Troubleshooting guide

The yellow "Lanai" LED is controlled by the Lanai processor, and will pulse like a

heartbeat while the MCP/firmware is running. If an error occurs, the yellow "Lanai"

LED will pulse an S.O.S signal. If the yellow LED is not pulsing, the MX-2G MCP is

not loaded or is not running.

Refer to the FAQ entry "How can I tell if the MX Mapper has correctly detected all of the

hosts in my Myrinet network?" (http://www.myri.com/cgi-bin/fom?file=427).

If you have tried all of these procedures and you cannot resolve the problem, contact

help@myri.com for assistance. You cannot continue with the software installation until

this issue is resolved.

Further Details

The make install script copies the MX binaries to the specified binary installation

directory <install_path>.

The mx_local_install script performs the following operations:

• Copies other files from the binary installation directory to an architecture-

specific directory (/etc/init.d/).

• Creates the devices (/dev/mx* and /dev/mxp*), one device per NIC

• Creates the mapper’s per-host configuration directory (/var/run/fms/) and

possibly stores configuration files there.

The mx_start_stop “start” script performs the following operations:

• Stops any Ethernet-over-Myrinet devices (myri*)

• Unloads any currently loaded MX or GM driver (using rmmod)

• Loads the MX mcp and driver modules (using insmod)

• Starts a mapper daemon called mx_mapper for each Myrinet NIC contained in

the machine. The PIDs of the running mx_mappers are stored in

/var/run/mx_mapper/pid.{board_id}, and the map files are stored in

/var/run/mx_mapper/map.{board_id}.

Important note: The MX start script does not configure the IP device. If you wish to

run IP over MX/Myrinet (ethernet emulation), you must configure the device. (Refer to

Step 3 of the installation process.)

If you wish to have the driver auto-load at boot, you must create appropriate links in the

/etc/rcN directories to the /etc/init.d/mx script, or, for example, use the following

command (for Debian Linux):

update-rc.d mx defaults