From: Eric Dumazet
Date: Fri, 18 Oct 2019 15:20:05 -0700
> Intel test robot reported a ~7% regression on TCP_CRR tests
> that they bisected to the cited commit.
>
> Indeed, every time a new TCP socket is created or deleted,
> the atomic counter net->count is touched (via get_net(net)
> and put_n
Intel test robot reported a ~7% regression on TCP_CRR tests
that they bisected to the cited commit.
Indeed, every time a new TCP socket is created or deleted,
the atomic counter net->count is touched (via get_net(net)
and put_net(net) calls)
So cpus might have to reload a contended cache line in
