365 return Flag::VIOLATES_CONSTRAINT;
366 } else {
367 return Flag::SUCCESS;
368 }
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 CMSOldPLABMinConstraintFunc(size_t value, bool verbose) {
386 Flag::Error status = Flag::SUCCESS;
387
388 #if INCLUDE_ALL_GCS
389 if (UseConcMarkSweepGC) {
390 if (value > CMSOldPLABMax) {
391 CommandLineError::print(verbose,
392 "CMSOldPLABMin (" SIZE_FORMAT ") must be "
393 "less than or equal to CMSOldPLABMax (" SIZE_FORMAT ")\n",
394 value, CMSOldPLABMax);
395 return Flag::VIOLATES_CONSTRAINT;
396 }
397 status = MaxPLABSizeBounds("CMSOldPLABMin", value, verbose);
398 }
399 #endif
400 return status;
401 }
402
403 Flag::Error CMSOldPLABMaxConstraintFunc(size_t value, bool verbose) {
404 Flag::Error status = Flag::SUCCESS;
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365 return Flag::VIOLATES_CONSTRAINT;
366 } else {
367 return Flag::SUCCESS;
368 }
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) {
424 CommandLineError::print(verbose,
425 "CMSOldPLABMin (" SIZE_FORMAT ") must be "
426 "less than or equal to CMSOldPLABMax (" SIZE_FORMAT ")\n",
427 value, CMSOldPLABMax);
428 return Flag::VIOLATES_CONSTRAINT;
429 }
430 status = MaxPLABSizeBounds("CMSOldPLABMin", value, verbose);
431 }
432 #endif
433 return status;
434 }
435
436 Flag::Error CMSOldPLABMaxConstraintFunc(size_t value, bool verbose) {
437 Flag::Error status = Flag::SUCCESS;
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