/*
* Copyright (C) [2004, 2005, 2006], Hyperic, Inc.
* This file is part of SIGAR.
*
* SIGAR is free software; you can redistribute it and/or modify
* it under the terms version 2 of the GNU General Public License as
* published by the Free Software Foundation. This program 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 this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
* USA.
*/
package org.hyperic.sigar.cmd;
import org.hyperic.sigar.Sigar;
import org.hyperic.sigar.ProcMem;
/**
* Watch for changes in program memory usage.
*/
public class MemWatch {
static final int SLEEP_TIME = 1000 * 10;
public static void main(String[] args) throws Exception {
Sigar sigar = new Sigar();
if (args.length != 1) {
throw new Exception("Usage: MemWatch pid");
}
long pid = Long.parseLong(args[0]);
long lastTime = System.currentTimeMillis();
ProcMem last = sigar.getProcMem(pid);
while (true) {
ProcMem cur = sigar.getProcMem(pid);
StringBuffer diff = diff(last, cur);
if (diff.length() == 0) {
System.out.println("no change " +
"(size=" +
Sigar.formatSize(cur.getSize()) +
")");
}
else {
long curTime = System.currentTimeMillis();
long timeDiff = curTime - lastTime;
lastTime = curTime;
diff.append(" after " + timeDiff + "ms");
System.out.println(diff);
}
last = cur;
Thread.sleep(SLEEP_TIME);
}
}
private static StringBuffer diff(ProcMem last, ProcMem cur) {
StringBuffer buf = new StringBuffer();
long diff;
diff = cur.getSize() - last.getSize();
if (diff != 0) {
buf.append("size=" + diff);
}
diff = cur.getResident() - last.getResident();
if (diff != 0) {
buf.append(", resident=" + diff);
}
diff = cur.getShare() - last.getShare();
if (diff != 0) {
buf.append(", share=" + diff);
}
return buf;
}
}