From afa252b0b962be0192b6badf81d2d39ec4f40e4f Mon Sep 17 00:00:00 2001 From: Andreas Hansson Date: Fri, 6 Nov 2015 03:26:42 -0500 Subject: [PATCH] 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. --- configs/example/memtest.py | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) 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 -- 2.30.2