HP XC System Software Release Notes for Version 2.1

have been updated as nodes are booted or shut down. It is possible for the mapper
to be correctly set and the map version to be incorrect, so check both.
There is one mapper per port, so there will be two lines of output for Myrinet XP
and four lines of output for Myrinet 2XP.
This problem is caused by a node that has either crashed or hung or has become
unresponsive in some way but is still powered on. To correct this problem, reboot
the unresponsive node.
12.3 QsNet
II
Interconnect
The following release notes are specific to the QsNet
II
interconnect.
12.3.1 ELAN4 Diagnostic Tools Fail on Systems With ELAN3 Interconnect
This release note applies only to systems with an ELAN3 interconnect.
The /opt/hptc/etc/gconfig.d/C30swmlogger gconfigure script, which is run
by the cluster_config utility, fails on an ELAN3 system because the swmlogger
service and the qsnet diagnostic database are supported only on ELAN4 systems.
On ELAN3 systems, enter the following commands on the head node to stop the
swmlogger service from running and to disable the swmlogger service from
starting at boot time. You must run these two commands any time you rerun
the cluster_config utility:
# service swm stop
# chkconfig --del swm
12.3.2 OVP Interconnect Tests Fail on ELAN3
This release note applies only to systems using the ELAN3 interconnect.
The operation verification procedure (OVP) interconnect tests are valid for ELAN4
only and will fail on an ELAN3 system with the following errors; these errors
are benign and can be safely ignored:
Verify interconnect:
Testing quadrics/qsnet_database ...
--- FAILED ---
Testing quadrics/swmlogger ...
+++ PASSED +++
Testing quadrics/network ...
--- FAILED ---
12.3.3 Possible Conflict with Use of SIGUSR2
The Quadrics QsNet
II
software internally uses SIGUSR2 to manage the
interconnect. This can conflict with any user applications that use SIGUSR2,
including for debugger use.
To work around this conflict, set the environment variable LIBELAN4_TRAPSIG for
the application to a different signal number other than the default value 12 that
corresponds to SIGUSR2. Doing this instructs the Quadrics software to use the new
signal number, and SIGUSR2 can be once again used by the application. Signal
numbers are define in the /usr/include/asm/signal.h file.
12-2 Interconnect Notes