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

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Message-Id: <20180323011933.29748-1-f.fainelli@gmail.com>
Date:   Thu, 22 Mar 2018 18:19:31 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     netdev@...r.kernel.org
Cc:     Florian Fainelli <f.fainelli@...il.com>, davem@...emloft.net,
        jaedon.shin@...il.com, pgynther@...gle.com, opendmb@...il.com,
        michal.chan@...adcom.com, gospo@...adcom.com, talgi@...lanox.com,
        saeedm@...lanox.com
Subject: [PATCH net-next 0/2] net: broadcom: Adaptive interrupt coalescing

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