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| author | Eric Dumazet <[email protected]> | 2021-11-24 12:24:46 -0800 |
|---|---|---|
| committer | Jakub Kicinski <[email protected]> | 2021-11-25 21:03:31 -0800 |
| commit | 29c3002644bdd653f6ec6407d25135d0a4f7cefb (patch) | |
| tree | 7f17a01eb6164d66c713a0d18fde1ffa231707e4 /tools/perf/scripts/python/netdev-times.py | |
| parent | 0bd28476f6363c7ccc841fe6a0ab0dd1fdb822f6 (diff) | |
net: optimize skb_postpull_rcsum()
Remove one pair of add/adc instructions and their dependency
against carry flag.
We can leverage third argument to csum_partial():
X = csum_block_sub(X, csum_partial(start, len, 0), 0);
-->
X = csum_block_add(X, ~csum_partial(start, len, 0), 0);
-->
X = ~csum_partial(start, len, ~X);
Signed-off-by: Eric Dumazet <[email protected]>
Signed-off-by: Jakub Kicinski <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/netdev-times.py')
0 files changed, 0 insertions, 0 deletions