On Tue, 2007-11-06 at 14:13 -0800, Brad Dameron wrote: > On Wed, 2007-11-07 at 08:51 +1100, Leigh Sharpe wrote: > > I'm using e1000 cards. > > According to oprofile, around 50% of the time is spent in the e1000 > > driver. > > Given that my load average is still under 0.5, I suspect I've got > > plenty of room for the driver to handle more traffic before I need to > > worry too much. > > > > > > > > ______________________________________________________________________ > > From: Vaidas M [mailto:admin@xxxxxx] > > Sent: Tuesday, 6 November 2007 9:32 PM > > To: Leigh Sharpe > > Subject: RE: Lowering CPU utilisation > > > > > > > > What kind of NIC you are using? > > > > I suggest you to use cards with NAPI featured in driver. > > > > > > > > _ _ _ _ _ _ _ __ ___ ____ _____ > > > > Vaidas M. > > > > > > > > > > From: bridge-bounces@xxxxxxxxxxxxxxxxxxxxxxxxxx > > [mailto:bridge-bounces@xxxxxxxxxxxxxxxxxxxxxxxxxx] On Behalf Of Leigh > > Sharpe > > Sent: Thursday, November 01, 2007 12:00 AM > > To: bridge@xxxxxxxxxxxxxxxxxxxxxxxxxx > > Subject: Lowering CPU utilisation > > > > > > > > > > Hi All, > > > > > > I have a box with 12 bridges on it, each of which has 2 ports. > > > > > > When the traffic level on the box reaches around 15-20Mbps on each > > bridge, my CPU utilisation gets to about 90-95%. > > > > > > I would like to avoid working the CPU that hard. Is there anything > > which can be done to get the CPU utlilisation down a bit? I have plans > > for an even bigger bridge, but these results indicate that it may not > > scale quite that well. > > > > > > > > > > > > Regards, > > Leigh > > > > > I assume you are using Linux. Try setting these in your /etc/sysctl.conf > file. > > # increase TCP max buffer size > net.core.rmem_max = 8388608 > net.core.wmem_max = 8388608 > # increase Linux autotuning TCP buffer limits > # min, default, and max number of bytes to use > net.ipv4.tcp_mem = 8388608 8388608 8388608 > net.ipv4.tcp_rmem = 4096 1048576 8388608 > net.ipv4.tcp_wmem = 4096 65535 8388608 > net.core.optmem_max = 40960 > > > Then load them with sysctl -p command. > > Hope this helps. Oops. Too many lists. Of course your using Linux. Brad Dameron Senior Systems Engineer Clearw're _______________________________________________ Bridge mailing list Bridge@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/bridge
