[Soot-list] How to measure the memory usage ?

[Stephen Neuendorffer]

We use the attached script to summarize output of -Xloggc.
I believe you can get the same information out of JVMPI, which would
probably make it easier to compare a particular portion of code.

Steve

At 11:26 AM 10/16/2004 -0400, Prof. Laurie HENDREN wrote:
>I think one choice would be to turn on some of the gc information when
>you run your JVM (-verbose:gc).      You might also want to call an
>explicit gc before the part you want to measure, and then just after it.
>
>Anyone have another way?  It's an interesting question.
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#!/bin/sh
# Script that reads in output generated by Java -Xloggc and generates a
# memory usage report.
#
# @Authors: Steve Neuendorffer
#
# @Version: $Id: gcstats,v 1.5 2004/10/04 03:56:21 cxh Exp $
#
# @Copyright (c) 1997-2004 The Regents of the University of California.
# All rights reserved.
#
# Permission is hereby granted, without written agreement and without
# license or royalty fees, to use, copy, modify, and distribute this
# software and its documentation for any purpose, provided that the
# above copyright notice and the following two paragraphs appear in all
# copies of this software.
#
# IN NO EVENT SHALL THE UNIVERSITY OF CALIFORNIA BE LIABLE TO ANY PARTY
# FOR DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES
# ARISING OUT OF THE USE OF THIS SOFTWARE AND ITS DOCUMENTATION, EVEN IF
# THE UNIVERSITY OF CALIFORNIA HAS BEEN ADVISED OF THE POSSIBILITY OF
# SUCH DAMAGE.
#
# THE UNIVERSITY OF CALIFORNIA SPECIFICALLY DISCLAIMS ANY WARRANTIES,
# INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE SOFTWARE
# PROVIDED HEREUNDER IS ON AN "AS IS" BASIS, AND THE UNIVERSITY OF
# CALIFORNIA HAS NO OBLIGATION TO PROVIDE MAINTENANCE, SUPPORT, UPDATES,
# ENHANCEMENTS, OR MODIFICATIONS.
#
# 						PT_COPYRIGHT_VERSION_2
# 						COPYRIGHTENDKEY

# Lines look like
# 1.67619e-006: [Full GC 508K->160K(260160K), 0.0135542 secs]


gawk 'BEGIN {FS="K|>| "}
# accumulate GC lines
/\[Full GC/ {
    fullCount++;
    endingMemory=$6
    totalMemory=totalMemory+$4-$6
}
# accumulate GC lines
/\[GC/ {
    gcCount++;
    endingMemory=$5
    totalMemory=totalMemory+$3-$5
}
END {   
       print "GCStats: totalStatic: " endingMemory "K dynamicRT: " totalMemory "K"
}' -