Daniel Carvalho has uploaded this change for review. (
https://gem5-review.googlesource.com/c/public/gem5/+/37096 )
Change subject: mem-cache: Add invalidation/eviction probe to cache
......................................................................
mem-cache: Add invalidation/eviction probe to cache
Some devices and policies may need the invalidation/eviction
information to handle their affairs.
Jira: https://gem5.atlassian.net/browse/GEM5-814
Change-Id: I1ff3c09c63d5402765c2125c4d76d95b614877d6
Signed-off-by: Daniel R. Carvalho <[email protected]>
---
M src/mem/cache/base.cc
M src/mem/cache/base.hh
2 files changed, 16 insertions(+), 0 deletions(-)
diff --git a/src/mem/cache/base.cc b/src/mem/cache/base.cc
index b74e8cc..4378889 100644
--- a/src/mem/cache/base.cc
+++ b/src/mem/cache/base.cc
@@ -1467,6 +1467,17 @@
stats.unusedPrefetches++;
}
+ // Create a dummy packet to inform the probe of the invalidation
+ RequestPtr req = std::make_shared<Request>(
+ regenerateBlkAddr(blk), blkSize, 0, Request::wbMasterId);
+ if (blk->isSecure())
+ req->setFlags(Request::SECURE);
+ req->taskId(blk->getTaskId());
+ Packet dummy_pkt(req, MemCmd::WriteClean);
+ dummy_pkt.allocate();
+ dummy_pkt.setDataFromBlock(blk->data, blkSize);
+ ppInvalidation->notify(&dummy_pkt);
+
// If handling a block present in the Tags, let it do its invalidation
// process, which will update stats and invalidate the block itself
if (blk != tempBlock) {
@@ -2283,6 +2294,8 @@
ppHit = new ProbePointArg<PacketPtr>(this->getProbeManager(), "Hit");
ppMiss = new ProbePointArg<PacketPtr>(this->getProbeManager(), "Miss");
ppFill = new ProbePointArg<PacketPtr>(this->getProbeManager(), "Fill");
+ ppInvalidation =
+ new
ProbePointArg<PacketPtr>(this->getProbeManager(), "Invalidation");
}
///////////////
diff --git a/src/mem/cache/base.hh b/src/mem/cache/base.hh
index 99b03ab..51b4a60 100644
--- a/src/mem/cache/base.hh
+++ b/src/mem/cache/base.hh
@@ -334,6 +334,9 @@
/** To probe when a cache fill occurs */
ProbePointArg<PacketPtr> *ppFill;
+ /** To probe when a cache invalidation or eviction occurs */
+ ProbePointArg<PacketPtr> *ppInvalidation;
+
/**
* The writeAllocator drive optimizations for streaming writes.
* It first determines whether a WriteReq MSHR should be delayed,
--
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Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: I1ff3c09c63d5402765c2125c4d76d95b614877d6
Gerrit-Change-Number: 37096
Gerrit-PatchSet: 1
Gerrit-Owner: Daniel Carvalho <[email protected]>
Gerrit-MessageType: newchange
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