add type_cache_resizes and type_cache_invalidations stats

Author: kumaraditya303

Include/cpython/pystats.h

@@ -97,6 +97,8 @@ typedef struct _object_stats {
     uint64_t type_cache_dunder_hits;
     uint64_t type_cache_dunder_misses;
     uint64_t type_cache_too_big;
+    uint64_t type_cache_invalidations;
+    uint64_t type_cache_resizes;
     /* Temporary value used during GC */
     uint64_t object_visits;
 } ObjectStats;

Python/pystats.c

@@ -233,6 +233,8 @@ print_object_stats(FILE *out, ObjectStats *stats)
     fprintf(out, "Object method cache too big: %" PRIu64 "\n", stats->type_cache_too_big);
     fprintf(out, "Object method cache dunder hits: %" PRIu64 "\n", stats->type_cache_dunder_hits);
     fprintf(out, "Object method cache dunder misses: %" PRIu64 "\n", stats->type_cache_dunder_misses);
+    fprintf(out, "Object method cache invalidations: %" PRIu64 "\n", stats->type_cache_invalidations);
+    fprintf(out, "Object method cache resizes: %" PRIu64 "\n", stats->type_cache_resizes);
 }
 
 static void
@@ -440,6 +442,8 @@ merge_object_stats(ObjectStats *dest, const ObjectStats *src)
     dest->type_cache_dunder_hits += src->type_cache_dunder_hits;
     dest->type_cache_dunder_misses += src->type_cache_dunder_misses;
     dest->type_cache_too_big += src->type_cache_too_big;
+    dest->type_cache_invalidations += src->type_cache_invalidations;
+    dest->type_cache_resizes += src->type_cache_resizes;
     dest->object_visits += src->object_visits;
 }
 

Python/typecache.c

@@ -157,6 +157,7 @@ cache_resize(PyTypeObject *type, struct type_cache *cache)
     if (new_cache == NULL) {
         return -1;
     }
+    OBJECT_STAT_INC(type_cache_resizes);
     for (uint32_t i = 0; i < old_size; i++) {
         if (cache->hashtable[i].name != NULL) {
             cache_insert(new_cache, cache->hashtable[i].name, cache->hashtable[i].value);
@@ -238,6 +239,7 @@ _PyTypeCache_Lookup(PyTypeObject *type, PyObject *name)
 void
 _PyTypeCache_Invalidate(PyTypeObject *type)
 {
+    OBJECT_STAT_INC(type_cache_invalidations);
     struct type_cache *cache = cache_get(type);
     cache_set(type, &empty_cache);
     cache_free_delayed(cache);