Hello Everyone- So we tracked it down to IOMMU causing CPU affinity getting broken[1]. Can we provide any further details or is this a known issue?
Thank You, Brandon [1] https://github.com/coreos/bugs/issues/1275#issuecomment-219866601 On Tue, May 17, 2016 at 12:44 PM, Brandon Philips <bran...@ifup.co> wrote: > Hello ixgbe team- > > With Linux v4.6 and the ixgbe driver (details below) a user is reporting > ksoftirqd consuming 100% of the CPU on all cores after a moderate ~20-50 > number of TCP connections. They are unable to reproduce this issue with > Cisco hardware. > > With Kernel v3.19 they cannot reproduce[1] the issue. Disabling IOMMU > (intel_iommu=off) does "fix" the issue[2]. > > Thank You, > > Brandon > > [1] https://github.com/coreos/bugs/issues/1275#issuecomment-219157803 > [2] https://github.com/coreos/bugs/issues/1275#issuecomment-219819986 > > Intel Corporation 82599ES 10-Gigabit SFI/SFP+ Network Connection (rev 01) > ethtool -i eno1 > driver: ixgbe > version: 4.0.1-k > firmware-version: 0x800004e0 > bus-info: 0000:06:00.0 > supports-statistics: yes > supports-test: yes > supports-eeprom-access: yes > supports-register-dump: yes > supports-priv-flags: no > > CPU > Intel(R) Xeon(R) CPU E5-2690 v3 @ 2.60GHz
