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linux/drivers/net/ethernet/freescale
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LEROY Christophe d43a396af0 net: fs_enet: Add NAPI TX 
When using a MPC8xx as a router, 'perf' shows a significant time spent in
fs_enet_interrupt() and fs_enet_start_xmit().
'perf annotate' shows that the time spent in fs_enet_start_xmit is indeed spent
between spin_unlock_irqrestore() and the following instruction, hence in
interrupt handling. This is due to the TX complete interrupt that fires after
each transmitted packet.
This patch modifies the handling of TX complete to use NAPI.
With this patch, my NAT router offers a throughput improved by 21%

Original performance:

[root@localhost tmp]# scp toto pgs:/tmp
toto                                          100%  256MB   2.8MB/s   01:31

Performance with the patch:

[root@localhost tmp]# scp toto pgs:/tmp
toto                                          100%  256MB   3.4MB/s   01:16

Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: David S. Miller <davem@davemloft.net>
2014-10-08 16:01:41 -04:00
..
fs_enet net: fs_enet: Add NAPI TX 2014-10-08 16:01:41 -04:00
fec_main.c fec: Fix fec_enet_alloc_buffers() error path 2014-10-06 00:53:56 -04:00
fec_mpc52xx_phy.c net: fec_mpc52xx_phy: remove unnecessary dev_set_drvdata() 2013-08-21 12:27:04 -07:00
fec_mpc52xx.c fec_mpc52xx: delete unneeded test before of_node_put 2014-08-08 10:28:08 -07:00
fec_mpc52xx.h
fec_ptp.c net: fec: ptp: avoid register access when ipg clock is disabled 2014-08-22 10:45:56 -07:00
fec.h net: fec: implement rx_copybreak to improve rx performance 2014-10-01 21:28:21 -04:00
fsl_pq_mdio.c drivers/net: delete non-required instances of include <linux/init.h> 2014-01-16 11:53:26 -08:00
gianfar_ethtool.c gianfar: Check if phydev present on ethtool -A 2014-04-24 13:36:16 -04:00
gianfar_ptp.c ptp: drivers: set the number of programmable pins. 2014-03-21 14:21:14 -04:00
gianfar.c net: gianfar: fix reference counting for phy_node 2014-08-07 16:02:58 -07:00
gianfar.h gianfar: Use Single-Queue polling for "fsl,etsec2" 2014-03-10 13:17:22 -04:00
Kconfig net/fsl: xgmac_mdio is dependent on OF_MDIO 2014-06-11 15:50:59 -07:00
Makefile gianfar: Remove sysfs stubs for FIFOCFG and stashing 2014-02-18 15:03:02 -05:00
ucc_geth_ethtool.c net: get rid of SET_ETHTOOL_OPS 2014-05-13 17:43:20 -04:00
ucc_geth.c net: ucc_geth: fix build failure 2014-08-10 21:40:15 -07:00
ucc_geth.h
xgmac_mdio.c net/fsl: Add format length modifier to avoid negative values 2014-07-30 19:58:09 -07:00