3rd-party/linux-kernel-module-cheat
1
0
Fork 0
mirror of https://github.com/cirosantilli/linux-kernel-module-cheat.git synced 2026-01-25 11:11:35 +01:00
Code Issues Releases Wiki Activity

Become a memory accounting amateur

Browse Source
This commit is contained in:
Ciro Santilli 六四事件 法轮功
2019-08-27 00:00:00 +00:00
parent 1e969e832f
commit efc4205416
10 changed files with 411 additions and 65 deletions
Download Patch File Download Diff File Expand all files Collapse all files

30
userland/linux/total_memory.c Normal file
View File

@@ -0,0 +1,30 @@
/* https://cirosantilli.com/linux-kernel-module-cheat#memory-size */
#define _GNU_SOURCE
#include <stdio.h>
#include <sys/sysinfo.h>
#include <unistd.h>
int main(void) {
/* PAGESIZE is POSIX: http://pubs.opengroup.org/onlinepubs/9699919799/
* but PHYS_PAGES and AVPHYS_PAGES are glibc extensions. I bet those are
* parsed from /proc/meminfo. */
printf(
"sysconf(_SC_PHYS_PAGES) * sysconf(_SC_PAGESIZE) = 0x%lX\n",
sysconf(_SC_PHYS_PAGES) * sysconf(_SC_PAGESIZE)
);
printf(
"sysconf(_SC_AVPHYS_PAGES) * sysconf(_SC_PAGESIZE) = 0x%lX\n",
sysconf(_SC_AVPHYS_PAGES) * sysconf(_SC_PAGESIZE)
);
/* glibc extensions. man says they are parsed from /proc/meminfo. */
printf(
"get_phys_pages() * sysconf(_SC_PAGESIZE) = 0x%lX\n",
get_phys_pages() * sysconf(_SC_PAGESIZE)
);
printf(
"get_avphys_pages() * sysconf(_SC_PAGESIZE) = 0x%lX\n",
get_avphys_pages() * sysconf(_SC_PAGESIZE)
);
}