config root man

This README is for OpenSM and the InfiniBand diagnostic utilities
in this directory (management).

The master source repository is
git://git.openfabrics.org/~sashak/management.git and can be cloned by:

  git clone git://git.openfabrics.org/~sashak/management.git


Packages
--------
libibcommon - common stuff
libibumad - interface to ib_umad module (user_mad) library
libibmad - generic MAD handling library
opensm - OpenSM
infiniband-diags - various diagnostic tools


Building
--------
To make this unpack tarballs and in directories libibcommon, libibumad,
libibmad, opensm, infiniband-diags (in that order) run:

  ./configure && make && make install

(If you are building the cloned repository run also ./autogen.sh first)

Typically the autogen and configure steps only need be done the first
time unless configure.in or Makefile.am changes in the directories.

Libraries are installed by default at /usr/local/lib and binaries at
/usr/local/sbin.


Running
-------
After compiling and installing, you can run opensm by invoking

  /usr/local/sbin/opensm

opensm must be run as root. Run 'opensm --help' to see the options.

Note also that you must have udev mount /dev/infiniband or do it manually.
See .../src/linux-kernel/docs/user_mad.txt. Also, ib_umad module must be
loaded.

opensm will run on the first existing port on the first IB device (HCA).
You can override that by using "-g <portguid_in_hex>".
Verify that the first port is active. This assumes the port is plugged
into another IB device.

In case of problems, run the opensm with -V and send the log file
(/var/log/opensm.log).

IMPORTANT:
Don't forget to modprobe ib_umad and make sure udev is configured before
using any of the userspace programs.


OpenSM Limitations:
1. Retry mechanism in SM is primitive and needs enhancing to deal with
ports which are active but don't respond to SM MADs.
2. Async events are not yet supported (by OpenSM). The only one supported
is local LID change (and this is handled in the mthca driver). Future
versions of OpenSM may need to act on more local events.


Tuning OpenSM for Large Clusters
--------------------------------
Currently OpenSM is compiled with debug and no optimization. This
should be changed to at least -O2 (and perhaps -O4) but I would start
with -O2. This results in a 2x speedup for some code paths.

OpenSM supports a pipelining mode for SMPs. The default is 4
outstanding SMPs. -maxsmps <#> indicates the number of outstanding SMPs
allowed and should speed up the initialization. Useful values of this
are 16 and 32.

Beyond this, there may be some issue with a link which is causing
timeout and retries to kick in. The OpenSM log should have some messages
in there indicating this.


Other utilities (infiniband diagnostics)
---------------------------------------
ibstat - show host adapters status
ibstatus - similar to ibstat but implemented as a script
ibnetdiscover - scan topology
ibaddr - shows the lid range and default GID of the target (default is
	the local port)
ibroute - display unicast and multicast forwarding tables of switches
ibtracert - display unicast or multicast route from source to destination
ibping - ping/pong between IB nodes (currently using vendor MADs)
ibsysstat - obtain basic information for node (hostname, cpus, memory,
	utilization) which may be remote
sminfo - query the SMInfo attribute on a node
smpdump - simple solicited SMP query tool. Output is hex dump
	(unless requested otherwise, e.g. using -s)
smpquery - formatted SMP query tool
perfquery - dump (and optionally clear) the performance (including error)
	counters of the destination port
ibcheckport - perform some basic tests on the specified port
ibchecknode - perform some basic tests on the specified node
ibcheckerrs - check if the error counters of the port/node have passed
	some predefined thresholds
ibchecknet - perform port/node/errors check on the subnet. ibnetdiscover
	output can be used as in input topology
ibswitches - scan the net or use existing net topology file and list all
	switches
ibhosts - scan the net or use existing net topology file and list all hosts
ibnodes - scan the net or use existing net topology file and list all nodes
ibportstate - get the logical and physical port state of an IB port or
	disable or enable the port (only on a switch)
ibcheckwidth - perform port width check on the subnet. Used to find ports
	with 1x link width.
ibcheckportwidth - perform 1x port width check on specified port
ibcheckstate - perform port state (and physical port state) check on
	the subnet. Used to find ports not in LinkUp physical port state
	and not Active port state
ibcheckportstate - perform port state (and physical port state) check on
	specified port
ibcheckerrors - perform error check on subnet. Used to find ports with
	error counters (PMA PortCounters) beyond the indicated thresholds
ibclearerrors - clear all error counters on subnet
ibclearcounters - clear all port counters on subnet
ibdiscover.pl - takes output of ibnetdiscover and a map file and produces
	a topology file (local node GUID and port connected to remote
	node GUID and port)
saquery - issue some SA queries

Note that the above list is not up to date and the infiniband-diags
subdirectory should be checked for the latest tools.