On 03/21/2019 03:17 PM, Eric Dumazet wrote:
> Often times, recvmsg() system calls and BH handling for a particular
> TCP socket are done on different cpus.
...
> Note that if rps/rfs is used, we do not enable this feature, because
> there is high chance that the same cpu is handling both the r
Often times, recvmsg() system calls and BH handling for a particular
TCP socket are done on different cpus.
This means the incoming skb had to be allocated on a cpu,
but freed on another.
This incurs a high spinlock contention in slab layer for small rpc,
but also a high number of cache line ping
