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. Brad Dameron Senior Systems Engineer Clearw're _______________________________________________ Bridge mailing list Bridge@xxxxxxxxxxxxxxxxxxxxxxxxxx https://lists.linux-foundation.org/mailman/listinfo/bridge
