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6819061: G1: eliminate serial Other times that are proportional to the collection set length

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6871109: G1: remove the concept of the scan only prefix

Removed scan only regions and associated code. The young portion of the collection set is now constructed incrementally - when a young region is retired as the current allocation region it is added to the collection set.

Reviewed-by: apetrusenko, iveresov, tonyp
This commit is contained in:
John Cuthbertson 2010-04-22 10:02:38 -07:00
parent db6aad1e4e
commit b1867e0dd5
12 changed files with 895 additions and 1013 deletions
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9
hotspot/src/share/vm/gc_implementation/g1/concurrentG1RefineThread.cpp
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@ -1,5 +1,5 @@
/*
* Copyright 2001-2009 Sun Microsystems, Inc. All Rights Reserved.
* Copyright 2001-2010 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
@ -69,9 +69,9 @@ void ConcurrentG1RefineThread::sample_young_list_rs_lengths() {
G1CollectorPolicy* g1p = g1h->g1_policy();
if (g1p->adaptive_young_list_length()) {
int regions_visited = 0;
g1h->young_list_rs_length_sampling_init();
while (g1h->young_list_rs_length_sampling_more()) {
g1h->young_list_rs_length_sampling_next();
g1h->young_list()->rs_length_sampling_init();
while (g1h->young_list()->rs_length_sampling_more()) {
g1h->young_list()->rs_length_sampling_next();
++regions_visited;
// we try to yield every time we visit 10 regions
@ -162,6 +162,7 @@ void ConcurrentG1RefineThread::run() {
if (_worker_id >= cg1r()->worker_thread_num()) {
run_young_rs_sampling();
terminate();
return;
}
_vtime_start = os::elapsedVTime();