diff options
| author | Corinna Vinschen <[email protected]> | 2019-11-19 10:09:39 +0100 |
|---|---|---|
| committer | David S. Miller <[email protected]> | 2019-11-19 16:41:11 -0800 |
| commit | a0783cd0c810504427777e8aae20d5f4f8b652a0 (patch) | |
| tree | 523987f32fb716e6b48c807ffe28766395183d54 /lib/mpi/mpi-mul.c | |
| parent | c9d55b62c90028fec0fc3a7eb01d03f8c241d27f (diff) | |
r8169: disable TSO on a single version of RTL8168c to fix performance
During performance testing, I found that one of my r8169 NICs suffered
a major performance loss, a 8168c model.
Running netperf's TCP_STREAM test didn't return the expected
throughput of > 900 Mb/s, but rather only about 22 Mb/s. Strange
enough, running the TCP_MAERTS and UDP_STREAM tests all returned with
throughput > 900 Mb/s, as did TCP_STREAM with the other r8169 NICs I can
test (either one of 8169s, 8168e, 8168f).
Bisecting turned up commit 93681cd7d94f83903cb3f0f95433d10c28a7e9a5,
"r8169: enable HW csum and TSO" as the culprit.
I added my 8168c version, RTL_GIGA_MAC_VER_22, to the code
special-casing the 8168evl as per the patch below. This fixed the
performance problem for me.
Fixes: 93681cd7d94f ("r8169: enable HW csum and TSO")
Signed-off-by: Corinna Vinschen <[email protected]>
Reviewed-by: Heiner Kallweit <[email protected]>
Signed-off-by: David S. Miller <[email protected]>
Diffstat (limited to 'lib/mpi/mpi-mul.c')
0 files changed, 0 insertions, 0 deletions