From: Matthew Wilcox <matthew@wil.cx>
To: Denis Vlasenko <vda@port.imtp.ilyichevsk.odessa.ua>
Cc: Dave Jones <davej@redhat.com>, Matthew Wilcox <matthew@wil.cx>,
Brian Gerst <bgerst@didntduck.org>,
"Martin K. Petersen" <mkp@wildopensource.com>,
linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org,
akpm@osdl.org, tony.luck@intel.com
Subject: Re: [PATCH] General purpose zeroed page slab
Date: Thu, 14 Oct 2004 19:47:47 +0000 [thread overview]
Message-ID: <20041014194747.GV16153@parcelfarce.linux.theplanet.co.uk> (raw)
In-Reply-To: <200410142208.49831.vda@port.imtp.ilyichevsk.odessa.ua>
On Thu, Oct 14, 2004 at 10:08:49PM +0300, Denis Vlasenko wrote:
> BTW, zeroing with non-temporal stores may be a huge win here.
> It is 300% faster on Athlon.
That assumes the page isn't going to be reused quickly. The point of
slab is that the page does get reused quickly. So you *want* the data
to be hot in cache.
--
"Next the statesmen will invent cheap lies, putting the blame upon
the nation that is attacked, and every man will be glad of those
conscience-soothing falsities, and will diligently study them, and refuse
to examine any refutations of them; and thus he will by and by convince
himself that the war is just, and will thank God for the better sleep
he enjoys after this process of grotesque self-deception." -- Mark Twain
WARNING: multiple messages have this Message-ID (diff)
From: Matthew Wilcox <matthew@wil.cx>
To: Denis Vlasenko <vda@port.imtp.ilyichevsk.odessa.ua>
Cc: Dave Jones <davej@redhat.com>, Matthew Wilcox <matthew@wil.cx>,
Brian Gerst <bgerst@didntduck.org>,
"Martin K. Petersen" <mkp@wildopensource.com>,
linux-kernel@vger.kernel.org, linux-ia64@vger.kernel.org,
akpm@osdl.org, tony.luck@intel.com
Subject: Re: [PATCH] General purpose zeroed page slab
Date: Thu, 14 Oct 2004 20:47:47 +0100 [thread overview]
Message-ID: <20041014194747.GV16153@parcelfarce.linux.theplanet.co.uk> (raw)
In-Reply-To: <200410142208.49831.vda@port.imtp.ilyichevsk.odessa.ua>
On Thu, Oct 14, 2004 at 10:08:49PM +0300, Denis Vlasenko wrote:
> BTW, zeroing with non-temporal stores may be a huge win here.
> It is 300% faster on Athlon.
That assumes the page isn't going to be reused quickly. The point of
slab is that the page does get reused quickly. So you *want* the data
to be hot in cache.
--
"Next the statesmen will invent cheap lies, putting the blame upon
the nation that is attacked, and every man will be glad of those
conscience-soothing falsities, and will diligently study them, and refuse
to examine any refutations of them; and thus he will by and by convince
himself that the war is just, and will thank God for the better sleep
he enjoys after this process of grotesque self-deception." -- Mark Twain
next prev parent reply other threads:[~2004-10-14 19:47 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-10-14 16:50 [PATCH] General purpose zeroed page slab Martin K. Petersen
2004-10-14 16:50 ` Martin K. Petersen
2004-10-14 17:30 ` Brian Gerst
2004-10-14 17:30 ` Brian Gerst
2004-10-14 17:36 ` Matthew Wilcox
2004-10-14 17:36 ` Matthew Wilcox
2004-10-14 18:49 ` Dave Jones
2004-10-14 18:49 ` Dave Jones
2004-10-14 19:08 ` Denis Vlasenko
2004-10-14 19:08 ` Denis Vlasenko
2004-10-14 19:47 ` Matthew Wilcox [this message]
2004-10-14 19:47 ` Matthew Wilcox
2004-10-14 18:04 ` Andi Kleen
2004-10-14 18:04 ` Andi Kleen
2004-10-14 23:36 ` Adam Heath
2004-10-14 23:36 ` Adam Heath
2004-10-15 1:18 ` Andi Kleen
2004-10-15 1:18 ` Andi Kleen
2004-10-18 18:06 ` Martin K. Petersen
2004-10-18 18:06 ` Martin K. Petersen
2004-10-18 18:42 ` Matthew Wilcox
2004-10-18 18:42 ` Matthew Wilcox
2004-10-18 18:54 ` Martin K. Petersen
2004-10-18 18:54 ` Martin K. Petersen
2004-10-18 19:06 ` Andi Kleen
2004-10-18 19:06 ` Andi Kleen
2004-10-18 21:06 ` Andi Kleen
2004-10-18 21:06 ` Andi Kleen
2004-10-18 19:03 ` Luck, Tony
2004-10-18 19:03 ` Luck, Tony
2004-10-18 19:14 ` Matthew Wilcox
2004-10-18 19:14 ` Matthew Wilcox
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