Product specifications

QLogic OFED+ Host Software Page 17 of 20
At the time of this release, Oracle has not certified InfiniBand adapters for RDS. As a
result, QLogic is unable to extend support for RDS at this time.
At the time of this release, the PathScale Compiler Suite is not supported for
SLES11. As a result, QLogic is unable to extend support for this environment.
The 10m Amphenol Cables have exhibited inconsistent reliability and are not
recommended for use with TrueScale InfiniBand Adapters.
5.9 Other Information
The recommended tuning for nodes with dual six-core Intel Xeon 5600 Series
(Westmere) processors is to configure the Truescale Host Channel Adapters for 14
contexts, for improved message rate and small message performance. The cfgctxts
driver parameter can be specified in the /etc/modprobe.conf file to configure the
contexts appropriately. For example, add the following line to modprobe.conf:
options ib_qib pcie_caps=0x51 cfgctxts=14
Note that the current release of mvapich2 may have a memory management issue
on certain machines and certain MPI applications. If MPI applications hang when
using MVAPICH2, try using these settings with your application:
MV2_IBA_EAGER_THRESHOLD=16384 MV2_VBUF_TOTAL_SIZE=16384
When using QLogic's sample applications, these settings can be passed using the
ofed.mvapich2.params file (in /opt/iba/src/mpi_apps folder). For other
applications, they can be passed as part of the mpirun command.
When running MVAPICH2, QLogic recommends turning off RDMA fast path. To turn
off RDMA fast path, specify MV2_USE_RDMA_FAST_PATH=0 in the mpirun_rsh
command line or set this option in the parameter file for mvapich2.
Older QLogic InfiniPath 2.2.1 and prior releases will not be recognized in the
installation menus and will be treated as if no InfiniBand software is installed.
When upgrading from an older QLogic OFED+ release to a new QLogic OFED+, the
older QLogic OFED+ release will be uninstalled first.
When installing the OFED Debug Info component, make sure that ~/.rpmmacros
does not have any lines changing the %debug_package macro.
If %debug_package is set to %{nil}, debuginfo RPMs will not be available for
installation.
The current setting for this parameter can be verified using:
rpm --eval '%{debug_package}'