Product specifications

4–InfiniPath Cluster Setup and Administration
Memory Footprint
IB6054601-00 H 4-3
A
The InfiniPath driver modules in this release are installed in:
/lib/modules/$(uname -r)/updates/kernel/drivers/infiniband/hw/ipath
Most of the other OFED modules are installed under the infiniband
subdirectory. Other modules are installed under:
/lib/modules/$(uname -r)/updates/kernel/drivers/net
The RDS modules are installed under:
/lib/modules/$(uname -r)/updates/kernel/net/rds
QLogic-supplied OpenMPI and MVAPICH RPMs with PSM support and compiled
with GCC, PathScale, PGI, and the Intel compilers are now installed in directories
using this format:
/usr/mpi/<compiler>/<mpi>-<mpi_version>-qlc
For example:
/usr/mpi/gcc/openmpi-1.2.8-qlc
Memory Footprint
This section contains a preliminary guideline for estimating the memory footprint
of the QLogic adapter on Linux x86_64 systems. Memory consumption is linear,
based on system configuration. OpenFabrics support is under development and
has not been fully characterized. Table 4-1 summarizes the guidelines.
Table 4-1. Memory Footprint of the QLogic Adapter on Linux x86_64
Systems
Adapter
Component
Required/
Optional
Memory Footprint Comment
InfiniPath
driver
Required 9 MB Includes accelerated IP
support. Includes table
space to support up to 1000
node systems. Clusters
larger than 1000 nodes can
also be configured.
MPI Optional 68 MB per process + 264
bytes × num_remote_procs:
68 MB = 60 MB (base) + 512
× 2172 (sendbufs) +
1024×1K (misc allocations) +
6 MB (shared memory)
Several of these parame-
ters (sendbufs, recvbufs
and size of the shared
memory region) are tun-
able if you want a reduced
memory footprint.