linux-kernel - Re: [PATCH] page_alloc.c: inline _

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Date:   Tue, 10 Oct 2017 10:51:51 +0800
From:   Aaron Lu <aaron.lu@...el.com>
To:     Dave Hansen <dave.hansen@...el.com>
Cc:     linux-mm <linux-mm@...ck.org>, lkml <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Huang Ying <ying.huang@...el.com>,
        Tim Chen <tim.c.chen@...ux.intel.com>,
        Kemi Wang <kemi.wang@...el.com>
Subject: Re: [PATCH] page_alloc.c: inline __rmqueue()

On Mon, Oct 09, 2017 at 01:23:34PM -0700, Dave Hansen wrote:
> On 10/08/2017 10:44 PM, Aaron Lu wrote:
> > On a 2 sockets Intel-Skylake machine:
> >       base          %change       head
> >      77342            +6.3%      82203        will-it-scale.per_process_ops
> 
> What's the unit here?  That seems ridiculously low for page_fault1.
> It's usually in the millions.

per_process_ops = processes/nr_process

since nr_process here is nr_cpu, so on the 2 sockets machine with 104
CPUs, processes are 8043568(base) and 8549112(head), which are in the
millions as you correctly pointed out.