Sorry for the slow response. I'm asking around internally as I'm not that familiar with iavf. I'll let you know when I hear back.
Todd Fujinaka Software Application Engineer Data Center Group Intel Corporation todd.fujin...@intel.com -----Original Message----- From: Chris Friesen <chris.frie...@windriver.com> Sent: Tuesday, January 12, 2021 3:53 PM To: e1000-devel@lists.sourceforge.net Subject: [E1000-devel] IRQ affinity not working for iavf devices? Hi, I have a CentOS 7 linux system with 48 logical CPUs and a number of Intel NICs running the i40e driver. It was booted with irqaffinity=0-1,24-25 in the kernel boot args, resulting in /proc/irq/default_smp_affinity showing "0000,03000003". CPUs 2-11 are set as "isolated" in the kernel boot args. The iavf driver is 3.7.61.20 and the i40e driver is 2.10.19.82 The problem I'm seeing is that /proc/interrupts shows iavf interrupts on other CPUs. For example, here are some on CPU 4 where I would not expect to see any interrupts given that "cat /proc/irq/<NUM>/smp_affinity_list" reports "0-1,24-25". cat /proc/interrupts | grep -e CPU -e 941: -e 942: -e 943: -e 944: -e 945: -e 961: -e 962: -e 963: -e 964: -e 965: CPU0 CPU1 CPU2 CPU3 CPU4 CPU5 941: 0 0 0 0 28490 0 IR-PCI-MSI-edge iavf-0000:b5:03.6:mbx 942: 0 0 0 0 333832 0 IR-PCI-MSI-edge iavf-net1-TxRx-0 943: 0 0 0 0 300842 0 IR-PCI-MSI-edge iavf-net1-TxRx-1 944: 0 0 0 0 333845 0 IR-PCI-MSI-edge iavf-net1-TxRx-2 945: 0 0 0 0 333822 0 IR-PCI-MSI-edge iavf-net1-TxRx-3 961: 0 0 0 0 28492 0 IR-PCI-MSI-edge iavf-0000:b5:02.7:mbx 962: 0 0 0 0 435608 0 IR-PCI-MSI-edge iavf-net1-TxRx-0 963: 0 0 0 0 394832 0 IR-PCI-MSI-edge iavf-net1-TxRx-1 964: 0 0 0 0 398414 0 IR-PCI-MSI-edge iavf-net1-TxRx-2 965: 0 0 0 0 192847 0 IR-PCI-MSI-edge iavf-net1-TxRx-3 Is this expected? It seems like the iavf and/or the i40e aren't respecting the configured SMP affinity for the interrupt in question. Thanks, Chris _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel Ethernet, visit https://forums.intel.com/s/topic/0TO0P00000018NbWAI/intel-ethernet _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel Ethernet, visit https://forums.intel.com/s/topic/0TO0P00000018NbWAI/intel-ethernet
