Re: [LTP] [PATCH] set_mempolicy01: cancel the limit of maximum runtime

[Richard Palethorpe <rpalethorpe@suse.de>]

Hello,

Li Wang <liwang@redhat.com> writes:

> On Tue, Dec 20, 2022 at 10:15 PM Cyril Hrubis <chrubis@suse.cz> wrote:
>
>> Hi!
>> > It needs more time for running on multiple numa nodes system.
>> > Here propose to cancel the limit of max_runtime.
>> >
>> >   ========= test log on 16 nodes system =========
>> >   ...
>> >   set_mempolicy01.c:80: TPASS: child: Node 15 allocated 16
>> >   tst_numa.c:25: TINFO: Node 0 allocated 0 pages
>> >   tst_numa.c:25: TINFO: Node 1 allocated 0 pages
>> >   tst_numa.c:25: TINFO: Node 2 allocated 0 pages
>> >   tst_numa.c:25: TINFO: Node 3 allocated 0 pages
>> >   tst_numa.c:25: TINFO: Node 4 allocated 0 pages
>> >   tst_numa.c:25: TINFO: Node 5 allocated 0 pages
>> >   tst_numa.c:25: TINFO: Node 6 allocated 0 pages
>> >   tst_numa.c:25: TINFO: Node 7 allocated 0 pages
>> >   tst_numa.c:25: TINFO: Node 8 allocated 0 pages
>> >   tst_numa.c:25: TINFO: Node 9 allocated 0 pages
>> >   tst_numa.c:25: TINFO: Node 10 allocated 0 pages
>> >   tst_numa.c:25: TINFO: Node 11 allocated 0 pages
>> >   tst_numa.c:25: TINFO: Node 12 allocated 0 pages
>> >   tst_numa.c:25: TINFO: Node 13 allocated 0 pages
>> >   tst_numa.c:25: TINFO: Node 14 allocated 0 pages
>> >   tst_numa.c:25: TINFO: Node 15 allocated 16 pages
>> >   set_mempolicy01.c:80: TPASS: parent: Node 15 allocated 16
>> >
>> >   Summary:
>> >   passed   393210
>> >   failed   0
>> >   broken   0
>> >   skipped  0
>> >   warnings 0
>> >
>> >   real        6m15.147s
>> >   user        0m33.641s
>> >   sys 0m44.553s
>>
>> Can't we just set the default to 30 minutes or something large enough?
>>
>
> Yes, I thought about a fixed larger value before, but seems the test
> time go increased extremely faster when the test matrix doubled.
>
> I don't have a system with more than 32 nodes to check if 30mins
> enough, so I guess probably canceling the limitation like what we
> did for oom tests would make sense, that timeout value depends
> on real system configurations.

IMO, this is what the timeout multiplier is for. So if you have a
computer with 512 CPUs or a tiny embedded device, you can adjust the
timeouts upwards.

The default timeouts are for workstations, commodity servers and
VMs. Although I suppose as this is a NUMA test the average machine will
be bigger, but 32 nodes on a physical machine would be 128-512 CPUs?

>
>
> -- 
> Regards,
> Li Wang


-- 
Thank you,
Richard.

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