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From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: "David S. Miller" <davem@redhat.com>
Cc: <anton@samba.org>, <billfink@mindspring.com>,
	<linuxppc-dev@lists.linuxppc.org>
Subject: Re: GigE Performance Comparison of GMAC and SUNGEM Drivers
Date: Wed, 21 Nov 2001 02:25:57 +0100	[thread overview]
Message-ID: <20011121012557.25248@smtp.adsl.oleane.com> (raw)
In-Reply-To: <20011120.161937.118616800.davem@redhat.com>


>As a result GEM sends pause frames when there is even the slightest
>amount of DMA traffic is has to compete with.  On a 33Mhz/32-bit PCI
>bus, it is sending pause frames all the time even if it is the only
>agent making use of the bus.

Ok. At least, the UniNorth version runs on a 66Mhz bus directly
hooked to the CPU bus within the north bridge. The only other device
sharing that PCI segment is FireWire (well, it's a bandwidth hog
too be more rarely used so far).

Thanks for the clarification.

Ben.


** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/

  reply	other threads:[~2001-11-21  1:25 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2001-11-18  6:45 GigE Performance Comparison of GMAC and SUNGEM Drivers Bill Fink
2001-11-19  0:15 ` Anton Blanchard
2001-11-19 12:54   ` Benjamin Herrenschmidt
2001-11-20  6:34     ` Bill Fink
2001-11-20 12:02       ` Benjamin Herrenschmidt
2001-11-20 19:50         ` David S. Miller
2001-11-21  0:05           ` benh
2001-11-21  0:19             ` David S. Miller
2001-11-21  1:25               ` Benjamin Herrenschmidt [this message]
2001-11-21  4:17               ` Bill Fink
2001-11-21  3:46   ` Bill Fink
2001-11-21  5:36     ` Anton Blanchard

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