97 lines
2 KiB
C
97 lines
2 KiB
C
/*
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* mem_openbsd.c - module to get memory/swap usages in percent, for OpenBSD
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*
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* Copyright (c) 2001 Seiichi SATO <ssato@sh.rim.or.jp>
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*
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* licensed under the GPL
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <stdio.h>
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#include <unistd.h>
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#include <stdlib.h>
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#include <string.h>
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#include "mem.h"
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#include <sys/param.h>
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#include <sys/sysctl.h>
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#include <sys/swap.h>
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/* initialize function */
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void
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mem_init(void)
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{
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return;
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}
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/* get swap usage */
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static int
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get_swap_usage(void)
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{
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struct swapent *swap_dev;
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int num_swap;
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int stotal, sused, i;
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stotal = sused = 0;
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if ((num_swap = swapctl(SWAP_NSWAP, 0, 0)) == 0)
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return 0;
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if ((swap_dev = malloc(num_swap * sizeof(*swap_dev))) == NULL)
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return 0;
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if (swapctl(SWAP_STATS, swap_dev, num_swap) == -1)
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return 0;
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for (i = 0; i < num_swap; i++) {
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if (swap_dev[i].se_flags & SWF_ENABLE) {
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stotal += swap_dev[i].se_nblks;
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sused += swap_dev[i].se_inuse;
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}
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}
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free(swap_dev);
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if (sused == 0)
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return 0;
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return (100 * (double) sused / (double) stotal);
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}
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/* return mem/swap usage in percent 0 to 100 */
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void
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mem_getusage(int *per_mem, int *per_swap, const struct mem_options *opts)
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{
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struct vmtotal vm;
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size_t size = sizeof(vm);
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static int mib[] = { CTL_VM, VM_METER };
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/* get mem usage */
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if (sysctl(mib, 2, &vm, &size, NULL, 0) < 0)
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bzero(&vm, sizeof(vm));
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/* calc mem usage in percent */
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if (vm.t_rm > 0)
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*per_mem = 100 * (double) vm.t_rm / (double) (vm.t_rm + vm.t_free);
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if (*per_mem > 97) *per_mem = 100;
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/* swap */
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*per_swap = get_swap_usage();
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#ifdef DEBUG
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printf("t_rm total real memory in use %6d\n", vm.t_rm);
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printf("t_arm active real memory %6d\n", vm.t_arm);
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printf("t_rmshr shared real memory %6d\n", vm.t_rmshr);
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printf("t_armshr active shared real memory %6d\n", vm.t_armshr);
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printf("t_free free memory pages %6d\n", vm.t_free);
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#endif
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return;
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}
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