From: "David S. Miller" <davem@davemloft.net>
To: Linus Torvalds <torvalds@osdl.org>
Cc: arjan@infradead.org, paulus@samba.org, clameter@sgi.com,
akpm@osdl.org, linux-ia64@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: Prezeroing V2 [0/3]: Why and When it works
Date: Mon, 27 Dec 2004 22:50:57 +0000 [thread overview]
Message-ID: <20041227145057.4c5cd651.davem@davemloft.net> (raw)
In-Reply-To: <Pine.LNX.4.58.0412241018430.2654@ppc970.osdl.org>
On Fri, 24 Dec 2004 10:21:24 -0800 (PST)
Linus Torvalds <torvalds@osdl.org> wrote:
> Absolutely. I would want to see some real benchmarks before we do this.
> Not just some microbenchmark of "how many page faults can we take without
> _using_ the page at all".
Here's my small contribution. I did three "make -j3 vmlinux" timed
runs, one running a kernel without the pre-zeroing stuff applied,
one with it applied. It did shave a few seconds off the build
consistently. Here is the before:
real 8m35.248s
user 15m54.132s
sys 1m1.098s
real 8m32.202s
user 15m54.329s
sys 1m0.229s
real 8m31.932s
user 15m54.160s
sys 1m0.245s
and here is the after:
real 8m29.375s
user 15m43.296s
sys 0m59.549s
real 8m28.213s
user 15m39.819s
sys 0m58.790s
real 8m26.140s
user 15m44.145s
sys 0m58.872s
WARNING: multiple messages have this Message-ID (diff)
From: "David S. Miller" <davem@davemloft.net>
To: Linus Torvalds <torvalds@osdl.org>
Cc: arjan@infradead.org, paulus@samba.org, clameter@sgi.com,
akpm@osdl.org, linux-ia64@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: Prezeroing V2 [0/3]: Why and When it works
Date: Mon, 27 Dec 2004 14:50:57 -0800 [thread overview]
Message-ID: <20041227145057.4c5cd651.davem@davemloft.net> (raw)
In-Reply-To: <Pine.LNX.4.58.0412241018430.2654@ppc970.osdl.org>
On Fri, 24 Dec 2004 10:21:24 -0800 (PST)
Linus Torvalds <torvalds@osdl.org> wrote:
> Absolutely. I would want to see some real benchmarks before we do this.
> Not just some microbenchmark of "how many page faults can we take without
> _using_ the page at all".
Here's my small contribution. I did three "make -j3 vmlinux" timed
runs, one running a kernel without the pre-zeroing stuff applied,
one with it applied. It did shave a few seconds off the build
consistently. Here is the before:
real 8m35.248s
user 15m54.132s
sys 1m1.098s
real 8m32.202s
user 15m54.329s
sys 1m0.229s
real 8m31.932s
user 15m54.160s
sys 1m0.245s
and here is the after:
real 8m29.375s
user 15m43.296s
sys 0m59.549s
real 8m28.213s
user 15m39.819s
sys 0m58.790s
real 8m26.140s
user 15m44.145s
sys 0m58.872s
WARNING: multiple messages have this Message-ID (diff)
From: "David S. Miller" <davem@davemloft.net>
To: Linus Torvalds <torvalds@osdl.org>
Cc: arjan@infradead.org, paulus@samba.org, clameter@sgi.com,
akpm@osdl.org, linux-ia64@vger.kernel.org, linux-mm@kvack.org,
linux-kernel@vger.kernel.org
Subject: Re: Prezeroing V2 [0/3]: Why and When it works
Date: Mon, 27 Dec 2004 14:50:57 -0800 [thread overview]
Message-ID: <20041227145057.4c5cd651.davem@davemloft.net> (raw)
In-Reply-To: <Pine.LNX.4.58.0412241018430.2654@ppc970.osdl.org>
On Fri, 24 Dec 2004 10:21:24 -0800 (PST)
Linus Torvalds <torvalds@osdl.org> wrote:
> Absolutely. I would want to see some real benchmarks before we do this.
> Not just some microbenchmark of "how many page faults can we take without
> _using_ the page at all".
Here's my small contribution. I did three "make -j3 vmlinux" timed
runs, one running a kernel without the pre-zeroing stuff applied,
one with it applied. It did shave a few seconds off the build
consistently. Here is the before:
real 8m35.248s
user 15m54.132s
sys 1m1.098s
real 8m32.202s
user 15m54.329s
sys 1m0.229s
real 8m31.932s
user 15m54.160s
sys 1m0.245s
and here is the after:
real 8m29.375s
user 15m43.296s
sys 0m59.549s
real 8m28.213s
user 15m39.819s
sys 0m58.790s
real 8m26.140s
user 15m44.145s
sys 0m58.872s
--
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next prev parent reply other threads:[~2004-12-27 22:50 UTC|newest]
Thread overview: 268+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-15 2:34 [very very drafty] prezeroing to increase the page fault rate Christoph Lameter
2004-12-15 21:21 ` Robin Holt
2004-12-15 21:58 ` Christoph Lameter
2004-12-15 22:00 ` Christoph Lameter
2004-12-16 0:25 ` Nick Piggin
2004-12-16 0:41 ` Christoph Lameter
2004-12-16 0:41 ` Linus Torvalds
2004-12-16 0:46 ` Christoph Lameter
2004-12-16 0:50 ` Nick Piggin
2004-12-16 0:54 ` Christoph Lameter
2004-12-16 1:18 ` Linus Torvalds
2004-12-16 1:44 ` Christoph Lameter
2004-12-16 1:55 ` Linus Torvalds
2004-12-16 2:17 ` Nick Piggin
2004-12-16 7:59 ` Nick Piggin
2004-12-16 16:27 ` Christoph Lameter
2004-12-16 18:38 ` Luck, Tony
2004-12-16 22:37 ` Nick Piggin
2004-12-21 19:55 ` Increase page fault rate by prezeroing V1 [0/3]: Overview Christoph Lameter
2004-12-21 19:55 ` Christoph Lameter
2004-12-21 19:55 ` Christoph Lameter
2004-12-21 19:55 ` Christoph Lameter
2004-12-21 19:56 ` Increase page fault rate by prezeroing V1 [1/3]: Introduce __GFP_ZERO Christoph Lameter
2004-12-21 19:56 ` Christoph Lameter
2004-12-21 19:56 ` Christoph Lameter
2004-12-21 19:56 ` Christoph Lameter
2004-12-21 19:57 ` Increase page fault rate by prezeroing V1 [2/3]: zeroing and scrubd Christoph Lameter
2004-12-21 19:57 ` Christoph Lameter
2004-12-21 19:57 ` Christoph Lameter
2005-01-01 2:22 ` Increase page fault rate by prezeroing V1 [2/3]: zeroing and Nick Piggin
2005-01-01 2:22 ` Increase page fault rate by prezeroing V1 [2/3]: zeroing and scrubd Nick Piggin
2005-01-01 2:55 ` pmarques
2005-01-01 2:55 ` pmarques
2004-12-21 19:57 ` Christoph Lameter
2004-12-21 19:57 ` Increase page fault rate by prezeroing V1 [3/3]: Altix SN2 BTE Zeroing Christoph Lameter
2004-12-21 19:57 ` Increase page fault rate by prezeroing V1 [3/3]: Altix SN2 BTE Christoph Lameter
2004-12-21 19:57 ` Increase page fault rate by prezeroing V1 [3/3]: Altix SN2 BTE Zeroing Christoph Lameter
2004-12-21 19:57 ` Christoph Lameter
2004-12-22 12:46 ` Robin Holt
2004-12-22 12:46 ` Robin Holt
2004-12-22 19:56 ` Increase page fault rate by prezeroing V1 [3/3]: Altix SN2 BTE Christoph Lameter
2004-12-22 19:56 ` Increase page fault rate by prezeroing V1 [3/3]: Altix SN2 BTE Zeroing Christoph Lameter
2004-12-23 19:29 ` Prezeroing V2 [0/3]: Why and When it works Christoph Lameter
2004-12-23 19:29 ` Christoph Lameter
2004-12-23 19:29 ` Christoph Lameter
2004-12-23 19:33 ` Prezeroing V2 [1/4]: __GFP_ZERO / clear_page() removal Christoph Lameter
2004-12-23 19:33 ` Christoph Lameter
2004-12-23 19:33 ` Christoph Lameter
2004-12-23 19:33 ` Prezeroing V2 [2/4]: add second parameter to clear_page() for all Christoph Lameter
2004-12-23 19:33 ` Prezeroing V2 [2/4]: add second parameter to clear_page() for all arches Christoph Lameter
2004-12-23 19:33 ` Christoph Lameter
2004-12-24 8:33 ` Pavel Machek
2004-12-24 8:33 ` Pavel Machek
2004-12-24 8:33 ` Pavel Machek
2004-12-24 16:18 ` Prezeroing V2 [2/4]: add second parameter to clear_page() for Christoph Lameter
2004-12-24 16:18 ` Prezeroing V2 [2/4]: add second parameter to clear_page() for all arches Christoph Lameter
2004-12-24 16:18 ` Christoph Lameter
2004-12-24 16:27 ` Pavel Machek
2004-12-24 16:27 ` Pavel Machek
2004-12-24 16:27 ` Pavel Machek
2004-12-24 17:02 ` Prezeroing V2 [2/4]: add second parameter to clear_page() for David S. Miller
2004-12-24 17:02 ` Prezeroing V2 [2/4]: add second parameter to clear_page() for all arches David S. Miller
2004-12-24 17:02 ` David S. Miller
2004-12-24 17:05 ` Prezeroing V2 [2/4]: add second parameter to clear_page() for David S. Miller
2004-12-24 17:05 ` Prezeroing V2 [2/4]: add second parameter to clear_page() for all arches David S. Miller
2004-12-24 17:05 ` David S. Miller
2004-12-27 22:48 ` Prezeroing V2 [2/4]: add second parameter to clear_page() for David S. Miller
2004-12-27 22:48 ` Prezeroing V2 [2/4]: add second parameter to clear_page() for all arches David S. Miller
2004-12-27 22:48 ` David S. Miller
2005-01-03 17:52 ` Prezeroing V2 [2/4]: add second parameter to clear_page() for Christoph Lameter
2005-01-03 17:52 ` Prezeroing V2 [2/4]: add second parameter to clear_page() for all arches Christoph Lameter
2005-01-03 17:52 ` Christoph Lameter
2005-01-01 10:24 ` Prezeroing V2 [2/4]: add second parameter to clear_page() for Geert Uytterhoeven
2005-01-01 10:24 ` Prezeroing V2 [2/4]: add second parameter to clear_page() for all arches Geert Uytterhoeven
2005-01-01 10:24 ` Geert Uytterhoeven
2005-01-04 23:12 ` Prezeroing V3 [0/4]: Discussion and i386 performance tests Christoph Lameter
2005-01-04 23:12 ` Christoph Lameter
2005-01-04 23:12 ` Christoph Lameter
2005-01-04 23:13 ` Prezeroing V3 [1/4]: Allow request for zeroed memory Christoph Lameter
2005-01-04 23:13 ` Christoph Lameter
2005-01-04 23:13 ` Christoph Lameter
2005-01-04 23:45 ` Dave Hansen
2005-01-04 23:45 ` Dave Hansen
2005-01-04 23:45 ` Dave Hansen
2005-01-05 1:16 ` Christoph Lameter
2005-01-05 1:16 ` Christoph Lameter
2005-01-05 1:16 ` Christoph Lameter
2005-01-05 1:26 ` Linus Torvalds
2005-01-05 1:26 ` Linus Torvalds
2005-01-05 1:26 ` Linus Torvalds
2005-01-05 23:11 ` Christoph Lameter
2005-01-05 23:11 ` Christoph Lameter
2005-01-05 23:11 ` Christoph Lameter
2005-01-05 0:34 ` Linus Torvalds
2005-01-05 0:34 ` Linus Torvalds
2005-01-05 0:34 ` Linus Torvalds
2005-01-05 0:47 ` Andrew Morton
2005-01-05 0:47 ` Andrew Morton
2005-01-05 0:47 ` Andrew Morton
2005-01-05 1:15 ` Christoph Lameter
2005-01-05 1:15 ` Christoph Lameter
2005-01-05 1:15 ` Christoph Lameter
2005-01-08 21:12 ` Hugh Dickins
2005-01-08 21:12 ` Hugh Dickins
2005-01-08 21:12 ` Hugh Dickins
2005-01-08 21:56 ` David S. Miller
2005-01-08 21:56 ` David S. Miller
2005-01-08 21:56 ` David S. Miller
2005-01-21 20:09 ` alloc_zeroed_user_highpage to fix the clear_user_highpage issue Christoph Lameter
2005-01-21 20:09 ` Christoph Lameter
2005-01-21 20:09 ` Christoph Lameter
2005-02-09 9:58 ` [Patch] Fix oops in alloc_zeroed_user_highpage() when page is NULL Michael Ellerman
2005-02-09 9:58 ` Michael Ellerman
2005-02-09 9:58 ` Michael Ellerman
2005-02-10 0:38 ` Christoph Lameter
2005-01-21 20:12 ` Extend clear_page by an order parameter Christoph Lameter
2005-01-21 20:12 ` Christoph Lameter
2005-01-21 20:12 ` Christoph Lameter
2005-01-21 22:29 ` Paul Mackerras
2005-01-21 22:29 ` Paul Mackerras
2005-01-21 22:29 ` Paul Mackerras
2005-01-21 23:48 ` Christoph Lameter
2005-01-21 23:48 ` Christoph Lameter
2005-01-21 23:48 ` Christoph Lameter
2005-01-22 0:35 ` Paul Mackerras
2005-01-22 0:35 ` Paul Mackerras
2005-01-22 0:35 ` Paul Mackerras
2005-01-22 0:43 ` Andrew Morton
2005-01-22 0:43 ` Andrew Morton
2005-01-22 0:43 ` Andrew Morton
2005-01-22 1:08 ` Paul Mackerras
2005-01-22 1:08 ` Paul Mackerras
2005-01-22 1:08 ` Paul Mackerras
2005-01-22 1:20 ` Roman Zippel
2005-01-22 1:20 ` Roman Zippel
2005-01-22 1:20 ` Roman Zippel
2005-01-22 1:25 ` Paul Mackerras
2005-01-22 1:25 ` Paul Mackerras
2005-01-22 1:25 ` Paul Mackerras
2005-01-22 1:54 ` Christoph Lameter
2005-01-22 1:54 ` Christoph Lameter
2005-01-22 1:54 ` Christoph Lameter
2005-01-22 2:53 ` Paul Mackerras
2005-01-22 2:53 ` Paul Mackerras
2005-01-22 2:53 ` Paul Mackerras
2005-01-23 7:45 ` Andrew Morton
2005-01-23 7:45 ` Andrew Morton
2005-01-23 7:45 ` Andrew Morton
2005-01-24 16:37 ` Christoph Lameter
2005-01-24 16:37 ` Christoph Lameter
2005-01-24 16:37 ` Christoph Lameter
2005-01-24 20:23 ` David S. Miller
2005-01-24 20:23 ` David S. Miller
2005-01-24 20:23 ` David S. Miller
2005-01-24 20:33 ` Christoph Lameter
2005-01-24 20:33 ` Christoph Lameter
2005-01-24 20:33 ` Christoph Lameter
2005-01-21 20:15 ` A scrub daemon (prezeroing) Christoph Lameter
2005-01-21 20:15 ` Christoph Lameter
2005-01-10 17:16 ` Prezeroing V3 [1/4]: Allow request for zeroed memory Christoph Lameter
2005-01-10 17:16 ` Christoph Lameter
2005-01-10 17:16 ` Christoph Lameter
2005-01-10 18:13 ` Linus Torvalds
2005-01-10 18:13 ` Linus Torvalds
2005-01-10 18:13 ` Linus Torvalds
2005-01-10 20:17 ` Christoph Lameter
2005-01-10 20:17 ` Christoph Lameter
2005-01-10 20:17 ` Christoph Lameter
2005-01-10 23:53 ` Prezeroing V4 [0/4]: Overview Christoph Lameter
2005-01-10 23:53 ` Christoph Lameter
2005-01-10 23:53 ` Christoph Lameter
2005-01-10 23:54 ` Prezeroing V4 [1/4]: Arch specific page zeroing during page fault Christoph Lameter
2005-01-10 23:54 ` Christoph Lameter
2005-01-10 23:54 ` Christoph Lameter
2005-01-11 0:41 ` Chris Wright
2005-01-11 0:41 ` Chris Wright
2005-01-11 0:41 ` Chris Wright
2005-01-11 0:46 ` Prezeroing V4 [1/4]: Arch specific page zeroing during page Christoph Lameter
2005-01-11 0:46 ` Prezeroing V4 [1/4]: Arch specific page zeroing during page fault Christoph Lameter
2005-01-11 0:46 ` Christoph Lameter
2005-01-11 0:49 ` Chris Wright
2005-01-11 0:49 ` Chris Wright
2005-01-11 0:49 ` Chris Wright
2005-01-10 23:55 ` Prezeroing V4 [2/4]: Zeroing implementation Christoph Lameter
2005-01-10 23:55 ` Christoph Lameter
2005-01-10 23:55 ` Christoph Lameter
2005-01-10 23:55 ` Prezeroing V4 [3/4]: Altix SN2 BTE zero driver Christoph Lameter
2005-01-10 23:55 ` Christoph Lameter
2005-01-10 23:55 ` Christoph Lameter
2005-01-10 23:56 ` Prezeroing V4 [4/4]: Extend clear_page to take an order parameter Christoph Lameter
2005-01-10 23:56 ` Christoph Lameter
2005-01-10 23:56 ` Christoph Lameter
2005-01-04 23:14 ` Prezeroing V3 [2/4]: Extension of clear_page to take an order Christoph Lameter
2005-01-04 23:14 ` Prezeroing V3 [2/4]: Extension of clear_page to take an order parameter Christoph Lameter
2005-01-04 23:14 ` Christoph Lameter
2005-01-05 23:25 ` Prezeroing V3 [2/4]: Extension of clear_page to take an order Christoph Lameter
2005-01-05 23:25 ` Prezeroing V3 [2/4]: Extension of clear_page to take an order parameter Christoph Lameter
2005-01-05 23:25 ` Christoph Lameter
2005-01-06 13:52 ` Andi Kleen
2005-01-06 17:47 ` Christoph Lameter
2005-01-04 23:15 ` Prezeroing V3 [3/4]: Page zeroing through kscrubd Christoph Lameter
2005-01-04 23:15 ` Christoph Lameter
2005-01-04 23:15 ` Christoph Lameter
2005-01-04 23:16 ` Prezeroing V3 [4/4]: Driver for hardware zeroing on Altix Christoph Lameter
2005-01-04 23:16 ` Christoph Lameter
2005-01-04 23:16 ` Christoph Lameter
2005-01-05 2:16 ` Andi Kleen
2005-01-05 16:24 ` Christoph Lameter
2004-12-23 19:34 ` Prezeroing V2 [3/4]: Add support for ZEROED and NOT_ZEROED free maps Christoph Lameter
2004-12-23 19:34 ` Christoph Lameter
2004-12-23 19:34 ` Christoph Lameter
2004-12-23 19:35 ` Prezeroing V2 [4/4]: Hardware Zeroing through SGI BTE Christoph Lameter
2004-12-23 19:35 ` Christoph Lameter
2004-12-23 19:35 ` Christoph Lameter
2004-12-23 20:08 ` Prezeroing V2 [1/4]: __GFP_ZERO / clear_page() removal Brian Gerst
2004-12-23 20:08 ` Brian Gerst
2004-12-23 20:08 ` Brian Gerst
2004-12-24 16:24 ` Christoph Lameter
2004-12-24 16:24 ` Christoph Lameter
2004-12-24 16:24 ` Christoph Lameter
2004-12-23 19:49 ` Prezeroing V2 [0/3]: Why and When it works Arjan van de Ven
2004-12-23 19:49 ` Arjan van de Ven
2004-12-23 19:49 ` Arjan van de Ven
2004-12-23 20:57 ` Matt Mackall
2004-12-23 20:57 ` Matt Mackall
2004-12-23 20:57 ` Matt Mackall
2004-12-23 21:01 ` Paul Mackerras
2004-12-23 21:01 ` Paul Mackerras
2004-12-23 21:01 ` Paul Mackerras
2004-12-23 21:11 ` Paul Mackerras
2004-12-23 21:11 ` Paul Mackerras
2004-12-23 21:11 ` Paul Mackerras
2004-12-23 21:37 ` Andrew Morton
2004-12-23 21:37 ` Andrew Morton
2004-12-23 21:37 ` Andrew Morton
2004-12-23 23:00 ` Paul Mackerras
2004-12-23 23:00 ` Paul Mackerras
2004-12-23 23:00 ` Paul Mackerras
2004-12-23 21:48 ` Linus Torvalds
2004-12-23 21:48 ` Linus Torvalds
2004-12-23 21:48 ` Linus Torvalds
2004-12-23 22:34 ` Zwane Mwaikambo
2004-12-23 22:34 ` Zwane Mwaikambo
2004-12-23 22:34 ` Zwane Mwaikambo
2004-12-24 9:14 ` Arjan van de Ven
2004-12-24 9:14 ` Arjan van de Ven
2004-12-24 9:14 ` Arjan van de Ven
2004-12-24 18:21 ` Linus Torvalds
2004-12-24 18:21 ` Linus Torvalds
2004-12-24 18:21 ` Linus Torvalds
2004-12-24 18:57 ` Arjan van de Ven
2004-12-24 18:57 ` Arjan van de Ven
2004-12-24 18:57 ` Arjan van de Ven
2004-12-27 22:50 ` David S. Miller [this message]
2004-12-27 22:50 ` David S. Miller
2004-12-27 22:50 ` David S. Miller
2004-12-28 11:53 ` Marcelo Tosatti
2004-12-28 11:53 ` Marcelo Tosatti
2004-12-28 11:53 ` Marcelo Tosatti
2004-12-24 16:17 ` Christoph Lameter
2004-12-24 16:17 ` Christoph Lameter
2004-12-24 16:17 ` Christoph Lameter
2004-12-24 18:31 ` Increase page fault rate by prezeroing V1 [0/3]: Overview Andrea Arcangeli
2004-12-24 18:31 ` Andrea Arcangeli
2005-01-03 17:54 ` Christoph Lameter
2005-01-03 17:54 ` Christoph Lameter
[not found] <B8E391BBE9FE384DAA4C5C003888BE6F02900FBD@scsmsx401.amr.corp.intel.com.suse.lists.linux.kernel>
[not found] ` <41C20E3E.3070209@yahoo.com.au.suse.lists.linux.kernel>
[not found] ` <Pine.LNX.4.58.0412211154100.1313@schroedinger.engr.sgi.com.suse.lists.linux.kernel>
[not found] ` <Pine.LNX.4.58.0412231119540.31791@schroedinger.engr.sgi.com.suse.lists.linux.kernel>
2004-12-23 20:27 ` Prezeroing V2 [0/3]: Why and When it works Andi Kleen
2004-12-23 21:02 ` Christoph Lameter
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