El dom, 07-12-2008 a las 19:52 +0100, Jan Ceuleers escribió: > Arjan van de Ven wrote: > > Most offload features (TSO etc) end up helping (a little). Anything that > > makes the system more efficient will help; it's the "if you have less > > work to do > > you consume less power" concept. > > Exception tends to be TOE (total offloading), since TOE tends to be > > implemented > > by just another CPU, one on the card. This tends to be a loss in terms > > of power, > > because you now have 2 cpus slurping power, having just one tends to be > > more > > optimal. > > > > As for powertop suggesting this: I'm actually surprised these features > > arent > > on by default already. They should be.... > > If you have a specific one in mind, can you give some examples? It's easier > > to discuss such things on a specific case basis > > I have three machines with different ethernet chips in them. None of > them come with all of the offloading features that they support enabled > on boot. > > For example, the via-velocity in one machine supports only one offload > (which I now know is not hardware-assisted): > > [EMAIL PROTECTED]:~# ethtool -k eth0 > Offload parameters for eth0: > Cannot get device rx csum settings: Operation not supported > Cannot get device tx csum settings: Operation not supported > Cannot get device scatter-gather settings: Operation not supported > Cannot get device tcp segmentation offload settings: Operation not supported > Cannot get device udp large send offload settings: Operation not supported > rx-checksumming: off > tx-checksumming: off > scatter-gather: off > tcp segmentation offload: off > udp fragmentation offload: off > generic segmentation offload: off > > [EMAIL PROTECTED]:~# lspci -vv | grep Ethernet > 00:0e.0 Ethernet controller: VIA Technologies, Inc. VT6120/VT6121/VT6122 > Gigabit Ethernet Adapter (rev 11) >
Interesting, I have the following: [EMAIL PROTECTED] ~]# ethtool -k eth1 Offload parameters for eth1: rx-checksumming: on tx-checksumming: on scatter-gather: on tcp segmentation offload: off udp fragmentation offload: off generic segmentation offload: on 00:19.0 Ethernet controller: Intel Corporation 82566DC-2 Gigabit Network Connection (rev 02) Using the e1000e driver. How do I turn on the offload mechanisms?? -William _______________________________________________ Power mailing list [email protected] http://www.bughost.org/mailman/listinfo/power
