Add node memory usage info to V3Stats (#4684)

src/V3Ast.h

@@ -107,6 +107,7 @@ struct VNTypeInfo {
         OP_OPTIONAL,
     } m_opType[4];
     const char* m_opNamep[4];
+    size_t m_sizeof;
 };
 
 class VNType final {

src/V3Stats.cpp

@@ -104,8 +104,8 @@ public:
         iterateConst(nodep);
 
         // Shorthand
-        const auto addStat = [&](const std::string& name, double count) {  //
-            V3Stats::addStat(stage, name, count);
+        const auto addStat = [&](const std::string& name, double count, unsigned precision = 0) {
+            V3Stats::addStat(stage, name, count, precision);
         };
 
         // Variable widths
@@ -124,13 +124,25 @@ public:
             }
         }
 
-        // Node types
+        // Node types (also total memory usage)
         const auto typeName = [](int type) { return std::string{VNType{type}.ascii()}; };
+        const auto typeSize = [](int type) { return VNType{type}.typeInfo()->m_sizeof; };
+        size_t totalNodeMemoryUsage = 0;
         for (int t = 0; t < VNType::_ENUM_END; ++t) {
             if (const uint64_t count = m_counters.m_statTypeCount[t]) {
+                totalNodeMemoryUsage += count * typeSize(t);
                 addStat("Node count, " + typeName(t), count);
             }
         }
+        addStat("Node memory TOTAL (MiB)", totalNodeMemoryUsage >> 20);
+
+        // Node Memory usage
+        for (int t = 0; t < VNType::_ENUM_END; ++t) {
+            if (const uint64_t count = m_counters.m_statTypeCount[t]) {
+                const double share = 100.0 * count * typeSize(t) / totalNodeMemoryUsage;
+                addStat("Node memory share (%), " + typeName(t), share, 2);
+            }
+        }
 
         // Expression combinations
         for (int t1 = 0; t1 < VNType::_ENUM_END; ++t1) {

src/V3Stats.h

@@ -68,7 +68,8 @@ public:
 class V3Statistic final {
     // A statistical entry we want published into the database
     const string m_name;  ///< Name of this statistic
-    double m_count;  ///< Count of occurrences/ value
+    double m_value;  ///< Value of statistic (count, ratio, etc.)
+    unsigned m_precision;  ///< Precision to print with (number of fractional digits)
     const string m_stage;  ///< Runtime stage
     const bool m_sumit;  ///< Do summation of similar stats
     const bool m_perf;  ///< Performance section
@@ -77,20 +78,22 @@ public:
     // METHODS
     string stage() const VL_MT_SAFE { return m_stage; }
     string name() const VL_MT_SAFE { return m_name; }
-    double count() const VL_MT_SAFE { return m_count; }
+    double value() const VL_MT_SAFE { return m_value; }
+    unsigned precision() const VL_MT_SAFE { return m_precision; }
     bool sumit() const VL_MT_SAFE { return m_sumit; }
     bool perf() const VL_MT_SAFE { return m_perf; }
     bool printit() const VL_MT_SAFE { return m_printit; }
     virtual void dump(std::ofstream& os) const VL_MT_SAFE;
     void combineWith(V3Statistic* otherp) {
-        m_count += otherp->count();
+        m_value += otherp->value();
         otherp->m_printit = false;
     }
     // CONSTRUCTORS
-    V3Statistic(const string& stage, const string& name, double count, bool sumit = false,
-                bool perf = false)
+    V3Statistic(const string& stage, const string& name, double value, unsigned precision,
+                bool sumit = false, bool perf = false)
         : m_name{name}
-        , m_count{count}
+        , m_value{value}
+        , m_precision{precision}
         , m_stage{stage}
         , m_sumit{sumit}
         , m_perf{perf} {}
@@ -102,17 +105,18 @@ public:
 class V3Stats final {
 public:
     static void addStat(const V3Statistic&);
-    static void addStat(const string& stage, const string& name, double count) {
-        addStat(V3Statistic{stage, name, count});
+    static void addStat(const string& stage, const string& name, double value,
+                        unsigned precision = 0) {
+        addStat(V3Statistic{stage, name, value, precision});
     }
-    static void addStat(const string& name, double count) {
-        addStat(V3Statistic{"*", name, count});
+    static void addStat(const string& name, double value, unsigned precision = 0) {
+        addStat(V3Statistic{"*", name, value, precision});
     }
     static void addStatSum(const string& name, double count) {
-        addStat(V3Statistic{"*", name, count, true});
+        addStat(V3Statistic{"*", name, count, 0, true});
     }
-    static void addStatPerf(const string& name, double count) {
-        addStat(V3Statistic{"*", name, count, true, true});
+    static void addStatPerf(const string& name, double value) {
+        addStat(V3Statistic{"*", name, value, 6, true, true});
     }
     /// Called each stage
     static void statsStage(const string& name);

src/V3StatsReport.cpp

@@ -181,11 +181,8 @@ StatsReport::StatColl StatsReport::s_allStats;
 // V3Statstic class
 
 void V3Statistic::dump(std::ofstream& os) const {
-    if (perf()) {
-        os << "  " << std::right << std::fixed << std::setprecision(6) << std::setw(9) << count();
-    } else {
-        os << "  " << std::right << std::fixed << std::setprecision(0) << std::setw(9) << count();
-    }
+    os << "  " << std::right << std::fixed << std::setprecision(precision()) << std::setw(9)
+       << value();
 }
 
 //######################################################################

src/astgen

@@ -933,8 +933,8 @@ def write_ast_type_info(filename):
                 ['VNTypeInfo::{0}'.format(s) for s in opTypeList])
             opNameStr = ', '.join(['"{0}"'.format(s) for s in opNameList])
             fh.write(
-                '    {{ "Ast{name}", {{{opTypeStr}}}, {{{opNameStr}}} }},\n'.
-                format(
+                '    {{ "Ast{name}", {{{opTypeStr}}}, {{{opNameStr}}}, sizeof(Ast{name}) }},\n'
+                .format(
                     name=node.name,
                     opTypeStr=opTypeStr,
                     opNameStr=opNameStr,