[gpfsug-discuss] VERBS RDMA issue
Tushar Pathare
tpathare at sidra.org
Sun May 21 09:40:42 BST 2017
Hello Team,
We are facing a lot of messages waiters related to waiting for conn rdmas < conn maxrdmas<https://www.mail-archive.com/search?l=gpfsug-discuss@spectrumscale.org&q=subject:%22Re%5C%3A+%5C%5Bgpfsug%5C-discuss%5C%5D+waiting+for+conn+rdmas+%3C+conn+maxrdmas%22&o=newest>
Is there some recommended settings to resolve this issue.?
Our config for RDMA is as follows for 140 nodes(32 cores each)
VERBS RDMA Configuration:
Status : started
Start time : Thu
Stats reset time : Thu
Dump time : Sun
mmfs verbsRdma : enable
mmfs verbsRdmaCm : disable
mmfs verbsPorts : mlx4_0/1 mlx4_0/2
mmfs verbsRdmasPerNode : 3200
mmfs verbsRdmasPerNode (max) : 3200
mmfs verbsRdmasPerNodeOptimize : yes
mmfs verbsRdmasPerConnection : 16
mmfs verbsRdmasPerConnection (max) : 16
mmfs verbsRdmaMinBytes : 16384
mmfs verbsRdmaRoCEToS : -1
mmfs verbsRdmaQpRtrMinRnrTimer : 18
mmfs verbsRdmaQpRtrPathMtu : 2048
mmfs verbsRdmaQpRtrSl : 0
mmfs verbsRdmaQpRtrSlDynamic : no
mmfs verbsRdmaQpRtrSlDynamicTimeout : 10
mmfs verbsRdmaQpRtsRnrRetry : 6
mmfs verbsRdmaQpRtsRetryCnt : 6
mmfs verbsRdmaQpRtsTimeout : 18
mmfs verbsRdmaMaxSendBytes : 16777216
mmfs verbsRdmaMaxSendSge : 27
mmfs verbsRdmaSend : yes
mmfs verbsRdmaSerializeRecv : no
mmfs verbsRdmaSerializeSend : no
mmfs verbsRdmaUseMultiCqThreads : yes
mmfs verbsSendBufferMemoryMB : 1024
mmfs verbsLibName : libibverbs.so
mmfs verbsRdmaCmLibName : librdmacm.so
mmfs verbsRdmaMaxReconnectInterval : 60
mmfs verbsRdmaMaxReconnectRetries : -1
mmfs verbsRdmaReconnectAction : disable
mmfs verbsRdmaReconnectThreads : 32
mmfs verbsHungRdmaTimeout : 90
ibv_fork_support : true
Max connections : 196608
Max RDMA size : 16777216
Target number of vsend buffs : 16384
Initial vsend buffs per conn : 59
nQPs : 140
nCQs : 282
nCMIDs : 0
nDtoThreads : 2
nextIndex : 141
Number of Devices opened : 1
Device : mlx4_0
vendor_id : 713
Device vendor_part_id : 4099
Device mem register chunk : 8589934592 (0x200000000)
Device max_sge : 32
Adjusted max_sge : 0
Adjusted max_sge vsend : 30
Device max_qp_wr : 16351
Device max_qp_rd_atom : 16
Open Connect Ports : 1
verbsConnectPorts[0] : mlx4_0/1/0
lid : 129
state : IBV_PORT_ACTIVE
path_mtu : 2048
interface ID : 0xe41d2d030073b9d1
sendChannel.ib_channel : 0x7FA6CB816200
sendChannel.dtoThreadP : 0x7FA6CB821870
sendChannel.dtoThreadId : 12540
sendChannel.nFreeCq : 1
recvChannel.ib_channel : 0x7FA6CB81D590
recvChannel.dtoThreadP : 0x7FA6CB822BA0
recvChannel.dtoThreadId : 12541
recvChannel.nFreeCq : 1
ibv_cq : 0x7FA2724C81F8
ibv_cq.cqP : 0x0
ibv_cq.nEvents : 0
ibv_cq.contextP : 0x0
ibv_cq.ib_channel : 0x0
Thanks
Tushar B Pathare MBA IT,BE IT
Bigdata & GPFS
Software Development & Databases
Scientific Computing
Bioinformatics Division
Research
"What ever the mind of man can conceive and believe, drill can query"
Sidra Medical and Research Centre
Sidra OPC Building
Sidra Medical & Research Center
PO Box 26999
Al Luqta Street
Education City North Campus
Qatar Foundation, Doha, Qatar
Office 4003 3333 ext 37443 | M +974 74793547
tpathare at sidra.org<mailto:tpathare at sidra.org> | www.sidra.org<http://www.sidra.org/>
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