Anders Boström [off-list ref]

Sent: Wednesday, January 20, 2010 5:27 PM
To: Jie Yang
Cc: ben@decadent.org.uk; netdev@vger.kernel.org;
565404@bugs.debian.org; Xiong Huang
Subject: Re: Bug#565404: linux-image-2.6.26-2-amd64: atl1e:
TSO is broken

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"JY" == Jie Yang [off-list ref] writes:

 JY> Anders Boström [off-list ref] wrote:
 >> It is an ASUS M4A78 PRO motherboard with the Atheros  >>
AR8121/AR8113/AR8114 on-board.
 >>
 >> >> ~25Mbyte/s performance. I get ~5000 retransmitted
packets  >> per GByte  >> data, according to RetransSegs in

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/proc/net/snmp . wireshark in the  >> client show that the

 >> server send out a sequence of frames. All but the  >>
last  >> one are 1500 bytes IP-packets. The last one is
shorter, but  >> the  >> IP-header still say 1500 byte. The
client then  >> requests retransmit,  >> and the
retransmitted frame arrives  >> with correct IP-header.

 JY> i just test it on Linux localhost.localdomain
2.6.31.5-127.fc12.x86_64 #1 SMP Sat Nov 7 21:11:14 EST 2009
x86_64 x86_64 x86_64 GNU/Linux.
 JY> with hardware, Atheros AR8121/AR8113/AR8114 PCI-E
Ethernet Controller (rev b0)  JY> device id : 1969:1026 (rev b0)

 JY> i upload/download a 382M it work well with retransmit packet:

Have you tested NFS over TCP? The block-size the application
uses can have an effect on this. What application did you
use? Block-size?

yes, I tested NFS over TCP.