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Tweaked GC thresholds

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Justin Ethier 2015-12-10 21:48:19 -05:00
parent be9a07551e
commit 29e6cb38e9
1 changed files with 18 additions and 15 deletions
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33
gc.c
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@ -821,13 +821,15 @@ void gc_mut_cooperate(gc_thread_data *thd, int buf_len)
}
#endif
// Initiate collection cycle if free space is too low
// Initiate collection cycle if free space is too low.
// Threshold is intentially low because we have to go through an
// entire handshake/trace/sweep cycle, ideally without growing heap.
if (stage == STAGE_RESTING &&
(cached_heap_free_size < (cached_heap_total_size * 0.10))){
fprintf(stdout, "Less than 10%% of the heap is free, initiating collector\n"); // Temporary debug line
ATOMIC_SET_IF_EQ(&gc_stage,
STAGE_RESTING,
STAGE_CLEAR_OR_MARKING);
(cached_heap_free_size < (cached_heap_total_size * 0.50))){
#if GC_DEBUG_TRACE
fprintf(stdout, "Less than 50%% of the heap is free, initiating collector\n");
#endif
ATOMIC_SET_IF_EQ(&gc_stage, STAGE_RESTING, STAGE_CLEAR_OR_MARKING);
}
}
@ -1102,9 +1104,9 @@ void gc_collector()
{
int old_clear, old_mark;
size_t freed = 0, max_freed = 0, total_size, total_free;
//#if GC_DEBUG_TRACE
#if GC_DEBUG_TRACE
time_t sweep_start = time(NULL);
//#endif
#endif
//clear :
ATOMIC_SET_IF_EQ(&gc_stage, STAGE_RESTING, STAGE_CLEAR_OR_MARKING);
// exchange values of markColor and clearColor
@ -1148,16 +1150,17 @@ fprintf(stderr, "DEBUG - after wait_handshake async\n");
total_free = cached_heap_free_size; //gc_heap_total_free_size(gc_get_heap());
if (total_free < (total_size * 0.10)) {
fprintf(stdout, "JAE TODO: may need to rethink this growth strategy\n");
fprintf(stdout, "Less than 10%% of the heap is free, growing it\n",
#if GC_DEBUG_TRACE
fprintf(stdout, "Less than 10%% of the heap is free, growing it\n",
total_free, total_size);
#endif
gc_grow_heap(gc_get_heap(), 0, 0);
}
//#if GC_DEBUG_TRACE
#if GC_DEBUG_TRACE
fprintf(stderr, "sweep done, total_size = %d, total_free = %d, freed = %d, max_freed = %d, elapsed = %ld\n",
total_size, total_free,
freed, max_freed, time(NULL) - sweep_start);
//#endif
#endif
ATOMIC_SET_IF_EQ(&gc_stage, STAGE_SWEEPING, STAGE_RESTING);
}
@ -1166,9 +1169,9 @@ void *collector_main(void *arg)
int stage;
struct timespec tim;
tim.tv_sec = 0;
JAE TODO: this is still not good enough, seems memory grows still grows fast with this.
alternatively, may want to consider shrinking the heap if possible after a collection, if it is
sparse enough (would be difficult to do without relocations, though
//JAE TODO: this is still not good enough, seems memory grows still grows fast with this.
//alternatively, may want to consider shrinking the heap if possible after a collection, if it is
//sparse enough (would be difficult to do without relocations, though
tim.tv_nsec = 100 * NANOSECONDS_PER_MILLISECOND;
while (1) {
stage = ATOMIC_GET(&gc_stage);