Q-Logic IB6054601-00 D Benutzerhandbuch

2 – InfiniPath Cluster Administration
Performance and Management Tips

2-20

IB6054601-00 D

Q

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.

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

Run these tools to gather information before reporting problems and 
requesting support.

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.

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