> On Jun 19, 2019, at 2:00 PM, John Hearns via users <users@lists.open-mpi.org>
> wrote:
>
> Noam, it may be a stupid question. Could you try running slabtop ss the
> program executes
The top SIZE usage is this line
OBJS ACTIVE USE OBJ SIZE SLABS OBJ/SLAB CACHE SIZE NAME
5937540 5937540 100% 0.09K 141370 42 565480K kmalloc-96
which seems to be growing continuously. However, it’s much smaller than the
drop in free memory. It gets to around 1 GB after tens of seconds (500 MB
here), but the overall free memory is dropping by about 1 GB / second, so tens
of GB over the same time.
>
> Also 'watch cat /proc/meminfo'is also a good diagnostic
Other than MemFree dropping, I don’t see much. Here’s a diff, 10 seconds apart:
2,3c2,3
< MemFree: 54229400 kB
< MemAvailable: 54271804 kB
---
> MemFree: 45010772 kB
> MemAvailable: 45054200 kB
19c19
< AnonPages: 22063260 kB
---
> AnonPages: 22526300 kB
22,24c22,24
< Slab: 851380 kB
< SReclaimable: 87100 kB
< SUnreclaim: 764280 kB
---
> Slab: 1068208 kB
> SReclaimable: 89148 kB
> SUnreclaim: 979060 kB
31c31
< Committed_AS: 34976896 kB
---
> Committed_AS: 34977680 kB
MemFree has dropped by 9 GB, but as far as I can tell nothing else has
increased by anything near as much, so I don’t know where the memory is going.
Noam
____________
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|U.S. NAVAL|
|_RESEARCH_|
LABORATORY
Noam Bernstein, Ph.D.
Center for Materials Physics and Technology
U.S. Naval Research Laboratory
T +1 202 404 8628 F +1 202 404 7546
https://www.nrl.navy.mil <https://www.nrl.navy.mil/>
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