forked from Lainports/freebsd-ports
215 lines
7.4 KiB
Diff
215 lines
7.4 KiB
Diff
--- src/mem_freebsd.c.orig 2002-10-14 05:23:26.000000000 -0700
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+++ src/mem_freebsd.c 2008-05-03 13:46:06.000000000 -0700
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@@ -17,38 +17,45 @@
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#include <stdlib.h>
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#include "mem.h"
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-#include <kvm.h>
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+#include <sys/types.h>
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+#include <sys/sysctl.h>
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+#include <vm/vm_param.h>
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#include <fcntl.h>
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-#include <sys/vmmeter.h>
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#include <time.h>
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-static kvm_t *kvm_data = NULL;
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-static int pageshift;
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-static struct nlist nlst[] = { {"_cp_time"}, {"_cnt"}, {0} };
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+static int page_size_mib[4] = { -1, -1, -1, -1 };
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+static int page_count_mib[4] = { -1, -1, -1, -1 };
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+static int free_count_mib[4] = { -1, -1, -1, -1 };
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+static int active_count_mib[4] = { -1, -1, -1, -1 };
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+static int inactive_count_mib[4] = { -1, -1, -1, -1 };
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+static int wire_count_mib[4] = { -1, -1, -1, -1 };
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+static int cache_count_mib[4] = { -1, -1, -1, -1 };
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+static int swappgsout_mib[4] = { -1, -1, -1, -1 };
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+static int swappgsin_mib[4] = { -1, -1, -1, -1 };
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+
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+static size_t page_size_len = 4;
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+static size_t page_count_len = 4;
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+static size_t free_count_len = 4;
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+static size_t active_count_len = 4;
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+static size_t inactive_count_len = 4;
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+static size_t wire_count_len = 4;
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+static size_t cache_count_len = 4;
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+static size_t swappgsout_len = 4;
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+static size_t swappgsin_len = 4;
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/* initialize function */
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void mem_init(void)
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{
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- int pagesize = getpagesize();
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- pageshift = 0;
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+ init_mib("vm.stats.vm.v_page_size",page_size_mib,&page_size_len);
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+ init_mib("vm.stats.vm.v_page_count",page_count_mib,&page_count_len);
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+ init_mib("vm.stats.vm.v_free_count",free_count_mib,&free_count_len);
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+ init_mib("vm.stats.vm.v_active_count",active_count_mib,&active_count_len);
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+ init_mib("vm.stats.vm.v_inactive_count",inactive_count_mib,&inactive_count_len);
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+ init_mib("vm.stats.vm.v_wire_count",wire_count_mib,&wire_count_len);
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+ init_mib("vm.stats.vm.v_cache_count",cache_count_mib,&cache_count_len);
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+ init_mib("vm.stats.vm.v_swappgsout",swappgsout_mib,&swappgsout_len);
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+ init_mib("vm.stats.vm.v_swappgsin",swappgsin_mib,&swappgsin_len);
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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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-
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- kvm_data = kvm_open(NULL, NULL, NULL, O_RDONLY, "kvm_open");
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-
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- if (kvm_data == NULL) {
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- fprintf(stderr, "can't open kernel virtual memory");
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- exit(1);
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- }
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- kvm_nlist(kvm_data, nlst);
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-
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- if (nlst[0].n_type == 0 || nlst[1].n_type == 0) {
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- fprintf(stderr, "error extracting symbols");
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- exit(1);
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- }
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/* drop setgid & setuid (the latter should not be there really) */
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seteuid(getuid());
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setegid(getgid());
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@@ -59,26 +66,38 @@
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}
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}
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-
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/* return mem/swap usage in percent 0 to 100 */
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void mem_getusage(int *per_mem, int *per_swap, const struct mem_options *opts)
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{
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- struct vmmeter vm;
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- int bufspace;
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+ unsigned long int page_size;
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+ unsigned long int page_count;
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+ unsigned long int free_count;
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+ unsigned long int active_count;
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+ unsigned long int inactive_count;
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+ unsigned long int wire_count;
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+ unsigned long int cache_count;
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+ long int swappgsout;
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+ long int swappgsin;
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+
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+ static long int saved_swappgsout = -1;
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+ static long int saved_swappgsin = -1;
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+
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static int swap_firsttime = 1;
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- static int swappgsin = -1;
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- static int swappgsout = -1;
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- static int swapmax = 0, swapused = 0;
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+ static long int swapmax = 0, swapused = 0;
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time_t cur_time;
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static time_t last_time_swap = 0;
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u_int mused;
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/* get mem usage */
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- if (kvm_read(kvm_data, nlst[0].n_value, &bufspace, sizeof(bufspace)) !=
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- sizeof(bufspace))
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- exit(1);
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- if (kvm_read(kvm_data, nlst[1].n_value, &vm, sizeof(vm)) != sizeof(vm))
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- exit(1);
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+ if (sysctl(page_size_mib, 4, &page_size, &page_size_len, NULL, 0) == -1) return;
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+ if (sysctl(page_count_mib, 4, &page_count, &page_count_len, NULL, 0) == -1) return;
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+ if (sysctl(free_count_mib, 4, &free_count, &free_count_len, NULL, 0) == -1) return;
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+ if (sysctl(active_count_mib, 4, &active_count, &active_count_len, NULL, 0) == -1) return;
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+ if (sysctl(inactive_count_mib, 4, &inactive_count, &inactive_count_len, NULL, 0) == -1) return;
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+ if (sysctl(wire_count_mib, 4, &wire_count, &wire_count_len, NULL, 0) == -1) return;
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+ if (sysctl(cache_count_mib, 4, &cache_count, &cache_count_len, NULL, 0) == -1) return;
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+ if (sysctl(swappgsout_mib, 4, &swappgsout, &swappgsout_len, NULL, 0) == -1) return;
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+ if (sysctl(swappgsin_mib, 4, &swappgsin, &swappgsin_len, NULL, 0) == -1) return;
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/* get swap usage */
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/* only calculate when first time or when changes took place */
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@@ -86,45 +105,69 @@
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/* otherwise it can eat up to 50% of CPU time on heavy swap activity */
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cur_time = time(NULL);
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if (swap_firsttime ||
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- (((vm.v_swappgsin > swappgsin) || (vm.v_swappgsout > swappgsout))
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+ (((swappgsin > saved_swappgsin) || (swappgsout > saved_swappgsout))
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&& cur_time > last_time_swap + 1)) {
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- struct kvm_swap swap;
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- int n;
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-
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swapmax = 0;
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swapused = 0;
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- n = kvm_getswapinfo(kvm_data, &swap, 1, 0);
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- if (n >= 0 && swap.ksw_total != 0) {
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- swapmax = swap.ksw_total;
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- swapused = swap.ksw_used;
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- }
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+ getswapinfo(&swapmax,&swapused);
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swap_firsttime = 0;
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last_time_swap = cur_time;
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}
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- swappgsin = vm.v_swappgsin;
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- swappgsout = vm.v_swappgsout;
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+ saved_swappgsin = swappgsin;
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+ saved_swappgsout = swappgsout;
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#ifdef DEBUG
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printf ("-------------------\n");
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- printf ("total:%10d\n", vm.v_page_count * vm.v_page_size);
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- printf ("free :%10d\n", vm.v_free_count * vm.v_page_size);
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- printf ("act :%10d\n", vm.v_active_count * vm.v_page_size);
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- printf ("inact:%10d\n", vm.v_inactive_count * vm.v_page_size);
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- printf ("wired:%10d\n", vm.v_wire_count * vm.v_page_size);
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- printf ("cache:%10d\n", vm.v_cache_count * vm.v_page_size);
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+ printf ("total:%10d\n", page_count * page_size);
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+ printf ("free :%10d\n", free_count * page_size);
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+ printf ("act :%10d\n", active_count * page_size);
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+ printf ("inact:%10d\n", inactive_count * page_size);
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+ printf ("wired:%10d\n", wire_count * page_size);
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+ printf ("cache:%10d\n", cache_count * page_size);
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printf ("-------------------\n");
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#endif
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/* calc mem/swap usage in percent */
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- mused = vm.v_page_count - vm.v_free_count;
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- if (opts->ignore_wired) mused -= vm.v_wire_count;
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- if (opts->ignore_cached) mused -= vm.v_cache_count;
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+ mused = page_count - free_count;
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+ if (opts->ignore_wired) mused -= wire_count;
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+ if (opts->ignore_cached) mused -= cache_count;
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- *per_mem = 100 * (double) mused / (double) vm.v_page_count;
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+ *per_mem = 100 * (double) mused / (double) page_count;
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*per_swap = 100 * (double) swapused / (double) swapmax;
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if (*per_mem > 97) *per_mem = 100;
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}
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+
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+/* sets up the mib for a sysctl */
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+void init_mib(char *sysctlname, int *mib, size_t *len)
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+{
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+ if (sysctlnametomib(sysctlname,mib,len) == -1) {
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+ fprintf(stderr, "bad sysctl %s\n", sysctlname);
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+ exit(1);
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+ }
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+}
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+
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+/* returns total and used number of swap pages */
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+void getswapinfo (long *swapmax, long *swapused)
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+{
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+ size_t miblen, size;
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+ int mib[16], n;
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+ struct xswdev xsw;
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+
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+ miblen = sizeof mib / sizeof mib[0];
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+ init_mib("vm.swap_info",mib,&miblen);
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+
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+ for (n=0;; n++)
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+ {
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+ mib[miblen] = n;
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+ size = sizeof xsw;
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+ if (sysctl(mib,miblen+1,&xsw,&size,NULL,0) == -1)
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+ break;
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+ *swapmax += (long) xsw.xsw_nblks;
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+ *swapused += (long) xsw.xsw_used;
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+ }
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+}
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+
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