On Tue, 07 Mar 2006 13:44:51 -0800 Matt Leininger <[EMAIL PROTECTED]> wrote:
> On Mon, 2006-03-06 at 19:13 -0800, Shirley Ma wrote: > > > > > More likely you are getting hit by the fact that TSO prevents the > > congestion > > window from increasing properly. This was fixed in 2.6.15 (around mid > > of Nov 2005). > > > > Yep, I noticed the same problem. After updating to the new kernel, the > > performance are much better, but it's still lower than before. > > Here is an updated version of OpenIB IPoIB performance for various > kernels with and without one of the TSO patches. The netperf > performance for the latest kernels has not improved the TSO performance > drop. > > Any comments or suggestions would be appreciated. > > - Matt Configuration information? like did you increase the tcp_rmem, tcp_wmem? Tcpdump traces of what is being sent and available window? Is IB using NAPI or just doing netif_rx()? - 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
