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config: Update memtest to stress test cache clusivity

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This patch adds an new twist to the memtest cache hierarchy, in that
it switches from mostly inclusive to mostly exclusive at every level
in the tree. This has helped weed out plenty issues, and serves as a
good stress tests.
This commit is contained in:
Andreas Hansson 2015-11-06 03:26:42 -05:00
parent 654266f39c
commit afa252b0b9
1 changed files with 10 additions and 1 deletions
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11
configs/example/memtest.py
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@ -177,7 +177,7 @@ else:
# Define a prototype L1 cache that we scale for all successive levels # Define a prototype L1 cache that we scale for all successive levels
proto_l1 = Cache(size = '32kB', assoc = 4, proto_l1 = Cache(size = '32kB', assoc = 4,
hit_latency = 1, response_latency = 1, hit_latency = 1, response_latency = 1,
tgts_per_mshr = 8) tgts_per_mshr = 8, clusivity = 'mostly_incl')
if options.blocking: if options.blocking:
proto_l1.mshrs = 1 proto_l1.mshrs = 1
@ -197,6 +197,15 @@ for scale in cachespec[:-1]:
next.response_latency = prev.response_latency * 10 next.response_latency = prev.response_latency * 10
next.assoc = prev.assoc * scale next.assoc = prev.assoc * scale
next.mshrs = prev.mshrs * scale next.mshrs = prev.mshrs * scale
# Swap the inclusivity/exclusivity at each level. L2 is mostly
# exclusive with respect to L1, L3 mostly inclusive, L4 mostly
# exclusive etc.
if (prev.clusivity.value == 'mostly_incl'):
next.clusivity = 'mostly_excl'
else:
next.clusivity = 'mostly_incl'
cache_proto.insert(0, next) cache_proto.insert(0, next)
# Make a prototype for the tester to be used throughout # Make a prototype for the tester to be used throughout