> From: Intel-wired-lan [mailto:intel-wired-lan-boun...@lists.osuosl.org] On > Behalf Of Andrew Lunn > Sent: Friday, June 3, 2016 2:03 PM > To: Kirsher, Jeffrey T <jeffrey.t.kirs...@intel.com>; David Miller > <da...@davemloft.net> > Cc: netdev <netdev@vger.kernel.org>; intel-wired-...@lists.osuosl.org; > Andrew Lunn <and...@lunn.ch> > Subject: [Intel-wired-lan] [PATCHv2 net-next] net: igb: Only dma sync frame > length > > On some platforms, syncing a buffer for DMA is expensive. Rather than > sync the whole 2K receive buffer, only synchronise the length of the > frame, which will typically be the MTU, or a much smaller TCP ACK. > > For an IMX6Q, this gives around 6% increased TCP receive performance, > which is cache operations bound and reduces CPU load for TCP transmit. > > Signed-off-by: Andrew Lunn <and...@lunn.ch> > --- > v2: > Christmas tree the local variables > Pass size into igb_add_rx_frag() rather than repeating the endiness swap. > --- > drivers/net/ethernet/intel/igb/igb_main.c | 7 ++++--- > 1 file changed, 4 insertions(+), 3 deletions(-)
Tested-by: Aaron Brown <aaron.f.br...@intel.com>
