[openib-general] Re: unable to run ibv_uc_pingpong and other example binaries

[Hal Rosenstock]

On Tue, 2005-07-19 at 12:49, Michael S. Tsirkin wrote:
> Quoting r. Joe Damato <damato at psc.edu>:
> > Subject: Re: unable to run ibv_uc_pingpong and other example binaries
> > OK, just tried it, same problem:
> > [root at frodo examples]# pwd
> > /cluster/src/OPENIB_SRC/openib-2734/gen2/trunk/src/userspace/libibverbs/examples
> > [root at frodo examples]# .libs/ibv_uc_pingpong
> > libucm: Error <-1:6> couldn't open IB cm device </dev/infiniband/ucm>
> 
> OK, this one is because you installed libibcm into 
> /usr/local/lib/infiniband which is a plugin directory instead if
> /usr/local/lib, so it goes.
> 
> > open("/usr/local/lib/infiniband/libibcm.so", O_RDONLY) = 3
> 
> Simply remove /usr/local/lib/infiniband/libucm.so
> and it will go away.

It appears to be invoking libucm just fine (the location is not the
issue). The issue is ucm module is not started.

> Longer term I think libucm config script must be fixed: libraries
> go to /usr/local/lib by default. Hal?

As far as I know, the current agreed upon default is
/usr/local/xxx/infiniband where xxx is lib and include.

> Hal, I also think it may not be such a good idea for a library
> to start opening files and print things out to standard error
> when its loaded.
> Rather, a library should have some sane init/cleanup functions.

Due to hot swap or other issues ? I think all the user space libraries
do this with perhaps the exception of libibverbs.

-- Hal