linux-kernel - Re: [RFC][PATCH 0/6] Another go at speculative page faults

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Message-ID: <20141021170948.GA25964@node.dhcp.inet.fi>
Date:	Tue, 21 Oct 2014 20:09:48 +0300
From:	"Kirill A. Shutemov" <kirill@...temov.name>
To:	Ingo Molnar <mingo@...nel.org>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	torvalds@...ux-foundation.org, paulmck@...ux.vnet.ibm.com,
	tglx@...utronix.de, akpm@...ux-foundation.org, riel@...hat.com,
	mgorman@...e.de, oleg@...hat.com, mingo@...hat.com,
	minchan@...nel.org, kamezawa.hiroyu@...fujitsu.com,
	viro@...iv.linux.org.uk, laijs@...fujitsu.com, dave@...olabs.net,
	linux-kernel@...r.kernel.org, linux-mm@...ck.org
Subject: Re: [RFC][PATCH 0/6] Another go at speculative page faults

On Tue, Oct 21, 2014 at 06:23:40PM +0200, Ingo Molnar wrote:
> 
> * Peter Zijlstra <peterz@...radead.org> wrote:
> 
> > My Ivy Bridge EP (2*10*2) has a ~58% improvement in pagefault throughput:
> > 
> > PRE:
> >        149,441,555      page-faults                  ( +-  1.25% )
> >
> > POST:
> >        236,442,626      page-faults                  ( +-  0.08% )
> 
> > My Ivy Bridge EX (4*15*2) has a ~78% improvement in pagefault throughput:
> > 
> > PRE:
> >        105,789,078      page-faults                 ( +-  2.24% )
> >
> > POST:
> >        187,751,767      page-faults                 ( +-  2.24% )
> 
> I guess the 'PRE' and 'POST' numbers should be flipped around?

I think it's faults per second.

It would be interesting to see if the patchset affects non-condended case.
Like a one-threaded workload.

-- 
 Kirill A. Shutemov
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