[ofw] help about WinVerbs

[Hefty, Sean]

copying ofw mail list on respose:

The comp_channel abstraction is used internally to libibverbs and librdmacm.  It is separated out for use by DAPL and other applications, but its use is not required.  On Linux, several applications call select/poll on the fd's associated with the verbs and rdma_cm event/completion channels.  This is OS specific functionality and is not possible on Windows, the comp_channel abstraction provides functionality somewhat similar to calling select/poll on the fd's, including simulating calls such as fdset.

- Sean


>   Sean Hefty created the completion channel 'comp_channel' abstraction to
> handle, I believe, rdma_cm completion events.
> You do not need to use the comp_channel interfaces directly, although they
> are used in rdma_cm connection management for you by librdmacm library.
> Sean, is this a correct statement?
> 
> stan.
> 
> ________________________________
> 
> From: Jie Hou [mailto:hjieboy85 at googlemail.com]
> Sent: Wednesday, August 04, 2010 12:31 AM
> To: Smith, Stan
> Subject: help about WinVerbs
> 
> 
> Dear Stan,
> Now I am trying to use WinVerbs directly to make some test programs such as
> (pingpong examples). Here I have a problem to ask you. It is like this:
> 1> I checked the source code of libibverbs (for Windows), and I found that
> it is based on the WinVerbs. Furthermore, this libibverbs library also uses
> the files (comp_channel.h, comp_channel.cpp). Could you please tell me what
> do the functions in the comp_channel.h do? Why do you use these files in
> Windows environment? However, in linux environment, the libibverbs library
> doesn't use these files. As you know, I am also new to network programming.
> So I hope that you can explain me a little about files about comp_channel.
> What knowledge and books should I study?
> Thank you very much in advance!
> Have a nice day!
> With best regards,
> Joey