20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26
27 #include "gc/shenandoah/heuristics/shenandoahStaticHeuristics.hpp"
28 #include "gc/shenandoah/shenandoahCollectionSet.hpp"
29 #include "gc/shenandoah/shenandoahFreeSet.hpp"
30 #include "gc/shenandoah/shenandoahHeapRegion.hpp"
31 #include "logging/log.hpp"
32 #include "logging/logTag.hpp"
33
34 ShenandoahStaticHeuristics::ShenandoahStaticHeuristics() : ShenandoahHeuristics() {
35 SHENANDOAH_ERGO_ENABLE_FLAG(ExplicitGCInvokesConcurrent);
36 SHENANDOAH_ERGO_ENABLE_FLAG(ShenandoahImplicitGCInvokesConcurrent);
37
38 // Final configuration checks
39 SHENANDOAH_CHECK_FLAG_SET(ShenandoahLoadRefBarrier);
40 SHENANDOAH_CHECK_FLAG_SET(ShenandoahSATBBarrier);
41 SHENANDOAH_CHECK_FLAG_SET(ShenandoahCASBarrier);
42 SHENANDOAH_CHECK_FLAG_SET(ShenandoahCloneBarrier);
43 }
44
45 ShenandoahStaticHeuristics::~ShenandoahStaticHeuristics() {}
46
47 bool ShenandoahStaticHeuristics::should_start_gc() const {
48 ShenandoahHeap* heap = ShenandoahHeap::heap();
49
50 size_t capacity = heap->max_capacity();
51 size_t available = heap->free_set()->available();
52 size_t threshold_available = capacity / 100 * ShenandoahMinFreeThreshold;
53
54 if (available < threshold_available) {
55 log_info(gc)("Trigger: Free (" SIZE_FORMAT "%s) is below minimum threshold (" SIZE_FORMAT "%s)",
56 byte_size_in_proper_unit(available), proper_unit_for_byte_size(available),
57 byte_size_in_proper_unit(threshold_available), proper_unit_for_byte_size(threshold_available));
58 return true;
59 }
60 return ShenandoahHeuristics::should_start_gc();
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20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
24
25 #include "precompiled.hpp"
26
27 #include "gc/shenandoah/heuristics/shenandoahStaticHeuristics.hpp"
28 #include "gc/shenandoah/shenandoahCollectionSet.hpp"
29 #include "gc/shenandoah/shenandoahFreeSet.hpp"
30 #include "gc/shenandoah/shenandoahHeapRegion.hpp"
31 #include "logging/log.hpp"
32 #include "logging/logTag.hpp"
33
34 ShenandoahStaticHeuristics::ShenandoahStaticHeuristics() : ShenandoahHeuristics() {
35 SHENANDOAH_ERGO_ENABLE_FLAG(ExplicitGCInvokesConcurrent);
36 SHENANDOAH_ERGO_ENABLE_FLAG(ShenandoahImplicitGCInvokesConcurrent);
37
38 // Final configuration checks
39 SHENANDOAH_CHECK_FLAG_SET(ShenandoahLoadRefBarrier);
40 SHENANDOAH_CHECK_FLAG_SET(ShenandoahSATBBarrier || ShenandoahStoreValEnqueueBarrier);
41 SHENANDOAH_CHECK_FLAG_SET(ShenandoahCASBarrier);
42 SHENANDOAH_CHECK_FLAG_SET(ShenandoahCloneBarrier);
43 }
44
45 ShenandoahStaticHeuristics::~ShenandoahStaticHeuristics() {}
46
47 bool ShenandoahStaticHeuristics::should_start_gc() const {
48 ShenandoahHeap* heap = ShenandoahHeap::heap();
49
50 size_t capacity = heap->max_capacity();
51 size_t available = heap->free_set()->available();
52 size_t threshold_available = capacity / 100 * ShenandoahMinFreeThreshold;
53
54 if (available < threshold_available) {
55 log_info(gc)("Trigger: Free (" SIZE_FORMAT "%s) is below minimum threshold (" SIZE_FORMAT "%s)",
56 byte_size_in_proper_unit(available), proper_unit_for_byte_size(available),
57 byte_size_in_proper_unit(threshold_available), proper_unit_for_byte_size(threshold_available));
58 return true;
59 }
60 return ShenandoahHeuristics::should_start_gc();
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