tree 9bf9a48122dd249346eac51b7556961d587e7dbb
parent 640faf418a23fb6b5b28480a5f91e0d02e265470
author Matthew McClintock <mmcclint@qca.qualcomm.com> 1435267341 -0500
committer Gerrit - the friendly Code Review server <code-review@localhost> 1442349833 -0700

fast-classifier: change from irq spinlocks to bh spinlocks

Turns out turning IRQs on and off is expensive.

before/without:

 cycles per pkt = 3094.8688459
 instructions per pkt = 1939.64627983
 dcache_misses per pkt = 116.502415214
 icache_misses per pkt = 1.02315169093

after/with:

 cycles per pkt = 2767.29080103
 instructions per pkt = 1777.71736789
 dcache_misses per pkt = 110.665225744
 icache_misses per pkt = 0.574557637955

Re-runing multiple times seems to confirm a small decrease cache
misses.

Change-Id: I12e11c11a8e190bb4f4030189b9f222ac0269ddd
Signed-off-by: Matthew McClintock <mmcclint@qca.qualcomm.com>