numa01
Hi!
numa01.sh does something like:
* numastat > /tmp/before
* starts a binary with the specified memory policy using numactl (or a
like):
numactl --interleave=all get_some_memory_with_malloc_and_write_it
* sleep for few seconds
* numastat > /tmp/after
* compares /tmp/before and /tmp/after to check that the numa policy
was applied the right way
But the problem is that on a host with many NUMA nodes (8) the process of updating that numastats statistics takes some time. Even 10 seconds may be not enough. Therefore the test fails.
Does anybody know if there is a direct or indirect way to force the kernel to update the NUMA statistics?
Thank you.
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Hi!
Quoted 10 lines
numa01.shdoes something like:
* numastat >/tmp/before
* starts a binary with the specified memory policy using numactl (or a
like):numactl --interleave=all get_some_memory_with_malloc_and_write_it*
sleepfor few seconds
* numastat >/tmp/after
* compares/tmp/beforeand/tmp/afterto check that the numa policy
was applied the right way
Quoted 6 lines
But the problem is that on a host with many NUMA nodes (8) the process of updating that numastats statistics takes some time. Even 10 seconds may be not enough. Therefore the test fails.
Does anybody know if there is a direct or indirect way to force the kernel to update the NUMA statistics?
I don't think you can force the statistics to update. I guess that all we can do is to poll the statistics and wait until it changes the way we expect (with some timeout).
And the best soulution would be to ask kernel memory management developers, they should know better (feel free to CC LTP ML).
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Cyril Hrubis [email protected] ------------------------------------------------------------------------------ _______________________________________________ Ltp-list mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/ltp-list