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| author | Pavel Begunkov <asml.silence@gmail.com> | 2024-04-10 04:28:09 +0300 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2024-04-11 05:27:32 +0300 |
| commit | 7cb31c46b9cc37a5e564667fe46daf9a35dbafdd (patch) | |
| tree | b96f2ea221cdb949f977bf3077e941a7327adbd3 /tools/perf/scripts/python/export-to-postgresql.py | |
| parent | 9b9fd45869e744bea7d32a94793736e3d9fd7d26 (diff) | |
| download | linux-7cb31c46b9cc37a5e564667fe46daf9a35dbafdd.tar.xz | |
net: cache for same cpu skb_attempt_defer_free
Optimise skb_attempt_defer_free() when run by the same CPU the skb was
allocated on. Instead of __kfree_skb() -> kmem_cache_free() we can
disable softirqs and put the buffer into cpu local caches.
CPU bound TCP ping pong style benchmarking (i.e. netbench) showed a 1%
throughput increase (392.2 -> 396.4 Krps). Cross checking with profiles,
the total CPU share of skb_attempt_defer_free() dropped by 0.6%. Note,
I'd expect the win doubled with rx only benchmarks, as the optimisation
is for the receive path, but the test spends >55% of CPU doing writes.
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Reviewed-by: Eric Dumazet <edumazet@google.com>
Link: https://lore.kernel.org/r/a887463fb219d973ec5ad275e31194812571f1f5.1712711977.git.asml.silence@gmail.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions