diff options
author | ko1 <ko1@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-02-21 08:18:15 +0000 |
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committer | ko1 <ko1@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-02-21 08:18:15 +0000 |
commit | 76c4cca19c0c27b1c3ca6f597384707cccf3de06 (patch) | |
tree | bcb13fed3f68e50cbca8a4bd475157d9bfeb7dca /debug_counter.c | |
parent | 51de3aa2b27859305c74d5664724192602c4608f (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.c | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/debug_counter.c b/debug_counter.c new file mode 100644 index 0000000000..7c23354df1 --- /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 */ |