From: "David S. Miller" <davem@redhat.com>
To: anton@samba.org
Cc: scott.feldman@intel.com, haveblue@us.ibm.com, hdierks@us.ibm.com,
dwg@au1.ibm.com, linux-kernel@vger.kernel.org,
milliner@us.ibm.com, ricardoz@us.ibm.com, twichell@us.ibm.com,
netdev@oss.sgi.com
Subject: Re: e1000 performance hack for ppc64 (Power4)
Date: Fri, 13 Jun 2003 18:34:40 -0700 (PDT) [thread overview]
Message-ID: <20030613.183440.41634090.davem@redhat.com> (raw)
In-Reply-To: <20030614005534.GF32097@krispykreme>
From: Anton Blanchard <anton@samba.org>
Date: Sat, 14 Jun 2003 10:55:34 +1000
What I think is happening is that we arent tripping the prefetch
logic. We should take a latency hit for only the first cacheline
at which point the host bridge decides to start prefetching for
us. If not then we take take the latency hit on each transaction.
It sounds like what happens is that the sub-cacheline word reads
don't trigger the prefetch, but the first PCI read multiple
transaction does.
next prev parent reply other threads:[~2003-06-14 1:24 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-06-13 23:52 e1000 performance hack for ppc64 (Power4) Feldman, Scott
2003-06-13 23:52 ` David S. Miller
2003-06-14 0:55 ` Anton Blanchard
2003-06-14 1:34 ` David S. Miller [this message]
2003-06-14 0:03 ` Anton Blanchard
-- strict thread matches above, loose matches on Subject: below --
2003-06-16 18:56 Feldman, Scott
2003-06-16 18:21 Feldman, Scott
2003-06-16 18:30 ` Dave Hansen
2003-06-15 14:40 Herman Dierks
2003-06-15 14:44 ` David S. Miller
2003-06-16 16:17 ` Nivedita Singhvi
2003-06-15 14:32 Herman Dierks
2003-06-13 22:13 Feldman, Scott
2003-06-13 17:03 Herman Dierks
2003-06-13 15:17 Herman Dierks
2003-06-13 16:21 ` Dave Hansen
2003-06-13 22:38 ` Anton Blanchard
2003-06-13 22:46 ` David S. Miller
2003-06-13 23:18 ` Anton Blanchard
2003-06-14 1:52 ` Lincoln Dale
2003-06-14 5:41 ` David S. Miller
2003-06-14 5:52 ` Lincoln Dale
2003-06-14 6:08 ` David S. Miller
2003-06-14 6:14 ` David S. Miller
2003-06-14 6:27 ` William Lee Irwin III
2003-06-14 17:08 ` Greg KH
2003-06-14 17:19 ` Greg KH
2003-06-14 17:21 ` Riley Williams
2003-06-15 3:01 ` David S. Miller
2003-06-14 5:16 ` Nivedita Singhvi
2003-06-14 5:36 ` David S. Miller
2003-06-13 1:16 Feldman, Scott
2003-06-13 23:15 ` Anton Blanchard
2003-06-12 3:32 David Gibson
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