On Fri, Jan 8, 2021 at 7:03 PM Stanislav Fomichev <sdf@xxxxxxxxxx> wrote: > > Add custom implementation of getsockopt hook for TCP_ZEROCOPY_RECEIVE. > We skip generic hooks for TCP_ZEROCOPY_RECEIVE and have a custom > call in do_tcp_getsockopt using the on-stack data. This removes > 3% overhead for locking/unlocking the socket. > > Without this patch: > 3.38% 0.07% tcp_mmap [kernel.kallsyms] [k] __cgroup_bpf_run_filter_getsockopt > | > --3.30%--__cgroup_bpf_run_filter_getsockopt > | > --0.81%--__kmalloc > > With the patch applied: > 0.52% 0.12% tcp_mmap [kernel.kallsyms] [k] __cgroup_bpf_run_filter_getsockopt_kern > OK but we are adding yet another indirect call. Can you add a patch on top of it adding INDIRECT_CALL_INET() avoidance ? Thanks.
