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(parent: a249556) | patch
nfp: bpf: add short busy wait for FW replies
authorJakub Kicinski <jakub.kicinski@netronome.com>
Thu, 18 Jan 2018 03:13:32 +0000 (19:13 -0800)
committerDaniel Borkmann <daniel@iogearbox.net>
Thu, 18 Jan 2018 21:54:26 +0000 (22:54 +0100)
commit2b12b9c81a4e78022c1e82af4a07cafa8180d9ea
treeefd0d8d3cb68686132ce8adea69fddd8916e7477tree | snapshot
parenta2495562b65651fec11e85cbf61c610884b1bca3commit | diff
nfp: bpf: add short busy wait for FW replies

Scheduling out and in for every FW message can slow us down
unnecessarily.  Our experiments show that even under heavy load
the FW responds to 99.9% messages within 200 us.  Add a short
busy wait before entering the wait queue.

Signed-off-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
drivers/net/ethernet/netronome/nfp/bpf/cmsg.c diff | blob | history
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