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

[Laurent Dufour]

Le 06/07/2020 Ã 11:25, Chinwen Chang a ÃcritÂ:
> On Thu, 2019-06-20 at 16:19 +0800, Haiyan Song wrote:
> > 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 Ã 10:37, Laurent Dufour a Ãcrit :
> > > > 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.
>
> Hi Laurent,
>
> We merged SPF v11 and some patches from v12 into our platforms. After
> several experiments, we observed SPF has obvious improvements on the
> launch time of applications, especially for those high-TLP ones,
>
> # launch time of applications(s):
>
> package           version      w/ SPF      w/o SPF      improve(%)
> ------------------------------------------------------------------
> Baidu maps        10.13.3      0.887       0.98         9.49
> Taobao            8.4.0.35     1.227       1.293        5.10
> Meituan           9.12.401     1.107       1.543        28.26
> WeChat            7.0.3        2.353       2.68         12.20
> Honor of Kings    1.43.1.6     6.63        6.713        1.24

That's great news, thanks for reporting this!

> By the way, we have verified our platforms with those patches and
> achieved the goal of mass production.

Another good news!
For my information, what is your targeted hardware?

Cheers,
Laurent.