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mem-ruby: Replace SLICC queueMemory calls with enqueue

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Calls to queueMemoryRead and queueMemoryWrite do not consider the size
of the queue between ruby directories and DRAMCtrl which causes infinite
buffering in the queued port between the two. This adds a MessageBuffer
in between which uses enqueues in SLICC and is therefore size checked
before any SLICC transaction pushing to the buffer can occur, removing
the infinite buffering between the two.

Change-Id: Iedb9070844e4f6c8532a9c914d126105ec98d0bc
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/27427
Tested-by: Gem5 Cloud Project GCB service account <345032938727@cloudbuild.gserviceaccount.com>
Tested-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Bradford Beckmann <brad.beckmann@amd.com>
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Reviewed-by: Matt Sinclair <mattdsinclair@gmail.com>
Maintainer: Bradford Beckmann <brad.beckmann@amd.com>
This commit is contained in:
Matt Poremba
2018-02-08 11:48:21 -08:00
committed by Matthew Poremba
parent 8b2b0f8d71
commit 53b6e21c63
25 changed files with 445 additions and 172 deletions
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1
configs/ruby/GPU_VIPER.py
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@@ -453,6 +453,7 @@ def create_system(options, full_system, system, dma_devices, bootmem,
dir_cntrl.triggerQueue = MessageBuffer(ordered = True)
dir_cntrl.L3triggerQueue = MessageBuffer(ordered = True)
dir_cntrl.requestToMemory = MessageBuffer()
dir_cntrl.responseFromMemory = MessageBuffer()
exec("ruby_system.dir_cntrl%d = dir_cntrl" % i)