[gem5-dev] Re: reduce the number of checkpoints in the ARM checkpoint test?

[Giacomo Travaglini via gem5-dev]

> -----Original Message-----
> From: Gabe Black <gabe.bl...@gmail.com>
> Sent: 12 October 2021 10:28
> To: Giacomo Travaglini <giacomo.travagl...@arm.com>
> Cc: gem5 Developer List <gem5-dev@gem5.org>
> Subject: Re: [gem5-dev] reduce the number of checkpoints in the ARM
> checkpoint test?
>
> Hi Giacomo. it's definitely minutes, probably between 5 and 10 per
> checkpoint.

I see

>
> Another thing I noticed is that often, the test infrastructure will schedule 
> the
> typically two final and longer running tests (I think both ARM boot tests) at
> the same time, but sometimes I'll wait and wait for the checkpoint one to run,
> and then it will start the other ARM test serially after it, even though I 
> passed
> in -t 6 (run 6 tests in parallel). It's just a guess, but is the framework 
> setting up
> 6 static schedules of tests and then feeding them to 6 threads to run? Or is 
> it
> dynamically scheduling them based on when different threads finish their
> current task? If it's the first, I think the second would be a great
> improvement as well, since that will save the occasional unnecessary
> serialization of long running tests.

As far as I can see we are using the multiprocessing.Pool object [1] which 
means a worker process
Will be used as soon as it becomes available. There shouldn't be dependencies 
between linux boot tests, except
For the regex matching tests which complete in almost zero time

>
> Gabe
>

Kind Regards

Giacomo

[1]: https://github.com/gem5/gem5/blob/stable/ext/testlib/runner.py#L177
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