linux-kernel - Re: [PATCH 04/28] mm, page_alloc: Inline zone

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Message-ID: <571DFCC2.4050405@suse.cz>
Date:	Mon, 25 Apr 2016 13:17:22 +0200
From:	Vlastimil Babka <vbabka@...e.cz>
To:	Mel Gorman <mgorman@...hsingularity.net>,
	Andrew Morton <akpm@...ux-foundation.org>
Cc:	Jesper Dangaard Brouer <brouer@...hat.com>,
	Linux-MM <linux-mm@...ck.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 04/28] mm, page_alloc: Inline zone_statistics

On 04/15/2016 10:58 AM, Mel Gorman wrote:
> zone_statistics has one call-site but it's a public function. Make
> it static and inline.
>
> The performance difference on a page allocator microbenchmark is;
>
>                                             4.6.0-rc2                  4.6.0-rc2
>                                      statbranch-v1r20           statinline-v1r20
> Min      alloc-odr0-1               419.00 (  0.00%)           412.00 (  1.67%)
> Min      alloc-odr0-2               305.00 (  0.00%)           301.00 (  1.31%)
> Min      alloc-odr0-4               250.00 (  0.00%)           247.00 (  1.20%)
> Min      alloc-odr0-8               219.00 (  0.00%)           215.00 (  1.83%)
> Min      alloc-odr0-16              203.00 (  0.00%)           199.00 (  1.97%)
> Min      alloc-odr0-32              195.00 (  0.00%)           191.00 (  2.05%)
> Min      alloc-odr0-64              191.00 (  0.00%)           187.00 (  2.09%)
> Min      alloc-odr0-128             189.00 (  0.00%)           185.00 (  2.12%)
> Min      alloc-odr0-256             198.00 (  0.00%)           193.00 (  2.53%)
> Min      alloc-odr0-512             210.00 (  0.00%)           207.00 (  1.43%)
> Min      alloc-odr0-1024            216.00 (  0.00%)           213.00 (  1.39%)
> Min      alloc-odr0-2048            221.00 (  0.00%)           220.00 (  0.45%)
> Min      alloc-odr0-4096            227.00 (  0.00%)           226.00 (  0.44%)
> Min      alloc-odr0-8192            232.00 (  0.00%)           229.00 (  1.29%)
> Min      alloc-odr0-16384           232.00 (  0.00%)           229.00 (  1.29%)
>
> Signed-off-by: Mel Gorman <mgorman@...hsingularity.net>

Acked-by: Vlastimil Babka <vbabka@...e.cz>