145 assert_is_aligned(v, Metaspace::commit_alignment());
146
147 size_t old_capacity_until_GC = _capacity_until_GC;
148 size_t new_value = old_capacity_until_GC + v;
149
150 if (new_value < old_capacity_until_GC) {
151 // The addition wrapped around, set new_value to aligned max value.
152 new_value = align_down(max_uintx, Metaspace::commit_alignment());
153 }
154
155 if (new_value > MaxMetaspaceSize) {
156 if (can_retry != NULL) {
157 *can_retry = false;
158 }
159 return false;
160 }
161
162 if (can_retry != NULL) {
163 *can_retry = true;
164 }
165 size_t prev_value = Atomic::cmpxchg(new_value, &_capacity_until_GC, old_capacity_until_GC);
166
167 if (old_capacity_until_GC != prev_value) {
168 return false;
169 }
170
171 if (new_cap_until_GC != NULL) {
172 *new_cap_until_GC = new_value;
173 }
174 if (old_cap_until_GC != NULL) {
175 *old_cap_until_GC = old_capacity_until_GC;
176 }
177 return true;
178 }
179
180 size_t MetaspaceGC::dec_capacity_until_GC(size_t v) {
181 assert_is_aligned(v, Metaspace::commit_alignment());
182
183 return Atomic::sub(v, &_capacity_until_GC);
184 }
185
186 void MetaspaceGC::initialize() {
187 // Set the high-water mark to MaxMetapaceSize during VM initializaton since
188 // we can't do a GC during initialization.
189 _capacity_until_GC = MaxMetaspaceSize;
190 }
191
192 void MetaspaceGC::post_initialize() {
193 // Reset the high-water mark once the VM initialization is done.
194 _capacity_until_GC = MAX2(MetaspaceUtils::committed_bytes(), MetaspaceSize);
195 }
196
197 bool MetaspaceGC::can_expand(size_t word_size, bool is_class) {
198 // Check if the compressed class space is full.
199 if (is_class && Metaspace::using_class_space()) {
200 size_t class_committed = MetaspaceUtils::committed_bytes(Metaspace::ClassType);
201 if (class_committed + word_size * BytesPerWord > CompressedClassSpaceSize) {
202 log_trace(gc, metaspace, freelist)("Cannot expand %s metaspace by " SIZE_FORMAT " words (CompressedClassSpaceSize = " SIZE_FORMAT " words)",
203 (is_class ? "class" : "non-class"), word_size, CompressedClassSpaceSize / sizeof(MetaWord));
377
378 size_t MetaspaceUtils::free_in_vs_bytes() {
379 return free_in_vs_bytes(Metaspace::ClassType) + free_in_vs_bytes(Metaspace::NonClassType);
380 }
381
382 static void inc_stat_nonatomically(size_t* pstat, size_t words) {
383 assert_lock_strong(MetaspaceExpand_lock);
384 (*pstat) += words;
385 }
386
387 static void dec_stat_nonatomically(size_t* pstat, size_t words) {
388 assert_lock_strong(MetaspaceExpand_lock);
389 const size_t size_now = *pstat;
390 assert(size_now >= words, "About to decrement counter below zero "
391 "(current value: " SIZE_FORMAT ", decrement value: " SIZE_FORMAT ".",
392 size_now, words);
393 *pstat = size_now - words;
394 }
395
396 static void inc_stat_atomically(volatile size_t* pstat, size_t words) {
397 Atomic::add(words, pstat);
398 }
399
400 static void dec_stat_atomically(volatile size_t* pstat, size_t words) {
401 const size_t size_now = *pstat;
402 assert(size_now >= words, "About to decrement counter below zero "
403 "(current value: " SIZE_FORMAT ", decrement value: " SIZE_FORMAT ".",
404 size_now, words);
405 Atomic::sub(words, pstat);
406 }
407
408 void MetaspaceUtils::dec_capacity(Metaspace::MetadataType mdtype, size_t words) {
409 dec_stat_nonatomically(&_capacity_words[mdtype], words);
410 }
411 void MetaspaceUtils::inc_capacity(Metaspace::MetadataType mdtype, size_t words) {
412 inc_stat_nonatomically(&_capacity_words[mdtype], words);
413 }
414 void MetaspaceUtils::dec_used(Metaspace::MetadataType mdtype, size_t words) {
415 dec_stat_atomically(&_used_words[mdtype], words);
416 }
417 void MetaspaceUtils::inc_used(Metaspace::MetadataType mdtype, size_t words) {
418 inc_stat_atomically(&_used_words[mdtype], words);
419 }
420 void MetaspaceUtils::dec_overhead(Metaspace::MetadataType mdtype, size_t words) {
421 dec_stat_nonatomically(&_overhead_words[mdtype], words);
422 }
423 void MetaspaceUtils::inc_overhead(Metaspace::MetadataType mdtype, size_t words) {
424 inc_stat_nonatomically(&_overhead_words[mdtype], words);
425 }
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145 assert_is_aligned(v, Metaspace::commit_alignment());
146
147 size_t old_capacity_until_GC = _capacity_until_GC;
148 size_t new_value = old_capacity_until_GC + v;
149
150 if (new_value < old_capacity_until_GC) {
151 // The addition wrapped around, set new_value to aligned max value.
152 new_value = align_down(max_uintx, Metaspace::commit_alignment());
153 }
154
155 if (new_value > MaxMetaspaceSize) {
156 if (can_retry != NULL) {
157 *can_retry = false;
158 }
159 return false;
160 }
161
162 if (can_retry != NULL) {
163 *can_retry = true;
164 }
165 size_t prev_value = Atomic::cmpxchg(&_capacity_until_GC, old_capacity_until_GC, new_value);
166
167 if (old_capacity_until_GC != prev_value) {
168 return false;
169 }
170
171 if (new_cap_until_GC != NULL) {
172 *new_cap_until_GC = new_value;
173 }
174 if (old_cap_until_GC != NULL) {
175 *old_cap_until_GC = old_capacity_until_GC;
176 }
177 return true;
178 }
179
180 size_t MetaspaceGC::dec_capacity_until_GC(size_t v) {
181 assert_is_aligned(v, Metaspace::commit_alignment());
182
183 return Atomic::sub(&_capacity_until_GC, v);
184 }
185
186 void MetaspaceGC::initialize() {
187 // Set the high-water mark to MaxMetapaceSize during VM initializaton since
188 // we can't do a GC during initialization.
189 _capacity_until_GC = MaxMetaspaceSize;
190 }
191
192 void MetaspaceGC::post_initialize() {
193 // Reset the high-water mark once the VM initialization is done.
194 _capacity_until_GC = MAX2(MetaspaceUtils::committed_bytes(), MetaspaceSize);
195 }
196
197 bool MetaspaceGC::can_expand(size_t word_size, bool is_class) {
198 // Check if the compressed class space is full.
199 if (is_class && Metaspace::using_class_space()) {
200 size_t class_committed = MetaspaceUtils::committed_bytes(Metaspace::ClassType);
201 if (class_committed + word_size * BytesPerWord > CompressedClassSpaceSize) {
202 log_trace(gc, metaspace, freelist)("Cannot expand %s metaspace by " SIZE_FORMAT " words (CompressedClassSpaceSize = " SIZE_FORMAT " words)",
203 (is_class ? "class" : "non-class"), word_size, CompressedClassSpaceSize / sizeof(MetaWord));
377
378 size_t MetaspaceUtils::free_in_vs_bytes() {
379 return free_in_vs_bytes(Metaspace::ClassType) + free_in_vs_bytes(Metaspace::NonClassType);
380 }
381
382 static void inc_stat_nonatomically(size_t* pstat, size_t words) {
383 assert_lock_strong(MetaspaceExpand_lock);
384 (*pstat) += words;
385 }
386
387 static void dec_stat_nonatomically(size_t* pstat, size_t words) {
388 assert_lock_strong(MetaspaceExpand_lock);
389 const size_t size_now = *pstat;
390 assert(size_now >= words, "About to decrement counter below zero "
391 "(current value: " SIZE_FORMAT ", decrement value: " SIZE_FORMAT ".",
392 size_now, words);
393 *pstat = size_now - words;
394 }
395
396 static void inc_stat_atomically(volatile size_t* pstat, size_t words) {
397 Atomic::add(pstat, words);
398 }
399
400 static void dec_stat_atomically(volatile size_t* pstat, size_t words) {
401 const size_t size_now = *pstat;
402 assert(size_now >= words, "About to decrement counter below zero "
403 "(current value: " SIZE_FORMAT ", decrement value: " SIZE_FORMAT ".",
404 size_now, words);
405 Atomic::sub(pstat, words);
406 }
407
408 void MetaspaceUtils::dec_capacity(Metaspace::MetadataType mdtype, size_t words) {
409 dec_stat_nonatomically(&_capacity_words[mdtype], words);
410 }
411 void MetaspaceUtils::inc_capacity(Metaspace::MetadataType mdtype, size_t words) {
412 inc_stat_nonatomically(&_capacity_words[mdtype], words);
413 }
414 void MetaspaceUtils::dec_used(Metaspace::MetadataType mdtype, size_t words) {
415 dec_stat_atomically(&_used_words[mdtype], words);
416 }
417 void MetaspaceUtils::inc_used(Metaspace::MetadataType mdtype, size_t words) {
418 inc_stat_atomically(&_used_words[mdtype], words);
419 }
420 void MetaspaceUtils::dec_overhead(Metaspace::MetadataType mdtype, size_t words) {
421 dec_stat_nonatomically(&_overhead_words[mdtype], words);
422 }
423 void MetaspaceUtils::inc_overhead(Metaspace::MetadataType mdtype, size_t words) {
424 inc_stat_nonatomically(&_overhead_words[mdtype], words);
425 }
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