AnsweredAssumed Answered

QMAN portal IRQ affinity mask

Question asked by Simbu on Jun 12, 2014
Latest reply on Jun 26, 2014 by Vakul Garg

Hi All,


I'm working on the p4080 processor in which I attempted to change the IRQ mask for Q-Man Portal as below.


root> ls -lrt /proc/irq/106/smp_affinity

-rw------- 1 root root 0 Jun 12 17:22 /proc/irq/106/smp_affinity


root> cat /proc/irq/106/smp_affinity



Getting Input Output error as below:


root> echo 0x01 > /proc/irq/106/smp_affinity

-bash: echo: write error: Input/output error


Any idea how IRQ can be masked to different core?


I understand that these portals are dedicated to a single core, but for one specific reason (performance of other server processes running on this core) want to change this setting.


Thanks in Advance.