summaryrefslogtreecommitdiff
path: root/debug_counter.c
diff options
context:
space:
mode:
authorko1 <ko1@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2017-02-21 08:18:15 (GMT)
committerko1 <ko1@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>2017-02-21 08:18:15 (GMT)
commit76c4cca19c0c27b1c3ca6f597384707cccf3de06 (patch)
treebcb13fed3f68e50cbca8a4bd475157d9bfeb7dca /debug_counter.c
parent51de3aa2b27859305c74d5664724192602c4608f (diff)
add performance counting mechanism for MRI debug/tuning purpose.
* How to enable this feature? * define USE_DEBUG_COUNTER as 1. * you can disable to output the result with RUBY_DEBUG_COUNTER_DISABLE environment variable even if USE_DEBUG_COUNTER == 1. * How to add new counter? * add COUNTER(<name>) line on debug_counter.h. * include "debug_counter.h" * insert RB_DEBUG_COUNTER_INC(<name>) line on your favorite place. * counter output example: [RUBY_DEBUG_COUNTER] mc_inline_hit 999 [RUBY_DEBUG_COUNTER] mc_inline_miss 3 [RUBY_DEBUG_COUNTER] mc_global_hit 23 [RUBY_DEBUG_COUNTER] mc_global_miss 273 [RUBY_DEBUG_COUNTER] mc_global_state_miss 3 [RUBY_DEBUG_COUNTER] mc_class_serial_miss 0 [RUBY_DEBUG_COUNTER] mc_cme_complement 0 [RUBY_DEBUG_COUNTER] mc_cme_complement_hit 0 [RUBY_DEBUG_COUNTER] mc_search_super 1384 [RUBY_DEBUG_COUNTER] ivar_get_hit 0 [RUBY_DEBUG_COUNTER] ivar_get_miss 0 [RUBY_DEBUG_COUNTER] ivar_set_hit 0 [RUBY_DEBUG_COUNTER] ivar_set_miss 0 [RUBY_DEBUG_COUNTER] ivar_get 431 [RUBY_DEBUG_COUNTER] ivar_set 465 * mc_... is related to method caching. * ivar_... is related to instance variable accesses. * compare with dtrace/system tap features, there are completely no performacne penalties when it is disabled. * This feature is supported only on __GNUC__ compilers. git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@57676 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'debug_counter.c')
-rw-r--r--debug_counter.c39
1 files changed, 39 insertions, 0 deletions
diff --git a/debug_counter.c b/debug_counter.c
new file mode 100644
index 0000000..7c23354
--- /dev/null
+++ b/debug_counter.c
@@ -0,0 +1,39 @@
+/**********************************************************************
+
+ debug_counter.c -
+
+ created at: Tue Feb 21 16:51:18 2017
+
+ Copyright (C) 2017 Koichi Sasada
+
+**********************************************************************/
+
+#include "debug_counter.h"
+#include <stdio.h>
+
+#if USE_DEBUG_COUNTER
+
+/* do not modify manually. use a script above */
+const char * const debug_counter_names[] = {
+#include "debug_counter_names.inc"
+ ""
+};
+
+size_t rb_debug_counter[RB_DEBUG_COUNTER_MAX + 1];
+
+__attribute__((destructor))
+static void
+rb_debug_counter_show_results(void)
+{
+ const char *env = getenv("RUBY_DEBUG_COUNTER_DISABLE");
+ if (env == NULL || strcmp("1", env) != 0) {
+ int i;
+ for (i=0; i<RB_DEBUG_COUNTER_MAX; i++) {
+ fprintf(stderr, "[RUBY_DEBUG_COUNTER]\t%s\t%"PRIuSIZE"\n",
+ debug_counter_names[i],
+ rb_debug_counter[i]);
+ }
+ }
+}
+
+#endif /* USE_DEBUG_COUNTER */