From: Li RongQing <lirongq...@baidu.com> Date: Fri, 13 Jul 2018 14:41:36 +0800
> gro_hash size is 192 bytes, and uses 3 cache lines, if there is few > flows, gro_hash may be not fully used, so it is unnecessary to iterate > all gro_hash in napi_gro_flush(), to occupy unnecessary cacheline. > > convert gro_count to a bitmask, and rename it as gro_bitmask, each bit > represents a element of gro_hash, only flush a gro_hash element if the > related bit is set, to speed up napi_gro_flush(). > > and update gro_bitmask only if it will be changed, to reduce cache > update > > Suggested-by: Eric Dumazet <eduma...@google.com> > Signed-off-by: Li RongQing <lirongq...@baidu.com> > Cc: Stefano Brivio <sbri...@redhat.com> > --- > netperf shows no difference, maybe because my testing machine has large > cache Applied.
