From mboxrd@z Thu Jan 1 00:00:00 1970 From: Benjamin Herrenschmidt To: "David S. Miller" Cc: , , Subject: Re: GigE Performance Comparison of GMAC and SUNGEM Drivers Date: Wed, 21 Nov 2001 02:25:57 +0100 Message-Id: <20011121012557.25248@smtp.adsl.oleane.com> In-Reply-To: <20011120.161937.118616800.davem@redhat.com> References: <20011120.161937.118616800.davem@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Sender: owner-linuxppc-dev@lists.linuxppc.org List-Id: >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/