TSO thruput is low !
From: Nagendra Singh Tomar (email@example.com)
Date: Tue Aug 12 2003 - 06:37:58 EST
I just downloaded 2.6.0-test2 from kernel.org to try the latest TSO
facility. I am having an intel 82545 card.
02:08.0 Ethernet controller: Intel Corp. 82545EM Gigabit Ethernet
Controller (rev 01)
ethtool -k eth2, yields
tcp segmentation offload: on
The other side is the same intel NIC on a 2.4.18 (redhat 8.0 kernel), so
TSO is not on.
I am using "ettcp -f 'M' -s -r -p 5003 -l 65535 -n 100000" command.
When I disable TSO with "ethtool -K eth2 tso off" I get around 100MBps
with 30-35% CPU utilization. With TSO on I get ~77MBps with 18-20% CPU
I was expecting a god thruput and low CPU utilization at the same time.
Any suggestions ?
To unsubscribe from this list: send the line "unsubscribe linux-net" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html