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| author | Pouya Fotouhi <Pouya.Fotouhi@amd.com> | 2019-08-07 19:43:27 -0500 |
|---|---|---|
| committer | Pouya Fotouhi <pfotouhi@ucdavis.edu> | 2019-08-12 18:21:28 +0000 |
| commit | 507a0cecc5fb7e7575079e945188800552f30288 (patch) | |
| tree | 4f12cc8408249a53bae9a0312f99226e52bf47f0 /src/mem | |
| parent | e424be8281cfca6b05297a9d51ca979b555bdfca (diff) | |
| download | gem5-507a0cecc5fb7e7575079e945188800552f30288.tar.xz | |
mem-ruby: Use check_on_cache_probe to protect locked lines from eviction
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>
Diffstat (limited to 'src/mem')
| -rw-r--r-- | src/mem/protocol/MESI_Three_Level-L0cache.sm | 18 |
1 files changed, 12 insertions, 6 deletions
diff --git a/src/mem/protocol/MESI_Three_Level-L0cache.sm b/src/mem/protocol/MESI_Three_Level-L0cache.sm index a87a3d9fd..84bb0d868 100644 --- a/src/mem/protocol/MESI_Three_Level-L0cache.sm +++ b/src/mem/protocol/MESI_Three_Level-L0cache.sm @@ -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]); } } } |