114 lines
2.7 KiB
C
114 lines
2.7 KiB
C
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/* $Id: get_mem_fbsd.c,v 1.1 2018/12/26 18:46:16 bch Exp $
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*
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* Author: Christian Barthel <bch@online.de>
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*/
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#include <sys/types.h> /* DEV_BSIZE MAXCOMLEN PZERO */
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#include <sys/sysctl.h>
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#include <unistd.h>
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#include <kvm.h>
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#include <X11/Xos.h>
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#include <X11/Intrinsic.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <err.h>
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#include "MemStripChart.h"
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static int pageshift = -1;
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static int pagesize = 0;
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static kvm_t *kd = 0;
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#define pagetok(size) ((size) << pageshift)
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#define LOG1024 10
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static unsigned int allmem_pages = 0;
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static void initPageShift(void)
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{
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pagesize = getpagesize();
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size_t len = sizeof(allmem_pages);
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int mib[len];
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pageshift = 0;
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while (pagesize > 1) {
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pageshift++;
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pagesize >>= 1;
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}
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pageshift -= LOG1024;
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kd = kvm_open(NULL, "/dev/null" ,NULL, O_RDONLY, "kvm_open");
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if (sysctlbyname("vm.stats.vm.v_page_count", &allmem_pages, &len, NULL, 0) == -1)
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perror("sysctl");
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#ifdef DEBUG
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printf("page_count: %d\n", allmem_pages);
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#endif
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}
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static double getSwapFrac()
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{
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/* XXX Borrowed from top(1) code: */
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int n;
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struct kvm_swap swapary[1];
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static int pagesize = 0;
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static unsigned long swap_maxpages = 0;
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size_t sz = sizeof(swap_maxpages);
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int retavail = 0;
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int retfree = 0;
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n = kvm_getswapinfo(kd, swapary, 1, 0);
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if (n < 0 || swapary[0].ksw_total == 0)
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return (0);
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if (swap_maxpages == 0)
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sysctlbyname("vm.swap_maxpages", &swap_maxpages, &sz, NULL, 0);
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if ( swapary[0].ksw_total > swap_maxpages )
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swapary[0].ksw_total = swap_maxpages;
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retavail = swapary[0].ksw_total;
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retfree = swapary[0].ksw_total - swapary[0].ksw_used;
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#ifdef DEBUG
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printf("swap: %d %d %d %d\n", retavail, retavail, swapary[0].ksw_total,
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swapary[0].ksw_used);
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#endif
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return (double)(retavail-retfree)/(double)retavail;
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}
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void GetMemLoadPoint(Widget w, caddr_t closure, caddr_t call_data)
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{
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MemStripChartCallbackData ret;
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int a, b;
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size_t sz = sizeof(int);
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double cache = 0;
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if (pageshift < 0)
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initPageShift();
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sysctlbyname("vm.stats.vm.v_wire_count", &a, &sz, NULL, 0);
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ret.code = (double)a / (double)allmem_pages;
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sysctlbyname("vm.stats.vm.v_active_count", &a, &sz, NULL, 0);
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ret.buffer = (double)a / (double)allmem_pages;
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/* v_cache_count and v_inactive_count are treated similarly */
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sysctlbyname("vm.stats.vm.v_inactive_count", &a, &sz, NULL, 0);
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sysctlbyname("vm.stats.vm.v_cache_count", &b, &sz, NULL, 0);
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ret.cached = (double)(a + b) / allmem_pages;
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sysctlbyname("vm.stats.vm.v_free_count", &a, &sz, NULL, 0);
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ret.free = (double)a / allmem_pages;
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ret.swap = getSwapFrac();
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#ifdef DEBUG
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printf("%u %lf %lf %lf %lf\n", allmem_pages,
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ret.code, ret.cached, ret.free, ret.swap);
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#endif
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memcpy(call_data, &ret, sizeof(MemStripChartCallbackData));
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}
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