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8278893: Parallel: Remove GCWorkerDelayMillis

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Reviewed-by: ayang, mli
This commit is contained in:
Thomas Schatzl 2021-12-21 09:51:21 +00:00
parent 517967284c
commit ff5d41762d
3 changed files with 0 additions and 21 deletions
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3
src/hotspot/share/gc/parallel/parallel_globals.hpp
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@ -55,9 +55,6 @@
"limiter (a number between 0-100)") \ "limiter (a number between 0-100)") \
range(0, 100) \ range(0, 100) \
\ \
develop(uintx, GCWorkerDelayMillis, 0, \
"Delay in scheduling GC workers (in milliseconds)") \
\
product(bool, PSChunkLargeArrays, true, \ product(bool, PSChunkLargeArrays, true, \
"Process large arrays in chunks") "Process large arrays in chunks")

11
src/hotspot/share/gc/parallel/psCardTable.cpp
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@ -165,7 +165,6 @@ void PSCardTable::scavenge_contents_parallel(ObjectStartArray* start_array,
uint stripe_number, uint stripe_number,
uint stripe_total) { uint stripe_total) {
int ssize = 128; // Naked constant! Work unit = 64k. int ssize = 128; // Naked constant! Work unit = 64k.
int dirty_card_count = 0;
// It is a waste to get here if empty. // It is a waste to get here if empty.
assert(sp->bottom() < sp->top(), "Should not be called if empty"); assert(sp->bottom() < sp->top(), "Should not be called if empty");
@ -195,16 +194,6 @@ void PSCardTable::scavenge_contents_parallel(ObjectStartArray* start_array,
HeapWord* slice_start = addr_for(worker_start_card); HeapWord* slice_start = addr_for(worker_start_card);
HeapWord* slice_end = MIN2((HeapWord*) sp_top, addr_for(worker_end_card)); HeapWord* slice_end = MIN2((HeapWord*) sp_top, addr_for(worker_end_card));
#ifdef ASSERT
if (GCWorkerDelayMillis > 0) {
// Delay 1 worker so that it proceeds after all the work
// has been completed.
if (stripe_number < 2) {
os::naked_sleep(GCWorkerDelayMillis);
}
}
#endif
// If there are not objects starting within the chunk, skip it. // If there are not objects starting within the chunk, skip it.
if (!start_array->object_starts_in_range(slice_start, slice_end)) { if (!start_array->object_starts_in_range(slice_start, slice_end)) {
continue; continue;

7
src/hotspot/share/gc/parallel/psPromotionManager.inline.hpp
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@ -219,13 +219,6 @@ inline oop PSPromotionManager::copy_unmarked_to_survivor_space(oop o,
HeapWord* lab_base = old_gen()->allocate(OldPLABSize); HeapWord* lab_base = old_gen()->allocate(OldPLABSize);
if(lab_base != NULL) { if(lab_base != NULL) {
#ifdef ASSERT
// Delay the initialization of the promotion lab (plab).
// This exposes uninitialized plabs to card table processing.
if (GCWorkerDelayMillis > 0) {
os::naked_sleep(GCWorkerDelayMillis);
}
#endif
_old_lab.initialize(MemRegion(lab_base, OldPLABSize)); _old_lab.initialize(MemRegion(lab_base, OldPLABSize));
// Try the old lab allocation again. // Try the old lab allocation again.
new_obj = cast_to_oop(_old_lab.allocate(new_obj_size)); new_obj = cast_to_oop(_old_lab.allocate(new_obj_size));