From mboxrd@z Thu Jan 1 00:00:00 1970 From: frog1120@gmail.com (J.Hwan Kim) Date: Fri, 26 Aug 2011 11:13:02 +0900 Subject: How to distribute IRQs to all cores In-Reply-To: References: <4E562D3F.4010701@gmail.com> Message-ID: <4E57012E.9080508@gmail.com> To: kernelnewbies@lists.kernelnewbies.org List-Id: kernelnewbies.lists.kernelnewbies.org On 2011? 08? 26? 03:19, Akash wrote: > Try programming the CPU-irq affinity by writing to > > /proc/irq//smp_affinity > > For example masks for irqs could be : > irq 97 - 0x1 > 99 - 0x2 > 103 - 0x4 > 104 - 0x8 > > That way, you are hardcoding on which cpu the particular irqs should land. > > HTH > Akash > > On Thu, Aug 25, 2011 at 4:08 AM, J.Hwan Kim > wrote: > > Hi, everyone > > The interrupts of my ixgbevf driver occurs only Core 0 > although the user space "irqbalance" serivce is working. > > How can I distribute the interrupt of RX in ixgbevf to all cores? > Is there any kernel compile option for it ? > > > cat /proc/interrupts | grep "isv" > 97: 8 0 0 0 0 > 0 0 0 PCI-MSI-edge isv0-rx-0 > 99: 7 0 0 0 0 > 0 0 0 PCI-MSI-edge isv0:lsc > 103: 2059 0 0 0 0 > 0 0 0 PCI-MSI-edge isv2-rx-0 > 104: 14 0 0 0 0 > 0 0 0 PCI-MSI-edge isv2-tx-0 > 105: 1 0 0 0 0 > 0 0 0 PCI-MSI-edge isv2:mbx > > "isv" is netdevice name of my ixgbevf. > Thank you for reply. I want to distribute, for example, IRQ 103 to all cores as follows : 103 : 111 2344 1334 3233 2233 1111 2233 362262 isv2-rx-0 That cannot be achieved by setting /proc/irq/irq-num/smp_affinity. -------------- next part -------------- An HTML attachment was scrubbed... URL: http://lists.kernelnewbies.org/pipermail/kernelnewbies/attachments/20110826/325ee98d/attachment.html