mirror of https://github.com/mkerrisk/man-pages
116 lines
3.4 KiB
Groff
116 lines
3.4 KiB
Groff
.\" Copyright (c) 2013, Peter Schiffer (pschiffe@redhat.com)
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.\"
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.\" %%%LICENSE_START(GPLv2+_DOC_FULL)
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.\" This is free documentation; you can redistribute it and/or
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.\" modify it under the terms of the GNU General Public License as
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.\" published by the Free Software Foundation; either version 2 of
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.\" the License, or (at your option) any later version.
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.\"
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.\" The GNU General Public License's references to "object code"
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.\" and "executables" are to be interpreted as the output of any
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.\" document formatting or typesetting system, including
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.\" intermediate and printed output.
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.\"
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.\" This manual is distributed in the hope that it will be useful,
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.\" but WITHOUT ANY WARRANTY; without even the implied warranty of
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.\" MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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.\" GNU General Public License for more details.
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.\"
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.\" You should have received a copy of the GNU General Public
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.\" License along with this manual; if not, see
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.\" <http://www.gnu.org/licenses/>.
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.\" %%%LICENSE_END
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.TH MEMUSAGESTAT 1 2013-04-10 "GNU glibc 2.18" "Memory diagnostic tools"
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.SH NAME
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memusagestat \- generate graphic from memory profiling data
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.SH SYNOPSIS
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.BR memusagestat " [\fIoption\fR]... \fIdatafile\fR [\fIoutfile\fR]"
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.SH DESCRIPTION
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.B memusagestat
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can create a PNG file with graphical representation of memory profiling
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data.
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Red line in the graph shows the heap usage (allocated memory),
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green line shows the stack usage,
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x-scale number of memory handling functions calls or time (\fB-t\fR option).
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.I datafile
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is a binary data file generated by
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.BR memusage (1)
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utility with
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.B -d
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option.
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.SH OPTIONS
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.TP
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.BI \-o\ file \fR,\ \fB\-\-output= file
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Name of the output file.
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.TP
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.BI \-s\ string \fR,\ \fB\-\-string= string
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Title string used in the output graphic.
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.TP
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.BI \-t\fR,\ \fB\-\-time
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Generate output linear to time
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(default is linear to number of function calls).
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.TP
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.BI \-T\fR,\ \fB\-\-total
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Also draw graph for total memory consumption.
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.TP
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.BI \-x\ size \fR,\ \fB\-\-x-size= size
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Make graphic size pixels wide.
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.TP
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.BI \-y\ size \fR,\ \fB\-\-y\-size= size
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Make graphic size pixels high.
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.TP
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.BI \-?\fR,\ \fB\-\-help
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Print help and exit.
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.TP
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.BI \fB\-\-usage
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Print a short usage message and exit.
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.TP
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.BI \-V\fR,\ \fB\-\-version
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Print version information and exit.
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.SH EXAMPLES
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Here is a simple program \fImemusagestatexample.c\fR simulating increase
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and decrease of memory usage:
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.RS 4
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#include <stdio.h>
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.RS 0
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#include <stdlib.h>
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.RE
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.RS 0
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#define CYCLES 20
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.RE
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int main(int argc, char ** argv) {
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int i, j;
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int *p = NULL;
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printf("malloc: %d\\n", sizeof(int)*100);
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p = malloc(sizeof(int)*100);
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for (i = 0; i < CYCLES; i++) {
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if (i < CYCLES/2) j = i; else j--;
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printf("realloc: %d\\n", sizeof(int)*((j)*50 + 110));
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p = realloc(p, sizeof(int)*(j*50 + 100));
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printf("realloc: %d\\n", sizeof(int)*((j+1)*150 + 110));
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p = realloc(p, sizeof(int)*((j+1)*150 + 110));
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}
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free(p);
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return 0;
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.RS 0
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}
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.RE
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.RE
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After compiling and running the following, you can see progress of
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memory usage (memusagestatexample.png):
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memusage --data=memusagestatexample.dat ./memusagestatexample
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.RS 0
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memusagestat memusagestatexample.dat memusagestatexample.png
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.RE
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.SH BUGS
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For bug reporting instructions, please see:
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<http://www.gnu.org/software/libc/bugs.html>.
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.SH SEE ALSO
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.BR memusage (1)
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