usr.bin/systat/vmmeter.c

   1 #define _KERNEL_STRUCTURES
   2 #include <sys/param.h>
   3 #include <sys/sysctl.h>
   4 #include <sys/vmmeter.h>
   5
   6 #include <err.h>
   7 #include <kinfo.h>
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <devstat.h>
  12
  13 #include "systat.h"
  14 #include "extern.h"
  15
  16 #define X_START         1
  17 #define CPU_START       1
  18 #define CPU_LABEL_W     7
  19
  20 #define DRAW_ROW(n, y, w, fmt, args...) \
  21 do { \
  22         mvprintw(y, n, fmt, w, args); \
  23         n += w; \
  24 } while (0)
  25
  26 static int vmm_ncpus;
  27 static int vmm_fetched;
  28 static struct vmmeter *vmm_cur, *vmm_prev;
  29 static struct kinfo_cputime *vmm_cptime_cur, *vmm_cptime_prev;
  30
  31 static void
  32 getvmm(void)
  33 {
  34         size_t sz;
  35         int i;
  36
  37         for (i = 0; i < vmm_ncpus; ++i) {
  38                 struct vmmeter *vmm = &vmm_cur[i];
  39                 char buf[64];
  40
  41                 sz = sizeof(*vmm);
  42                 snprintf(buf, sizeof(buf), "vm.cpu%d.vmmeter", i);
  43                 if (sysctlbyname(buf, vmm, &sz, NULL, 0))
  44                         err(1, "sysctlbyname(cpu%d)", i);
  45
  46                 vmm->v_intr -= (vmm->v_timer + vmm->v_ipi);
  47         }
  48
  49         sz = vmm_ncpus * sizeof(struct kinfo_cputime);
  50         if (sysctlbyname("kern.cputime", vmm_cptime_cur, &sz, NULL, 0))
  51                 err(1, "kern.cputime");
  52 }
  53
  54 int
  55 initvmm(void)
  56 {
  57         return 1;
  58 }
  59
  60 void
  61 showvmm(void)
  62 {
  63         int i, n;
  64
  65         if (!vmm_fetched)
  66                 return;
  67
  68         for (i = 0; i < vmm_ncpus; ++i) {
  69                 struct kinfo_cputime d;
  70                 uint64_t cp_total = 0;
  71
  72                 n = X_START + CPU_LABEL_W;
  73
  74 #define D(idx, field) \
  75         (vmm_cur[idx].field - vmm_prev[idx].field) / (u_int)naptime
  76
  77                 DRAW_ROW(n, CPU_START + i, 6, "%*u", D(i, v_timer));
  78                 DRAW_ROW(n, CPU_START + i, 8, "%*u", D(i, v_ipi));
  79                 DRAW_ROW(n, CPU_START + i, 8, "%*u", D(i, v_intr));
  80
  81 #undef D
  82
  83 #define CPUD(dif, idx, field) \
  84 do { \
  85         dif.cp_##field = vmm_cptime_cur[idx].cp_##field - \
  86                          vmm_cptime_prev[idx].cp_##field; \
  87         cp_total += dif.cp_##field; \
  88 } while (0)
  89
  90 #define CPUV(dif, field) \
  91         (dif.cp_##field * 100.0) / cp_total
  92
  93                 CPUD(d, i, user);
  94                 CPUD(d, i, idle);
  95                 CPUD(d, i, intr);
  96                 CPUD(d, i, nice);
  97                 CPUD(d, i, sys);
  98
  99                 if (cp_total == 0)
 100                         cp_total = 1;
 101
 102                 DRAW_ROW(n, CPU_START + i, 7, "%*.1f", CPUV(d, user));
 103                 DRAW_ROW(n, CPU_START + i, 7, "%*.1f", CPUV(d, nice));
 104                 DRAW_ROW(n, CPU_START + i, 7, "%*.1f", CPUV(d, sys));
 105                 DRAW_ROW(n, CPU_START + i, 7, "%*.1f", CPUV(d, intr));
 106                 DRAW_ROW(n, CPU_START + i, 7, "%*.1f", CPUV(d, idle));
 107
 108 #undef CPUV
 109 #undef CPUD
 110         }
 111 }
 112
 113 void
 114 fetchvmm(void)
 115 {
 116         vmm_fetched = 1;
 117
 118         memcpy(vmm_prev, vmm_cur, sizeof(struct vmmeter) * vmm_ncpus);
 119         memcpy(vmm_cptime_prev, vmm_cptime_cur,
 120                sizeof(struct kinfo_cputime) * vmm_ncpus);
 121         getvmm();
 122 }
 123
 124 void
 125 labelvmm(void)
 126 {
 127         int i, n;
 128
 129         clear();
 130
 131         n = X_START + CPU_LABEL_W;
 132
 133         DRAW_ROW(n, 0, 6, "%*s", "timer");
 134         DRAW_ROW(n, 0, 8, "%*s", "ipi");
 135         DRAW_ROW(n, 0, 8, "%*s", "extint");
 136         DRAW_ROW(n, 0, 7, "%*s", "user%");
 137         DRAW_ROW(n, 0, 7, "%*s", "nice%");
 138         DRAW_ROW(n, 0, 7, "%*s", "sys%");
 139         DRAW_ROW(n, 0, 7, "%*s", "intr%");
 140         DRAW_ROW(n, 0, 7, "%*s", "idle%");
 141
 142         for (i = 0; i < vmm_ncpus; ++i)
 143                 mvprintw(CPU_START + i, X_START, "cpu%d", i);
 144 }
 145
 146 WINDOW *
 147 openvmm(void)
 148 {
 149         if (kinfo_get_cpus(&vmm_ncpus))
 150                 err(1, "kinfo_get_cpus");
 151
 152         vmm_cur = calloc(vmm_ncpus, sizeof(*vmm_cur));
 153         if (vmm_cur == NULL)
 154                 err(1, "calloc vmm_cur");
 155
 156         vmm_prev = calloc(vmm_ncpus, sizeof(*vmm_prev));
 157         if (vmm_prev == NULL)
 158                 err(1, "calloc vmm_prev");
 159
 160         vmm_cptime_cur = calloc(vmm_ncpus, sizeof(*vmm_cptime_cur));
 161         if (vmm_cptime_cur == NULL)
 162                 err(1, "calloc vmm_cptime_cur");
 163
 164         vmm_cptime_prev = calloc(vmm_ncpus, sizeof(*vmm_cptime_prev));
 165         if (vmm_cptime_prev == NULL)
 166                 err(1, "calloc vmm_cptime_prev");
 167
 168         getvmm();
 169
 170         return (stdscr);
 171 }
 172
 173 void
 174 closevmm(WINDOW *w)
 175 {
 176         if (vmm_cur != NULL)
 177                 free(vmm_cur);
 178         if (vmm_prev != NULL)
 179                 free(vmm_prev);
 180
 181         if (vmm_cptime_cur != NULL)
 182                 free(vmm_cptime_cur);
 183         if (vmm_cptime_prev != NULL)
 184                 free(vmm_cptime_prev);
 185
 186         vmm_fetched = 0;
 187
 188         if (w == NULL)
 189                 return;
 190         wclear(w);
 191         wrefresh(w);
 192 }