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authorKorey Sewell <ksewell@umich.edu>2011-02-18 14:27:52 -0500
committerKorey Sewell <ksewell@umich.edu>2011-02-18 14:27:52 -0500
commit991d0185c68b53a04ae5d1f1a05749bbfddced89 (patch)
tree70a97d5b52ff695810b00513a9b3e0907e2a5d4b /src/cpu/o3/dep_graph.hh
parent2971b8401a4a76a774962900d9aed6e9eb4b2950 (diff)
downloadgem5-991d0185c68b53a04ae5d1f1a05749bbfddced89.tar.xz
inorder: initialize res. req. vectors based on resource bandwidth
first change in an optimization that will stop InOrder from allocating new memory for every instruction's request to a resource. This gets expensive since every instruction needs to access ~10 requests before graduation. Instead, the plan is to allocate just enough resource request objects to satisfy each resource's bandwidth (e.g. the execution unit would need to allocate 3 resource request objects for a 1-issue pipeline since on any given cycle it could have 2 read requests and 1 write request) and then let the instructions contend and reuse those allocated requests. The end result is a smaller memory footprint for the InOrder model and increased simulation performance
Diffstat (limited to 'src/cpu/o3/dep_graph.hh')
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