How to confirm if Accelerated Flow Steering (ARFS) is disabled for Solarflare sfc NIC?
Issue
- How to confirm if Accelerated Flow Steering (ARFS) is disabled for Solarflare
sfcNIC? - High CPU seen following kernel update, and which persisted after third-party Solarflare driver update also. It looks like NIC is trying to execute Accelerated RFS. We do not intend to use RFS, as is evident by our lack of configuration of the
/proc/sys/net/core/rps_sock_flow_entriesandrps_flow_cnt/rps_cpusfiles for the interrupt queues.
Environment
- Red Hat Enterprise Linux 7
- Solarflare network interface using
sfcdriver
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