On Thu, 30 Mar 2017 10:31:08 +0100, Bruce Richardson [off-list ref] wrote:

On Wed, Mar 29, 2017 at 09:09:23PM +0100, Bruce Richardson wrote:

quoted

On Wed, Mar 29, 2017 at 05:56:29PM +0200, Olivier Matz wrote:  

quoted

Hi,

Does anyone have any other comment on this series?
Can it be applied?


Thanks,
Olivier
  

I assume all driver maintainers have done performance analysis to check
for regressions. Perhaps they can confirm this is the case.

	/Bruce  

quoted

In the absence, of anyone else reporting performance numbers with this
patchset, I ran a single-thread testpmd test using 2 x 40G ports (i40e)
driver. With RX & TX descriptor ring sizes of 512 or above, I'm seeing a
fairly noticable performance drop. I still need to dig in more, e.g. do
an RFC2544 zero-loss test, and also bisect the patchset to see what
parts may be causing the problem.

Has anyone else tried any other drivers or systems to see what the perf
impact of this set may be?

I did, of course. I didn't see any noticeable performance drop on
ixgbe (4 NICs, one port per NIC, 1 core). I can replay the test with
current version.


Olivier