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| author | Jason Wang <[email protected]> | 2025-07-01 01:03:52 +0000 |
|---|---|---|
| committer | Jakub Kicinski <[email protected]> | 2025-07-02 22:29:46 +0000 |
| commit | 97b2409f28e0d69e5ab62df0798be8bd744a770f (patch) | |
| tree | bdf07859e5a8f978c4e8b4a47226a8135c315234 /tools/testing/selftests/net/lib/py/utils.py | |
| parent | tun: remove unnecessary tun_xdp_hdr structure (diff) | |
| download | kernel-97b2409f28e0d69e5ab62df0798be8bd744a770f.tar.gz kernel-97b2409f28e0d69e5ab62df0798be8bd744a770f.zip | |
vhost-net: reduce one userspace copy when building XDP buff
We used to do twice copy_from_iter() to copy virtio-net and packet
separately. This introduce overheads for userspace access hardening as
well as SMAP (for x86 it's stac/clac). So this patch tries to use one
copy_from_iter() to copy them once and move the virtio-net header
afterwards to reduce overheads.
Testpmd + vhost_net shows 10% improvement from 5.45Mpps to 6.0Mpps.
Signed-off-by: Jason Wang <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Jakub Kicinski <[email protected]>
Diffstat (limited to 'tools/testing/selftests/net/lib/py/utils.py')
0 files changed, 0 insertions, 0 deletions