Hi All
I am using the following Linux version for my application:
**************************************** [root@localhost ~]# uname -a Linux localhost.localdom 2.6.18-164.el5 #1 SMP Thu Sep 3 03:28:30 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux ****************************************
**************************************** [root@localhost ~]# cat /etc/*release CentOS release 5.4 (Final) ****************************************
When my application is running on the server i can see only one core being used heavily while the other cores are not being used much. My application has a major workload is collecting data from the eth0 interface and then doing a lot of processing with the data in the database. So i can say that the Disk I/O and Network I/O are the major contributors towards the workload.
from the /proc/interrupts file i can see the following:
**************************************************** [root@localhost ~]# cat /proc/interrupts CPU0 CPU1 CPU2 CPU3 0: 16084980 0 0 0 IO-APIC-edge timer 1: 141 0 0 0 IO-APIC-edge i8042 6: 5 0 0 0 IO-APIC-edge floppy 7: 0 0 0 0 IO-APIC-edge parport0 8: 0 0 0 0 IO-APIC-edge rtc 9: 0 0 0 0 IO-APIC-level acpi 12: 251 0 0 0 IO-APIC-edge i8042 51: 2410224 0 0 0 IO-APIC-level ioc0 59: 11358257 0 0 0 IO-APIC-level eth0 NMI: 0 0 0 0 LOC: 16086147 16090336 16090320 16089691 ERR: 0 MIS: 0 ****************************************************
From the above output i can see that all the interrupts are hitting the cpu0 and thats why it is used more than any other core in the system.
Can someone please help me in distributing the interrupts across all the cores so that all are used which will eventually result in a better performance of my system.
Appreciate your response in this regard.
Thanks Jatin