From: Andi Kleen <[EMAIL PROTECTED]> Date: 20 Aug 2007 01:27:35 +0200
> "Felix Marti" <[EMAIL PROTECTED]> writes: > > > what benefits does the TSO infrastructure give the > > non-TSO capable devices? > > It improves performance on software queueing devices between guests > and hypervisors. This is a more and more important application these > days. Even when the system running the Hypervisor has a non TSO > capable device in the end it'll still save CPU cycles this way. Right now > virtualized IO tends to much more CPU intensive than direct IO so any > help it can get is beneficial. > > It also makes loopback faster, although given that's probably not that > useful. > > And a lot of the "TSO infrastructure" was needed for zero copy TX anyways, > which benefits most reasonable modern NICs (anything with hardware > checksumming) And also, you can enable TSO generation for a non-TSO-hw device and get all of the segmentation overhead reduction gains which works out as a pure win as long as the device can at a minimum do checksumming. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
