Hello, We see the same problem here on various machines with Open MPI 2.0.0. To us it seems that enabling the openib btl triggers bad performance for the sm AND vader btls! --mca btl_base_verbose 10 reports in both cases the correct use of sm and vader between MPI ranks - only performance differs?!
One irritating thing I see in the log output is the following: openib BTL: rdmacm CPC unavailable for use on mlx4_0:1; skipped [rank=1] openib: using port mlx4_0:1 select: init of component openib returned success Did not look into the "Skipped" code part yet, but maybe there is a problem not skipping "as intended" confusing interfaces later on? Results see below. Best regards Christoph Niethammer -- Christoph Niethammer High Performance Computing Center Stuttgart (HLRS) Nobelstrasse 19 70569 Stuttgart Tel: ++49(0)711-685-87203 email: nietham...@hlrs.de http://www.hlrs.de/people/niethammer mpirun -np 2 --mca btl self,vader osu_bw # OSU MPI Bandwidth Test # Size Bandwidth (MB/s) 1 4.83 2 10.30 4 24.68 8 49.27 16 95.80 32 187.52 64 270.82 128 405.00 256 659.26 512 1165.14 1024 2372.83 2048 3592.85 4096 4283.51 8192 5523.55 16384 7388.92 32768 7024.37 65536 7353.79 131072 7465.96 262144 8597.56 524288 9292.86 1048576 9168.01 2097152 9009.62 4194304 9013.02 mpirun -np 2 --mca btl self,vader,openib osu_bw # OSU MPI Bandwidth Test # Size Bandwidth (MB/s) 1 5.32 2 11.14 4 20.88 8 49.26 16 99.11 32 197.42 64 301.08 128 413.64 256 651.15 512 1161.12 1024 2460.99 2048 3627.36 4096 2191.06 8192 3118.36 16384 3428.45 32768 3676.96 65536 3709.65 131072 3748.64 262144 3764.88 524288 3764.61 1048576 3772.45 2097152 3757.37 4194304 3746.45 mpirun -np 2 --mca btl self,sm osu_bw # OSU MPI Bandwidth Test # Size Bandwidth (MB/s) 1 2.98 2 5.97 4 11.99 8 23.47 16 50.64 32 99.91 64 197.87 128 343.32 256 667.48 512 1200.86 1024 2050.05 2048 3578.52 4096 3966.92 8192 5687.96 16384 7395.88 32768 7101.41 65536 7619.49 131072 7978.09 262144 8648.87 524288 9129.18 1048576 10525.31 2097152 10511.63 4194304 10489.66 mpirun -np 2 --mca btl self,sm,openib osu_bw # OSU MPI Bandwidth Test # Size Bandwidth (MB/s) 1 2.02 2 3.00 4 9.99 8 19.96 16 40.10 32 70.63 64 144.08 128 282.21 256 543.55 512 1032.61 1024 1871.09 2048 3294.07 4096 2336.48 8192 3142.22 16384 3419.93 32768 3647.30 65536 3725.40 131072 3749.43 262144 3765.31 524288 3771.06 1048576 3772.54 2097152 3760.93 4194304 3745.37 ----- Original Message ----- From: tmish...@jcity.maeda.co.jp To: "Open MPI Developers" <de...@open-mpi.org> Sent: Wednesday, July 27, 2016 6:04:48 AM Subject: Re: [OMPI devel] sm BTL performace of the openmpi-2.0.0 HiNathan, I applied those commits and ran again without any BTL specified. Then, although it says "mca: bml: Using vader btl for send to [[18993,1],1] on node manage", the osu_bw still shows it's very slow as shown below: [mishima@manage OMB-3.1.1-openmpi2.0.0]$ mpirun -np 2 -mca btl_base_verbose 10 -bind-to core -report-bindings osu_bw [manage.cluster:17482] MCW rank 0 bound to socket 0[core 0[hwt 0]]: [B/././././.][./././././.] [manage.cluster:17482] MCW rank 1 bound to socket 0[core 1[hwt 0]]: [./B/./././.][./././././.] [manage.cluster:17487] mca: base: components_register: registering framework btl components [manage.cluster:17487] mca: base: components_register: found loaded component self [manage.cluster:17487] mca: base: components_register: component self register function successful [manage.cluster:17487] mca: base: components_register: found loaded component vader [manage.cluster:17488] mca: base: components_register: registering framework btl components [manage.cluster:17488] mca: base: components_register: found loaded component self [manage.cluster:17487] mca: base: components_register: component vader register function successful [manage.cluster:17488] mca: base: components_register: component self register function successful [manage.cluster:17488] mca: base: components_register: found loaded component vader [manage.cluster:17487] mca: base: components_register: found loaded component tcp [manage.cluster:17488] mca: base: components_register: component vader register function successful [manage.cluster:17488] mca: base: components_register: found loaded component tcp [manage.cluster:17487] mca: base: components_register: component tcp register function successful [manage.cluster:17487] mca: base: components_register: found loaded component sm [manage.cluster:17488] mca: base: components_register: component tcp register function successful [manage.cluster:17488] mca: base: components_register: found loaded component sm [manage.cluster:17487] mca: base: components_register: component sm register function successful [manage.cluster:17488] mca: base: components_register: component sm register function successful [manage.cluster:17488] mca: base: components_register: found loaded component openib [manage.cluster:17487] mca: base: components_register: found loaded component openib [manage.cluster:17488] mca: base: components_register: component openib register function successful [manage.cluster:17488] mca: base: components_open: opening btl components [manage.cluster:17488] mca: base: components_open: found loaded component self [manage.cluster:17488] mca: base: components_open: component self open function successful [manage.cluster:17488] mca: base: components_open: found loaded component vader [manage.cluster:17488] mca: base: components_open: component vader open function successful [manage.cluster:17488] mca: base: components_open: found loaded component tcp [manage.cluster:17488] mca: base: components_open: component tcp open function successful [manage.cluster:17488] mca: base: components_open: found loaded component sm [manage.cluster:17488] mca: base: components_open: component sm open function successful [manage.cluster:17488] mca: base: components_open: found loaded component openib [manage.cluster:17488] mca: base: components_open: component openib open function successful [manage.cluster:17488] select: initializing btl component self [manage.cluster:17488] select: init of component self returned success [manage.cluster:17488] select: initializing btl component vader [manage.cluster:17487] mca: base: components_register: component openib register function successful [manage.cluster:17487] mca: base: components_open: opening btl components [manage.cluster:17487] mca: base: components_open: found loaded component self [manage.cluster:17487] mca: base: components_open: component self open function successful [manage.cluster:17487] mca: base: components_open: found loaded component vader [manage.cluster:17487] mca: base: components_open: component vader open function successful [manage.cluster:17487] mca: base: components_open: found loaded component tcp [manage.cluster:17487] mca: base: components_open: component tcp open function successful [manage.cluster:17487] mca: base: components_open: found loaded component sm [manage.cluster:17487] mca: base: components_open: component sm open function successful [manage.cluster:17487] mca: base: components_open: found loaded component openib [manage.cluster:17488] select: init of component vader returned success [manage.cluster:17488] select: initializing btl component tcp [manage.cluster:17487] mca: base: components_open: component openib open function successful [manage.cluster:17487] select: initializing btl component self [manage.cluster:17487] select: init of component self returned success [manage.cluster:17487] select: initializing btl component vader [manage.cluster:17488] select: init of component tcp returned success [manage.cluster:17488] select: initializing btl component sm [manage.cluster:17488] select: init of component sm returned success [manage.cluster:17488] select: initializing btl component openib [manage.cluster:17487] select: init of component vader returned success [manage.cluster:17487] select: initializing btl component tcp [manage.cluster:17487] select: init of component tcp returned success [manage.cluster:17487] select: initializing btl component sm [manage.cluster:17488] Checking distance from this process to device=mthca0 [manage.cluster:17488] hwloc_distances->nbobjs=2 [manage.cluster:17488] hwloc_distances->latency[0]=1.000000 [manage.cluster:17488] hwloc_distances->latency[1]=1.600000 [manage.cluster:17488] hwloc_distances->latency[2]=1.600000 [manage.cluster:17488] hwloc_distances->latency[3]=1.000000 [manage.cluster:17488] ibv_obj->type set to NULL [manage.cluster:17488] Process is bound: distance to device is 0.000000 [manage.cluster:17487] select: init of component sm returned success [manage.cluster:17487] select: initializing btl component openib [manage.cluster:17488] openib BTL: rdmacm CPC unavailable for use on mthca0:1; skipped [manage.cluster:17487] Checking distance from this process to device=mthca0 [manage.cluster:17487] hwloc_distances->nbobjs=2 [manage.cluster:17487] hwloc_distances->latency[0]=1.000000 [manage.cluster:17487] hwloc_distances->latency[1]=1.600000 [manage.cluster:17487] hwloc_distances->latency[2]=1.600000 [manage.cluster:17487] hwloc_distances->latency[3]=1.000000 [manage.cluster:17487] ibv_obj->type set to NULL [manage.cluster:17487] Process is bound: distance to device is 0.000000 [manage.cluster:17488] [rank=1] openib: using port mthca0:1 [manage.cluster:17488] select: init of component openib returned success [manage.cluster:17487] openib BTL: rdmacm CPC unavailable for use on mthca0:1; skipped [manage.cluster:17487] [rank=0] openib: using port mthca0:1 [manage.cluster:17487] select: init of component openib returned success [manage.cluster:17488] mca: bml: Using self btl for send to [[18993,1],1] on node manage [manage.cluster:17487] mca: bml: Using self btl for send to [[18993,1],0] on node manage [manage.cluster:17488] mca: bml: Using vader btl for send to [[18993,1],0] on node manage [manage.cluster:17487] mca: bml: Using vader btl for send to [[18993,1],1] on node manage # OSU MPI Bandwidth Test v3.1.1 # Size Bandwidth (MB/s) 1 1.76 2 3.53 4 7.06 8 14.46 16 29.12 32 57.54 64 100.12 128 157.78 256 277.32 512 477.53 1024 894.81 2048 1330.68 4096 278.58 8192 516.00 16384 762.99 32768 1037.19 65536 1181.66 131072 1261.91 262144 1237.39 524288 1247.86 1048576 1252.04 2097152 1273.46 4194304 1281.21 [manage.cluster:17488] mca: base: close: component self closed [manage.cluster:17488] mca: base: close: unloading component self [manage.cluster:17487] mca: base: close: component self closed [manage.cluster:17487] mca: base: close: unloading component self [manage.cluster:17488] mca: base: close: component vader closed [manage.cluster:17488] mca: base: close: unloading component vader [manage.cluster:17487] mca: base: close: component vader closed [manage.cluster:17487] mca: base: close: unloading component vader [manage.cluster:17488] mca: base: close: component tcp closed [manage.cluster:17488] mca: base: close: unloading component tcp [manage.cluster:17487] mca: base: close: component tcp closed [manage.cluster:17487] mca: base: close: unloading component tcp [manage.cluster:17488] mca: base: close: component sm closed [manage.cluster:17488] mca: base: close: unloading component sm [manage.cluster:17487] mca: base: close: component sm closed [manage.cluster:17487] mca: base: close: unloading component sm [manage.cluster:17488] mca: base: close: component openib closed [manage.cluster:17488] mca: base: close: unloading component openib [manage.cluster:17487] mca: base: close: component openib closed [manage.cluster:17487] mca: base: close: unloading component openib Tetsuya Mishima 2016/07/27 9:20:28、"devel"さんは「Re: [OMPI devel] sm BTL performace of the openmpi-2.0.0」で書きました > sm is deprecated in 2.0.0 and will likely be removed in favor of vader in 2.1.0. > > This issue is probably this known issue: https://github.com/open-mpi/ompi-release/pull/1250 > > Please apply those commits and see if it fixes the issue for you. > > -Nathan > > > On Jul 26, 2016, at 6:17 PM, tmish...@jcity.maeda.co.jp wrote: > > > > Hi Gilles, > > > > Thanks. I ran again with --mca pml ob1 but I've got the same results as > > below: > > > > [mishima@manage OMB-3.1.1-openmpi2.0.0]$ mpirun -np 2 -mca pml ob1 -bind-to > > core -report-bindings osu_bw > > [manage.cluster:18142] MCW rank 0 bound to socket 0[core 0[hwt 0]]: > > [B/././././.][./././././.] > > [manage.cluster:18142] MCW rank 1 bound to socket 0[core 1[hwt 0]]: > > [./B/./././.][./././././.] > > # OSU MPI Bandwidth Test v3.1.1 > > # Size Bandwidth (MB/s) > > 1 1.48 > > 2 3.07 > > 4 6.26 > > 8 12.53 > > 16 24.33 > > 32 49.03 > > 64 83.46 > > 128 132.60 > > 256 234.96 > > 512 420.86 > > 1024 842.37 > > 2048 1231.65 > > 4096 264.67 > > 8192 472.16 > > 16384 740.42 > > 32768 1030.39 > > 65536 1191.16 > > 131072 1269.45 > > 262144 1238.33 > > 524288 1247.97 > > 1048576 1257.96 > > 2097152 1274.74 > > 4194304 1280.94 > > [mishima@manage OMB-3.1.1-openmpi2.0.0]$ mpirun -np 2 -mca pml ob1 -mca btl > > self,sm -bind-to core -report-bindings osu_b > > w > > [manage.cluster:18204] MCW rank 0 bound to socket 0[core 0[hwt 0]]: > > [B/././././.][./././././.] > > [manage.cluster:18204] MCW rank 1 bound to socket 0[core 1[hwt 0]]: > > [./B/./././.][./././././.] > > # OSU MPI Bandwidth Test v3.1.1 > > # Size Bandwidth (MB/s) > > 1 0.52 > > 2 1.05 > > 4 2.08 > > 8 4.18 > > 16 8.21 > > 32 16.65 > > 64 32.60 > > 128 66.70 > > 256 132.45 > > 512 269.27 > > 1024 504.63 > > 2048 819.76 > > 4096 874.54 > > 8192 1447.11 > > 16384 2263.28 > > 32768 3236.85 > > 65536 3567.34 > > 131072 3555.17 > > 262144 3455.76 > > 524288 3441.80 > > 1048576 3505.30 > > 2097152 3534.01 > > 4194304 3546.94 > > [mishima@manage OMB-3.1.1-openmpi2.0.0]$ mpirun -np 2 -mca pml ob1 -mca btl > > self,sm,openib -bind-to core -report-binding > > s osu_bw > > [manage.cluster:18218] MCW rank 0 bound to socket 0[core 0[hwt 0]]: > > [B/././././.][./././././.] > > [manage.cluster:18218] MCW rank 1 bound to socket 0[core 1[hwt 0]]: > > [./B/./././.][./././././.] > > # OSU MPI Bandwidth Test v3.1.1 > > # Size Bandwidth (MB/s) > > 1 0.51 > > 2 1.03 > > 4 2.05 > > 8 4.07 > > 16 8.14 > > 32 16.32 > > 64 32.98 > > 128 63.70 > > 256 126.66 > > 512 252.61 > > 1024 480.22 > > 2048 810.54 > > 4096 290.61 > > 8192 512.49 > > 16384 764.60 > > 32768 1036.81 > > 65536 1182.81 > > 131072 1264.48 > > 262144 1235.82 > > 524288 1246.70 > > 1048576 1254.66 > > 2097152 1274.64 > > 4194304 1280.65 > > [mishima@manage OMB-3.1.1-openmpi2.0.0]$ mpirun -np 2 -mca pml ob1 -mca btl > > self,openib -bind-to core -report-bindings o > > su_bw > > [manage.cluster:18276] MCW rank 0 bound to socket 0[core 0[hwt 0]]: > > [B/././././.][./././././.] > > [manage.cluster:18276] MCW rank 1 bound to socket 0[core 1[hwt 0]]: > > [./B/./././.][./././././.] > > # OSU MPI Bandwidth Test v3.1.1 > > # Size Bandwidth (MB/s) > > 1 0.54 > > 2 1.08 > > 4 2.18 > > 8 4.33 > > 16 8.69 > > 32 17.39 > > 64 34.34 > > 128 66.28 > > 256 130.36 > > 512 241.81 > > 1024 429.86 > > 2048 553.44 > > 4096 707.14 > > 8192 879.60 > > 16384 763.02 > > 32768 1042.89 > > 65536 1185.45 > > 131072 1267.56 > > 262144 1227.41 > > 524288 1244.61 > > 1048576 1255.66 > > 2097152 1273.55 > > 4194304 1281.05 > > > > > > 2016/07/27 9:02:49、"devel"さんは「Re: [OMPI devel] sm BTL performace of > > the openmpi-2.0.0」で書きました > >> Hi, > >> > >> > >> can you please run again with > >> > >> --mca pml ob1 > >> > >> > >> if Open MPI was built with mxm support, pml/cm and mtl/mxm are used > >> instead of pml/ob1 and btl/openib > >> > >> > >> Cheers, > >> > >> > >> Gilles > >> > >> > >> On 7/27/2016 8:56 AM, tmish...@jcity.maeda.co.jp wrote: > >>> Hi folks, > >>> > >>> I saw a performance degradation of openmpi-2.0.0 when I ran our > > application > >>> on a node (12cores). So I did 4 tests using osu_bw as below: > >>> > >>> 1: mpirun –np 2 osu_bw bad(30% of test2) > >>> 2: mpirun –np 2 –mca btl self,sm osu_bw good(same as > > openmpi1.10.3) > >>> 3: mpirun –np 2 –mca btl self,sm,openib osu_bw bad(30% of test2) > >>> 4: mpirun –np 2 –mca btl self,openib osu_bw bad(30% of test2) > >>> > >>> I guess openib BTL was used in the test 1 and 3, because these results > > are > >>> almost same as test 4. I believe that sm BTL should be used even in > > the > >>> test 1 and 3, because its priority is higher than openib. > > Unfortunately, at > >>> the moment, I couldn’t figure out the root cause. So please someone > > would > >>> take care of it. > >>> > >>> Regards, > >>> Tetsuya Mishima > >>> > >>> P.S. Here I attached these test results. > >>> > >>> [mishima@manage OMB-3.1.1-openmpi2.0.0]$ mpirun -np 2 -bind-to > > core > >>> -report-bindings osu_bw > >>> [manage.cluster:13389] MCW rank 0 bound to socket 0[core 0 [hwt > > 0]]: > >>> [B/././././.][./././././.] > >>> [manage.cluster:13389] MCW rank 1 bound to socket 0[core 1 [hwt > > 0]]: > >>> [./B/./././.][./././././.] > >>> # OSU MPI Bandwidth Test v3.1.1 > >>> # Size Bandwidth (MB/s) > >>> 1 1.49 > >>> 2 3.04 > >>> 4 6.13 > >>> 8 12.23 > >>> 16 25.01 > >>> 32 49.96 > >>> 64 87.07 > >>> 128 138.87 > >>> 256 245.97 > >>> 512 423.30 > >>> 1024 865.85 > >>> 2048 1279.63 > >>> 4096 264.79 > >>> 8192 473.92 > >>> 16384 739.27 > >>> 32768 1030.49 > >>> 65536 1190.21 > >>> 131072 1270.77 > >>> 262144 1238.74 > >>> 524288 1245.97 > >>> 1048576 1260.09 > >>> 2097152 1274.53 > >>> 4194304 1285.07 > >>> [mishima@manage OMB-3.1.1-openmpi2.0.0]$ mpirun -np 2 -mca btl > > self,sm > >>> -bind-to core -report-bindings osu_bw > >>> [manage.cluster:13448] MCW rank 0 bound to socket 0[core 0 [hwt > > 0]]: > >>> [B/././././.][./././././.] > >>> [manage.cluster:13448] MCW rank 1 bound to socket 0[core 1 [hwt > > 0]]: > >>> [./B/./././.][./././././.] > >>> # OSU MPI Bandwidth Test v3.1.1 > >>> # Size Bandwidth (MB/s) > >>> 1 0.51 > >>> 2 1.01 > >>> 4 2.03 > >>> 8 4.08 > >>> 16 7.92 > >>> 32 16.16 > >>> 64 32.53 > >>> 128 64.30 > >>> 256 128.19 > >>> 512 256.48 > >>> 1024 468.62 > >>> 2048 785.29 > >>> 4096 854.78 > >>> 8192 1404.51 > >>> 16384 2249.20 > >>> 32768 3136.40 > >>> 65536 3495.84 > >>> 131072 3436.69 > >>> 262144 3392.11 > >>> 524288 3400.07 > >>> 1048576 3460.60 > >>> 2097152 3488.09 > >>> 4194304 3498.45 > >>> [mishima@manage OMB-3.1.1-openmpi2.0.0]$ mpirun -np 2 -mca > > btl > >>> self,sm,openib -bind-to core -report-bindings osu_bw > >>> [manage.cluster:13462] MCW rank 0 bound to socket 0[core 0 [hwt > > 0]]: > >>> [B/././././.][./././././.] > >>> [manage.cluster:13462] MCW rank 1 bound to socket 0[core 1 [hwt > > 0]]: > >>> [./B/./././.][./././././.] > >>> # OSU MPI Bandwidth Test v3.1.1 > >>> # Size Bandwidth (MB/s) > >>> 1 0.54 > >>> 2 1.09 > >>> 4 2.18 > >>> 8 4.37 > >>> 16 8.75 > >>> 32 17.37 > >>> 64 34.67 > >>> 128 66.66 > >>> 256 132.55 > >>> 512 261.52 > >>> 1024 489.51 > >>> 2048 818.38 > >>> 4096 290.48 > >>> 8192 511.64 > >>> 16384 765.24 > >>> 32768 1043.28 > >>> 65536 1180.48 > >>> 131072 1261.41 > >>> 262144 1232.86 > >>> 524288 1245.70 > >>> 1048576 1245.69 > >>> 2097152 1268.67 > >>> 4194304 1281.33 > >>> [mishima@manage OMB-3.1.1-openmpi2.0.0]$ mpirun -np 2 -mca btl > > self,openib > >>> -bind-to core -report-bindings osu_bw > >>> [manage.cluster:13521] MCW rank 0 bound to socket 0[core 0 [hwt > > 0]]: > >>> [B/././././.][./././././.] > >>> [manage.cluster:13521] MCW rank 1 bound to socket 0[core 1 [hwt > > 0]]: > >>> [./B/./././.][./././././.] > >>> # OSU MPI Bandwidth Test v3.1.1 > >>> # Size Bandwidth (MB/s) > >>> 1 0.54 > >>> 2 1.08 > >>> 4 2.16 > >>> 8 4.34 > >>> 16 8.64 > >>> 32 17.25 > >>> 64 34.30 > >>> 128 66.13 > >>> 256 129.99 > >>> 512 242.26 > >>> 1024 429.24 > >>> 2048 556.00 > >>> 4096 706.80 > >>> 8192 874.35 > >>> 16384 762.60 > >>> 32768 1039.61 > >>> 65536 1184.03 > >>> 131072 1267.09 > >>> 262144 1230.76 > >>> 524288 1246.92 > >>> 1048576 1255.88 > >>> 2097152 1274.54 > >>> 4194304 > > 1281.63 > >>> _______________________________________________ > >>> devel mailing list > >>> de...@open-mpi.org > >>> Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/devel > >>> Link to this post: > > http://www.open-mpi.org/community/lists/devel/2016/07/19288.php > >> > >> _______________________________________________ > >> devel mailing list > >> de...@open-mpi.org > >> Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/develLink to > > this post: http://www.open-mpi.org/community/lists/devel/2016/07/19289.php > > _______________________________________________ > > devel mailing list > > de...@open-mpi.org > > Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/devel > > Link to this post: http://www.open-mpi.org/community/lists/devel/2016/07/19290.php > > _______________________________________________ > devel mailing list > de...@open-mpi.org > Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/develLink to this post: http://www.open-mpi.org/community/lists/devel/2016/07/19291.php _______________________________________________ devel mailing list de...@open-mpi.org Subscription: https://www.open-mpi.org/mailman/listinfo.cgi/devel Link to this post: http://www.open-mpi.org/community/lists/devel/2016/07/19295.php _______________________________________________ devel mailing list devel@lists.open-mpi.org https://rfd.newmexicoconsortium.org/mailman/listinfo/devel
