[PATCH net-next 0/2] net: broadcom: Adaptive interrupt coalescing

[Florian Fainelli <f.fainelli@gmail.com>]

Hi all,

This patch series adds adaptive interrupt coalescing for the Gigabit Ethernet
drivers SYSTEMPORT and GENET.

This really helps lower the interrupt count and system load, as measured by
vmstat for a Gigabit TCP RX session:

SYSTEMPORT:

without:

 1  0      0 192188      0  25472    0    0     0     0 122100 38870  1 42 57  0  0
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-10.0 sec  1.03 GBytes   884 Mbits/sec

with:

 1  0      0 192288      0  25468    0    0     0     0 58806 44401  0 100  0  0  0
[  5]  0.0-10.0 sec  1.04 GBytes   888 Mbits/sec

GENET:

without:

 1  0      0 1170404      0  25420    0    0     0     0 130785 63402  2 85 12  0  0
[ ID] Interval       Transfer     Bandwidth
[  4]  0.0-10.0 sec  1.04 GBytes   888 Mbits/sec

with:

 1  0      0 1170560      0  25420    0    0     0     0 50610 48477  0 100  0  0  0
[  5]  0.0-10.0 sec  1.05 GBytes   899 Mbits/sec

Please look at the implementation and let me know if you see any problems, this
was largely inspired by bnxt_en.

Thank you!

Florian Fainelli (2):
  net: systemport: Implement adaptive interrupt coalescing
  net: bcmgenet: Add support for adaptive RX coalescing

 drivers/net/ethernet/broadcom/bcmsysport.c     | 141 ++++++++++++++++++++++---
 drivers/net/ethernet/broadcom/bcmsysport.h     |  14 +++
 drivers/net/ethernet/broadcom/genet/bcmgenet.c | 109 +++++++++++++++----
 drivers/net/ethernet/broadcom/genet/bcmgenet.h |  12 +++
 4 files changed, 243 insertions(+), 33 deletions(-)

-- 
2.14.1