Mercurial > hg > release > thermostat-0.5
view numa/agent/src/main/java/com/redhat/thermostat/numa/agent/internal/NumaCollector.java @ 919:31c6026714f5
Send all numa-node data in one NumaStat.
Reviewed-by: omajid, jerboaa
Review-thread: http://icedtea.classpath.org/pipermail/thermostat/2013-January/005217.html
author | Roman Kennke <rkennke@redhat.com> |
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date | Fri, 18 Jan 2013 18:42:04 +0100 |
parents | 6815308bb362 |
children | 8a6697503832 |
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/* * Copyright 2013 Red Hat, Inc. * * This file is part of Thermostat. * * Thermostat is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published * by the Free Software Foundation; either version 2, or (at your * option) any later version. * * Thermostat 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 for more details. * * You should have received a copy of the GNU General Public License * along with Thermostat; see the file COPYING. If not see * <http://www.gnu.org/licenses/>. * * Linking this code with other modules is making a combined work * based on this code. Thus, the terms and conditions of the GNU * General Public License cover the whole combination. * * As a special exception, the copyright holders of this code give * you permission to link this code with independent modules to * produce an executable, regardless of the license terms of these * independent modules, and to copy and distribute the resulting * executable under terms of your choice, provided that you also * meet, for each linked independent module, the terms and conditions * of the license of that module. An independent module is a module * which is not derived from or based on this code. If you modify * this code, you may extend this exception to your version of the * library, but you are not obligated to do so. If you do not wish * to do so, delete this exception statement from your version. */ package com.redhat.thermostat.numa.agent.internal; import java.io.File; import java.io.FileInputStream; import java.io.FilenameFilter; import java.io.IOException; import java.io.InputStreamReader; import java.io.Reader; import com.redhat.thermostat.numa.common.NumaNodeStat; class NumaCollector { private static final String NUMA_BASE_DIR = "/sys/devices/system/node"; private static final String NODE_DIR_PREFIX = "node"; private static final String NUMA_STAT_FILE = "numastat"; private int numberOfNodes; private File baseDir; NumaCollector() { this(NUMA_BASE_DIR); } NumaCollector(String baseDirectory) { baseDir = new File(baseDirectory); FilenameFilter filter = new FilenameFilter() { @Override public boolean accept(File dir, String name) { return name.startsWith(NODE_DIR_PREFIX); } }; String[] nodeFiles = baseDir.list(filter); numberOfNodes = nodeFiles.length; } NumaNodeStat[] collectData() throws IOException { NumaNodeStat[] stat = new NumaNodeStat[numberOfNodes]; for (int i = 0; i < numberOfNodes; i++) { File nodeDir = new File(baseDir, NODE_DIR_PREFIX + i); File numaStatFile = new File(nodeDir, NUMA_STAT_FILE); try (FileInputStream in = new FileInputStream(numaStatFile)) { Reader reader = new InputStreamReader(in); NumaStatBuilder builder = new NumaStatBuilder(reader); stat[i] = builder.build(); stat[i].setNodeId(i); } } return stat; } // This is here for testing. String getBaseDir() { return baseDir.getAbsolutePath(); } }