[dpdk-dev] [dpdk-stable] [PATCH v4] mbuf: fix reset on mbuf free

Morten Brørup mb at smartsharesystems.com
Thu Jan 21 10:29:03 CET 2021


> From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Ferruh Yigit
> Sent: Thursday, January 21, 2021 10:19 AM
> 
> On 1/15/2021 6:39 PM, Ali Alnubani wrote:
> > Hi,
> > Adding Ferruh and Zhaoyan,
> >
> >> Ali,
> >>
> >> You reported some performance regression, did you confirm it?
> >> If I get no reply by monday, I'll proceed with this patch.
> >
> > Sure I'll confirm by Monday.
> >
> > Doesn't the regression also reproduce on the Lab's Intel servers?
> > Even though the check iol-intel-Performance isn't failing, I can see
> that the throughput differences from expected for this patch are less
> than those of another patch that was tested only 20 minutes earlier.
> Both patches were applied to the same tree:
> >
> > https://mails.dpdk.org/archives/test-report/2021-January/173927.html
> >> | 64         | 512     | 1.571                               |
> >
> > https://mails.dpdk.org/archives/test-report/2021-January/173919.html
> >> | 64         | 512     | 2.698                               |
> >
> > Assuming that pw86457 doesn't have an effect on this test, it looks
> to me that this patch caused a regression in Intel hardware as well.
> >
> > Can someone update the baseline's expected values for the Intel NICs
> and rerun the test on this patch?
> >
> 
> Zhaoyan said that the baseline is calculated dynamically,
> what I understand is baseline set based on previous days performance
> result, so
> it shouldn't require updating.

That sounds smart!

Perhaps another reference baseline could be added, for informational purposes only:
Deviation from the performance of the last official release.

> 
> But cc'ed the lab for more details.



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