| commit | ed734a97c6a81b644bd648afd7a337deb0ccd7e5 | |
| author | Eric Dumazet <dada1@cosmosbay.com> | |
| Sat, 21 Mar 2009 20:42:55 +0000 (21 13:42 -0700) | ||
| committer | David S. Miller <davem@davemloft.net> | |
| Sat, 21 Mar 2009 20:42:55 +0000 (21 13:42 -0700) | ||
| tree | 2c030345bf9fb6ab6228d4757a96f9f7109fa60e | treesnapshot (tar.gz zip) |
| parent | 8d2f9e81169b8120cf2b4872930ae491b17c27b8 | commitdiff |
net: remove useless prefetch() call
There is no gain using prefetch() in dev_hard_start_xmit(), since
we already had to read ops->ndo_select_queue pointer in dev_pick_tx(),
and both pointers are probably located in the same cache line.
This prefetch call slows down fast path because of a stall in address
computation.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
There is no gain using prefetch() in dev_hard_start_xmit(), since
we already had to read ops->ndo_select_queue pointer in dev_pick_tx(),
and both pointers are probably located in the same cache line.
This prefetch call slows down fast path because of a stall in address
computation.
Signed-off-by: Eric Dumazet <dada1@cosmosbay.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
| net/core/dev.c | diffblobblamehistory |