[Beowulf] memory usage

[Lawrence Stewart]

And of course 

numactl -H

will tell you which numa nodes are associated with which CPUs, at least down to the socket level.



> On 2018, Jun 22, at 2:48 PM, Michael Di Domenico <mdidomenico4 at gmail.com> wrote:
> 
> On Fri, Jun 22, 2018 at 2:44 PM, Skylar Thompson
> <skylar.thompson at gmail.com> wrote:
>> On Friday, June 22, 2018, Michael Di Domenico <mdidomenico4 at gmail.com>
>> wrote:
>>> 
>>> On Fri, Jun 22, 2018 at 2:28 PM, Skylar Thompson
>>> <skylar.thompson at gmail.com> wrote:
>>>> Assuming Linux, you can get that information out of /proc/<pid>/smaps
>>>> and
>>>> numa_maps.
>>> 
>>> the memory regions are in there for the used bits, but i don't have
>>> anything that translates those regions to which cpu the region sits on
>> 
>> I think the number before the = in the page count fields (Nn=pages) is the
>> NUMA node number. Not exactly the CPU, but the memory isn't allocated to a
>> specific CPU (modulo CPU cache).
> 
> ah, spiffy.  i glossed right over that in the manpage
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