Yes, it's not a clear sentence. This is a rephrase avoiding the "not":
"It is worth pointing out that binding helps other things besides memory
locality issues.
Regards,
Darryl.
On 01/20/10 07:54, David Miller - SAE wrote:
Hi Daniel,
I believe you didn't understand what Darryl wrote. It's probably just a
language issue. The sentence below says "not just help", not "not
help". What
he means is that in addition to helping with locality issues, it also
helps with
thread migrations.
So you are right (and that's what Darryl says as well).
One additional caveat and that is that MPO is advisory only. It will
allocate
memory in the local lgroup if it's available, but will allocate from
another
lgroup if it's not. So if that lgroup is oversubscribed, you will get
remote
memory.
Regards,
Dave Miller
Daniel, Wu wrote:
Some expert said it doesn't help.
http://blogs.sun.com/d/entry/numa_binding_and_openmp
it said "It is worth pointing out that binding does not just help
memory locality issues."
but if a process was bind to a cpu and never migrate to other cpu, MPO
only allocate memory to the home lgroup, so I think the memory used
will be always local, and should help. my understanding is wrong?
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Darryl Gove
Compiler Performance Engineering
Blog : http://blogs.sun.com/d/
Books: http://www.sun.com/books/catalog/solaris_app_programming.xml
http://my.safaribooksonline.com/0595352510
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