48e42f91c1
1. Add the TAP13 header 2. remove variable data from the test description line 3. move the plan count to the end of the file, for consistency with other kselftests 4. convert memory data from diagnostic (comment) format, to a YAML block Signed-off-by: Tim Bird <tim.bird@sony.com> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
106 lines
2.5 KiB
C
106 lines
2.5 KiB
C
/*
|
|
* Copyright 2014 Sony Mobile Communications Inc.
|
|
*
|
|
* Licensed under the terms of the GNU GPL License version 2
|
|
*
|
|
* Selftest for runtime system size
|
|
*
|
|
* Prints the amount of RAM that the currently running system is using.
|
|
*
|
|
* This program tries to be as small as possible itself, to
|
|
* avoid perturbing the system memory utilization with its
|
|
* own execution. It also attempts to have as few dependencies
|
|
* on kernel features as possible.
|
|
*
|
|
* It should be statically linked, with startup libs avoided.
|
|
* It uses no library calls, and only the following 3 syscalls:
|
|
* sysinfo(), write(), and _exit()
|
|
*
|
|
* For output, it avoids printf (which in some C libraries
|
|
* has large external dependencies) by implementing it's own
|
|
* number output and print routines, and using __builtin_strlen()
|
|
*/
|
|
|
|
#include <sys/sysinfo.h>
|
|
#include <unistd.h>
|
|
|
|
#define STDOUT_FILENO 1
|
|
|
|
static int print(const char *s)
|
|
{
|
|
return write(STDOUT_FILENO, s, __builtin_strlen(s));
|
|
}
|
|
|
|
static inline char *num_to_str(unsigned long num, char *buf, int len)
|
|
{
|
|
unsigned int digit;
|
|
|
|
/* put digits in buffer from back to front */
|
|
buf += len - 1;
|
|
*buf = 0;
|
|
do {
|
|
digit = num % 10;
|
|
*(--buf) = digit + '0';
|
|
num /= 10;
|
|
} while (num > 0);
|
|
|
|
return buf;
|
|
}
|
|
|
|
static int print_num(unsigned long num)
|
|
{
|
|
char num_buf[30];
|
|
|
|
return print(num_to_str(num, num_buf, sizeof(num_buf)));
|
|
}
|
|
|
|
static int print_k_value(const char *s, unsigned long num, unsigned long units)
|
|
{
|
|
unsigned long long temp;
|
|
int ccode;
|
|
|
|
print(s);
|
|
|
|
temp = num;
|
|
temp = (temp * units)/1024;
|
|
num = temp;
|
|
ccode = print_num(num);
|
|
print("\n");
|
|
return ccode;
|
|
}
|
|
|
|
/* this program has no main(), as startup libraries are not used */
|
|
void _start(void)
|
|
{
|
|
int ccode;
|
|
struct sysinfo info;
|
|
unsigned long used;
|
|
static const char *test_name = " get runtime memory use\n";
|
|
|
|
print("TAP version 13\n");
|
|
print("# Testing system size.\n");
|
|
|
|
ccode = sysinfo(&info);
|
|
if (ccode < 0) {
|
|
print("not ok 1");
|
|
print(test_name);
|
|
print(" ---\n reason: \"could not get sysinfo\"\n ...\n");
|
|
_exit(ccode);
|
|
}
|
|
print("ok 1");
|
|
print(test_name);
|
|
|
|
/* ignore cache complexities for now */
|
|
used = info.totalram - info.freeram - info.bufferram;
|
|
print("# System runtime memory report (units in Kilobytes):\n");
|
|
print(" ---\n");
|
|
print_k_value(" Total: ", info.totalram, info.mem_unit);
|
|
print_k_value(" Free: ", info.freeram, info.mem_unit);
|
|
print_k_value(" Buffer: ", info.bufferram, info.mem_unit);
|
|
print_k_value(" In use: ", used, info.mem_unit);
|
|
print(" ...\n");
|
|
print("1..1\n");
|
|
|
|
_exit(0);
|
|
}
|