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#include <stdio.h>
#include <kapplication.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/mman.h>
void showMem()
{
char buf[257];
printf("Reported Memory Usage Of This Process:\n");
FILE *fs = fopen("/proc/self/status", "r");
bool done = false;
while (!done)
{
fgets(buf, 256, fs);
buf[256] = 0;
if ((strncmp(buf, "VmLib", 5)==0) ||
(strncmp(buf, "VmData", 6)==0) ||
(strncmp(buf, "VmSize", 6)==0) ||
(strncmp(buf, "VmExe", 5)==0) ||
(strncmp(buf, "VmRSS", 5)==0) ||
(strncmp(buf, "VmLck", 5)==0))
printf("%s", buf);
done = (strncmp(buf, "VmLib", 5) == 0);
}
fclose(fs);
}
long showTotalMem()
{
long realMem = 0;
char buf[257];
FILE *fs = fopen("/proc/meminfo", "r");
bool done = false;
while (!done)
{
fgets(buf, 256, fs);
buf[256] = 0;
if (strlen(buf)==0) done = true;
if (strncmp(buf, "Mem:", 4)==0)
{
long total = 0;
long used = 0;
long free = 0;
long shared = 0;
long buffers = 0;
long cached = 0;
sscanf(buf, "Mem: %ld %ld %ld %ld %ld %ld",
&total, &used, &free, &shared, &buffers, &cached);
realMem = used-buffers-cached;
printf("Actual Total Memory Usage: %0.1fKb\n", realMem/1024.0);
done = true;
}
}
fclose(fs);
return realMem;
}
long memSize()
{
long realMem = 0;
char buf[257];
FILE *fs = fopen("/proc/meminfo", "r");
bool done = false;
while (!done)
{
fgets(buf, 256, fs);
buf[256] = 0;
if (strlen(buf)==0) done = true;
if (strncmp(buf, "Mem:", 4)==0)
{
long total = 0;
long used = 0;
long free = 0;
long shared = 0;
long buffers = 0;
long cached = 0;
sscanf(buf, "Mem: %ld %ld %ld %ld %ld %ld",
&total, &used, &free, &shared, &buffers, &cached);
realMem = total;
done = true;
}
}
fclose(fs);
return realMem;
}
void *mmapFile(const char *file)
{
int fd = open(file, O_RDONLY);
if (fd == 0)
{
printf("open: %s\n", strerror(errno));
exit(-1);
}
struct stat stat_s;
int result = fstat(fd, &stat_s);
if (result)
{
printf("stat: %s\n", strerror(errno));
exit(-1);
}
void *ptr = mmap(0, stat_s.st_size, PROT_READ, MAP_SHARED, fd, 0);
if (ptr == 0)
{
printf("mmap: %s\n", strerror(errno));
exit(-1);
}
return ptr;
}
int main(int argc, char *argv[])
{
if ((argc==2) && (strcmp(argv[1], "all")==0))
{
long mem_size = memSize();
mem_size += mem_size / 16;
printf("Malloc... %0.1fMb\n", mem_size/(1024.0*1024.0));
char *mem = (char *) malloc(mem_size);
for(long i=0; i < mem_size; i+=1024)
{
mem[i] = 99;
}
printf("Done!\n");
exit(1);
}
if ((argc==3) && (strcmp(argv[1], "calc")==0))
{
char buf[257];
int total = 0;
long val;
while(true)
{
buf[0] = 0;
fgets(buf, sizeof(buf), stdin);
if (!strlen(buf))
{
printf("%s total = %0.1fKb (%d bytes)\n", argv[2], total/1024.0, total);
exit(1);
}
sscanf(buf, "%lx", &val);
total += val;
// printf("Val = %ld\n", val);
}
exit(1);
}
if ((argc>=2) && (strcmp(argv[1], "launch")==0))
{
showMem();
char buf[200];
if (argc >=3)
snprintf(buf, 200, "%s &", argv[2]);
else
snprintf(buf, 200, "%s &", argv[0]);
printf("Waiting for memory usage to settle down....\n");
long prev = showTotalMem();
long diff = 0;
do {
sleep(15);
long next = showTotalMem();
if (next > prev)
diff = next - prev;
else
diff = prev-next;
prev = next;
}
while (diff > 2*1024);
for(int i=0; i < 5; i++)
{
printf("Launching #%d\n", i);
system(buf);
sleep(2);
}
sleep(10);
printf("Waiting for memory usage to settle down....\n");
prev = showTotalMem();
diff = 0;
do {
sleep(15);
long next = showTotalMem();
if (next > prev)
diff = next - prev;
else
diff = prev-next;
prev = next;
}
while (diff > 2*1024);
long fiveMem = prev;
for(int i=5; i < 15; i++)
{
printf("Launching #%d\n", i);
system(buf);
sleep(2);
}
sleep(10);
printf("Waiting for memory usage to settle down....\n");
prev = showTotalMem();
diff = 0;
do {
sleep(15);
long next = showTotalMem();
if (next > prev)
diff = next - prev;
else
diff = prev-next;
prev = next;
}
while (diff > 2*1024);
long fifteenMem = prev;
showMem();
printf("Actual memory usage of 1 instance = %0.1f Kb\n",
(fifteenMem - fiveMem) /10240.0);
}
// showMem("second");
KApplication app(argc,argv,"kurltest");
// showMem("After KApplication constructor");
// malloc(10*1024);
// showMem("After 10K malloc");
printf("Sleeping...\n");
sleep(8000);
}
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