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6484965: G1: piggy-back liveness accounting phase on marking

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Remove the separate counting phase of concurrent marking by tracking the amount of marked bytes and the cards spanned by marked objects in marking task/worker thread local data structures, which are updated as individual objects are marked.

Reviewed-by: brutisso, tonyp
This commit is contained in:
John Cuthbertson 2012-01-12 00:06:47 -08:00
parent 8861552c07
commit 0fa6fc2279
10 changed files with 1022 additions and 268 deletions
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32
hotspot/src/share/vm/gc_implementation/g1/concurrentMarkThread.cpp
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@ -1,5 +1,5 @@
/*
* Copyright (c) 2001, 2011, Oracle and/or its affiliates. All rights reserved.
* Copyright (c) 2001, 2012, Oracle and/or its affiliates. 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
@ -44,9 +44,7 @@ ConcurrentMarkThread::ConcurrentMarkThread(ConcurrentMark* cm) :
_started(false),
_in_progress(false),
_vtime_accum(0.0),
_vtime_mark_accum(0.0),
_vtime_count_accum(0.0)
{
_vtime_mark_accum(0.0) {
create_and_start();
}
@ -148,36 +146,12 @@ void ConcurrentMarkThread::run() {
}
} while (cm()->restart_for_overflow());
double counting_start_time = os::elapsedVTime();
if (!cm()->has_aborted()) {
double count_start_sec = os::elapsedTime();
if (PrintGC) {
gclog_or_tty->date_stamp(PrintGCDateStamps);
gclog_or_tty->stamp(PrintGCTimeStamps);
gclog_or_tty->print_cr("[GC concurrent-count-start]");
}
_sts.join();
_cm->calcDesiredRegions();
_sts.leave();
if (!cm()->has_aborted()) {
double count_end_sec = os::elapsedTime();
if (PrintGC) {
gclog_or_tty->date_stamp(PrintGCDateStamps);
gclog_or_tty->stamp(PrintGCTimeStamps);
gclog_or_tty->print_cr("[GC concurrent-count-end, %1.7lf]",
count_end_sec - count_start_sec);
}
}
}
double end_time = os::elapsedVTime();
_vtime_count_accum += (end_time - counting_start_time);
// Update the total virtual time before doing this, since it will try
// to measure it to get the vtime for this marking. We purposely
// neglect the presumably-short "completeCleanup" phase here.
_vtime_accum = (end_time - _vtime_start);
if (!cm()->has_aborted()) {
if (g1_policy->adaptive_young_list_length()) {
double now = os::elapsedTime();