On Tue, Aug 7, 2012 at 7:51 AM, Gerhardus Geldenhuis <gerhardus.geldenh...@gmail.com> wrote: > Hi > > I am following an EMC Networker guide which is mentioning stopping > irqbalance as a service and setting affnity for all network interfaces that > that is faster than 1Gb. > > This is not something I have done before so learning rapidly. > > The logic behind it seems fine, and the Red Hat guide seems to suggest the > same: > http://docs.redhat.com/docs/en-US/Red_Hat_Enterprise_Linux/6/html/Performance_Tuning_Guide/s-cpu-irq.html > > However this guide is for 6 and I am using 5.8 so I am reading it with a > pinch of 5.8 salt. > > I have a number of questions: > 1. The server in question is virtual. Logically it would seem that setting > CPU affinity on virtualized infrastructure would have the same effect as on > physical infrastructure. Valid assumption? > > 2. The server is provisioned with 4 cpu's each with 1 core. However cat > /proc/irq/83/smp_affinity which is my interrupt for eth0 shows > 00000000,00000000,00000000,00000000,00000000,00000000,00000000,00000001 > (with irqbalance turned off ) > I am not yet completely clear on how the masking word and have yet to find a > cleIar explanation. This value is double the amount of cores I actually > have. This is a bit confusing so any explanation would be appreciated. > > 3. Lastly how do I set affinity, although understanding q2 would answer q3? > I am happy to reread any documentation. The man 5 proc was not detailed > enough and I found the above mentioned Red Hat guide also lacking in > clarity. > > Disclaimer: Still suffering from the effects of a server bout of man flu so > any lack of clarity might be entirely down to me....
I haven't actually done what you are talking about, however I'm curious if there might be a simpler way. The host machine for that virtual is which hypervisor? How many CPUs (real vs HT etc)? -greg _______________________________________________ rhelv5-list mailing list rhelv5-list@redhat.com https://www.redhat.com/mailman/listinfo/rhelv5-list
