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* 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
67 lines
1.8 KiB
C
67 lines
1.8 KiB
C
/**********************************************************************
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debug_counter.h -
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created at: Tue Feb 21 16:51:18 2017
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Copyright (C) 2017 Koichi Sasada
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**********************************************************************/
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#ifndef RUBY_DEBUG_COUNTER_H
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#define RUBY_DEBUG_COUNTER_H 1
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#ifndef USE_DEBUG_COUNTER
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#define USE_DEBUG_COUNTER 0
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#endif
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#if !defined(__GNUC__) && USE_DEBUG_COUNTER
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#error "USE_DEBUG_COUNTER is not supported by other than __GNUC__"
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#endif
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enum rb_debug_counter_type {
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#define COUNTER(name) RB_DEBUG_COUNTER_##name
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COUNTER(mc_inline_hit),
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COUNTER(mc_inline_miss),
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COUNTER(mc_global_hit),
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COUNTER(mc_global_miss),
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COUNTER(mc_global_state_miss),
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COUNTER(mc_class_serial_miss),
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COUNTER(mc_cme_complement),
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COUNTER(mc_cme_complement_hit),
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COUNTER(mc_search_super),
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COUNTER(ivar_get_hit),
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COUNTER(ivar_get_miss),
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COUNTER(ivar_set_hit),
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COUNTER(ivar_set_miss),
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COUNTER(ivar_get),
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COUNTER(ivar_set),
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RB_DEBUG_COUNTER_MAX
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#undef COUNTER
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};
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#if USE_DEBUG_COUNTER
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#include "ruby/ruby.h"
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extern size_t rb_debug_counter[RB_DEBUG_COUNTER_MAX + 1];
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inline static int
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rb_debug_counter_add(enum rb_debug_counter_type type, int add, int cond)
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{
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if (cond) {
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rb_debug_counter[(int)type] += add;
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}
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return cond;
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}
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#define RB_DEBUG_COUNTER_INC(type) rb_debug_counter_add(RB_DEBUG_COUNTER_##type, 1, 1)
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#define RB_DEBUG_COUNTER_INC_UNLESS(type, cond) (!rb_debug_counter_add(RB_DEBUG_COUNTER_##type, 1, !(cond)))
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#define RB_DEBUG_COUNTER_INC_IF(type, cond) rb_debug_counter_add(RB_DEBUG_COUNTER_##type, 1, (cond))
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#else
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#define RB_DEBUG_COUNTER_INC(type) ((void)0)
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#define RB_DEBUG_COUNTER_INC_UNLESS(type, cond) (cond)
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#define RB_DEBUG_COUNTER_INC_IF(type, cond) (cond)
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#endif
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#endif /* RUBY_DEBUG_COUNTER_H */
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