From: Peter Zijlstra <peterz@infradead.org>
To: lkp@lists.01.org
Subject: Re: [timer] 17cdf560f27: +4.0% boot-meminfo.VmallocUsed
Date: Fri, 03 Apr 2015 16:23:20 +0200 [thread overview]
Message-ID: <20150403142320.GI27490@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <CAC=cRTNjmJF6icPUrWdgJu8wcX-fKpgTo9V4o6wA5z-8sfncwA@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 1812 bytes --]
On Fri, Apr 03, 2015 at 09:03:48AM +0800, huang ying wrote:
> On Thu, Apr 2, 2015 at 3:54 PM, Peter Zijlstra <peterz@infradead.org> wrote:
>
> > On Thu, Apr 02, 2015 at 09:06:09AM +0800, Huang Ying wrote:
> > > FYI, we noticed the below changes on
> > >
> > > git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/linux.git
> > timer/alloc_tvec_statically
> > > commit 17cdf560f2727f687ab159707d0aa591f8a2f82d ("timer: Allocate
> > per-cpu tvec_base's statically")
> > >
> > >
> > > testbox/testcase/testparams: lkp-sbx04/boot/performance-1
> > >
> > > c5e77f5216abdd1d 17cdf560f2727f687ab159707d
> > > ---------------- --------------------------
> > > %stddev %change %stddev
> > > \ | \
> > > 410996 ± 0% +4.0% 427412 ± 0% boot-meminfo.VmallocUsed
> > >
> > > testbox/testcase/testparams: wsm/boot/performance-1
> > >
> > > c5e77f5216abdd1d 17cdf560f2727f687ab159707d
> > > ---------------- --------------------------
> > > 85712 ± 0% +2.4% 87772 ± 0% boot-meminfo.VmallocUsed
> > >
> > > testbox/testcase/testparams: lkp-snb01/boot/performance-1
> > >
> > > c5e77f5216abdd1d 17cdf560f2727f687ab159707d
> > > ---------------- --------------------------
> > > 447001 ± 0% -1.0% 442558 ± 0% boot-slabinfo.num_objs
> > > 125616 ± 5% -13.5% 108720 ± 4% boot-meminfo.DirectMap4k
> > > 347196 ± 0% +4.7% 363612 ± 0% boot-meminfo.VmallocUsed
> > >
> >
> > well, duh.. it changes a dynamic allocation into a static per-cpu one.
> > What did you expect?
> >
>
> Just FYI. This may be the expected behavior. If so, you have a third
> party test report.
Ah ok. I thought you thought it was a bug/regression.
Thanks
WARNING: multiple messages have this Message-ID (diff)
From: Peter Zijlstra <peterz@infradead.org>
To: huang ying <huang.ying.caritas@gmail.com>
Cc: Huang Ying <ying.huang@intel.com>,
Viresh Kumar <viresh.kumar@linaro.org>,
LKML <linux-kernel@vger.kernel.org>, LKP ML <lkp@01.org>
Subject: Re: [LKP] [timer] 17cdf560f27: +4.0% boot-meminfo.VmallocUsed
Date: Fri, 3 Apr 2015 16:23:20 +0200 [thread overview]
Message-ID: <20150403142320.GI27490@worktop.programming.kicks-ass.net> (raw)
In-Reply-To: <CAC=cRTNjmJF6icPUrWdgJu8wcX-fKpgTo9V4o6wA5z-8sfncwA@mail.gmail.com>
On Fri, Apr 03, 2015 at 09:03:48AM +0800, huang ying wrote:
> On Thu, Apr 2, 2015 at 3:54 PM, Peter Zijlstra <peterz@infradead.org> wrote:
>
> > On Thu, Apr 02, 2015 at 09:06:09AM +0800, Huang Ying wrote:
> > > FYI, we noticed the below changes on
> > >
> > > git://git.kernel.org/pub/scm/linux/kernel/git/vireshk/linux.git
> > timer/alloc_tvec_statically
> > > commit 17cdf560f2727f687ab159707d0aa591f8a2f82d ("timer: Allocate
> > per-cpu tvec_base's statically")
> > >
> > >
> > > testbox/testcase/testparams: lkp-sbx04/boot/performance-1
> > >
> > > c5e77f5216abdd1d 17cdf560f2727f687ab159707d
> > > ---------------- --------------------------
> > > %stddev %change %stddev
> > > \ | \
> > > 410996 ± 0% +4.0% 427412 ± 0% boot-meminfo.VmallocUsed
> > >
> > > testbox/testcase/testparams: wsm/boot/performance-1
> > >
> > > c5e77f5216abdd1d 17cdf560f2727f687ab159707d
> > > ---------------- --------------------------
> > > 85712 ± 0% +2.4% 87772 ± 0% boot-meminfo.VmallocUsed
> > >
> > > testbox/testcase/testparams: lkp-snb01/boot/performance-1
> > >
> > > c5e77f5216abdd1d 17cdf560f2727f687ab159707d
> > > ---------------- --------------------------
> > > 447001 ± 0% -1.0% 442558 ± 0% boot-slabinfo.num_objs
> > > 125616 ± 5% -13.5% 108720 ± 4% boot-meminfo.DirectMap4k
> > > 347196 ± 0% +4.7% 363612 ± 0% boot-meminfo.VmallocUsed
> > >
> >
> > well, duh.. it changes a dynamic allocation into a static per-cpu one.
> > What did you expect?
> >
>
> Just FYI. This may be the expected behavior. If so, you have a third
> party test report.
Ah ok. I thought you thought it was a bug/regression.
Thanks
next prev parent reply other threads:[~2015-04-03 14:23 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-02 1:06 [timer] 17cdf560f27: +4.0% boot-meminfo.VmallocUsed Huang Ying
2015-04-02 1:06 ` [LKP] " Huang Ying
2015-04-02 7:54 ` Peter Zijlstra
2015-04-02 7:54 ` [LKP] " Peter Zijlstra
2015-04-03 1:03 ` huang ying
2015-04-03 14:23 ` Peter Zijlstra [this message]
2015-04-03 14:23 ` [LKP] " Peter Zijlstra
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