Newsgroups: comp.parallel
From: Rich Martin <rmartin@later.cs.berkeley.edu>
Subject: Source code for Active Messages on Myrinet available
Organization: University of California, Berkeley
Date: 11 Sep 1995 15:31:12 GMT
Message-ID: <431ko0$2k0@usenet.srv.cis.pitt.edu>

Subject: Source code for Active Messages on Myrinet available

We have released the first version of Lanai Active Messsages. LAM runs on 
SBus-based LANai Boards from Myricom. This release has been tested on a 
32-node system. The source code can be obtained via the world-wide web: 

http://now.cs.berkeley.edu/AM/active_messages.html

Some features of the release include: 

       Conforms to The Generic Active Message Interface Specification 

       Extends the GAM spec with three calls: 
              am_sleep(): Blocks the thread until Message Arrival. 
              am_request_5(): Send that extra word in a pinch. 
              am_reply_xfer(): It's back! Reply handlers can now push block
	      data back to the source. 

       Can exist on the same physical network with Myricom's TCP/IP drivers.
    
       A user-level network mapper will generate automatic routing tables.
  
See the Web page for documentation. 

The source for GAM micro-benchmarks from Hot Interconnects III is
included. The results from the GAM u-bench on Sparc 20's: 

       Round Trip Time: 34.5160 usec (polling) 
       Overhead (send) : 2.0271 usec 
       Overhead (receive) : 3.8916 usec 
       Network Latency : 11.3393 usec 
       gap (interval between successive messages) : 12.0304 usec 
       G (peak per-byte Bandwidth) : 28 MB/s 

