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authorAndreas Hansson <andreas.hansson@arm.com>2015-11-06 03:26:42 -0500
committerAndreas Hansson <andreas.hansson@arm.com>2015-11-06 03:26:42 -0500
commitafa252b0b962be0192b6badf81d2d39ec4f40e4f (patch)
tree0f8bc6a4c3c80fc530c0c3df13aaf5606fbc9c8e /configs
parent654266f39cd67055d6176d22a46c7d678f6340c4 (diff)
downloadgem5-afa252b0b962be0192b6badf81d2d39ec4f40e4f.tar.xz
config: Update memtest to stress test cache clusivity
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.
Diffstat (limited to 'configs')
-rw-r--r--configs/example/memtest.py11
1 files changed, 10 insertions, 1 deletions
diff --git a/configs/example/memtest.py b/configs/example/memtest.py
index 08f134533..354451a61 100644
--- a/configs/example/memtest.py
+++ b/configs/example/memtest.py
@@ -177,7 +177,7 @@ else:
# Define a prototype L1 cache that we scale for all successive levels
proto_l1 = Cache(size = '32kB', assoc = 4,
hit_latency = 1, response_latency = 1,
- tgts_per_mshr = 8)
+ tgts_per_mshr = 8, clusivity = 'mostly_incl')
if options.blocking:
proto_l1.mshrs = 1
@@ -197,6 +197,15 @@ for scale in cachespec[:-1]:
next.response_latency = prev.response_latency * 10
next.assoc = prev.assoc * 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)
# Make a prototype for the tester to be used throughout