On Tue, 2 Oct 2007 09:49:52 -0700 [EMAIL PROTECTED] (Larry McVoy) wrote: > On Tue, Oct 02, 2007 at 09:47:26AM -0700, Stephen Hemminger wrote: > > On Tue, 2 Oct 2007 09:25:34 -0700 > > [EMAIL PROTECTED] (Larry McVoy) wrote: > > > > > > If the server side is the source of the data, i.e, it's transfer is a > > > > write loop, then I get the bad behaviour. > > > > ... > > > > So is this a bug or intentional? > > > > > > For whatever it is worth, I believed that we used to get better > > > performance > > > from the same hardware. My guess is that it changed somewhere between > > > 2.6.15-1-k7 and 2.6.18-5-k7. > > > > For the period from 2.6.15 to 2.6.18, the kernel by default enabled TCP > > Appropriate Byte Counting. This caused bad performance on applications that > > did small writes. > > It's doing 1MB writes. > > Is there a sockopt to turn that off? Or /proc or something?
sysctl -w net.ipv4.tcp_abc=0 -- Stephen Hemminger <[EMAIL PROTECTED]> - 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
