From: "David S. Miller" <davem@redhat.com>
To: manfred@colorfullife.com
Cc: wli@holomorphy.com, anton@samba.org, linux-kernel@vger.kernel.org
Subject: Re: 2.5.50-BK + 24 CPUs
Date: Mon, 09 Dec 2002 12:15:57 -0800 (PST) [thread overview]
Message-ID: <20021209.121557.17268348.davem@redhat.com> (raw)
In-Reply-To: <3DF4CCCE.7040407@colorfullife.com>
From: Manfred Spraul <manfred@colorfullife.com>
Date: Mon, 09 Dec 2002 18:03:10 +0100
Unfortunately zero-copy doesn't help to avoid the schedules:
Zero copy just avoid the copy to kernel - you still need one schedule
for each page to be transfered.
The zerocopy patches copied up to 64k (or rather, 16 pages, something
like that) at once, that's going to lead to 16 times less schedules.
The 64k number was decided arbitrarily (it's what freebsd's pipe code
uses) and it can be experimented with.
next prev parent reply other threads:[~2002-12-09 20:11 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-08 21:22 2.5.50-BK + 24 CPUs Manfred Spraul
2002-12-08 21:28 ` William Lee Irwin III
2002-12-08 23:22 ` David S. Miller
2002-12-08 23:01 ` William Lee Irwin III
2002-12-09 17:03 ` Manfred Spraul
2002-12-09 20:15 ` David S. Miller [this message]
2002-12-09 21:12 ` Manfred Spraul
-- strict thread matches above, loose matches on Subject: below --
2002-12-08 13:09 Anton Blanchard
2002-12-08 14:49 ` Rik van Riel
2002-12-08 16:45 ` Rik van Riel
2002-12-09 14:08 ` Anton Blanchard
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