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| author | Pouya Fotouhi <pfotouhi@ucdavis.edu> | 2019-02-27 13:47:57 -0800 |
|---|---|---|
| committer | Pouya Fotouhi <pfotouhi@ucdavis.edu> | 2019-08-12 18:17:56 +0000 |
| commit | e424be8281cfca6b05297a9d51ca979b555bdfca (patch) | |
| tree | 62f2ab1c081a6fff4f5c286517839c78715b56e8 /src/mem | |
| parent | fd95c6848501c01ee1ad1061ae91aebe455913cb (diff) | |
| download | gem5-e424be8281cfca6b05297a9d51ca979b555bdfca.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 Two Level. Other protocols should
be updated accordingly.
Signed-off-by: Pouya Fotouhi <pfotouhi@ucdavis.edu>
Change-Id: Idcdbc8ee528eb5e4e2f8d56a268a3a92eadd95b1
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/16809
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_Two_Level-L1cache.sm | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/src/mem/protocol/MESI_Two_Level-L1cache.sm b/src/mem/protocol/MESI_Two_Level-L1cache.sm index 87684ce10..51d3f621c 100644 --- a/src/mem/protocol/MESI_Two_Level-L1cache.sm +++ b/src/mem/protocol/MESI_Two_Level-L1cache.sm @@ -472,9 +472,14 @@ machine(MachineType:L1Cache, "MESI Directory L1 Cache CMP") L1Icache_entry, TBEs[in_msg.LineAddress]); } else { // No room in the L1, so we need to make room in the L1 - trigger(Event:L1_Replacement, L1Icache.cacheProbe(in_msg.LineAddress), - getL1ICacheEntry(L1Icache.cacheProbe(in_msg.LineAddress)), - TBEs[L1Icache.cacheProbe(in_msg.LineAddress)]); + + // Check if the line we want to evict is not locked + Addr addr := L1Icache.cacheProbe(in_msg.LineAddress); + check_on_cache_probe(mandatoryQueue_in, addr); + + trigger(Event:L1_Replacement, addr, + getL1ICacheEntry(addr), + TBEs[addr]); } } } else { @@ -502,9 +507,14 @@ machine(MachineType:L1Cache, "MESI Directory L1 Cache CMP") L1Dcache_entry, TBEs[in_msg.LineAddress]); } else { // No room in the L1, so we need to make room in the L1 - trigger(Event:L1_Replacement, L1Dcache.cacheProbe(in_msg.LineAddress), - getL1DCacheEntry(L1Dcache.cacheProbe(in_msg.LineAddress)), - TBEs[L1Dcache.cacheProbe(in_msg.LineAddress)]); + + // Check if the line we want to evict is not locked + Addr addr := L1Dcache.cacheProbe(in_msg.LineAddress); + check_on_cache_probe(mandatoryQueue_in, addr); + + trigger(Event:L1_Replacement, addr, + getL1DCacheEntry(addr), + TBEs[addr]); } } } |