base-stats,misc: Rename Stats namespace as statistics

As part of recent decisions regarding namespace
naming conventions, all namespaces will be changed
to snake case.

::Stats became ::statistics.

"statistics" was chosen over "stats" to avoid generating
conflicts with the already existing variables (there are
way too many "stats" in the codebase), which would make
this patch even more disturbing for the users.

Change-Id: If877b12d7dac356f86e3b3d941bf7558a4fd8719
Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br>
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/45421
Reviewed-by: Jason Lowe-Power <power.jg@gmail.com>
Maintainer: Jason Lowe-Power <power.jg@gmail.com>
Tested-by: kokoro <noreply+kokoro@google.com>

src/mem/cache/prefetch/base.cc

@@ -113,9 +113,11 @@ Base::setCache(BaseCache *_cache)
     blkSize = cache->getBlockSize();
     lBlkSize = floorLog2(blkSize);
 }
-Base::StatGroup::StatGroup(Stats::Group *parent)
-    : Stats::Group(parent),
-    ADD_STAT(pfIssued, Stats::units::Count::get(), "number of hwpf issued")
+
+Base::StatGroup::StatGroup(statistics::Group *parent)
+  : statistics::Group(parent),
+    ADD_STAT(pfIssued, statistics::units::Count::get(),
+        "number of hwpf issued")
 {
 }
 

src/mem/cache/prefetch/base.hh

@@ -321,10 +321,10 @@ class Base : public ClockedObject
     Addr pageOffset(Addr a) const;
     /** Build the address of the i-th block inside the page */
     Addr pageIthBlockAddress(Addr page, uint32_t i) const;
-    struct StatGroup : public Stats::Group
+    struct StatGroup : public statistics::Group
     {
-        StatGroup(Stats::Group *parent);
-        Stats::Scalar pfIssued;
+        StatGroup(statistics::Group *parent);
+        statistics::Scalar pfIssued;
     } prefetchStats;
 
     /** Total prefetches issued */

src/mem/cache/prefetch/queued.cc

@@ -226,17 +226,18 @@ Queued::getPacket()
     processMissingTranslations(queueSize - pfq.size());
     return pkt;
 }
-Queued::QueuedStats::QueuedStats(Stats::Group *parent)
-    : Stats::Group(parent),
-    ADD_STAT(pfIdentified, Stats::units::Count::get(),
+
+Queued::QueuedStats::QueuedStats(statistics::Group *parent)
+    : statistics::Group(parent),
+    ADD_STAT(pfIdentified, statistics::units::Count::get(),
              "number of prefetch candidates identified"),
-    ADD_STAT(pfBufferHit, Stats::units::Count::get(),
+    ADD_STAT(pfBufferHit, statistics::units::Count::get(),
              "number of redundant prefetches already in prefetch queue"),
-    ADD_STAT(pfInCache, Stats::units::Count::get(),
+    ADD_STAT(pfInCache, statistics::units::Count::get(),
              "number of redundant prefetches already in cache/mshr dropped"),
-    ADD_STAT(pfRemovedFull, Stats::units::Count::get(),
+    ADD_STAT(pfRemovedFull, statistics::units::Count::get(),
              "number of prefetches dropped due to prefetch queue size"),
-    ADD_STAT(pfSpanPage, Stats::units::Count::get(),
+    ADD_STAT(pfSpanPage, statistics::units::Count::get(),
              "number of prefetches that crossed the page")
 {
 }

src/mem/cache/prefetch/queued.hh

@@ -171,15 +171,15 @@ class Queued : public Base
     /** Percentage of requests that can be throttled */
     const unsigned int throttleControlPct;
 
-    struct QueuedStats : public Stats::Group
+    struct QueuedStats : public statistics::Group
     {
-        QueuedStats(Stats::Group *parent);
+        QueuedStats(statistics::Group *parent);
         // STATS
-        Stats::Scalar pfIdentified;
-        Stats::Scalar pfBufferHit;
-        Stats::Scalar pfInCache;
-        Stats::Scalar pfRemovedFull;
-        Stats::Scalar pfSpanPage;
+        statistics::Scalar pfIdentified;
+        statistics::Scalar pfBufferHit;
+        statistics::Scalar pfInCache;
+        statistics::Scalar pfRemovedFull;
+        statistics::Scalar pfSpanPage;
     } statsQueued;
   public:
     using AddrPriority = std::pair<Addr, int32_t>;