[Pvfs2-developers] epoll fun

[Phil Carns]

> One thing I noticed:  For an unexpected receive, we do a peek on the  
> socket (recv(...MSG_PEEK)) and see if a full bmi header is there.  If  
> it is, we set the socket back to blocking mode, do a blocking recv  for 
> the header, and set then set the socket back to non-blocking  mode.  Rob 
> pointed out that we probably don't need to set the socket  to blocking.  
> Is there some reason we do that, instead of just do the  recv in 
> non-blocking mode since we've already checked that the bytes  are there?

Yeah, I think you are right about this- nbrecv should be just fine for 
this case.

Thanks for putting all of those graphs together.  Very interesting, but 
so far I have no clue why that would happen.

-Phil