> 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 ____________ || |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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