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src/share/vm/gc_implementation/g1/g1Log.cpp@7383557659bd (annotated)

src/share/vm/gc_implementation/g1/g1Log.cpp

Tue, 21 Aug 2012 14:10:39 -0700

author

johnc

date

Tue, 21 Aug 2012 14:10:39 -0700

changeset 3998

7383557659bd

parent 0

f90c822e73f8

permissions

-rw-r--r--

7185699: G1: Prediction model discrepancies
Summary: Correct the result value of G1CollectedHeap::pending_card_num(). Change the code that calculates the GC efficiency of a non-young heap region to use historical data from mixed GCs and the actual number of live bytes when predicting how long it would take to collect the region. Changes were also reviewed by Thomas Schatzl.
Reviewed-by: azeemj, brutisso

aoqi@0	1	/*
aoqi@0	2	* Copyright (c) 2012, Oracle and/or its affiliates. All rights reserved.
aoqi@0	3	* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
aoqi@0	4	*
aoqi@0	5	* This code is free software; you can redistribute it and/or modify it
aoqi@0	6	* under the terms of the GNU General Public License version 2 only, as
aoqi@0	7	* published by the Free Software Foundation.
aoqi@0	8	*
aoqi@0	9	* This code is distributed in the hope that it will be useful, but WITHOUT
aoqi@0	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
aoqi@0	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
aoqi@0	12	* version 2 for more details (a copy is included in the LICENSE file that
aoqi@0	13	* accompanied this code).
aoqi@0	14	*
aoqi@0	15	* You should have received a copy of the GNU General Public License version
aoqi@0	16	* 2 along with this work; if not, write to the Free Software Foundation,
aoqi@0	17	* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
aoqi@0	18	*
aoqi@0	19	* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
aoqi@0	20	* or visit www.oracle.com if you need additional information or have any
aoqi@0	21	* questions.
aoqi@0	22	*
aoqi@0	23	*/
aoqi@0	24
aoqi@0	25	#include "precompiled.hpp"
aoqi@0	26	#include "gc_implementation/g1/g1_globals.hpp"
aoqi@0	27	#include "gc_implementation/g1/g1Log.hpp"
aoqi@0	28	#include "runtime/globals.hpp"
aoqi@0	29
aoqi@0	30	G1Log::LogLevel G1Log::_level = G1Log::LevelNone;
aoqi@0	31
aoqi@0	32	// If G1LogLevel has not been set up we will use the values of PrintGC
aoqi@0	33	// and PrintGCDetails for the logging level.
aoqi@0	34	// - PrintGC maps to "fine".
aoqi@0	35	// - PrintGCDetails maps to "finer".
aoqi@0	36	void G1Log::init() {
aoqi@0	37	if (G1LogLevel != NULL && G1LogLevel[0] != '\0') {
aoqi@0	38	if (strncmp("none", G1LogLevel, 4) == 0 && G1LogLevel[4] == '\0') {
aoqi@0	39	_level = LevelNone;
aoqi@0	40	} else if (strncmp("fine", G1LogLevel, 4) == 0 && G1LogLevel[4] == '\0') {
aoqi@0	41	_level = LevelFine;
aoqi@0	42	} else if (strncmp("finer", G1LogLevel, 5) == 0 && G1LogLevel[5] == '\0') {
aoqi@0	43	_level = LevelFiner;
aoqi@0	44	} else if (strncmp("finest", G1LogLevel, 6) == 0 && G1LogLevel[6] == '\0') {
aoqi@0	45	_level = LevelFinest;
aoqi@0	46	} else {
aoqi@0	47	warning("Unknown logging level '%s', should be one of 'fine', 'finer' or 'finest'.", G1LogLevel);
aoqi@0	48	}
aoqi@0	49	} else {
aoqi@0	50	if (PrintGCDetails) {
aoqi@0	51	_level = LevelFiner;
aoqi@0	52	} else if (PrintGC) {
aoqi@0	53	_level = LevelFine;
aoqi@0	54	}
aoqi@0	55	}
aoqi@0	56	}