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load memory usage numbers (OpenBSD)

This commit is contained in:
bch 2017-02-18 21:06:47 +00:00
parent 81e6bddfa1
commit 6d54da1b0f
1 changed files with 93 additions and 17 deletions

110
get_mem.c
View File

@ -1,5 +1,7 @@
/*
* get_mem.c
/*
* Adapted: get memory usage on OpenBSD
* Author: Christian Barthel <bch@vcs.onfire.org>
*
* get memory usage, from get_load.c derived
*
* Author: Hans-Helmut Buehmann 20. Jan. 1996
@ -7,36 +9,110 @@
* Modified for more recent kernels Helmut Geyer Oct. 1996
*/
#include <sys/param.h> /* DEV_BSIZE MAXCOMLEN PZERO */
#include <sys/sysctl.h>
#include <sys/swap.h>
#include <sys/mount.h>
#include <sys/proc.h>
#include <X11/Xos.h>
#include <X11/Intrinsic.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "MemStripChart.h"
static int pageshift = -1;
#define pagetok(size) ((size) << pageshift)
#define LOG1024 10
void GetMemLoadPoint(w, closure, call_data) /* Linux version */
Widget w; /* unused */
caddr_t closure; /* unused */
caddr_t call_data; /* pointer to (MemStripChartCallbackData) return value */
static double allmem_kb = 0;
static void initPageShift(void)
{
MemStripChartCallbackData ret;
/* meminfo();*/
int pagesize = getpagesize();
pageshift = 0;
while (pagesize > 1) {
pageshift++;
pagesize >>= 1;
}
pageshift -= LOG1024;
}
/*et.code = (double)(kb_main_used - kb_main_buffers - kb_main_cached) / kb_main_total;
static double getSwapFrac()
{
struct swapent *swdev;
int used, total, nswap, rnswap, i;
nswap = swapctl(SWAP_NSWAP, 0, 0);
if (nswap == 0)
return 0;
swdev = calloc(nswap, sizeof(*swdev));
if (swdev == NULL)
return 0;
rnswap = swapctl(SWAP_STATS, swdev, nswap);
if (rnswap == -1) {
free(swdev);
return 0;
}
/* if rnswap != nswap, then what? */
/* Total things up */
total = used = 0;
for (i = 0; i < nswap; i++) {
if (swdev[i].se_flags & SWF_ENABLE) {
used += (swdev[i].se_inuse / (1024 / DEV_BSIZE));
total += (swdev[i].se_nblks / (1024 / DEV_BSIZE));
}
}
free(swdev);
return (double)used/total;
}
void GetMemLoadPoint(Widget w, caddr_t closure, caddr_t call_data)
{
static int bcstats_mib[] = {CTL_VFS, VFS_GENERIC, VFS_BCACHESTAT};
static int uvmexp_mib[] = {CTL_VM, VM_UVMEXP};
MemStripChartCallbackData ret;
struct uvmexp uvmexp;
struct bcachestats bcstats;
size_t size;
if (pageshift < 0)
initPageShift();
/*ret.code = (double)(kb_main_used - kb_main_buffers - kb_main_cached) / kb_main_total;
ret.cached = (double)kb_main_cached / (double)kb_main_total;
ret.buffer = (double)kb_main_buffers / (double)kb_main_total;
ret.free = (double)kb_main_free / (double)kb_main_total;
ret.swap = (double)kb_swap_used / (double)kb_main_total;
*/
printf("test?\n");
ret.code = 0.5;
ret.cached = 0.5;
ret.buffer = 0.5;
ret.free = 0.5;
ret.swap = 0.5;
size = sizeof(uvmexp);
if (sysctl(uvmexp_mib, 2, &uvmexp, &size, NULL, 0) < 0) {
warn("sysctl failed");
bzero(&uvmexp, sizeof(uvmexp));
}
size = sizeof(bcstats);
if (sysctl(bcstats_mib, 3, &bcstats, &size, NULL, 0) < 0) {
warn("sysctl failed");
bzero(&bcstats, sizeof(bcstats));
}
memcpy(call_data, &ret, sizeof(MemStripChartCallbackData));
allmem_kb = pagetok(uvmexp.npages);
ret.cached = pagetok(bcstats.numbufpages) / allmem_kb;
ret.free = pagetok(uvmexp.free) / allmem_kb;
ret.buffer = 0;
ret.code = (1 - ret.cached - ret.free);
ret.swap = getSwapFrac();
#ifdef DEBUG
printf("%lf %lf %lf %lf %lf\n", allmem_kb, ret.code, ret.cached, ret.free, ret.swap);
#endif
memcpy(call_data, &ret, sizeof(MemStripChartCallbackData));
}