From: Andrea Arcangeli <aarcange@redhat.com>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: Rik van Riel <riel@redhat.com>,
linux-mm@kvack.org, Marcelo Tosatti <mtosatti@redhat.com>,
Adam Litke <agl@us.ibm.com>, Avi Kivity <avi@redhat.com>,
Izik Eidus <ieidus@redhat.com>,
Hugh Dickins <hugh.dickins@tiscali.co.uk>,
Nick Piggin <npiggin@suse.de>, Mel Gorman <mel@csn.ul.ie>,
Dave Hansen <dave@linux.vnet.ibm.com>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Ingo Molnar <mingo@elte.hu>, Mike Travis <travis@sgi.com>,
KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>,
Christoph Lameter <cl@linux-foundation.org>,
Chris Wright <chrisw@sous-sol.org>,
bpicco@redhat.com,
KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>,
Balbir Singh <balbir@linux.vnet.ibm.com>,
Arnd Bergmann <arnd@arndb.de>
Subject: Re: [patch 36/36] khugepaged
Date: Wed, 24 Feb 2010 22:58:25 +0100 [thread overview]
Message-ID: <20100224215825.GF29956@random.random> (raw)
In-Reply-To: <20100224132818.fb53d10d.akpm@linux-foundation.org>
On Wed, Feb 24, 2010 at 01:28:18PM -0800, Andrew Morton wrote:
> Sounds right. How much CPU consumption are we seeing from khugepaged?
zero cpu consumption, least on my laptop with default values. Maybe
default isn't aggressive enough but it will still cover very
long-lived allocations just fine. (for short lived allocations using
hugepages or not won't make a difference except during the first page
fault that will run some 50% faster, and cows that will be slower if
there's cache trashing)
> The above-quoted text would make a good addition to the (skimpy)
> changelog!
Agreed, I will integrate it... Also I need to check memcg in
khugepaged.
Thanks!
Andrea
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next prev parent reply other threads:[~2010-02-24 21:59 UTC|newest]
Thread overview: 60+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-21 14:10 [patch 00/36] Transparent Hugepage support #11 aarcange
2010-02-21 14:10 ` [patch 01/36] define MADV_HUGEPAGE aarcange
2010-02-21 14:10 ` [patch 02/36] compound_lock aarcange
2010-02-21 14:10 ` [patch 03/36] alter compound get_page/put_page aarcange
2010-02-21 14:10 ` [patch 04/36] update futex compound knowledge aarcange
2010-02-21 14:10 ` [patch 05/36] fix bad_page to show the real reason the page is bad aarcange
2010-02-21 14:10 ` [patch 06/36] clear compound mapping aarcange
2010-02-21 14:10 ` [patch 07/36] add native_set_pmd_at aarcange
2010-02-21 14:10 ` [patch 08/36] add pmd paravirt ops aarcange
2010-02-21 14:10 ` [patch 09/36] no paravirt version of pmd ops aarcange
2010-02-21 14:10 ` [patch 10/36] export maybe_mkwrite aarcange
2010-02-21 14:10 ` [patch 11/36] comment reminder in destroy_compound_page aarcange
2010-02-21 14:10 ` [patch 12/36] config_transparent_hugepage aarcange
2010-02-21 14:10 ` [patch 13/36] special pmd_trans_* functions aarcange
2010-02-21 14:10 ` [patch 14/36] add pmd mangling generic functions aarcange
2010-02-21 14:10 ` [patch 15/36] add pmd mangling functions to x86 aarcange
2010-02-21 14:10 ` [patch 16/36] bail out gup_fast on splitting pmd aarcange
2010-02-21 14:10 ` [patch 17/36] pte alloc trans splitting aarcange
2010-02-21 14:10 ` [patch 18/36] add pmd mmu_notifier helpers aarcange
2010-02-21 14:10 ` [patch 19/36] clear page compound aarcange
2010-02-21 14:10 ` [patch 20/36] add pmd_huge_pte to mm_struct aarcange
2010-02-21 14:10 ` [patch 21/36] split_huge_page_mm/vma aarcange
2010-02-21 14:10 ` [patch 22/36] split_huge_page paging aarcange
2010-02-21 14:10 ` [patch 23/36] clear_copy_huge_page aarcange
2010-02-21 14:10 ` [patch 24/36] kvm mmu transparent hugepage support aarcange
2010-02-21 14:10 ` [patch 25/36] _GFP_NO_KSWAPD aarcange
2010-02-22 17:53 ` Rik van Riel
2010-02-22 18:00 ` Andrea Arcangeli
2010-02-22 18:02 ` Avi Kivity
2010-03-01 12:14 ` Mel Gorman
2010-02-21 14:10 ` [patch 26/36] dont alloc harder for gfp nomemalloc even if nowait aarcange
2010-02-22 17:54 ` Rik van Riel
2010-02-21 14:10 ` [patch 27/36] transparent hugepage core aarcange
2010-02-21 14:10 ` [patch 28/36] adapt to mm_counter in -mm aarcange
2010-02-22 17:54 ` Rik van Riel
2010-02-21 14:10 ` [patch 29/36] page anon_vma aarcange
2010-02-22 17:55 ` Rik van Riel
2010-02-21 14:10 ` [patch 30/36] verify pmd_trans_huge isnt leaking aarcange
2010-02-22 17:56 ` Rik van Riel
2010-02-21 14:10 ` [patch 31/36] madvise(MADV_HUGEPAGE) aarcange
2010-02-21 14:10 ` [patch 32/36] pmd_trans_huge migrate bugcheck aarcange
2010-02-21 14:10 ` [patch 33/36] memcg compound aarcange
2010-02-21 14:10 ` [patch 34/36] memcg huge memory aarcange
2010-02-21 14:10 ` [patch 35/36] transparent hugepage vmstat aarcange
2010-02-21 14:10 ` [patch 36/36] khugepaged aarcange
2010-02-23 7:58 ` KAMEZAWA Hiroyuki
2010-02-23 8:51 ` KAMEZAWA Hiroyuki
2010-02-23 14:26 ` Andrea Arcangeli
2010-02-23 23:57 ` KAMEZAWA Hiroyuki
2010-02-24 20:11 ` Andrew Morton
2010-02-24 20:28 ` Rik van Riel
2010-02-24 20:52 ` Andrew Morton
2010-02-24 20:57 ` Rik van Riel
2010-02-24 21:12 ` Andrew Morton
2010-02-24 21:24 ` Rik van Riel
2010-02-24 21:28 ` Andrew Morton
2010-02-24 21:58 ` Andrea Arcangeli [this message]
2010-02-24 22:52 ` Andrea Arcangeli
2010-02-24 22:56 ` Rik van Riel
2010-02-22 10:22 ` [patch 00/36] Transparent Hugepage support #11 Andrea Arcangeli
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