[mpich-discuss] Mpich over RDMA sample
Zhou, Hui
zhouh at anl.gov
Tue Jun 18 11:05:27 CDT 2024
Niyaz,
FYI -https://urldefense.us/v3/__https://ofiwg.github.io/libfabric/v1.21.0/man/fi_provider.7.html__;!!G_uCfscf7eWS!Z-ju_mFvcfItasVHydCwS8PBDxrKUNt0Qhpc_A-fBZVtuiGT0SEErcNkNECkd0UPEwT9GtRQR0Rj$
Hui
________________________________
From: Niyaz Murshed <Niyaz.Murshed at arm.com>
Sent: Tuesday, June 18, 2024 11:00 AM
To: Zhou, Hui <zhouh at anl.gov>; discuss at mpich.org <discuss at mpich.org>
Cc: nd <nd at arm.com>
Subject: Re: Mpich over RDMA sample
Hi Hui, When you say message semantic, do you mean endpoint type message ? Mpich is running over libfabric. When I run sample application on libfabric, it does have message endpoints over RMA. From: Zhou, Hui <zhouh@ anl. gov> Date: Tuesday,
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Hi Hui,
When you say message semantic, do you mean endpoint type message ?
Mpich is running over libfabric.
When I run sample application on libfabric, it does have message endpoints over RMA.
From: Zhou, Hui <zhouh at anl.gov>
Date: Tuesday, June 18, 2024 at 9:44 AM
To: Niyaz Murshed <Niyaz.Murshed at arm.com>, discuss at mpich.org <discuss at mpich.org>
Cc: nd <nd at arm.com>
Subject: Re: Mpich over RDMA sample
The "verbs" provider alone does not provide the message semantics we needed for MPI. "ofi_rxm" is the utility provider that provides the message semantics. "verbs;ofi_rxm" is the provider combination you want.
Hui
________________________________
From: Niyaz Murshed <Niyaz.Murshed at arm.com>
Sent: Tuesday, June 18, 2024 9:14 AM
To: Zhou, Hui <zhouh at anl.gov>; discuss at mpich.org <discuss at mpich.org>
Cc: nd <nd at arm.com>
Subject: Re: Mpich over RDMA sample
Hi Hui, I have set the env variable to FI_PROVIDER=verbs , after thich I get the below. libfabric provider: verbs;ofi_rxm - IB-0xfe80000000000000 It does not chose just “verbs” , it selects verbs;ofi_rxf I am wanting to select the below: provider:
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Hi Hui,
I have set the env variable to FI_PROVIDER=verbs , after thich I get the below.
libfabric provider: verbs;ofi_rxm - IB-0xfe80000000000000
It does not chose just “verbs” , it selects verbs;ofi_rxf
I am wanting to select the below:
provider: verbs, score = 0, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
I would really like to thank you for such fast responses.
From: Zhou, Hui <zhouh at anl.gov>
Date: Tuesday, June 18, 2024 at 8:58 AM
To: Niyaz Murshed <Niyaz.Murshed at arm.com>, discuss at mpich.org <discuss at mpich.org>
Cc: nd <nd at arm.com>
Subject: Re: Mpich over RDMA sample
Niyaz,
Set environment variable FI_PROVIDER=verbs to select the verbs provider.
Hui
________________________________
From: Niyaz Murshed <Niyaz.Murshed at arm.com>
Sent: Monday, June 17, 2024 8:57 PM
To: Zhou, Hui <zhouh at anl.gov>; discuss at mpich.org <discuss at mpich.org>
Cc: nd <nd at arm.com>
Subject: Re: Mpich over RDMA sample
Hi Hui, I would still need some assistance in this. I am not able to make mpich chose verbs provider ☹ With the log : provider: verbs, score = 0, pref = 0, FI_SOCKADDR_IN [16] 192. 168. 2. 200 Is my assumption to think the above log represent
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Hi Hui,
I would still need some assistance in this. I am not able to make mpich chose verbs provider ☹
With the log :
provider: verbs, score = 0, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
Is my assumption to think the above log represent that verbs provider knows about a path to 192.168.2.200 ?
How does the application hello-world decide which provider to use?
Running on server: 192.168.2.100
root at ampere-altra-2-1# FI_PROVIDER=verbs MPIR_CVAR_DEBUG_SUMMARY=1 mpirun -n 5 -hosts 192.168.2.200,192.168.2.100 /mpich/examples/a.out
==== Various sizes and limits ====
sizeof(MPIDI_per_vci_t): 192
Required minimum FI_VERSION: 0, current version: 10015
provider: verbs, score = 0, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: verbs, score = 0, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: verbs, score = 0, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs, score = 0, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs, score = 0, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: verbs, score = 0, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: verbs, score = 0, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs, score = 0, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs, score = 0, pref = 0, FI_FORMAT_UNSPEC [32]
provider: verbs, score = 0, pref = 0, FI_FORMAT_UNSPEC [32]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxd, score = 5, pref = -2, FI_FORMAT_UNSPEC [32]
provider: verbs;ofi_rxd, score = 5, pref = -2, FI_FORMAT_UNSPEC [32]
Required minimum FI_VERSION: 10006, current version: 10015
==== Capability set configuration ====
libfabric provider: verbs;ofi_rxm - IB-0xfe80000000000000
MPIDI_OFI_ENABLE_DATA: 0
MPIDI_OFI_ENABLE_AV_TABLE: 1
MPIDI_OFI_ENABLE_SCALABLE_ENDPOINTS: 0
MPIDI_OFI_ENABLE_SHARED_CONTEXTS: 0
MPIDI_OFI_ENABLE_MR_VIRT_ADDRESS: 1
MPIDI_OFI_ENABLE_MR_ALLOCATED: 1
MPIDI_OFI_ENABLE_MR_REGISTER_NULL: 1
MPIDI_OFI_ENABLE_MR_PROV_KEY: 1
MPIDI_OFI_ENABLE_TAGGED: 1
MPIDI_OFI_ENABLE_AM: 1
MPIDI_OFI_ENABLE_RMA: 1
MPIDI_OFI_ENABLE_ATOMICS: 0
MPIDI_OFI_FETCH_ATOMIC_IOVECS: 1
MPIDI_OFI_ENABLE_DATA_AUTO_PROGRESS: 0
MPIDI_OFI_ENABLE_CONTROL_AUTO_PROGRESS: 0
MPIDI_OFI_ENABLE_PT2PT_NOPACK: 1
MPIDI_OFI_ENABLE_TRIGGERED: 0
MPIDI_OFI_ENABLE_HMEM: 0
MPIDI_OFI_NUM_AM_BUFFERS: 8
MPIDI_OFI_NUM_OPTIMIZED_MEMORY_REGIONS: 0
MPIDI_OFI_CONTEXT_BITS: 16
MPIDI_OFI_SOURCE_BITS: 23
MPIDI_OFI_TAG_BITS: 20
MPIDI_OFI_VNI_USE_DOMAIN: 1
MAXIMUM SUPPORTED RANKS: 8388608
MAXIMUM TAG: 1048576
==== Provider global thresholds ====
max_buffered_send: 192
max_buffered_write: 192
max_msg_size: 1073741824
max_order_raw: 1073741824
max_order_war: 0
max_order_waw: 1073741824
tx_iov_limit: 4
rx_iov_limit: 4
rma_iov_limit: 1
max_mr_key_size: 4
==== Various sizes and limits ====
MPIDI_OFI_AM_MSG_HEADER_SIZE: 24
MPIDI_OFI_MAX_AM_HDR_SIZE: 255
sizeof(MPIDI_OFI_am_request_header_t): 416
sizeof(MPIDI_OFI_per_vci_t): 52480
MPIDI_OFI_AM_HDR_POOL_CELL_SIZE: 1024
MPIDI_OFI_DEFAULT_SHORT_SEND_SIZE: 16384
Assertion failed in file src/mpid/ch4/netmod/ofi/init_addrxchg.c at line 151: mapped_table[i] != FI_ADDR_NOTAVAIL
Assertion failed in file src/mpid/ch4/netmod/ofi/init_addrxchg.c at line 151: mapped_table[i] != FI_ADDR_NOTAVAIL
Assertion failed in file src/mpid/ch4/netmod/ofi/init_addrxchg.c at line 151: mapped_table[i] != FI_ADDR_NOTAVAIL
Assertion failed in file src/mpid/ch4/netmod/ofi/init_addrxchg.c at line 151: mapped_table[i] != FI_ADDR_NOTAVAIL
Assertion failed in file src/mpid/ch4/netmod/ofi/init_addrxchg.c at line 151: mapped_table[i] != FI_ADDR_NOTAVAIL
If I do not use the FI_PROVIDER=verbs, it will work over sockets.
root at ampere-altra-2-1: # MPIR_CVAR_DEBUG_SUMMARY=1 mpirun -n 5 -hosts 192.168.2.200,192.168.2.100 /mpich/examples/a.out
==== Various sizes and limits ====
sizeof(MPIDI_per_vci_t): 192
Required minimum FI_VERSION: 0, current version: 10015
provider: verbs, score = 0, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: verbs, score = 0, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: verbs, score = 0, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs, score = 0, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs, score = 0, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: verbs, score = 0, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: verbs, score = 0, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs, score = 0, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs, score = 0, pref = 0, FI_FORMAT_UNSPEC [32]
provider: verbs, score = 0, pref = 0, FI_FORMAT_UNSPEC [32]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: tcp, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: tcp, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: tcp, score = 4, pref = 0, FI_SOCKADDR_IN [16] 10.118.91.159
provider: tcp, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::be97:e1ff:fe9d:7caa
provider: tcp, score = 4, pref = 0, FI_SOCKADDR_IN [16] 127.0.0.1
provider: tcp, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] ::1
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 10.118.91.159
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::be97:e1ff:fe9d:7caa
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 127.0.0.1
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] ::1
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 10.118.91.159
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::be97:e1ff:fe9d:7caa
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 127.0.0.1
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] ::1
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 10.118.91.159
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::be97:e1ff:fe9d:7caa
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 127.0.0.1
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] ::1
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: verbs;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IB [48]
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 10.118.91.159
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::be97:e1ff:fe9d:7caa
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN [16] 127.0.0.1
provider: tcp;ofi_rxm, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] ::1
provider: verbs;ofi_rxd, score = 5, pref = -2, FI_FORMAT_UNSPEC [32]
provider: verbs;ofi_rxd, score = 5, pref = -2, FI_FORMAT_UNSPEC [32]
provider: udp;ofi_rxd, score = 5, pref = -2, FI_SOCKADDR_IN [16] 192.168.2.200
provider: udp;ofi_rxd, score = 5, pref = -2, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: udp;ofi_rxd, score = 5, pref = -2, FI_SOCKADDR_IN [16] 10.118.91.159
provider: udp;ofi_rxd, score = 5, pref = -2, FI_SOCKADDR_IN6 [28] fe80::be97:e1ff:fe9d:7caa
provider: udp;ofi_rxd, score = 5, pref = -2, FI_SOCKADDR_IN [16] 127.0.0.1
provider: udp;ofi_rxd, score = 5, pref = -2, FI_SOCKADDR_IN6 [28] ::1
provider: shm, score = 4, pref = -2, FI_ADDR_STR [14] - fi_shm://1177
provider: shm, score = 4, pref = -2, FI_ADDR_STR [14] - fi_shm://1177
provider: udp, score = 0, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: udp, score = 0, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: udp, score = 0, pref = 0, FI_SOCKADDR_IN [16] 10.118.91.159
provider: udp, score = 0, pref = 0, FI_SOCKADDR_IN6 [28] fe80::be97:e1ff:fe9d:7caa
provider: udp, score = 0, pref = 0, FI_SOCKADDR_IN [16] 127.0.0.1
provider: udp, score = 0, pref = 0, FI_SOCKADDR_IN6 [28] ::1
provider: tcp, score = 0, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: tcp, score = 0, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: tcp, score = 0, pref = 0, FI_SOCKADDR_IN [16] 10.118.91.159
provider: tcp, score = 0, pref = 0, FI_SOCKADDR_IN6 [28] fe80::be97:e1ff:fe9d:7caa
provider: tcp, score = 0, pref = 0, FI_SOCKADDR_IN [16] 127.0.0.1
provider: tcp, score = 0, pref = 0, FI_SOCKADDR_IN6 [28] ::1
provider: tcp, score = 4, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: tcp, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: tcp, score = 4, pref = 0, FI_SOCKADDR_IN [16] 10.118.91.159
provider: tcp, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] fe80::be97:e1ff:fe9d:7caa
provider: tcp, score = 4, pref = 0, FI_SOCKADDR_IN [16] 127.0.0.1
provider: tcp, score = 4, pref = 0, FI_SOCKADDR_IN6 [28] ::1
provider: sockets, score = 3, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: sockets, score = 3, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: sockets, score = 3, pref = 0, FI_SOCKADDR_IN [16] 10.118.91.159
provider: sockets, score = 3, pref = 0, FI_SOCKADDR_IN6 [28] fe80::be97:e1ff:fe9d:7caa
provider: sockets, score = 3, pref = 0, FI_SOCKADDR_IN [16] 127.0.0.1
provider: sockets, score = 3, pref = 0, FI_SOCKADDR_IN6 [28] ::1
provider: sockets, score = 5, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: sockets, score = 5, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: sockets, score = 5, pref = 0, FI_SOCKADDR_IN [16] 10.118.91.159
provider: sockets, score = 5, pref = 0, FI_SOCKADDR_IN6 [28] fe80::be97:e1ff:fe9d:7caa
provider: sockets, score = 5, pref = 0, FI_SOCKADDR_IN [16] 127.0.0.1
provider: sockets, score = 5, pref = 0, FI_SOCKADDR_IN6 [28] ::1
provider: sockets, score = 5, pref = 0, FI_SOCKADDR_IN [16] 192.168.2.200
provider: sockets, score = 5, pref = 0, FI_SOCKADDR_IN6 [28] fe80::526b:4bff:fefc:1342
provider: sockets, score = 5, pref = 0, FI_SOCKADDR_IN [16] 10.118.91.159
provider: sockets, score = 5, pref = 0, FI_SOCKADDR_IN6 [28] fe80::be97:e1ff:fe9d:7caa
provider: sockets, score = 5, pref = 0, FI_SOCKADDR_IN [16] 127.0.0.1
provider: sockets, score = 5, pref = 0, FI_SOCKADDR_IN6 [28] ::1
provider: sm2, score = 3, pref = 0, FI_ADDR_STR [13] - fi_sm2://1177
provider: sm2, score = 3, pref = 0, FI_ADDR_STR [13] - fi_sm2://1177
Required minimum FI_VERSION: 10005, current version: 10015
==== Capability set configuration ====
libfabric provider: sockets - 192.168.2.0/24
MPIDI_OFI_ENABLE_DATA: 1
MPIDI_OFI_ENABLE_AV_TABLE: 1
MPIDI_OFI_ENABLE_SCALABLE_ENDPOINTS: 1
MPIDI_OFI_ENABLE_SHARED_CONTEXTS: 0
MPIDI_OFI_ENABLE_MR_VIRT_ADDRESS: 0
MPIDI_OFI_ENABLE_MR_ALLOCATED: 0
MPIDI_OFI_ENABLE_MR_REGISTER_NULL: 1
MPIDI_OFI_ENABLE_MR_PROV_KEY: 0
MPIDI_OFI_ENABLE_TAGGED: 1
MPIDI_OFI_ENABLE_AM: 1
MPIDI_OFI_ENABLE_RMA: 1
MPIDI_OFI_ENABLE_ATOMICS: 1
MPIDI_OFI_FETCH_ATOMIC_IOVECS: 1
MPIDI_OFI_ENABLE_DATA_AUTO_PROGRESS: 0
MPIDI_OFI_ENABLE_CONTROL_AUTO_PROGRESS: 0
MPIDI_OFI_ENABLE_PT2PT_NOPACK: 1
MPIDI_OFI_ENABLE_TRIGGERED: 0
MPIDI_OFI_ENABLE_HMEM: 0
MPIDI_OFI_NUM_AM_BUFFERS: 8
MPIDI_OFI_NUM_OPTIMIZED_MEMORY_REGIONS: 0
MPIDI_OFI_CONTEXT_BITS: 20
MPIDI_OFI_SOURCE_BITS: 0
MPIDI_OFI_TAG_BITS: 31
MPIDI_OFI_VNI_USE_DOMAIN: 1
MAXIMUM SUPPORTED RANKS: 4294967296
MAXIMUM TAG: 2147483648
==== Provider global thresholds ====
max_buffered_send: 255
max_buffered_write: 255
max_msg_size: 9223372036854775807
max_order_raw: -1
max_order_war: -1
max_order_waw: -1
tx_iov_limit: 8
rx_iov_limit: 8
rma_iov_limit: 8
max_mr_key_size: 8
==== Various sizes and limits ====
MPIDI_OFI_AM_MSG_HEADER_SIZE: 24
MPIDI_OFI_MAX_AM_HDR_SIZE: 255
sizeof(MPIDI_OFI_am_request_header_t): 416
sizeof(MPIDI_OFI_per_vci_t): 52480
MPIDI_OFI_AM_HDR_POOL_CELL_SIZE: 1024
MPIDI_OFI_DEFAULT_SHORT_SEND_SIZE: 16384
==== OFI dynamic settings ====
num_vcis: 1
num_nics: 1
======================================
error checking : enabled
QMPI : disabled
debugger support : disabled
thread level : MPI_THREAD_SINGLE
thread CS : per-vci
threadcomm : enabled
==== data structure summary ====
sizeof(MPIR_Comm): 1808
sizeof(MPIR_Request): 512
sizeof(MPIR_Datatype): 280
================================
Hello world from process 0 of 5
Hello world from process 2 of 5
Hello world from process 1 of 5
Hello world from process 4 of 5
Hello world from process 3 of 5
From: Zhou, Hui <zhouh at anl.gov>
Date: Wednesday, June 12, 2024 at 7:22 PM
To: Niyaz Murshed <Niyaz.Murshed at arm.com>, discuss at mpich.org <discuss at mpich.org>
Subject: Re: Mpich over RDMA sample
It’s possible that the native path for RMA on verbs are turned off due to verbs does not meet MPI’s full atomic ordering semantics. We’ll check and follow up.
--
Hui Zhou
From: Niyaz Murshed <Niyaz.Murshed at arm.com>
Date: Wednesday, June 12, 2024 at 3:59 PM
To: Zhou, Hui <zhouh at anl.gov>, discuss at mpich.org <discuss at mpich.org>
Cc: nd <nd at arm.com>
Subject: Re: Mpich over RDMA sample
I think image is not gone : https: //ibb. co/RDGnJfy From: Niyaz Murshed <Niyaz. Murshed@ arm. com> Date: Wednesday, June 12, 2024 at 3: 56 PM To: Zhou, Hui <zhouh@ anl. gov>, discuss@ mpich. org <discuss@ mpich. org> Cc: nd <nd@ arm. com>
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I think image is not gone : https://urldefense.us/v3/__https://ibb.co/RDGnJfy__;!!G_uCfscf7eWS!Z-ju_mFvcfItasVHydCwS8PBDxrKUNt0Qhpc_A-fBZVtuiGT0SEErcNkNECkd0UPEwT9GpLPtEw2$ <https://urldefense.us/v3/__https:/ibb.co/RDGnJfy__;!!G_uCfscf7eWS!YH6L3OHfPHd8aABguKjC1E2ZLYeI_yAUdgQlvdFFY5HHl8tDGe186dWz5LcggM9kcgEiwET4m3XOQ-HTMpo$>
From: Niyaz Murshed <Niyaz.Murshed at arm.com>
Date: Wednesday, June 12, 2024 at 3:56 PM
To: Zhou, Hui <zhouh at anl.gov>, discuss at mpich.org <discuss at mpich.org>
Cc: nd <nd at arm.com>
Subject: Re: Mpich over RDMA sample
Thank you Hui for the reply.
I was expecting to see RoCE messages in the packet capture.
When I use verbs on libfabric sample tests, I see the RoCE messages as below :
[cid:image001.png at 01DABCE1.0D6BE810]
From: Zhou, Hui <zhouh at anl.gov>
Date: Wednesday, June 12, 2024 at 3:41 PM
To: Niyaz Murshed <Niyaz.Murshed at arm.com>, discuss at mpich.org <discuss at mpich.org>
Cc: nd <nd at arm.com>
Subject: Re: Mpich over RDMA sample
Niyaz,
ofi_rxm:verbs is the correct provider. The ofi_rxm provides the verbs provider additional messaging semantics that are needed to be used in MPI.
--
Hui Zhou
From: Niyaz Murshed <Niyaz.Murshed at arm.com>
Date: Wednesday, June 12, 2024 at 2:54 PM
To: Zhou, Hui <zhouh at anl.gov>, discuss at mpich.org <discuss at mpich.org>
Cc: nd <nd at arm.com>
Subject: Re: Mpich over RDMA sample
Thank you for the reply. I did that; however, it selects ofi_rxm: verbs libfabric: 412098: 1718221892: : ofi_rxm: av: ofi_av_insert_addr(): 313<info> fi_addr: 1 libfabric: 412099: 1718221892: : ofi_rxm: av: ofi_av_insert_addr(): 313<info> fi_addr:
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Thank you for the reply.
I did that; however, it selects ofi_rxm:verbs
libfabric:412098:1718221892::ofi_rxm:av:ofi_av_insert_addr():313<info> fi_addr: 1
libfabric:412099:1718221892::ofi_rxm:av:ofi_av_insert_addr():313<info> fi_addr: 1
options:
backend: cpu
iters: 16
warmup_iters: 16
cache: 1
min_elem_count: 1
max_elem_count: 1
elem_counts: [1]
validate: last
window_size: 64
#------------------------------------------------------------
# Benchmarking: Bandwidth
# #processes: 2
#------------------------------------------------------------
#bytes #repetitions Mbytes/sec
4 16 0.02
# All done
libfabric:412098:1718221892::ofi_rxm:ep_ctrl:rxm_stop_listen():864<info> stopping CM thread
libfabric:412099:1718221892::ofi_rxm:ep_ctrl:rxm_stop_listen():864<info> stopping CM thread
As per https://urldefense.us/v3/__https://www.intel.com/content/www/us/en/docs/mpi-library/developer-guide-linux/2021-6/ofi-providers-support.html__;!!G_uCfscf7eWS!Z-ju_mFvcfItasVHydCwS8PBDxrKUNt0Qhpc_A-fBZVtuiGT0SEErcNkNECkd0UPEwT9Gq68KSVi$ <https://urldefense.us/v3/__https:/www.intel.com/content/www/us/en/docs/mpi-library/developer-guide-linux/2021-6/ofi-providers-support.html__;!!G_uCfscf7eWS!YajPk9G-sPCEDt44nrZQrYG8r7V_s953AsKjQ4w_vW5OzcjJXfdGHOINW-PEYIw-IcISZSCw1xIsIoJ-dbE$> , we need to add FI_PROVIDER=^ofi_rxm , but if do that, it moves back to sockets provider.
Is here a way to combine ^ofi_rxm and verbs
From: Zhou, Hui <zhouh at anl.gov>
Date: Wednesday, June 12, 2024 at 2:41 PM
To: Niyaz Murshed <Niyaz.Murshed at arm.com>, discuss at mpich.org <discuss at mpich.org>
Cc: nd <nd at arm.com>
Subject: Re: Mpich over RDMA sample
Niyaz,
All you need to do is to set an environment variable `FI_PROVIDER=verbs`.
--
Hui Zhou
From: Niyaz Murshed <Niyaz.Murshed at arm.com>
Date: Wednesday, June 12, 2024 at 1:23 PM
To: Zhou, Hui <zhouh at anl.gov>, discuss at mpich.org <discuss at mpich.org>
Cc: nd <nd at arm.com>
Subject: Re: Mpich over RDMA sample
When testing with Libfabric, verbs provider is selected. I did have to use “-e msg -d mlx5_1” so that it selects verbs. I was checking if there is anything like that for mpich sample tests. Else might need to do some hack in the code to force
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When testing with Libfabric, verbs provider is selected. I did have to use “-e msg -d mlx5_1” so that it selects verbs.
I was checking if there is anything like that for mpich sample tests. Else might need to do some hack in the code to force the selection of verbs.
From: Zhou, Hui <zhouh at anl.gov>
Date: Wednesday, June 12, 2024 at 1:15 PM
To: discuss at mpich.org <discuss at mpich.org>
Cc: Niyaz Murshed <Niyaz.Murshed at arm.com>, nd <nd at arm.com>
Subject: Re: Mpich over RDMA sample
Libfabric support multiple providers. Sounds like it was selecting the sockets or tcp provider rather than a provider that support RoCE. I am not exactly sure whether the verbs provider will do that. If you can confirm the provider using libfabric tests, then you can try forcing MPICH to use that provider by setting the FI_PROVIDER environment variable.
--
Hui Zhou
From: Niyaz Murshed via discuss <discuss at mpich.org>
Date: Wednesday, June 12, 2024 at 9:03 AM
To: discuss at mpich.org <discuss at mpich.org>
Cc: Niyaz Murshed <Niyaz.Murshed at arm.com>, nd <nd at arm.com>
Subject: [mpich-discuss] Mpich over RDMA sample
Hello, I am trying to learn about MPICH and its performance over RDMA. I am using libfabric and installed mpich using the below configure. ./configure --prefix=/opt/mpich/ --with-ofi=/opt/libfabric/ When I run any applications between 2 directly
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Hello,
I am trying to learn about MPICH and its performance over RDMA.
I am using libfabric and installed mpich using the below configure.
./configure --prefix=/opt/mpich/ --with-ofi=/opt/libfabric/
When I run any applications between 2 directly connected servers having Mellanox NICs, I see that communication is happening over tcp and not over RoCE.
Is there any way to test commination over RoCE ?
For eg. I was able to test it for libfabric using the below sample that comes along with libfabric to test RMA.
Is there something similar for MPICH ? or use the current sample to use RoCE by some parameter?
Server :
fi_rma_bw -s 192.168.1.100 -e msg -d mlx5_1 -S 1024 -I 1
Client :
fi_rma_bw -s 192.168.1.200 -e msg -d mlx5_3 192.168.1.100 -S 1024 -I 1
Regards,
Niyaz
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