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| author | Jason A. Donenfeld <Jason@zx2c4.com> | 2021-08-13 03:00:08 +0200 |
|---|---|---|
| committer | Bruno Martins <bgcngm@gmail.com> | 2023-11-06 09:28:24 +0000 |
| commit | 0e2c4e57aaa546a2eb234193c41bb87cb01aef35 (patch) | |
| tree | 8da5f78cb3fc6088a732e8b173ad9d6c13d14d04 /tools/perf/scripts/python/netdev-times.py | |
| parent | 745e9111c5bb16381cc6fc7ee67400d0390dd93e (diff) | |
receive: drop handshakes if queue lock is contended
If we're being delivered packets from multiple CPUs so quickly that the
ring lock is contended for CPU tries, then it's safe to assume that the
queue is near capacity anyway, so just drop the packet rather than
spinning. This helps deal with multicore DoS that can interfere with
data path performance. It _still_ does not completely fix the issue, but
it again chips away at it.
Reported-by: Streun Fabio <fstreun@student.ethz.ch>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Change-Id: I6e0a372a0b26907cc4ac425ecc17bdca8e07a2aa
Diffstat (limited to 'tools/perf/scripts/python/netdev-times.py')
0 files changed, 0 insertions, 0 deletions