Re: [Gems-users] Two questions on Garnet


Date: Mon, 02 Jun 2008 23:51:15 -0400
From: Niket Agarwal <niketa@xxxxxxxxxxxxx>
Subject: Re: [Gems-users] Two questions on Garnet

1. Does Garnet directly add latency to each interconnect due to pipelined
router ?   (from the stats, the link latency in topology print is only
decided by the topology file)
Yes, Garnet implicitly adds the pipeline delay. The topology print assumes the simple network model and is hence not coherent with Garnet.

2. With Garnet, is 'bandwidth' specified in topology file still used
(there is no information about bandwidth in stats)?  And, How is bandwidth
modeled in ruby without garnet?
Garnet does not use the bandwidth specified in the topology file. Bandwidth is modeled by controlling the 'flit size'

The simple model does model limited bandwidth by allowing only certain number of bytes to traverse a link simultaneously.

Niket
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