nfp: bpf: add short busy wait for FW replies

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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>

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Jakub Kicinski 2018-01-17 19:13:32 -08:00 • committed by Daniel Borkmann

parent 7fedbb7c5a

commit ca027a1c45

1 changed files with 8 additions and 1 deletions

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9

drivers/net/ethernet/netronome/nfp/bpf/cmsg.c

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