Hi,
This problem can be caused by a variety of things, but I suspect our default
queue pair parameters (QP) aren't helping the
situation :-).
What happens when you add the following to your mpirun command?
-mca btl_openib_receive_queues S,4096,128:S,12288,128:S,65536,12
OMPI Developers:
Maybe we should consider disabling the use of per-peer queue pairs by default.
Do they buy us anything? For what it is
worth, we have stopped using them on all of our large systems here at LANL.
Thanks,
Samuel K. Gutierrez
Los Alamos National Laboratory
On Sep 12, 2011, at 9:23 AM, Blosch, Edwin L wrote:
I am getting this error message below and I don’t know what it means or
how to fix it. It only happens when I
run on a large number of processes, e.g. 960. Things work fine on 480,
and I don’t think the application has a
bug. Any help is appreciated…
[c1n01][[30697,1],3][connect/btl_openib_connect_oob.c:464:qp_create_one] error
creating qp errno says Cannot allocate
memory
[c1n01][[30697,1],4][connect/btl_openib_connect_oob.c:464:qp_create_one] error
creating qp errno says Cannot allocate
memory
Here’s the mpirun command I used:
mpirun --prefix /usr/mpi/intel/openmpi-1.4.3 --machinefile <host file> -np 960
--mca btl ^tcp --mca
mpool_base_use_mem_hooks 1 --mca mpi_leave_pinned 1 -x LD_LIBRARY_PATH -x
MPI_ENVIRONMENT=1 <application name +
arguments>
Here’s the applicable hardware from the
/usr/mpi/intel/openmpi-1.4.3/share/openmpi/mca-btl-openib-device-params.ini
file:
# A.k.a. ConnectX
[Mellanox Hermon]
vendor_id = 0x2c9,0x5ad,0x66a,0x8f1,0x1708,0x03ba,0x15b3,0x119f
vendor_part_id =
25408,25418,25428,26418,26428,25448,26438,26448,26468,26478,26488
use_eager_rdma = 1
mtu = 2048
max_inline_data = 128
And this is the output of ompi_info –param btl openib:
MCA btl: parameter "btl_base_verbose" (current value: "0",
data source: default value)
Verbosity level of the BTL framework
MCA btl: parameter "btl" (current value: <none>, data source:
default value)
Default selection set of components for the btl framework
(<none> means use all components
that can be found)
MCA btl: parameter "btl_openib_verbose" (current value: "0",
data source: default value)
Output some verbose OpenIB BTL information (0 = no
output, nonzero = output)
MCA btl: parameter "btl_openib_warn_no_device_params_found" (current
value: "1", data source: default
value, synonyms:
btl_openib_warn_no_hca_params_found)
Warn when no device-specific parameters are found in
the INI file specified by the
btl_openib_device_param_files MCA
parameter (0 = do not warn; any other value = warn)
MCA btl: parameter "btl_openib_warn_no_hca_params_found" (current value:
"1", data source: default
value, deprecated, synonym
of: btl_openib_warn_no_device_params_found)
Warn when no device-specific parameters are found in
the INI file specified by the
btl_openib_device_param_files MCA
parameter (0 = do not warn; any other value = warn)
MCA btl: parameter "btl_openib_warn_default_gid_prefix" (current value:
"1", data source: default
value)
Warn when there is more than one active ports and at
least one of them connected to the
network with only default GID
prefix configured (0 = do not warn; any other value =
warn)
MCA btl: parameter "btl_openib_warn_nonexistent_if" (current value:
"1", data source: default value)
Warn if non-existent devices and/or ports are
specified in the btl_openib_if_[in|ex]clude MCA
parameters (0 = do not
warn; any other value = warn)
MCA btl: parameter "btl_openib_want_fork_support" (current value:
"-1", data source: default value)
Whether fork support is desired or not (negative =
try to enable fork support, but continue
even if it is not
available, 0 = do not enable fork support, positive =
try to enable fork support and fail if
it is not available)
MCA btl: parameter "btl_openib_device_param_files" (current
value:
"/usr/mpi/intel/openmpi-1.4.3/share/openmpi/mca-btl-openib-device-params.ini",
data source:
default value, synonyms:
btl_openib_hca_param_files)
Colon-delimited list of INI-style files that contain
device vendor/part-specific parameters
MCA btl: parameter "btl_openib_hca_param_files" (current value:
"/usr/mpi/intel/openmpi-1.4.3/share/openmpi/mca-btl-openib-device-params.ini",
data source:
default value, deprecated,
synonym of: btl_openib_device_param_files)
Colon-delimited list of INI-style files that contain
device vendor/part-specific parameters
MCA btl: parameter "btl_openib_device_type" (current value:
"all", data source: default value)
Specify to only use IB or iWARP network adapters
(infiniband = only use InfiniBand HCAs; iwarp
= only use iWARP NICs;
all = use any available adapters)
MCA btl: parameter "btl_openib_max_btls" (current value: "-1",
data source: default value)
Maximum number of device ports to use (-1 = use all
available, otherwise must be >= 1)
MCA btl: parameter "btl_openib_free_list_num" (current value:
"8", data source: default value)
Intial size of free lists (must be >= 1)
MCA btl: parameter "btl_openib_free_list_max" (current value:
"-1", data source: default value)
Maximum size of free lists (-1 = infinite, otherwise
must be >= 0)
MCA btl: parameter "btl_openib_free_list_inc" (current value:
"32", data source: default value)
Increment size of free lists (must be >= 1)
MCA btl: parameter "btl_openib_mpool" (current value: "rdma",
data source: default value)
Name of the memory pool to be used (it is unlikely
that you will ever want to change this
MCA btl: parameter "btl_openib_reg_mru_len" (current value:
"16", data source: default value)
Length of the registration cache most recently used list
(must be >= 1)
MCA btl: parameter "btl_openib_cq_size" (current value:
"1000", data source: default value, synonyms:
btl_openib_ib_cq_size)
Size of the OpenFabrics completion queue (will
automatically be set to a minimum of (2 *
number_of_peers *
btl_openib_rd_num))
MCA btl: parameter "btl_openib_ib_cq_size" (current value:
"1000", data source: default value,
deprecated, synonym of:
btl_openib_cq_size)
Size of the OpenFabrics completion queue (will
automatically be set to a minimum of (2 *
number_of_peers *
btl_openib_rd_num))
MCA btl: parameter "btl_openib_max_inline_data" (current value:
"-1", data source: default value,
synonyms:
btl_openib_ib_max_inline_data)
Maximum size of inline data segment (-1 = run-time
probe to discover max value, otherwise must
be >= 0). If not
explicitly set, use max_inline_data from the INI file
containing device-specific parameters
MCA btl: parameter "btl_openib_ib_max_inline_data" (current value:
"-1", data source: default value,
deprecated, synonym of:
btl_openib_max_inline_data)
Maximum size of inline data segment (-1 = run-time
probe to discover max value, otherwise must
be >= 0). If not
explicitly set, use max_inline_data from the INI file
containing device-specific parameters
MCA btl: parameter "btl_openib_pkey" (current value: "0", data
source: default value, synonyms:
btl_openib_ib_pkey_val)
OpenFabrics partition key (pkey) value. Unsigned
integer decimal or hex values are allowed
(e.g., "3" or "0x3f") and
will be masked against the maximum allowable IB
paritition key value (0x7fff)
MCA btl: parameter "btl_openib_ib_pkey_val" (current value:
"0", data source: default value,
deprecated, synonym of:
btl_openib_pkey)
OpenFabrics partition key (pkey) value. Unsigned
integer decimal or hex values are allowed
(e.g., "3" or "0x3f") and
will be masked against the maximum allowable IB
paritition key value (0x7fff)
MCA btl: parameter "btl_openib_psn" (current value: "0", data
source: default value, synonyms:
btl_openib_ib_psn)
OpenFabrics packet sequence starting number (must be
>= 0)
MCA btl: parameter "btl_openib_ib_psn" (current value: "0",
data source: default value, deprecated,
synonym of:
btl_openib_psn)
OpenFabrics packet sequence starting number (must be
>= 0)
MCA btl: parameter "btl_openib_ib_qp_ous_rd_atom" (current value:
"4", data source: default value)
InfiniBand outstanding atomic reads (must be >= 0)
MCA btl: parameter "btl_openib_mtu" (current value: "3", data
source: default value, synonyms:
btl_openib_ib_mtu)
OpenFabrics MTU, in bytes (if not specified in INI
files). Valid values are: 1=256 bytes,
2=512 bytes, 3=1024 bytes,
4=2048 bytes, 5=4096 bytes
MCA btl: parameter "btl_openib_ib_mtu" (current value: "3",
data source: default value, deprecated,
synonym of:
btl_openib_mtu)
OpenFabrics MTU, in bytes (if not specified in INI
files). Valid values are: 1=256 bytes,
2=512 bytes, 3=1024 bytes,
4=2048 bytes, 5=4096 bytes
MCA btl: parameter "btl_openib_ib_min_rnr_timer" (current value:
"25", data source: default value)
InfiniBand minimum "receiver not ready" timer, in seconds
(must be >= 0 and <= 31)
MCA btl: parameter "btl_openib_ib_timeout" (current value:
"20", data source: default value)
InfiniBand transmit timeout, plugged into formula:
4.096 microseconds *
(2^btl_openib_ib_timeout)(must be >= 0 and <=
31)
MCA btl: parameter "btl_openib_ib_retry_count" (current value:
"7", data source: default value)
InfiniBand transmit retry count (must be >= 0 and <=
7)
MCA btl: parameter "btl_openib_ib_rnr_retry" (current value:
"7", data source: default value)
InfiniBand "receiver not ready" retry count; applies
*only* to SRQ/XRC queues. PP queues use
RNR retry values of 0
because Open MPI performs software flow control to
guarantee that RNRs never occur (must be >=
0 and <= 7; 7 =
"infinite")
MCA btl: parameter "btl_openib_ib_max_rdma_dst_ops" (current value:
"4", data source: default value)
InfiniBand maximum pending RDMA destination operations
(must be >= 0)
MCA btl: parameter "btl_openib_ib_service_level" (current value:
"0", data source: default value)
InfiniBand service level (must be >= 0 and <= 15)
MCA btl: parameter "btl_openib_use_eager_rdma" (current value:
"-1", data source: default value)
Use RDMA for eager messages (-1 = use device default,
0 = do not use eager RDMA, 1 = use eager
RDMA)
MCA btl: parameter "btl_openib_eager_rdma_threshold" (current value:
"16", data source: default value)
Use RDMA for short messages after this number of
messages are received from a given peer (must
be >= 1)
MCA btl: parameter "btl_openib_max_eager_rdma" (current value:
"16", data source: default value)
Maximum number of peers allowed to use RDMA for short
messages (RDMA is used for all long
messages, except if
explicitly disabled, such as with the "dr" pml) (must be
>= 0)
MCA btl: parameter "btl_openib_eager_rdma_num" (current value:
"16", data source: default value)
Number of RDMA buffers to allocate for small
messages(must be >= 1)
MCA btl: parameter "btl_openib_btls_per_lid" (current value:
"1", data source: default value)
Number of BTLs to create for each InfiniBand LID (must
be >= 1)
MCA btl: parameter "btl_openib_max_lmc" (current value: "0",
data source: default value)
Maximum number of LIDs to use for each device port (must
be >= 0, where 0 = use all available)
MCA btl: parameter "btl_openib_enable_apm_over_lmc" (current value:
"0", data source: default value)
Maximum number of alterative paths for each device port
(must be >= -1, where 0 = disable apm,
-1 = all availible
alternative paths )
MCA btl: parameter "btl_openib_enable_apm_over_ports" (current value:
"0", data source: default value)
Enable alterative path migration (APM) over different
ports of the same device (must be >= 0,
where 0 = disable APM
over ports , 1 = enable APM over ports of the same
device)
MCA btl: parameter "btl_openib_use_async_event_thread" (current value:
"1", data source: default value)
If nonzero, use the thread that will handle
InfiniBand asyncihronous events
MCA btl: parameter "btl_openib_buffer_alignment" (current value:
"64", data source: default value)
Prefered communication buffer alignment, in bytes (must
be > 0 and power of two)
MCA btl: parameter "btl_openib_use_message_coalescing" (current value:
"1", data source: default value)
Use message coalescing
MCA btl: parameter "btl_openib_cq_poll_ratio" (current value:
"100", data source: default value)
how often poll high priority CQ versus low priority CQ
MCA btl: parameter "btl_openib_eager_rdma_poll_ratio" (current value:
"100", data source: default
value)
how often poll eager RDMA channel versus CQ
MCA btl: parameter "btl_openib_hp_cq_poll_per_progress" (current value:
"10", data source: default
value)
max number of completion events to process for each
call of BTL progress engine
MCA btl: information "btl_openib_have_fork_support" (value:
"1", data source: default value)
Whether the OpenFabrics stack supports applications that invoke
the "fork()" system call or
not (0 = no, 1 = yes).
Note that this value does NOT indicate whether the system being
run on supports "fork()" with
OpenFabrics applications
or not.
MCA btl: parameter "btl_openib_exclusivity" (current value:
"1024", data source: default value)
BTL exclusivity (must be >= 0)
MCA btl: parameter "btl_openib_flags" (current value: "310",
data source: default value)
BTL bit flags (general flags: SEND=1, PUT=2, GET=4,
SEND_INPLACE=8, RDMA_MATCHED=64,
HETEROGENEOUS_RDMA=256; flags
only used by the "dr" PML (ignored by others):
ACK=16, CHECKSUM=32, RDMA_COMPLETION=128)
MCA btl: parameter "btl_openib_rndv_eager_limit" (current value:
"12288", data source: default value)
Size (in bytes) of "phase 1" fragment sent for all large
messages (must be >= 0 and <=
eager_limit)
MCA btl: parameter "btl_openib_eager_limit" (current value:
"12288", data source: default value)
Maximum size (in bytes) of "short" messages (must be
>= 1).
MCA btl: parameter "btl_openib_max_send_size" (current value:
"65536", data source: default value)
Maximum size (in bytes) of a single "phase 2"
fragment of a long message when using the
pipeline protocol (must be >=
1)
MCA btl: parameter "btl_openib_rdma_pipeline_send_length" (current
value: "1048576", data source:
default value)
Length of the "phase 2" portion of a large message
(in bytes) when using the pipeline
protocol. This part of the
message will be split into fragments of size
max_send_size and sent using send/receive
semantics (must be >= 0; only
relevant when the PUT flag is set)
MCA btl: parameter "btl_openib_rdma_pipeline_frag_size" (current value:
"1048576", data source: default
value)
Maximum size (in bytes) of a single "phase 3"
fragment from a long message when using the
pipeline protocol. These
fragments will be sent using RDMA semantics (must be
>= 1; only relevant when the PUT flag is
set)
MCA btl: parameter "btl_openib_min_rdma_pipeline_size" (current value:
"262144", data source: default
value)
Messages smaller than this size (in bytes) will not
use the RDMA pipeline protocol. Instead,
they will be split into
fragments of max_send_size and sent using send/receive
semantics (must be >=0, and is
automatically adjusted up to at
least (eager_limit+btl_rdma_pipeline_send_length);
only relevant when the PUT flag is set)
MCA btl: parameter "btl_openib_bandwidth" (current value:
"800", data source: default value)
Approximate maximum bandwidth of interconnect(must be
>= 1)
MCA btl: parameter "btl_openib_latency" (current value: "10",
data source: default value)
Approximate latency of interconnect (must be >= 0)
MCA btl: parameter "btl_openib_receive_queues" (current value:
"P,128,256,192,128:S,2048,256,128,32:S,12288,256,128,32:S,65536,256,128,32",
data source:
default value)
Colon-delimited, comma delimited list of receive
queues: P,4096,8,6,4:P,32768,8,6,4
MCA btl: parameter "btl_openib_if_include" (current value:
<none>, data source: default value)
Comma-delimited list of devices/ports to be used (e.g.
"mthca0,mthca1:2"; empty value means to
use all ports found).
Mutually exclusive with btl_openib_if_exclude.
MCA btl: parameter "btl_openib_if_exclude" (current value:
<none>, data source: default value)
Comma-delimited list of device/ports to be excluded
(empty value means to not exclude any
ports). Mutually exclusive
with btl_openib_if_include.
MCA btl: parameter "btl_openib_ipaddr_include" (current value:
<none>, data source: default value)
Comma-delimited list of IP Addresses to be used (e.g.
"192.168.1.0/24"). Mutually exclusive
with
btl_openib_ipaddr_exclude.
MCA btl: parameter "btl_openib_ipaddr_exclude" (current value:
<none>, data source: default value)
Comma-delimited list of IP Addresses to be excluded (e.g.
"192.168.1.0/24"). Mutually
exclusive with
btl_openib_ipaddr_include.
MCA btl: parameter "btl_openib_cpc_include" (current value:
<none>, data source: default value)
Method used to select OpenFabrics connections (valid
values: oob,xoob,rdmacm)
MCA btl: parameter "btl_openib_cpc_exclude" (current value:
<none>, data source: default value)
Method used to exclude OpenFabrics connections (valid
values: oob,xoob,rdmacm)
MCA btl: parameter "btl_openib_connect_oob_priority" (current value:
"50", data source: default value)
The selection method priority for oob
MCA btl: parameter "btl_openib_connect_xoob_priority" (current value:
"60", data source: default value)
The selection method priority for xoob
MCA btl: parameter "btl_openib_connect_rdmacm_priority" (current value:
"30", data source: default
value)
The selection method priority for rdma_cm
MCA btl: parameter "btl_openib_connect_rdmacm_port" (current value:
"0", data source: default value)
The selection method port for rdma_cm
MCA btl: parameter "btl_openib_connect_rdmacm_resolve_timeout" (current
value: "1000", data source:
default value)
The timeout (in miliseconds) for address and route
resolution
MCA btl: parameter "btl_openib_connect_rdmacm_retry_count" (current
value: "20", data source: default
value)
Maximum number of times rdmacm will retry route
resolution
MCA btl: parameter
"btl_openib_connect_rdmacm_reject_causes_connect_error" (current value: "0",
data
source: default value)
The drivers for some devices are buggy such that an
RDMA REJECT action may result in a
CONNECT_ERROR event instead of
a REJECTED event. Setting this MCA parameter to true
tells Open MPI to treat CONNECT_ERROR
events on connections
where a REJECT is expected as a REJECT (default:
false)
MCA btl: parameter "btl_openib_priority" (current value: "0",
data source: default value)
MCA btl: parameter "btl_base_warn_component_unused" (current value:
"1", data source: default value)
This parameter is used to turn on warning messages
when certain NICs are not used
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