[ofa-general] Re: How fast to get RDMA_CM_EVENT_DISCONNECTED ?

[Sean Hefty]

> 	A question about rdmacm library. I use rdma_connect/accept to
> wire the IB connection between A and B. Somehow the IB connection is
> broken by either process B dies, or a bad cable. If process A just
> receives messages from process B, can process A get a
> RDMA_CM_EVENT_DISCONNECTED event ? if yes, how fast A can get such event
> ?

If the process B dies, the kernel IB CM on B's system will automatically 
disconnect.  Process A should get this fairly close to when process B dies.

I'm not as sure about the timing for a bad cable.

Slightly off topic, but how do you handle flow control between process A and B 
if process A only receives?

- Sean