On Wed, 2015-01-14 at 20:03 -0500, Sowmini Varadhan wrote: > Relaxed ordering is disabled by default at driver initialization > and re-enabled when DCA is used. The reason it is disabled was > due to an issue on some chipsets (see comments in > ixgbe_update_tx_dca()). > But when DCA is not used, RO needs to be re-enabled, else we have > a serialization bottleneck on platforms like SPARC. > > This patch eliminates the bottleneck for ixgbe when DCA is not > configured. > > Signed-off-by: Sowmini Varadhan <sowmini.varad...@oracle.com> > Cc: Emil Tantilov <emil.s.tanti...@intel.com> > > --- > v2: incoroporate comments from Emil Tantilov > > drivers/net/ethernet/intel/ixgbe/ixgbe_82598.c | 23 > +++++++++++++++++++++++ > drivers/net/ethernet/intel/ixgbe/ixgbe_common.c | 20 > ++++++++++++++++++++ > drivers/net/ethernet/intel/ixgbe/ixgbe_common.h | 1 + > drivers/net/ethernet/intel/ixgbe/ixgbe_main.c | 11 +++++++++++ > drivers/net/ethernet/intel/ixgbe/ixgbe_type.h | 1 + > drivers/net/ethernet/intel/ixgbe/ixgbe_x540.c | 1 + > 6 files changed, 57 insertions(+), 0 deletions(-)
Thanks Sowmini, I have added your patch to my queue. I know that Emil and others are looking into whether we can do this for all ixgbe silicon, so we may have a follow-on patch to the work you have done already to enable this for all devices.
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