[LTP] [PATCH 1/3] ltp/numa: waiting for numastat refresh

[Li Wang]

On Thu, Dec 1, 2016 at 6:51 PM, Cyril Hrubis <chrubis@suse.cz> wrote:
> Hi!
> I've been looking into the problem and found much better solution. We
> can, instead of quering the whole system statistic, read statistic for a
> single process.

This method is great! But, I'm thinking about how can we apply to
test6, test7 and test8, because these functions do not involve
support_numa.c process in their test.

In test8:
   numactl --interleave=all memhog 1MB

It seems a little hard to hang up this memhog process.


Or, can we reseve previous method compatible with this? In other
words, two method exsit at the same time.

Li Wang


>
> What about we do:
>
> 1. Change support_numa.c to sleep in wait() instead of exitting when
>    allocating memory
> 2. Run the numactl ... command on background with &
> 3. Then we can get statistic for a single process with numastat -p $pid
>    Alternatively we can change the support_numa.c to allocate the memory
>    with mmap and parse /proc/$pid/numa_maps to match the pointer address
>    and figure out if the mapping(s) are distributed correctly
> 4. Then we can kill the $pid
>
> --
> Cyril Hrubis
> chrubis@suse.cz



-- 
Regards,
Li Wang
Email: liwang@redhat.com