Date: Tue, 14 Nov 2006 19:50:22 +0100 From: Pieter de Goeje <pieter@degoeje.nl> To: pyunyh@gmail.com Cc: freebsd-current@freebsd.org Subject: Re: Call for re(4) TSO/VLAN testers Message-ID: <200611141950.22588.pieter@degoeje.nl> In-Reply-To: <20061114000103.GA5517@cdnetworks.co.kr> References: <20061111011051.GB5233@cdnetworks.co.kr> <200611131637.57216.pieter@degoeje.nl> <20061114000103.GA5517@cdnetworks.co.kr>
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On Tuesday 14 November 2006 01:01, Pyun YongHyeon wrote: > ATM re(4) uses still small number of Tx descriptors(i.e. 64 entries) > due to the hardware limitation of 8139C+. 8169 family can have > up to 1024 Tx descriptors. If we want to use more Tx descriptors > on 8169 the internal structure should be modified to support both > 8139C+ and 8169. I guess it would require major Tx path overhaul. > Because I have just plain PCI 8169 hardware I can't sure increasing > number of Tx descriptors on re(4) help Tx performance of the driver. So the 8169 has 64 Tx descriptors and the 8169S 1024? (dmesg 6-stable) re0: <RealTek 8169S Single-chip Gigabit Ethernet> port 0xd000-0xd0ff mem 0xe8000000-0xe80000ff irq 17 at device 9.0 on pci0 miibus0: <MII bus> on re0 rgephy0: <RTL8169S/8110S media interface> on miibus0 rgephy0: 10baseT, 10baseT-FDX, 100baseTX, 100baseTX-FDX, 1000baseTX, 1000baseTX-FDX, auto > I guess 64 Tx descriptors are not sufficient to saturate giga bit > link. > Would please try attached patch and report the performance of patched > re(4) driver? Where can I find this patch? Regards, Pieter de Goeje
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