[ofa-general] Re: Is ibv_get_async_event() a blocking call ?
rdreier at cisco.com
Fri Mar 2 14:29:33 PST 2007
> > I wonder if libibverbs can do this way for application and make
> > ibv_get_async_event() non-blocking. But I will try this way now.
> I wonder what happens if you set the async file descriptor to
> Roland? Would that return EWOULDBLOCK if there are no events?
Yes, as you can see if you look at the libibverbs internals,
ibv_get_async_event() is just doing read() on a file descriptor. So
all the standard ways of handling finding out whether the descriptor
is ready to read should work: block in read(), use poll(), epoll,
SIGIO, async IO, etc. And using fcntl to set the descriptor to
non-blocking mode would work too.
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