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mem-ruby: Use check_on_cache_probe to protect locked lines from eviction

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This change uses check_on_cache_probe statement to check if the cacheline
subject to eviction is locked in MESI Three Level.

Change-Id: Ib0de54aa067c7603db1f7321cc4825b123b641ac
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/19868
Reviewed-by: Jason Lowe-Power <jason@lowepower.com>
Maintainer: Jason Lowe-Power <jason@lowepower.com>
Tested-by: kokoro <noreply+kokoro@google.com>
This commit is contained in:
Pouya Fotouhi
2019-08-07 19:43:27 -05:00
committed by Pouya Fotouhi
parent e424be8281
commit 507a0cecc5
1 changed files with 12 additions and 6 deletions
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18
src/mem/protocol/MESI_Three_Level-L0cache.sm
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@@ -324,9 +324,12 @@ machine(MachineType:L0Cache, "MESI Directory L0 Cache")
Icache_entry, TBEs[in_msg.LineAddress]);
} else {
// No room in the L0, so we need to make room in the L0
trigger(Event:L0_Replacement, Icache.cacheProbe(in_msg.LineAddress),
getICacheEntry(Icache.cacheProbe(in_msg.LineAddress)),
TBEs[Icache.cacheProbe(in_msg.LineAddress)]);
// Check if the line we want to evict is not locked
Addr addr := Icache.cacheProbe(in_msg.LineAddress);
check_on_cache_probe(mandatoryQueue_in, addr);
trigger(Event:L0_Replacement, addr,
getICacheEntry(addr),
TBEs[addr]);
}
}
} else {
@@ -354,9 +357,12 @@ machine(MachineType:L0Cache, "MESI Directory L0 Cache")
Dcache_entry, TBEs[in_msg.LineAddress]);
} else {
// No room in the L1, so we need to make room in the L0
trigger(Event:L0_Replacement, Dcache.cacheProbe(in_msg.LineAddress),
getDCacheEntry(Dcache.cacheProbe(in_msg.LineAddress)),
TBEs[Dcache.cacheProbe(in_msg.LineAddress)]);
// Check if the line we want to evict is not locked
Addr addr := Dcache.cacheProbe(in_msg.LineAddress);
check_on_cache_probe(mandatoryQueue_in, addr);
trigger(Event:L0_Replacement, addr,
getDCacheEntry(addr),
TBEs[addr]);
}
}
}