cpu: add more instruction mix statistics

For the o3, add instruction mix (OpClass) histogram at commit (stats
also already collected at issue). For the simple CPUs we add a
histogram of executed instructions

2 files changed, 11 insertions, 0 deletions

diff --git a/src/cpu/o3/commit.hh b/src/cpu/o3/commit.hh
index cd663e2df..ba594a2d2 100644
--- a/src/cpu/o3/commit.hh
+++ b/src/cpu/o3/commit.hh
@@ -532,6 +532,8 @@ class DefaultCommit
     Stats::Vector statComInteger;
     /** Total number of function calls */
     Stats::Vector statComFunctionCalls;
+    /** Committed instructions by instruction type (OpClass) */
+    Stats::Vector2d statCommittedInstType;
 
     /** Number of cycles where the commit bandwidth limit is reached. */
     Stats::Scalar commitEligibleSamples;
diff --git a/src/cpu/o3/commit_impl.hh b/src/cpu/o3/commit_impl.hh
index 35d21d071..333687c84 100644
--- a/src/cpu/o3/commit_impl.hh
+++ b/src/cpu/o3/commit_impl.hh
@@ -273,6 +273,14 @@ DefaultCommit<Impl>::regStats()
         .flags(total)
         ;
 
+    statCommittedInstType
+        .init(numThreads,Enums::Num_OpClass)
+        .name(name() + ".op_class")
+        .desc("Class of committed instruction")
+        .flags(total | pdf | dist)
+        ;
+    statCommittedInstType.ysubnames(Enums::OpClassStrings);
+
     commitEligible
         .init(cpu->numThreads)
         .name(name() + ".bw_limited")
@@ -1032,6 +1040,7 @@ DefaultCommit<Impl>::commitInsts()
 
             if (commit_success) {
                 ++num_committed;
+                statCommittedInstType[tid][head_inst->opClass()]++;
                 ppCommit->notify(head_inst);
 
                 changedROBNumEntries[tid] = true;