I am playing around with irqbalance to tune my 8 core system so I came across this page, http://kb.fusionio.com/KB/a65/irqbalance-avoid-overloading-cpu-0-with-interr...
Now, lets say I disable irqbalance which will stop my autobalance and I pin all of my interrupts to core 0 and pin eth0 and eth1 to core 1. My application is network and CPU hungry. I am planning to dedicate cpu 3 to 8 for the application using taskset. Is there any draw back to this?
On Fri, 2010-09-24 at 08:57 -0400, Mag Gam wrote:
I am playing around with irqbalance to tune my 8 core system so I came across this page, http://kb.fusionio.com/KB/a65/irqbalance-avoid-overloading-cpu-0-with-interr...
Now, lets say I disable irqbalance which will stop my autobalance and I pin all of my interrupts to core 0 and pin eth0 and eth1 to core 1. My application is network and CPU hungry. I am planning to dedicate cpu 3 to 8 for the application using taskset. Is there any draw back to this?
--- NO but be aware of what your doing as to not starve out Kernel Threads. Whats the kernel? It want hurt to give them priority either. Gbit and higher nics I would give them there own cpu. It may take quit a while to come up with the optimal configuration though. Example: cpu0 app priority 60 - 99 no ionice is app dependent cpu1 app cpu2 eth0 cpu3 eth1 cpu4 fusionio cpu5 fusionio cpu6 kthreads cpu7 kthreads, misc
John
Thanks for the reply.
I am just playing around to understand this.
On Fri, Sep 24, 2010 at 9:43 AM, JohnS jses27@gmail.com wrote:
On Fri, 2010-09-24 at 08:57 -0400, Mag Gam wrote:
I am playing around with irqbalance to tune my 8 core system so I came across this page, http://kb.fusionio.com/KB/a65/irqbalance-avoid-overloading-cpu-0-with-interr...
Now, lets say I disable irqbalance which will stop my autobalance and I pin all of my interrupts to core 0 and pin eth0 and eth1 to core 1. My application is network and CPU hungry. I am planning to dedicate cpu 3 to 8 for the application using taskset. Is there any draw back to this?
NO but be aware of what your doing as to not starve out Kernel Threads. Whats the kernel? It want hurt to give them priority either. Gbit and higher nics I would give them there own cpu. It may take quit a while to come up with the optimal configuration though. Example: cpu0 app priority 60 - 99 no ionice is app dependent cpu1 app cpu2 eth0 cpu3 eth1 cpu4 fusionio cpu5 fusionio cpu6 kthreads cpu7 kthreads, misc
John
CentOS mailing list CentOS@centos.org http://lists.centos.org/mailman/listinfo/centos
-
JohnS -
Mag Gam