request timeouts in PCIE

Remember that

• the timeout does not stop if any data is received and

• the timeout is not retriggered when any matching completion is received.

The timeout starts when the request is issued, and it is only stopped if all data was received in time, i.e. after the final completion.

If there is not a high degree of request–completion parallelism in your application, say, if you have at most one flying request at any time, you'll sure be better off implementing a single timer counter.

– Matthias