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2 – InfiniPath Cluster Administration
Performance and Management Tips
2-20 IB6054601-00 D
Q
2.10.6
Hyper-Threading
If using Intel processors that support Hyper-Threading, it is recommended that
HyperThreading is turned off in the BIOS. This will provide more consistent
performance. You can check and adjust this setting using the BIOS Setup Utility.
For specific instructions on how to do this, follow the hardware documentation that
came with your system.
2.10.7
Homogeneous Nodes
To minimize management problems, the compute nodes of the cluster should have
very similar hardware configurations and identical software installations. A
mismatch between the InfiniPath software versions may also cause problems. Old
and new libraries should not be run within the same job. It may also be useful to
distinguish between the InfiniPath-specific drivers and those that are associated
with kernel.org, OpenFabrics, or are distribution-built. The most useful tools are:
ipathbug-helper
ipath_control
rpm
mpirun
ident
strings
ipath_checkout
NOTE: Run these tools to gather information before reporting problems and
requesting support.
ipathbug_helper
The InfiniPath software includes a shell script ipathbug-helper, which can gather
status and history information for use in analyzing InfiniPath problems. This tool is
also useful for verifying homogeneity. It is best to run
ipathbug-helper with root
privilege, since some of the queries require it. There is also a
--verbose option
which greatly increases the amount of gathered information. Simply run it on several
nodes and examine the output for differences.
ipath_control
Run the shell script ipath_control as follows:
% ipath_control -i
$Id: QLogic Release2.0 $ $Date: 2006-09-15-04:16 $
00: Version: Driver 2.0, InfiniPath_QHT7140, InfiniPath1 3.2, PCI
2, SW Compat 2
00: Status: 0xe1 Initted Present IB_link_up IB_configured