linux-kernel - Re: [ANNOUNCE] rt-tests-2.0

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Date:   Sat, 26 Jun 2021 08:55:34 +0200
From:   Mike Galbraith <efault@....de>
To:     John Kacur <jkacur@...hat.com>,
        RT <linux-rt-users@...r.kernel.org>,
        lkml <linux-kernel@...r.kernel.org>
Cc:     Clark Williams <williams@...hat.com>,
        Daniel Wagner <dwagner@...e.de>,
        Johnathan Schwender <schwenderjonathan@...il.com>,
        Peter Xu <peterx@...hat.com>
Subject: Re: [ANNOUNCE] rt-tests-2.0

On Fri, 2021-06-25 at 12:08 -0400, John Kacur wrote:
> I'm pleased to announce rt-tests-2.0

Greetings,

cyclictest seems to have grown an mlock related regression.

homer:..git/rt-tests # ./cyclictest -Smp99
# /dev/cpu_dma_latency set to 0us
policy: fifo: loadavg: 1.01 1.04 0.51 1/838 4411

T: 0 ( 4404) P:99 I:1000 C:   1536 Min:      1 Act:    1 Avg:    3 Max:    3846
T: 1 ( 4405) P:99 I:1500 C:   1021 Min:      1 Act:    1 Avg:    6 Max:    5912
T: 2 ( 4406) P:99 I:2000 C:    765 Min:      1 Act:    1 Avg:    8 Max:    5368
T: 3 ( 4407) P:99 I:2500 C:    611 Min:      1 Act:    1 Avg:    9 Max:    4862
T: 4 ( 4408) P:99 I:3000 C:    508 Min:      1 Act:    1 Avg:    9 Max:    4394
T: 5 ( 4409) P:99 I:3500 C:    436 Min:      1 Act:    1 Avg:    5 Max:    1699
T: 6 ( 4410) P:99 I:4000 C:    381 Min:      1 Act:    1 Avg:    1 Max:       4
T: 7 ( 4411) P:99 I:4500 C:    338 Min:      1 Act:    1 Avg:    1 Max:       4

Leave off -m switch...

homer:..git/rt-tests # ./cyclictest -Sp99
# /dev/cpu_dma_latency set to 0us
policy: fifo: loadavg: 1.19 1.02 0.55 1/833 4447

T: 0 ( 4440) P:99 I:1000 C:   1533 Min:      1 Act:    1 Avg:    1 Max:       4
T: 1 ( 4441) P:99 I:1500 C:   1022 Min:      1 Act:    1 Avg:    1 Max:       4
T: 2 ( 4442) P:99 I:2000 C:    766 Min:      1 Act:    1 Avg:    1 Max:       4
T: 3 ( 4443) P:99 I:2500 C:    613 Min:      1 Act:    1 Avg:    1 Max:       4
T: 4 ( 4444) P:99 I:3000 C:    511 Min:      1 Act:    1 Avg:    1 Max:       4
T: 5 ( 4445) P:99 I:3500 C:    438 Min:      1 Act:    1 Avg:    1 Max:       3
T: 6 ( 4446) P:99 I:4000 C:    383 Min:      1 Act:    1 Avg:    1 Max:       4
T: 7 ( 4447) P:99 I:4500 C:    340 Min:      1 Act:    1 Avg:    1 Max:       4

...and v2.0 regression goes away.

	-Mike