On Fri, 16 Dec 2005 03:26:31 +0100 Andi Kleen <[EMAIL PROTECTED]> wrote:
> On Thu, Dec 15, 2005 at 08:35:32PM -0500, Bill Fink wrote: > > On Fri, 16 Dec 2005, Andi Kleen wrote: > > > > > > It appears that it is getting CPU starved for some reason (note the > > > > 43%/40% transmitter CPU usage versus the 99%/99% CPU usage for the > > > > 2.6.12.6 case). > > > > > > What happens when you turn off tso in ethtool? > > > > Thanks!!! That did the trick. > > TSO is still a bit of work in progress. The old 2.6.12 TSO code > actually ignored the congestion window and was illegal in benchmarks etc > (and might have even been dangerous to the internet). That was fixed, > but performance still didn't fully recover. It's a tricky problem. And it wasn't till 2.6.15 that we got the fix in to correctly increase cwnd with TSO. - 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
