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Subject: Re: [hwloc-users] Thread binding problem
From: Samuel Thibault (samuel.thibault_at_[hidden])
Date: 2012-09-19 10:36:20


Hello,

2012/9/6 Brice Goglin <Brice.Goglin_at_[hidden]>
>
> Anyway, having 65000 mempolicies in use is a lot. And that would somehow
> correspond to the number of set_area_membind that succeeed before one
> fails. So the kernel might indeed fail to merge those.
>
> That said, these objects are small (24bytes here if I am reading things
> correctly), so we're talking about 1,6MB only here. So there's still
> something else eating all the memory. /proc/meminfo (MemFree) and numactl
> -H should again help.

Gabriele Fatigati, le Fri 07 Sep 2012 09:45:55 +0200, a écrit :
> Are you able to reproduce the error using my attached code? 

Indeed, and numactl -H shows that memory *is* available. So I guess that
we are actually hitting some limitation in the kernel structures.

Samuel