linux-kernel - Re: [PATCH v12 00/31] Speculative page faults

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Message-ID: <20190620081945.hwj6ruqddefnxg6z@haiyan.sh.intel.com>
Date:   Thu, 20 Jun 2019 16:19:45 +0800
From:   Haiyan Song <haiyanx.song@...el.com>
To:     Laurent Dufour <ldufour@...ux.ibm.com>
Cc:     akpm@...ux-foundation.org, mhocko@...nel.org, peterz@...radead.org,
        kirill@...temov.name, ak@...ux.intel.com, dave@...olabs.net,
        jack@...e.cz, Matthew Wilcox <willy@...radead.org>,
        aneesh.kumar@...ux.ibm.com, benh@...nel.crashing.org,
        mpe@...erman.id.au, paulus@...ba.org,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>, hpa@...or.com,
        Will Deacon <will.deacon@....com>,
        Sergey Senozhatsky <sergey.senozhatsky@...il.com>,
        sergey.senozhatsky.work@...il.com,
        Andrea Arcangeli <aarcange@...hat.com>,
        Alexei Starovoitov <alexei.starovoitov@...il.com>,
        kemi.wang@...el.com, Daniel Jordan <daniel.m.jordan@...cle.com>,
        David Rientjes <rientjes@...gle.com>,
        Jerome Glisse <jglisse@...hat.com>,
        Ganesh Mahendran <opensource.ganesh@...il.com>,
        Minchan Kim <minchan@...nel.org>,
        Punit Agrawal <punitagrawal@...il.com>,
        vinayak menon <vinayakm.list@...il.com>,
        Yang Shi <yang.shi@...ux.alibaba.com>,
        zhong jiang <zhongjiang@...wei.com>,
        Balbir Singh <bsingharora@...il.com>, sj38.park@...il.com,
        Michel Lespinasse <walken@...gle.com>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        haren@...ux.vnet.ibm.com, npiggin@...il.com,
        paulmck@...ux.vnet.ibm.com, Tim Chen <tim.c.chen@...ux.intel.com>,
        linuxppc-dev@...ts.ozlabs.org, x86@...nel.org
Subject: Re: [PATCH v12 00/31] Speculative page faults

Hi Laurent,

I downloaded your script and run it on Intel 2s skylake platform with spf-v12 patch
serials.

Here attached the output results of this script.

The following comparison result is statistics from the script outputs.

a). Enable THP
                                            SPF_0          change       SPF_1
will-it-scale.page_fault2.per_thread_ops    2664190.8      -11.7%       2353637.6      
will-it-scale.page_fault3.per_thread_ops    4480027.2      -14.7%       3819331.9     


b). Disable THP
                                            SPF_0           change      SPF_1
will-it-scale.page_fault2.per_thread_ops    2653260.7       -10%        2385165.8
will-it-scale.page_fault3.per_thread_ops    4436330.1       -12.4%      3886734.2 


Thanks,
Haiyan Song


On Fri, Jun 14, 2019 at 10:44:47AM +0200, Laurent Dufour wrote:
> Le 14/06/2019 à 10:37, Laurent Dufour a écrit :
> > Please find attached the script I run to get these numbers.
> > This would be nice if you could give it a try on your victim node and share the result.
> 
> Sounds that the Intel mail fitering system doesn't like the attached shell script.
> Please find it there: https://gist.github.com/ldu4/a5cc1a93f293108ea387d43d5d5e7f44
> 
> Thanks,
> Laurent.
> 

View attachment "page_fault2_threads.5.1.0-rc4-mm1-00300-g02c5a1f.out" of type "text/plain" (715 bytes)

View attachment "page_fault3_threads.5.1.0-rc4-mm1-00300-g02c5a1f.out" of type "text/plain" (716 bytes)