Yes. You can only set affinity of an interrupt line to one core. Todd Fujinaka Software Application Engineer Networking Division (ND) Intel Corporation todd.fujin...@intel.com (503) 712-4565
-----Original Message----- From: 蒙奇D小碗豆 [mailto:wenx05124...@163.com] Sent: Wednesday, October 15, 2014 3:45 AM To: e1000-devel@lists.sourceforge.net Subject: [E1000-devel] igb driver irq affnity Hi, 1. The netwrok card I350 running with igb driver. There are 8 tx-rx queues, each queue has a interrupt vector. I can only set a irq line to one core. If I set the affnity to multiple core, the hardware interrupt only comes out on one core. # uname -r 2.6.32-279.19.10.el6.x86_64 # cat /proc/interrupt | grep eth1 42: 29424 0 0 0 0 0 0 0 IR-PCI-MSI-edge eth1-TxRx-0 43: 107313 0 0 0 0 0 0 0 IR-PCI-MSI-edge eth1-TxRx-1 44: 56983 0 0 0 0 0 0 0 IR-PCI-MSI-edge eth1-TxRx-2 45: 218351 0 0 0 0 0 0 0 IR-PCI-MSI-edge eth1-TxRx-3 46: 24512 0 0 0 0 0 0 0 IR-PCI-MSI-edge eth1-TxRx-4 47: 221472 0 0 0 0 0 0 0 IR-PCI-MSI-edge eth1-TxRx-5 48: 13703 0 0 0 0 0 0 0 IR-PCI-MSI-edge eth1-TxRx-6 49: 86444 0 0 0 0 0 0 0 IR-PCI-MSI-edge eth1-TxRx-7 # cat /proc/irq/42/smp_affnity ff I also download the newest version of the igb driver, it's also like this. I compiled a new kernel 3.10.54. The interrupt vector can assigned to all the cores. It shows PCI-MSI-edge but not IR-PCI-MSI-edge # uname -r 3.10.54 # cat /proc/interrupt | grep eth1 52: 174 6 8 26 30 5 4 1 PCI-MSI-edge eth1-TxRx-0 53: 9 4 3 22 2 7 1 0 PCI-MSI-edge eth1-TxRx-1 54: 11 5 3 23 9 4 4 0 PCI-MSI-edge eth1-TxRx-2 55: 62 24 25 36 47 35 21 14 PCI-MSI-edge eth1-TxRx-3 56: 95 19 15 27 51 19 18 2 PCI-MSI-edge eth1-TxRx-4 57: 14 5 0 23 1 2 3 0 PCI-MSI-edge eth1-TxRx-5 58: 45 4 3 25 8 4 1 1 PCI-MSI-edge eth1-TxRx-6 59: 122 37 37 44 85 62 43 17 PCI-MSI-edge eth1-TxRx-7 # cat /proc/irq/42/smp_affnity ff I investigate the kernel code, It seems there are something matter with interrupt-mapping? How Can I fix this in the 2.6.32-279.19.10.el6.x86_64? BR Xu Wen ------------------------------------------------------------------------------ Comprehensive Server Monitoring with Site24x7. Monitor 10 servers for $9/Month. Get alerted through email, SMS, voice calls or mobile push notifications. Take corrective actions from your mobile device. http://p.sf.net/sfu/Zoho _______________________________________________ E1000-devel mailing list E1000-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/e1000-devel To learn more about Intel® Ethernet, visit http://communities.intel.com/community/wired
