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 rx-checksumming: on tx-checksumming: on scatter-gather: on 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 utilization. I was expecting a god thruput and low CPU utilization at the same time. Any suggestions ? Thanx tomar - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
