Nathanael Premillieu has submitted this change. (
https://gem5-review.googlesource.com/c/public/gem5/+/47599 )
Change subject: mem-cache: move unusedPrefetches stat to prefetcher
......................................................................
mem-cache: move unusedPrefetches stat to prefetcher
This stat belongs to prefetchers.
It has been renamed to pfUnused to match the naming of
exisiting prefetcher stats.
Change-Id: Iec350a62da544535dfc0c2527fcdf73217ae4db7
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/47599
Reviewed-by: Daniel Carvalho <oda...@yahoo.com.br>
Reviewed-by: Nikos Nikoleris <nikos.nikole...@arm.com>
Maintainer: Daniel Carvalho <oda...@yahoo.com.br>
Tested-by: kokoro <noreply+kok...@google.com>
---
M src/mem/cache/base.cc
M src/mem/cache/base.hh
M src/mem/cache/prefetch/base.cc
M src/mem/cache/prefetch/base.hh
4 files changed, 16 insertions(+), 11 deletions(-)
Approvals:
Nikos Nikoleris: Looks good to me, approved
Daniel Carvalho: Looks good to me, approved; Looks good to me, approved
kokoro: Regressions pass
diff --git a/src/mem/cache/base.cc b/src/mem/cache/base.cc
index 236f4e7..649160e 100644
--- a/src/mem/cache/base.cc
+++ b/src/mem/cache/base.cc
@@ -1570,7 +1570,7 @@
{
// If block is still marked as prefetched, then it hasn't been used
if (blk->wasPrefetched()) {
- stats.unusedPrefetches++;
+ prefetcher->prefetchUnused();
}
// Notify that the data contents for this address are no longer present
@@ -2126,9 +2126,8 @@
ADD_STAT(avgBlocked, statistics::units::Rate<
statistics::units::Cycle, statistics::units::Count>::get(),
"average number of cycles each access was blocked"),
- ADD_STAT(unusedPrefetches, statistics::units::Count::get(),
- "number of HardPF blocks evicted w/o reference"),
- ADD_STAT(writebacks, statistics::units::Count::get(), "number of
writebacks"),
+ ADD_STAT(writebacks, statistics::units::Count::get(),
+ "number of writebacks"),
ADD_STAT(demandMshrHits, statistics::units::Count::get(),
"number of demand (read+write) MSHR hits"),
ADD_STAT(overallMshrHits, statistics::units::Count::get(),
@@ -2287,8 +2286,6 @@
;
avgBlocked = blockedCycles / blockedCauses;
- unusedPrefetches.flags(nozero);
-
writebacks
.init(max_requestors)
.flags(total | nozero | nonan)
diff --git a/src/mem/cache/base.hh b/src/mem/cache/base.hh
index 581edf9..2afad5f 100644
--- a/src/mem/cache/base.hh
+++ b/src/mem/cache/base.hh
@@ -1084,10 +1084,6 @@
/** The average number of cycles blocked for each blocked cause. */
statistics::Formula avgBlocked;
- /** The number of times a HW-prefetched block is evicted w/o
- * reference. */
- statistics::Scalar unusedPrefetches;
-
/** Number of blocks written back per thread. */
statistics::Vector writebacks;
diff --git a/src/mem/cache/prefetch/base.cc b/src/mem/cache/prefetch/base.cc
index b5be0f9..58a7439 100644
--- a/src/mem/cache/prefetch/base.cc
+++ b/src/mem/cache/prefetch/base.cc
@@ -120,8 +120,11 @@
Base::StatGroup::StatGroup(statistics::Group *parent)
: statistics::Group(parent),
ADD_STAT(pfIssued, statistics::units::Count::get(),
- "number of hwpf issued")
+ "number of hwpf issued"),
+ ADD_STAT(pfUnused, statistics::units::Count::get(),
+ "number of HardPF blocks evicted w/o reference")
{
+ pfUnused.flags(statistics::nozero);
}
diff --git a/src/mem/cache/prefetch/base.hh b/src/mem/cache/prefetch/base.hh
index 059f814..b7eef83 100644
--- a/src/mem/cache/prefetch/base.hh
+++ b/src/mem/cache/prefetch/base.hh
@@ -52,6 +52,7 @@
#include "base/compiler.hh"
#include "base/statistics.hh"
#include "base/types.hh"
+#include "mem/cache/cache_blk.hh"
#include "mem/packet.hh"
#include "mem/request.hh"
#include "sim/byteswap.hh"
@@ -328,6 +329,9 @@
{
StatGroup(statistics::Group *parent);
statistics::Scalar pfIssued;
+ /** The number of times a HW-prefetched block is evicted w/o
+ * reference. */
+ statistics::Scalar pfUnused;
} prefetchStats;
/** Total prefetches issued */
@@ -358,6 +362,11 @@
virtual Tick nextPrefetchReadyTime() const = 0;
+ void
+ prefetchUnused()
+ {
+ prefetchStats.pfUnused++;
+ }
/**
* Register probe points for this object.
--
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Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: Iec350a62da544535dfc0c2527fcdf73217ae4db7
Gerrit-Change-Number: 47599
Gerrit-PatchSet: 6
Gerrit-Owner: Nathanael Premillieu <nathanael.premill...@huawei.com>
Gerrit-Reviewer: Daniel Carvalho <oda...@yahoo.com.br>
Gerrit-Reviewer: Jason Lowe-Power <power...@gmail.com>
Gerrit-Reviewer: Nathanael Premillieu <nathanael.premill...@huawei.com>
Gerrit-Reviewer: Nikos Nikoleris <nikos.nikole...@arm.com>
Gerrit-Reviewer: kokoro <noreply+kok...@google.com>
Gerrit-MessageType: merged
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