From: Kornilios Kourtis <kkourt@cslab.ece.ntua.gr>
To: Andi Kleen <andi@firstfloor.org>
Cc: linux-numa@vger.kernel.org
Subject: Re: find the node that a cpu belongs to
Date: Tue, 17 Mar 2009 13:32:42 +0200 [thread overview]
Message-ID: <20090317113242.GA30922@solar.cslab.ece.ntua.gr> (raw)
In-Reply-To: <20090317104522.GN11935@one.firstfloor.org>
On Tue, Mar 17, 2009 at 11:45:22AM +0100, Andi Kleen wrote:
> On Tue, Mar 17, 2009 at 03:09:10AM +0200, Kornilios Kourtis wrote:
> > Hi,
> >
> > I was wondering if you would be interested in adding a libnuma function
> > for determing the node that a cpu belongs to.
>
> Concrete use case please. Why would you want to do that in a program?
My specific case is quite simple: I have a program that creates a number
of threads that are bound to run in specific cpus. I want to pre-allocate
memory in the node of the cpu that the thread will run before the threads
are created using numa_alloc_onnode().
Obviously, there isn't a hard requirement to include such a function in
libnuma, since it could be implemented using existing functions, or make
the allocations after the threads are spawned using numa_alloc_local().
On the other hand I'm guessing that it could be useful to other cases as
well.
cheers,
--
Kornilios Kourtis
next prev parent reply other threads:[~2009-03-17 11:32 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-17 1:09 find the node that a cpu belongs to Kornilios Kourtis
2009-03-17 10:45 ` Andi Kleen
2009-03-17 11:32 ` Kornilios Kourtis [this message]
2009-03-17 11:59 ` Andi Kleen
2009-03-18 15:19 ` Kornilios Kourtis
2009-03-19 14:16 ` Cliff Wickman
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