QUESTION: Since the error said the system may have run out of queue pairs, how do I determine the # of queue pairs the IB HCA can support?
-----Original Message----- From: users [mailto:users-boun...@open-mpi.org] On Behalf Of Sasso, John (GE Power, Non-GE) Sent: Wednesday, June 15, 2016 2:35 PM To: Open MPI Users Subject: EXT: [OMPI users] "failed to create queue pair" problem, but settings appear OK Chuck, The per-process limits appear fine, including those for the resource mgr daemons: Limit Soft Limit Hard Limit Units Max address space unlimited unlimited bytes Max core file size 0 0 bytes Max cpu time unlimited unlimited seconds Max data size unlimited unlimited bytes Max file locks unlimited unlimited locks Max file size unlimited unlimited bytes Max locked memory unlimited unlimited bytes Max msgqueue size 819200 819200 bytes Max nice priority 0 0 Max open files 16384 16384 files Max pending signals 515625 515625 signals Max processes 515625 515625 processes Max realtime priority 0 0 Max realtime timeout unlimited unlimited us Max resident set unlimited unlimited bytes Max stack size 307200000 unlimited bytes As for the FAQ re registered memory, checking our OpenMPI settings with ompi_info, we have: mpool_rdma_rcache_size_limit = 0 ==> Open MPI will register as much user memory as necessary btl_openib_free_list_max = -1 ==> Open MPI will try to allocate as many registered buffers as it needs btl_openib_eager_rdma_num = 16 btl_openib_max_eager_rdma = 16 btl_openib_eager_limit = 12288 Other suggestions welcome. Hitting a brick wall here. Thanks! --john -----Original Message----- From: users [mailto:users-boun...@open-mpi.org] On Behalf Of Gus Correa Sent: Wednesday, June 15, 2016 1:39 PM To: Open MPI Users Subject: EXT: Re: [OMPI users] "failed to create queue pair" problem, but settings appear OK Hi John 1) For diagnostic, you could check the actual "per process" limits on the nodes while that big job is running: cat /proc/$PID/limits 2) If you're using a resource manager to launch the job, the resource manager daemon/deamons (local to the nodes) may have to to set the memlock and other limits, so that the Open MPI processes inherit them. I use Torque, so I put these lines in the pbs_mom (Torque local daemon) initialization script: # pbs_mom system limits # max file descriptors ulimit -n 32768 # locked memory ulimit -l unlimited # stacksize ulimit -s unlimited 3) See also this FAQ related to registered memory. I set these parameters in /etc/modprobe.d/mlx4_core.conf, but where they're set may depend on the Linux distro/release and the OFED you're using. https://urldefense.proofpoint.com/v2/url?u=https-3A__www.open-2Dmpi.org_faq_-3Fcategory-3Dopenfabrics-23ib-2Dlow-2Dreg-2Dmem&d=CwIF-g&c=IV_clAzoPDE253xZdHuilRgztyh_RiV3wUrLrDQYWSI&r=tqKZ2vRCLufSSXPvzNxBrKr01YPimBPnb-JT-Js0Fmk&m=fkBwjwn1Rvenp2NGwrQM3JtenpfbO_fxYUSK4lrHnzE&s=UFQ0uSWQoNPCfwg9q02YzMJczt7g4jEcaCvYOd46RRA&e= I hope this helps, Gus Correa On 06/15/2016 11:05 AM, Sasso, John (GE Power, Non-GE) wrote: > > In doing testing with IMB, I find that running a 4200+ core case with > the IMB test Alltoall, and message lengths of 16..1024 bytes (as per > -msglog 4:10 IMB option), it fails with: > > ---------------------------------------------------------------------- > ---- > > A process failed to create a queue pair. This usually means either > > the device has run out of queue pairs (too many connections) or > > there are insufficient resources available to allocate a queue pair > > (out of memory). The latter can happen if either 1) insufficient > > memory is available, or 2) no more physical memory can be registered > > with the device. > > For more information on memory registration see the Open MPI FAQs at: > > https://urldefense.proofpoint.com/v2/url?u=http-3A__www.open-2Dmpi.org > _faq_-3Fcategory-3Dopenfabrics-23ib-2Dlocked-2Dpages&d=CwIF-g&c=IV_clA > zoPDE253xZdHuilRgztyh_RiV3wUrLrDQYWSI&r=tqKZ2vRCLufSSXPvzNxBrKr01YPimB > Pnb-JT-Js0Fmk&m=fkBwjwn1Rvenp2NGwrQM3JtenpfbO_fxYUSK4lrHnzE&s=dKT5yJta > 2xW_ZUh06x95KTWjE1LgO8NU3OsjbwQsYLc&e= > > Local host: node7106 > > Local device: mlx4_0 > > Queue pair type: Reliable connected (RC) > > ---------------------------------------------------------------------- > ---- > > [node7106][[51922,1],0][connect/btl_openib_connect_oob.c:867:rml_recv_ > cb] > error in endpoint reply start connect > > [node7106:06503] [[51922,0],0]-[[51922,1],0] mca_oob_tcp_msg_recv: > readv failed: Connection reset by peer (104) > > ---------------------------------------------------------------------- > ---- > > mpirun has exited due to process rank 0 with PID 6504 on > > node node7106 exiting improperly. There are two reasons this could occur: > > 1. this process did not call "init" before exiting, but others in > > the job did. This can cause a job to hang indefinitely while it waits > > for all processes to call "init". By rule, if one process calls > "init", > > then ALL processes must call "init" prior to termination. > > 2. this process called "init", but exited without calling "finalize". > > By rule, all processes that call "init" MUST call "finalize" prior to > > exiting or it will be considered an "abnormal termination" > > This may have caused other processes in the application to be > > terminated by signals sent by mpirun (as reported here). > > ---------------------------------------------------------------------- > ---- > > Yes, these are ALL of the error messages. I did not get a message > about not being able to register enough memory. I verified that > log_num_mtt = 24 and log_mtts_per_seg = 0 (via catting of their files > in /sys/module/mlx4_core/parameters and what is set in > /etc/modprobe.d/mlx4_core.conf). While such a large-scale job runs, I > run 'vmstat 10' to examine memory usage, but there appears to be a > good amount of memory still available and swap is never used. In > terms of settings in /etc/security/limits.conf: > > * soft memlock unlimited > > * hard memlock unlimited > > * soft stack 300000 > > * hard stack unlimited > > I don't know if btl_openib_connect_oob.c or mca_oob_tcp_msg_recv are > clues, but I am now at a loss as to where the problem lies. > > This is for an application using OpenMPI 1.6.5, and the systems have > Mellanox OFED 3.1.1 installed. > > *--john* > > > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: > https://urldefense.proofpoint.com/v2/url?u=https-3A__www.open-2Dmpi.or > g_mailman_listinfo.cgi_users&d=CwIF-g&c=IV_clAzoPDE253xZdHuilRgztyh_Ri > V3wUrLrDQYWSI&r=tqKZ2vRCLufSSXPvzNxBrKr01YPimBPnb-JT-Js0Fmk&m=fkBwjwn1 > Rvenp2NGwrQM3JtenpfbO_fxYUSK4lrHnzE&s=jTwvPXqRGWpfeRFC_6XkYAx5DH99crNb > mWhBN9r1hdg&e= Link to this post: > https://urldefense.proofpoint.com/v2/url?u=http-3A__www.open-2Dmpi.org > _community_lists_users_2016_06_29455.php&d=CwIF-g&c=IV_clAzoPDE253xZdH > uilRgztyh_RiV3wUrLrDQYWSI&r=tqKZ2vRCLufSSXPvzNxBrKr01YPimBPnb-JT-Js0Fm > k&m=fkBwjwn1Rvenp2NGwrQM3JtenpfbO_fxYUSK4lrHnzE&s=8xTBNYgBKnKVf6SD7vEn > 3-wizYAxVVSS63L5bCdfidE&e= _______________________________________________ users mailing list us...@open-mpi.org Subscription: https://urldefense.proofpoint.com/v2/url?u=https-3A__www.open-2Dmpi.org_mailman_listinfo.cgi_users&d=CwIF-g&c=IV_clAzoPDE253xZdHuilRgztyh_RiV3wUrLrDQYWSI&r=tqKZ2vRCLufSSXPvzNxBrKr01YPimBPnb-JT-Js0Fmk&m=fkBwjwn1Rvenp2NGwrQM3JtenpfbO_fxYUSK4lrHnzE&s=jTwvPXqRGWpfeRFC_6XkYAx5DH99crNbmWhBN9r1hdg&e= Link to this post: https://urldefense.proofpoint.com/v2/url?u=http-3A__www.open-2Dmpi.org_community_lists_users_2016_06_29458.php&d=CwIF-g&c=IV_clAzoPDE253xZdHuilRgztyh_RiV3wUrLrDQYWSI&r=tqKZ2vRCLufSSXPvzNxBrKr01YPimBPnb-JT-Js0Fmk&m=fkBwjwn1Rvenp2NGwrQM3JtenpfbO_fxYUSK4lrHnzE&s=uK1Ww0uehyaqSfXOtAt3Lqhers5lzDnBPhdDVCQx_hk&e= _______________________________________________ users mailing list us...@open-mpi.org Subscription: https://urldefense.proofpoint.com/v2/url?u=https-3A__www.open-2Dmpi.org_mailman_listinfo.cgi_users&d=CwICAg&c=IV_clAzoPDE253xZdHuilRgztyh_RiV3wUrLrDQYWSI&r=tqKZ2vRCLufSSXPvzNxBrKr01YPimBPnb-JT-Js0Fmk&m=wfoogAf9WJFU5BkEyYvxgk4izDUvAfO8MYCQXiucJoA&s=2l_p5Kv-f-eUrtBHVrFzSSfD0J44dpVMI_9HXv8z6M0&e= Link to this post: https://urldefense.proofpoint.com/v2/url?u=http-3A__www.open-2Dmpi.org_community_lists_users_2016_06_29459.php&d=CwICAg&c=IV_clAzoPDE253xZdHuilRgztyh_RiV3wUrLrDQYWSI&r=tqKZ2vRCLufSSXPvzNxBrKr01YPimBPnb-JT-Js0Fmk&m=wfoogAf9WJFU5BkEyYvxgk4izDUvAfO8MYCQXiucJoA&s=DtkJHiJd9cKWvqDjW4r2B_pCgVFjsOHxGTNXhTYvHbc&e=
