From: "Nikita V. Youshchenko" <yoush@cs.msu.su>
To: Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: Inter-process send()/recv() using zero-copy ?
Date: Wed, 23 Sep 2009 10:51:31 +0400 [thread overview]
Message-ID: <200909231051.31818@zigzag.lvk.cs.msu.su> (raw)
In-Reply-To: <20090923084314.78283f24@infradead.org>
> the problem you have is that
> 1) memory copies are cheap
> (say, 3000 cycles/page or less)
What about L1 cache pollution? Doesn't it change situation?
> 2) page table operations (mmap etc) are very expensive.
>
> these two combined tend to not make it a win to substitute simple
> copies with complex pagetable tricks.
next prev parent reply other threads:[~2009-09-23 6:51 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-09-23 6:01 Xavier Roche
2009-09-23 6:43 ` Arjan van de Ven
2009-09-23 6:51 ` Nikita V. Youshchenko [this message]
2009-09-23 7:04 ` Xavier Roche
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