369 }
370 #endif // INCLUDE_ALL_GCS
371
372 Flag::Error ParGCStridesPerThreadConstraintFunc(uintx value, bool verbose) {
373 #if INCLUDE_ALL_GCS
374 if (UseConcMarkSweepGC && (value > ((uintx)max_jint / (uintx)ParallelGCThreads))) {
375 CommandLineError::print(verbose,
376 "ParGCStridesPerThread (" UINTX_FORMAT ") must be "
377 "less than or equal to ergonomic maximum (" UINTX_FORMAT ")\n",
378 value, ((uintx)max_jint / (uintx)ParallelGCThreads));
379 return Flag::VIOLATES_CONSTRAINT;
380 }
381 #endif
382 return Flag::SUCCESS;
383 }
384
385 Flag::Error ParGCCardsPerStrideChunkConstraintFunc(intx value, bool verbose) {
386 #if INCLUDE_ALL_GCS
387 if (UseConcMarkSweepGC) {
388 // ParGCCardsPerStrideChunk shoule be compared with card table size.
389 // As CardTableModRefBS::_last_valid_index is 'protected', calculate it in a same way.
390 size_t heap_size = Universe::heap()->reserved_region().word_size();
391 size_t card_table_size = align_size_up(heap_size, CardTableModRefBS::card_size_in_words);
392 card_table_size /= (CardTableModRefBS::card_size_in_words + 1);
393 card_table_size -= 1;
394
395 if ((size_t)value > card_table_size) {
396 CommandLineError::print(verbose,
397 "ParGCCardsPerStrideChunk (" INTX_FORMAT ") must be "
398 "less than or equal to card table size (" SIZE_FORMAT ")\n",
399 value, card_table_size);
400 return Flag::VIOLATES_CONSTRAINT;
401 }
402
403 // If n_strides which is used with ParGCCardsPerStrideChunk is really large, we would face an overflow.
404 uintx n_strides = ParallelGCThreads * ParGCStridesPerThread;
405 uintx ergo_max = max_uintx / n_strides;
406 if ((uintx)value > ergo_max) {
407 CommandLineError::print(verbose,
408 "ParGCCardsPerStrideChunk (" INTX_FORMAT ") must be "
409 "less than or equal to ergonomic maximum (" UINTX_FORMAT ")\n",
410 value, ergo_max);
411 return Flag::VIOLATES_CONSTRAINT;
412 }
413 }
414 #endif
415 return Flag::SUCCESS;
416 }
417
418 Flag::Error CMSOldPLABMinConstraintFunc(size_t value, bool verbose) {
419 Flag::Error status = Flag::SUCCESS;
420
421 #if INCLUDE_ALL_GCS
422 if (UseConcMarkSweepGC) {
423 if (value > CMSOldPLABMax) {
|
369 }
370 #endif // INCLUDE_ALL_GCS
371
372 Flag::Error ParGCStridesPerThreadConstraintFunc(uintx value, bool verbose) {
373 #if INCLUDE_ALL_GCS
374 if (UseConcMarkSweepGC && (value > ((uintx)max_jint / (uintx)ParallelGCThreads))) {
375 CommandLineError::print(verbose,
376 "ParGCStridesPerThread (" UINTX_FORMAT ") must be "
377 "less than or equal to ergonomic maximum (" UINTX_FORMAT ")\n",
378 value, ((uintx)max_jint / (uintx)ParallelGCThreads));
379 return Flag::VIOLATES_CONSTRAINT;
380 }
381 #endif
382 return Flag::SUCCESS;
383 }
384
385 Flag::Error ParGCCardsPerStrideChunkConstraintFunc(intx value, bool verbose) {
386 #if INCLUDE_ALL_GCS
387 if (UseConcMarkSweepGC) {
388 // ParGCCardsPerStrideChunk shoule be compared with card table size.
389 size_t heap_size = Universe::heap()->reserved_region().word_size();
390 CardTableModRefBS* bs = (CardTableModRefBS*)GenCollectedHeap::heap()->rem_set()->bs();
391 size_t card_table_size = bs->cards_required(heap_size) - 1; // Valid card table size
392
393 if ((size_t)value > card_table_size) {
394 CommandLineError::print(verbose,
395 "ParGCCardsPerStrideChunk (" INTX_FORMAT ") is too large for the heap size and "
396 "must be less than or equal to card table size (" SIZE_FORMAT ")\n",
397 value, card_table_size);
398 return Flag::VIOLATES_CONSTRAINT;
399 }
400
401 // ParGCCardsPerStrideChunk is used with n_strides(ParallelGCThreads*ParGCStridesPerThread)
402 // from CardTableModRefBSForCTRS::process_stride(). However, ParGCStridesPerThread is already checked
403 // not to make an overflow with ParallelGCThreads from its constraint function.
404 uintx n_strides = ParallelGCThreads * ParGCStridesPerThread;
405 uintx ergo_max = max_uintx / n_strides;
406 if ((uintx)value > ergo_max) {
407 CommandLineError::print(verbose,
408 "ParGCCardsPerStrideChunk (" INTX_FORMAT ") must be "
409 "less than or equal to ergonomic maximum (" UINTX_FORMAT ")\n",
410 value, ergo_max);
411 return Flag::VIOLATES_CONSTRAINT;
412 }
413 }
414 #endif
415 return Flag::SUCCESS;
416 }
417
418 Flag::Error CMSOldPLABMinConstraintFunc(size_t value, bool verbose) {
419 Flag::Error status = Flag::SUCCESS;
420
421 #if INCLUDE_ALL_GCS
422 if (UseConcMarkSweepGC) {
423 if (value > CMSOldPLABMax) {
|