[openib-general] [libibcm] does the libibcm support multithreaded applications?

[Sean Hefty]

Dotan Barak wrote:
> I have a multithreaded test (qp_test) and i tried to add support to the
> libibcm: every thread is calling the ib_cm_get_device function and get a
> cm_device_handle. I checked the handles and it seems that both of the threads
> get the same CM device handle, thing which causes to thread X sometimes get
> the event which i wanted to send to thread Y.

This is correct based on the current implementation.  The library opens the CM 
files once.

> How should a multithreaded application need to work with the libibcm?

I understand what the problem is, and I think you're right.  If 
ib_cm_get_device() returned a new ib_cm_device, you could more easily control 
event processing.  I will fix this up when I remove the dependency on libsysfs 
from the libibcm.  I am probably at least 2 weeks away from starting on this though.

- Sean