[ofw] How many QPs are used so far?

[Tang, Changqing]

Tzachi,

               Thanks  for your quick response. Our system is Linux, how do I do it?



               Also when ibv_create_qp() fails, is there a way to figure out what the reason is (QP limit reached, unable to lock memory, others)? Does errno tell us anything?



--CQ



From: Tzachi Dar [mailto:tzachid at mellanox.co.il]
Sent: Monday, September 13, 2010 10:01 AM
To: Tang, Changqing; ofw at lists.openfabrics.org
Subject: RE: How many QPs are used so far?



Hi,



The number of allowed qps is controlled in the registry.



Before we try to debug your system, I would like to try and change that number and see if this will solve your problem.



Can you go to the registry to the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\mlx4_bus\Parameters and increase the key that is called LogNumQp?



Please stop and start the mlx4_bus from the device manager and repeat your experiment.



Thanks

Tzachi



From: ofw-bounces at lists.openfabrics.org [mailto:ofw-bounces at lists.openfabrics.org] On Behalf Of Tang, Changqing
Sent: Monday, September 13, 2010 4:27 PM
To: ofw at lists.openfabrics.org
Subject: [ofw] How many QPs are used so far?



HI,

               Our application sometimes report ibv_create_qp() error. Our system has 69G memory and set lockable memory to unlimited. So I wonder running out of QP number is more suspicious than running out of memory.

               Is there a way to query how many QPs are used at the point of ibv_create_qp() failure ?



               Thank you in advance.



--CQ

Hewlett-Packard BIS

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