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support GC.stat(:time) take 2

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This commit is contained in:
Koichi Sasada 2021-08-19 16:14:46 +09:00
parent b08dacfea3
commit 349a179782
Notes: git 2021-11-19 08:32:30 +09:00
1 changed files with 51 additions and 0 deletions
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51
gc.c
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@ -807,6 +807,8 @@ typedef struct rb_objspace {
size_t total_freed_objects;
size_t total_allocated_pages;
size_t total_freed_pages;
size_t total_time_ns;
struct timespec start_time;
} profile;
struct gc_list *global_list;
@ -9163,11 +9165,56 @@ gc_enter_count(enum gc_enter_event event)
}
}
#define MEASURE_GC 1
static bool
gc_enter_event_measure_p(enum gc_enter_event event)
{
if (!MEASURE_GC) return false;
switch (event) {
case gc_enter_event_start:
case gc_enter_event_mark_continue:
case gc_enter_event_sweep_continue:
case gc_enter_event_rest:
return true;
case gc_enter_event_finalizer:
case gc_enter_event_rb_memerror:
return false;
}
}
static void
gc_enter_clock(rb_objspace_t *objspace, enum gc_enter_event event)
{
if (gc_enter_event_measure_p(event)) {
clock_gettime(CLOCK_MONOTONIC, &objspace->profile.start_time);
}
}
static void
gc_exit_clock(rb_objspace_t *objspace, enum gc_enter_event event)
{
if (gc_enter_event_measure_p(event)) {
struct timespec end_time;
clock_gettime(CLOCK_MONOTONIC, &end_time);
if (end_time.tv_sec < objspace->profile.start_time.tv_sec) {
return; // ignore
}
size_t ns = (end_time.tv_sec - objspace->profile.start_time.tv_sec) * 1000 * 1000 * 1000 + end_time.tv_nsec - objspace->profile.start_time.tv_nsec;
objspace->profile.total_time_ns += ns;
}
}
static inline void
gc_enter(rb_objspace_t *objspace, enum gc_enter_event event, unsigned int *lock_lev)
{
RB_VM_LOCK_ENTER_LEV(lock_lev);
gc_enter_clock(objspace, event);
switch (event) {
case gc_enter_event_rest:
if (!is_marking(objspace)) break;
@ -9206,6 +9253,7 @@ gc_exit(rb_objspace_t *objspace, enum gc_enter_event event, unsigned int *lock_l
during_gc = FALSE;
mjit_gc_exit_hook();
gc_exit_clock(objspace, event);
RB_VM_LOCK_LEAVE_LEV(lock_lev);
}
@ -10444,6 +10492,7 @@ gc_latest_gc_info(rb_execution_context_t *ec, VALUE self, VALUE arg)
enum gc_stat_sym {
gc_stat_sym_count,
gc_stat_sym_time,
gc_stat_sym_heap_allocated_pages,
gc_stat_sym_heap_sorted_length,
gc_stat_sym_heap_allocatable_pages,
@ -10492,6 +10541,7 @@ setup_gc_stat_symbols(void)
if (gc_stat_symbols[0] == 0) {
#define S(s) gc_stat_symbols[gc_stat_sym_##s] = ID2SYM(rb_intern_const(#s))
S(count);
S(time);
S(heap_allocated_pages);
S(heap_sorted_length);
S(heap_allocatable_pages);
@ -10558,6 +10608,7 @@ gc_stat_internal(VALUE hash_or_sym)
rb_hash_aset(hash, gc_stat_symbols[gc_stat_sym_##name], SIZET2NUM(attr));
SET(count, objspace->profile.count);
SET(time, objspace->profile.total_time_ns / (1000 * 1000) /* ns -> ms */);
/* implementation dependent counters */
SET(heap_allocated_pages, heap_allocated_pages);