Re: [PATCH 2/2] infiniband-diags: add dump_fts tool

On 2/2/2013 7:36 PM, Ira Weiny wrote:

quoted

From 2708d0965e03de1f9ae722e38c8b72a808718a0d Mon Sep 17 00:00:00 2001

From: Ira Weiny <redacted>
Date: Fri, 1 Feb 2013 18:13:59 -0500
Subject: [PATCH 2/2] infiniband-diags: add dump_fts tool

dump_fts adds a faster version of the functionality of dump_[l|m]fts.sh.  This
code is based off of the ibroute code and simply uses libibnetdisc to scan the
fabric instead of using ibnetdiscover and letting ibroute requery all that data
over again.  This improves things in 3 ways.

1) performance improves by nearly 2 orders of magnitude.
2) this version greatly reduces the mads required and thus reduces the
   impact on the fabric.
3) Everything is queried with DR paths which ensures if the routing tables are
   bad on the cluster the query will still complete and give you the
   information you were looking for.  (To be fair dump_lft.sh has the DR option
   but it is currently buggy.)

Sweet ;-)

Example runs on the ~1400 nodes of the Hyperion test cluster show:

13:45:46 > time ./dump_lfts.sh > /dev/null

real    4m58.175s
user    0m6.407s
sys     0m17.983s

13:53:12 > time ./dump_fts > /dev/null
dump tables: linear forwarding table get failed

It would be helpful to print node name, guid, and/or LID such failures.

Also, in this specific case, any idea why get LFT failed ?

-- Hal

real    0m8.121s
user    0m3.032s
sys     0m3.342s

Signed-off-by: Ira Weiny <redacted>

<snip...>
--
To unsubscribe from this list: send the line "unsubscribe linux-rdma" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html