013-07-19 11:38 ` Raghavendra KT
2013-07-19 11:38 ` Raghavendra KT
2013-07-19 15:20 ` Dave Hansen
2013-07-19 15:20 ` Dave Hansen
2013-07-20 13:09 ` Raghavendra K T
2013-07-20 13:09 ` Raghavendra K T
2013-07-22 10:06 ` Ingo Molnar [this message]
2013-07-22 10:06 ` Ingo Molnar
2013-07-22 16:59 ` Dave Hansen
2013-07-22 16:59 ` Dave Hansen
2013-07-23 8:17 ` Ingo Molnar
2013-07-23 8:17 ` Ingo Molnar
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