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Date: Wed, 10 Oct 2018 10:07:24 +0200
From: Oscar Salvador <osalvador@...hadventures.net>
To: Arun KS <arunks@...eaurora.org>
Cc: kys@...rosoft.com, haiyangz@...rosoft.com, sthemmin@...rosoft.com,
boris.ostrovsky@...cle.com, jgross@...e.com,
akpm@...ux-foundation.org, dan.j.williams@...el.com,
mhocko@...e.com, vbabka@...e.cz, iamjoonsoo.kim@....com,
gregkh@...uxfoundation.org, osalvador@...e.de, malat@...ian.org,
kirill.shutemov@...ux.intel.com, jrdr.linux@...il.com,
yasu.isimatu@...il.com, mgorman@...hsingularity.net,
aaron.lu@...el.com, devel@...uxdriverproject.org,
linux-kernel@...r.kernel.org, linux-mm@...ck.org,
xen-devel@...ts.xenproject.org, vatsa@...eaurora.org,
vinmenon@...eaurora.org, getarunks@...il.com
Subject: Re: [PATCH v5 1/2] memory_hotplug: Free pages as higher order
On Fri, Oct 05, 2018 at 01:40:05PM +0530, Arun KS wrote:
> When free pages are done with higher order, time spend on
> coalescing pages by buddy allocator can be reduced. With
> section size of 256MB, hot add latency of a single section
> shows improvement from 50-60 ms to less than 1 ms, hence
> improving the hot add latency by 60%. Modify external
> providers of online callback to align with the change.
Hi Arun, out of curiosity:
could you please explain how exactly did you mesure the speed
improvement?
Thanks
--
Oscar Salvador
SUSE L3
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