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comparison src/share/vm/memory/tenuredGeneration.cpp @ 1888:a7214d79fcf1

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6896603: CMS/GCH: collection_attempt_is_safe() ergo should use more recent data Summary: Deprecated HandlePromotionFailure, removing the ability to turn off that feature, did away with one epoch look-ahead when deciding if a scavenge is likely to fail, relying on current data. Reviewed-by: jmasa, johnc, poonam
author ysr
date Sat, 23 Oct 2010 23:03:49 -0700
parents c18cbe5936b8
children f95d63e2154a
comparison
equal deleted inserted replaced
1887:cd3ef3fd20dd 1888:a7214d79fcf1
417 #else // SERIALGC 417 #else // SERIALGC
418 void TenuredGeneration::retire_alloc_buffers_before_full_gc() {} 418 void TenuredGeneration::retire_alloc_buffers_before_full_gc() {}
419 void TenuredGeneration::verify_alloc_buffers_clean() {} 419 void TenuredGeneration::verify_alloc_buffers_clean() {}
420 #endif // SERIALGC 420 #endif // SERIALGC
421 421
422 bool TenuredGeneration::promotion_attempt_is_safe( 422 bool TenuredGeneration::promotion_attempt_is_safe(size_t max_promotion_in_bytes) const {
423 size_t max_promotion_in_bytes, 423 size_t available = max_contiguous_available();
424 bool younger_handles_promotion_failure) const { 424 size_t av_promo = (size_t)gc_stats()->avg_promoted()->padded_average();
425 425 bool res = (available >= av_promo) || (available >= max_promotion_in_bytes);
426 bool result = max_contiguous_available() >= max_promotion_in_bytes; 426 if (PrintGC && Verbose) {
427 427 gclog_or_tty->print_cr(
428 if (younger_handles_promotion_failure && !result) { 428 "Tenured: promo attempt is%s safe: available("SIZE_FORMAT") %s av_promo("SIZE_FORMAT"),"
429 result = max_contiguous_available() >= 429 "max_promo("SIZE_FORMAT")",
430 (size_t) gc_stats()->avg_promoted()->padded_average(); 430 res? "":" not", available, res? ">=":"<",
431 if (PrintGC && Verbose && result) { 431 av_promo, max_promotion_in_bytes);
432 gclog_or_tty->print_cr("TenuredGeneration::promotion_attempt_is_safe" 432 }
433 " contiguous_available: " SIZE_FORMAT 433 return res;
434 " avg_promoted: " SIZE_FORMAT, 434 }
435 max_contiguous_available(),
436 gc_stats()->avg_promoted()->padded_average());
437 }
438 } else {
439 if (PrintGC && Verbose) {
440 gclog_or_tty->print_cr("TenuredGeneration::promotion_attempt_is_safe"
441 " contiguous_available: " SIZE_FORMAT
442 " promotion_in_bytes: " SIZE_FORMAT,
443 max_contiguous_available(), max_promotion_in_bytes);
444 }
445 }
446 return result;
447 }