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/*
* SPDX license identifier: MPL-2.0
*
* Copyright (C) 2011-2015, BMW AG
*
* This file is part of GENIVI Project DLT - Diagnostic Log and Trace.
*
* This Source Code Form is subject to the terms of the
* Mozilla Public License (MPL), v. 2.0.
* If a copy of the MPL was not distributed with this file,
* You can obtain one at http://mozilla.org/MPL/2.0/.
*
* For further information see http://www.genivi.org/.
*/
/*!
* \author Sven Hassler <sven_hassler@mentor.com>
*
* \copyright Copyright © 2011-2015 BMW AG. \n
* License MPL-2.0: Mozilla Public License version 2.0 http://mozilla.org/MPL/2.0/.
*
* \file dlt-test-init-free.c
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdbool.h>
#include "dlt_common.h"
#include "dlt_user.h"
void exec(const char *cmd, char *buffer, size_t length);
void printMemoryUsage();
char *occupyMemory(int size);
void do_example_test();
void do_dlt_test();
int num_repetitions;
int main(int argc, char **argv)
{
if (argc > 1)
num_repetitions = strtol(argv[1], 0, 10);
else
num_repetitions = 1000;
printf("Will do %d repetitions.\n", num_repetitions);
/*do_example_test(); */
do_dlt_test();
printf("Done.\n");
return 0;
}
/* Should increase and then decrease memory amount. */
void do_example_test()
{
const int immediatelyFree = 0;
int numBufs = 1024;
int sizePerBuf = 1024 * 1024; /* 1MB */
char **bufs = (char **)malloc(numBufs * sizeof(char *));
for (int i = 0; i < numBufs; i++) {
bufs[i] = occupyMemory(sizePerBuf);
printf("after alloc: ");
printMemoryUsage();
if (immediatelyFree) {
free(bufs[i]);
printf("after free: ");
printMemoryUsage();
}
}
printf("deleting memory:\n");
if (!immediatelyFree)
for (int i = 0; i < numBufs; i++) {
/*for (int i = numBufs - 1; i >= 0; i--) // other way round works, too */
free(bufs[i]);
printf("after free: ");
printMemoryUsage();
}
free(bufs);
}
/* Should give stable amount of memory across all iterations. */
void do_dlt_test()
{
for (int i = 0; i < num_repetitions; i++) {
dlt_init();
dlt_free();
printf("Iteration %d) - currently used memory amount: ", i);
printMemoryUsage();
}
}
void exec(const char *cmd, char *buffer, size_t length)
{
FILE *pipe = NULL;
strncpy(buffer, "ERROR", length);
if ((pipe = popen(cmd, "r")) == NULL)
return;
while (fgets(buffer, length, pipe) != NULL);
if (pipe != NULL)
pclose(pipe);
}
void printMemoryUsage()
{
char result[128] = { 0 };
char command[128] = { 0 };
snprintf(command, sizeof(command), "pmap %d | grep total", getpid());
exec(command, result, sizeof(result));
printf("%s", result);
}
char *occupyMemory(int size)
{
char *buf = (char *)malloc(size * sizeof(char));
for (int i = 0; i < 1; i++)
buf[i] = 1;
return buf;
}
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