On Tue, Nov 14, 2006 at 07:50:22PM +0100, Pieter de Goeje wrote: > 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? > All 8169 chipsets support 1024 Tx descriptors. > (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? > Attached. -- Regards, Pyun YongHyeon
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