Installation guide

QLogic OFED+ Host Software Page 12 of 14
 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}'
 If a non-blank output occurs, then debuginfo is enabled. If a blank line is output, then
debuginfo is disabled on the present system.
 When running QLogic SRP over two ports in round robin mode, performance is
degraded.
 When running verbs-based benchmarks such as ib_send_bw, the following message may
appear:
BUG: soft lockup - CPU#1 stuck for 10s.
This message does not impact completion or correctness of the benchmark.
 The ib_send_bw benchmark, when run in UC mode, is written such that it will hang if
even one packet is dropped.
 The QLogic 12000 series switch firmware must be at version 6.0.0.1.2 or later to
connect with the TrueScale Host Channel Adapters in this release.
 QLE7240/QLE7280 performance with Barcelona stepping B2 and the BIOS/kernel
workaround for AMD errata 298 can lead to reduced InfiniBand bandwidth, as a result of
poor memory bandwidth and latency on the adapters due to the workaround. To fix this
problem, upgrade to Barcelona stepping B3 (or later).
 mpirun-debug option fails to open xterm windows. A race condition may occur when
there are multiple processes trying to lock the $HOME/.Xauthority file concurrently. An
error similar to this may occur:
/usr/X11R6/bin/xauth: error in locking authority file
/home/<user>/.Xauthority
Disable X11 forwarding by setting the environment variable $MPI_SHELL_X='ssh -x'.
Then set the DISPLAY environment variable with the mpirun -display option. For
example:
env MPI_SHELL_X='ssh -x' mpirun -debug -display\
<X11_display_hostname:display_number.screen_number> [...] (continued on
same line)