/*
* Copyright (c) 2016, 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
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package gc.g1.plab.lib;
import java.util.Arrays;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Scanner;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;
/**
* LogParser class parses VM output to get PLAB and ConsumptionStats values.
*
* Typical GC log with PLAB statistics (options - -Xlog:gc=debug,gc+plab=debug) looks like:
*
* [0.330s][debug][gc,plab ] GC(0) Young PLAB allocation: allocated: 1825632B, wasted: 29424B, unused: 2320B, used: 1793888B, undo waste: 0B,
* [0.330s][debug][gc,plab ] GC(0) Young other allocation: region end waste: 0B, regions filled: 2, direct allocated: 271520B, failure used: 0B, failure wasted: 0B
* [0.330s][debug][gc,plab ] GC(0) Young sizing: calculated: 358776B, actual: 358776B
* [0.330s][debug][gc,plab ] GC(0) Old PLAB allocation: allocated: 427248B, wasted: 592B, unused: 368584B, used: 58072B, undo waste: 0B,
* [0.330s][debug][gc,plab ] GC(0) Old other allocation: region end waste: 0B, regions filled: 1, direct allocated: 41704B, failure used: 0B, failure wasted: 0B
* [0.330s][debug][gc,plab ] GC(0) Old sizing: calculated: 11608B, actual: 11608B
*/
final public class LogParser {
/**
* Type of parsed log element.
*/
public static enum ReportType {
SURVIVOR_STATS,
OLD_STATS
}
private final String log;
// Contains Map of PLAB statistics for given log.
private final PlabReport report;
// GC ID
private static final Pattern GC_ID_PATTERN = Pattern.compile("\\[gc,plab\\s*\\] GC\\((\\d+)\\)");
// Pattern for extraction pair <name>: <numeric value>
private static final Pattern PAIRS_PATTERN = Pattern.compile("\\w* \\w+:\\s+\\d+");
/**
* Construct LogParser object, parse log file with PLAB statistics and store it into report.
*
* @param log - VM Output
*/
public LogParser(String log) {
if (log == null) {
throw new IllegalArgumentException("Parameter log should not be null.");
}
this.log = log;
report = parseLines();
}
/**
* @return log which was processed
*/
public String getLog() {
return log;
}
/**
* Returns the GC log entries for Survivor and Old stats.
* The entries are represented as a map of gcID to the StatMap.
*
* @return The log entries for the Survivor and Old stats.
*/
public PlabReport getEntries() {
return report;
}
private PlabReport parseLines() throws NumberFormatException {
Scanner lineScanner = new Scanner(log);
PlabReport plabReport = new PlabReport();
Optional<Long> gc_id;
while (lineScanner.hasNextLine()) {
String line = lineScanner.nextLine();
gc_id = getGcId(line, GC_ID_PATTERN);
if (gc_id.isPresent()) {
Matcher matcher = PAIRS_PATTERN.matcher(line);
if (matcher.find()) {
if (!plabReport.containsKey(gc_id.get())) {
plabReport.put(gc_id.get(), new PlabGCStatistics());
}
ReportType reportType = line.contains("Young") ? ReportType.SURVIVOR_STATS : ReportType.OLD_STATS;
PlabGCStatistics gcStat = plabReport.get(gc_id.get());
if (!gcStat.containsKey(reportType)) {
gcStat.put(reportType, new PlabInfo());
}
// Extract all pairs from log.
PlabInfo plabInfo = gcStat.get(reportType);
do {
String pair = matcher.group();
String[] nameValue = pair.replaceAll(": ", ":").split(":");
plabInfo.put(nameValue[0].trim(), Long.parseLong(nameValue[1]));
} while (matcher.find());
}
}
}
return plabReport;
}
private static Optional<Long> getGcId(String line, Pattern pattern) {
Matcher number = pattern.matcher(line);
if (number.find()) {
return Optional.of(Long.parseLong(number.group(1)));
}
return Optional.empty();
}
/**
* Extracts GC ID from log.
*
* @param line - one line of log.
* @return GC ID
*/
public static Long getGcIdFromLine(String line, Pattern pattern) {
Optional<Long> gcId = getGcId(line, pattern);
if (!gcId.isPresent()) {
System.out.println(line);
throw new RuntimeException("Cannot find GC ID in log.");
}
return gcId.get();
}
/**
* Returns Map<Long,PlabStatistics> which contains specified statistics for specified gc ids.
* @param specifiedGcId gc id to get
* @param type PLAB type
* @param fieldsName name of fields in PlabStatistics
* @return
**/
public Map<Long, PlabInfo> getSpecifiedStats(List<Long> specifiedGcId, LogParser.ReportType type, List<String> fieldsName) {
return getSpecifiedStats(specifiedGcId, type, fieldsName, true);
}
/**
* Returns PlabStatistics for specified GC ID.
* @param specifiedGcId
* @param type type of statistics
* @param fieldsName name of fields in PlabStatistics
* @return
**/
public PlabInfo getSpecifiedStats(long specifiedGcId, LogParser.ReportType type, List<String> fieldsName) {
PlabInfo info = getSpecifiedStats(Arrays.asList(specifiedGcId), type, fieldsName, true).get(specifiedGcId);
if (info == null) {
System.out.println(log);
throw new RuntimeException("Cannot find PLAB statistics in log ( GC_ID=" + specifiedGcId + " type=" + type + " )");
}
return info;
}
/**
* Returns Map<Long,PlabStatistics> which contains specified statistics. Filters out specified gc ids.
* @param specifiedGcIdForExclude
* @param type
* @param fieldsName
* @return
**/
public Map<Long, PlabInfo> getExcludedSpecifiedStats(List<Long> specifiedGcIdForExclude, LogParser.ReportType type, List<String> fieldsName) {
return getSpecifiedStats(specifiedGcIdForExclude, type, fieldsName, false);
}
private Map<Long, PlabInfo> getSpecifiedStats(List<Long> gcIds, LogParser.ReportType type, List<String> fieldNames, boolean extractId) {
return new HashMap<>(
getEntries().entryStream()
.filter(gcLogItem -> extractId == gcIds.contains(gcLogItem.getKey()))
.collect(Collectors.toMap(gcLogItem -> gcLogItem.getKey(),
gcLogItem -> gcLogItem.getValue().get(type).filter(fieldNames)
)
)
);
}
}