Unfortunately, I was unable to spot any striking difference in perfs
when using --bind-to-core.
Sorry. Any other suggestion ?
Regards, Gilbert.
Le 7 janv. 11 à 16:32, Jeff Squyres a écrit :
Well, bummer -- there goes my theory. According to the hwloc info
you posted earlier, this shows that OMPI is binding to the 1st
hyperthread on each core; *not* to both hyperthreads on a single
core. :-\
It would still be slightly interesting to see if there's any
difference when you run with --bind-to-core instead of
paffinity_alone.
On Jan 7, 2011, at 9:56 AM, Gilbert Grosdidier wrote:
Yes, here it is :
mpirun -np 8 --mca mpi_paffinity_alone 1 /opt/software/SGI/hwloc/
1.1rc6r3028/bin/hwloc-bind --get
0x00000001
0x00000002
0x00000004
0x00000008
0x00000010
0x00000020
0x00000040
0x00000080
Gilbert.
Le 7 janv. 11 à 15:50, Jeff Squyres a écrit :
Can you run with np=8?
On Jan 7, 2011, at 9:49 AM, Gilbert Grosdidier wrote:
Hi Jeff,
Thanks for taking care of this.
Here is what I got on a worker node:
mpirun --mca mpi_paffinity_alone 1 /opt/software/SGI/hwloc/
1.1rc6r3028/bin/hwloc-bind --get
0x00000001
Is this what is expected, please ? Or should I try yet another
command ?
Thanks, Regards, Gilbert.
Le 7 janv. 11 à 15:35, Jeff Squyres a écrit :
On Jan 6, 2011, at 11:23 PM, Gilbert Grosdidier wrote:
lstopo
Machine (35GB)
NUMANode L#0 (P#0 18GB) + Socket L#0 + L3 L#0 (8192KB)
L2 L#0 (256KB) + L1 L#0 (32KB) + Core L#0
PU L#0 (P#0)
PU L#1 (P#8)
L2 L#1 (256KB) + L1 L#1 (32KB) + Core L#1
PU L#2 (P#1)
PU L#3 (P#9)
L2 L#2 (256KB) + L1 L#2 (32KB) + Core L#2
PU L#4 (P#2)
PU L#5 (P#10)
L2 L#3 (256KB) + L1 L#3 (32KB) + Core L#3
PU L#6 (P#3)
PU L#7 (P#11)
[snip]
--
Jeff Squyres
jsquy...@cisco.com
For corporate legal information go to:
http://www.cisco.com/web/about/doing_business/legal/cri/
--
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Gilbert Grosdidier gilbert.grosdid...@in2p3.fr
LAL / IN2P3 / CNRS Phone : +33 1 6446 8909
Faculté des Sciences, Bat. 200 Fax : +33 1 6446 8546
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