tree 03c16ab393989d80e4ca9034f415fe499dc83ce8
parent 905e4a4163c4e807daf1f1f6b8f958e762a834a8
author Alexander Duyck <alexander.h.duyck@intel.com> 1294324198 +0000
committer David S. Miller <davem@davemloft.net> 1294645451 -0800

ixgbe: further flow director performance optimizations

This change adds a compressed input type for atr signature hash
computation.  It also drops the use of the set functions when setting up
the ATR input since we can then directly setup the hash input as two dwords
that can be stored and passed as registers.

With these changes the cost of computing the has is low enough that we can
perform a hash computation on each TCP SYN flagged packet allowing us to
drop the number of flow director misses considerably in tests such as
netperf TCP_CRR.

Signed-off-by: Alexander Duyck <alexander.h.duyck@intel.com>
Tested-by: Stephen Ko <stephen.s.ko@intel.com>
Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>