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1.1 root 1: static char *sccsid = "@(#)vmstat.c 4.2 (Berkeley) 10/15/80";
2: #include <stdio.h>
3: #include <sys/param.h>
4: #include <sys/vm.h>
5: #include <sys/dk.h>
6: #include <nlist.h>
7:
8: struct nlist nl[] = {
9: #define X_CPTIME 0
10: { "_cp_time" },
11: #define X_RATE 1
12: { "_rate" },
13: #define X_TOTAL 2
14: { "_total" },
15: #define X_DEFICIT 3
16: { "_deficit" },
17: #define X_FORKSTAT 4
18: { "_forkstat" },
19: #define X_SUM 5
20: { "_sum" },
21: #define X_FIRSTFREE 6
22: { "_firstfree" },
23: #define X_MAXFREE 7
24: { "_maxfree" },
25: #define X_BOOTIME 8
26: { "_bootime" },
27: #define X_DKXFER 9
28: { "_dk_xfer" },
29: #ifdef ERNIE
30: #define X_REC 10
31: { "_rectime" },
32: #define X_PGIN 11
33: { "_pgintime" },
34: #endif
35: { 0 },
36: };
37:
38: double stat1();
39: int firstfree, maxfree;
40: struct
41: {
42: int busy;
43: long time[CPUSTATES];
44: long xfer[DK_NDRIVE];
45: struct vmmeter Rate;
46: struct vmtotal Total;
47: struct vmmeter Sum;
48: struct forkstat Forkstat;
49: #ifdef ERNIE
50: unsigned rectime;
51: unsigned pgintime;
52: #endif
53: } s, s1, z;
54: #define rate s.Rate
55: #define total s.Total
56: #define sum s.Sum
57: #define forkstat s.Forkstat
58:
59: int iflag = 1;
60: int zero;
61: int deficit;
62: double etime;
63: int mf;
64:
65: main(argc, argv)
66: char **argv;
67: {
68: time_t now;
69: int lines;
70: extern char *ctime();
71: register i,j;
72: int iter, nintv;
73: time_t bootime;
74: double f1, f2;
75: long t;
76: extern char _sobuf[];
77:
78: setbuf(stdout, _sobuf);
79: nlist("/vmunix", nl);
80: if(nl[0].n_type == 0) {
81: printf("no /vmunix namelist\n");
82: exit(1);
83: }
84: mf = open("/dev/kmem", 0);
85: if(mf < 0) {
86: printf("cannot open /dev/kmem\n");
87: exit(1);
88: }
89: iter = 0;
90: argc--, argv++;
91: while (argc>0 && argv[0][0]=='-') {
92: char *cp = *argv++;
93: argc--;
94: while (*++cp) switch (*cp) {
95:
96: #ifdef ERNIE
97: case 't':
98: dotimes();
99: exit(0);
100: #endif
101: case 'z':
102: close(mf);
103: mf = open("/dev/kmem", 2);
104: lseek(mf, (long)nl[X_SUM].n_value, 0);
105: write(mf, &z.Sum, sizeof z.Sum);
106: exit(0);
107:
108: case 'f':
109: doforkst();
110: exit(0);
111:
112: case 's':
113: dosum();
114: exit(0);
115:
116: case 'i':
117: iflag = 0;
118: break;
119:
120: default:
121: fprintf(stderr, "usage: vmstat [ -fs ] [ interval ] [ count]\n");
122: exit(1);
123: }
124: }
125: if(argc > 1)
126: iter = atoi(argv[1]);
127: lseek(mf, (long)nl[X_FIRSTFREE].n_value, 0);
128: read(mf, &firstfree, sizeof firstfree);
129: lseek(mf, (long)nl[X_MAXFREE].n_value, 0);
130: read(mf, &maxfree, sizeof maxfree);
131: lseek(mf, (long)nl[X_BOOTIME].n_value, 0);
132: read(mf, &bootime, sizeof bootime);
133: time(&now);
134: nintv = now - bootime;
135: if (nintv <= 0 || nintv > 60*60*24*365*10) {
136: printf("Time makes no sense... namelist must be wrong.\n");
137: exit(1);
138: }
139: reprint:
140: lines = 20;
141: /* s1 = z; */
142: if (iflag==0)
143: printf("\
144: Procs Virtual Real Page Swap Disk Cpu\n\
145: RQ DW PW SW AVM TX FRE RE AT PI PO FR DE SR I O D0 D1 D2 D3 CS US SY ID\n\
146: ");
147: else
148: printf("\
149: Procs Memory Page Swap Disk Faults Cpu\n\
150: R B W AVM FRE RE AT PI PO FR DE SR I O D0 D1 D2 D3 IN SY CS US SY ID\n\
151: ");
152: loop:
153: lseek(mf, (long)nl[X_CPTIME].n_value, 0);
154: read(mf, s.time, sizeof s.time);
155: lseek(mf, (long)nl[X_DKXFER].n_value, 0);
156: read(mf, s.xfer, sizeof s.xfer);
157: if (nintv != 1) {
158: lseek(mf, (long)nl[X_SUM].n_value, 0);
159: read(mf, &rate, sizeof rate);
160: } else {
161: lseek(mf, (long)nl[X_RATE].n_value, 0);
162: read(mf, &rate, sizeof rate);
163: }
164: lseek(mf, (long)nl[X_TOTAL].n_value, 0);
165: read(mf, &total, sizeof total);
166: lseek(mf, (long)nl[X_DEFICIT].n_value, 0);
167: read(mf, &deficit, sizeof deficit);
168: etime = 0;
169: for (i=0; i < DK_NDRIVE; i++) {
170: t = s.xfer[i];
171: s.xfer[i] -= s1.xfer[i];
172: s1.xfer[i] = t;
173: }
174: for (i=0; i < CPUSTATES; i++) {
175: t = s.time[i];
176: s.time[i] -= s1.time[i];
177: s1.time[i] = t;
178: etime += s.time[i];
179: }
180: if(etime == 0.)
181: etime = 1.;
182: if (iflag)
183: printf("%2d%2d%2d", total.t_rq, total.t_dw+total.t_pw,
184: total.t_sw);
185: else
186: printf("%2d%3d%3d%3d%3d", total.t_rq, total.t_dw, total.t_pw,
187: total.t_sw);
188: if (iflag)
189: printf("%6d%5d", total.t_avm/2, total.t_free/2);
190: else
191: printf("%6d%3d%5d", total.t_avm/2,
192: pct(total.t_avmtxt, total.t_avm), total.t_free/2);
193: printf("%4d%3d%3d",
194: (rate.v_pgrec - (rate.v_xsfrec+rate.v_xifrec))/nintv,
195: (rate.v_xsfrec+rate.v_xifrec)/nintv, rate.v_pgin/nintv);
196: printf("%3d%3d%4d%4.1f%2d%2d", rate.v_pgout/nintv,
197: rate.v_dfree/nintv, deficit/2,
198: (60.0 * rate.v_scan) / (LOOPSIZ*nintv),
199: rate.v_swpin/nintv, rate.v_swpout/nintv);
200: etime /= 60.;
201: printf(" ");
202: for(i=0; i<4; i++)
203: stats(i);
204: if (iflag)
205: printf("%4d%4d", (rate.v_intr/nintv) - HZ,
206: rate.v_syscall/nintv);
207: printf("%4d", rate.v_swtch/nintv);
208: for(i=0; i<CPUSTATES; i++) {
209: float f = stat1(i);
210: if (i == 0) { /* US+NI */
211: i++;
212: f += stat1(i);
213: }
214: printf("%3.0f", f);
215: }
216: printf("\n");
217: fflush(stdout);
218: contin:
219: nintv = 1;
220: --iter;
221: if(iter)
222: if(argc > 0) {
223: sleep(atoi(argv[0]));
224: if (--lines <= 0)
225: goto reprint;
226: goto loop;
227: }
228: }
229:
230: #ifdef ERNIE
231: dotimes()
232: {
233:
234: lseek(mf, (long)nl[X_REC].n_value, 0);
235: read(mf, &s.rectime, sizeof s.rectime);
236: lseek(mf, (long)nl[X_PGIN].n_value, 0);
237: read(mf, &s.pgintime, sizeof s.pgintime);
238: lseek(mf, (long)nl[X_SUM].n_value, 0);
239: read(mf, &sum, sizeof sum);
240: printf("%d reclaims, %d total time (usec)\n", sum.v_pgrec, s.rectime);
241: printf("average: %d usec / reclaim\n", s.rectime/sum.v_pgrec);
242: printf("\n");
243: printf("%d page ins, %d total time (msec)\n",sum.v_pgin, s.pgintime/10);
244: printf("average: %8.1f msec / page in\n", s.pgintime/(sum.v_pgin*10.0));
245: }
246: #endif
247:
248: dosum()
249: {
250:
251: lseek(mf, (long)nl[X_SUM].n_value, 0);
252: read(mf, &sum, sizeof sum);
253: printf("%9d swap ins\n", sum.v_swpin);
254: printf("%9d swap outs\n", sum.v_swpout);
255: printf("%9d pages swapped in\n", sum.v_pswpin / CLSIZE);
256: printf("%9d pages swapped out\n", sum.v_pswpout / CLSIZE);
257: printf("%9d total address trans. faults taken\n", sum.v_faults);
258: printf("%9d page ins\n", sum.v_pgin);
259: printf("%9d page outs\n", sum.v_pgout);
260: printf("%9d total reclaims\n", sum.v_pgrec);
261: printf("%9d reclaims from free list\n", sum.v_pgfrec);
262: printf("%9d intransit blocking page faults\n", sum.v_intrans);
263: printf("%9d zero fill pages created\n", sum.v_nzfod / CLSIZE);
264: printf("%9d zero fill page faults\n", sum.v_zfod / CLSIZE);
265: printf("%9d executable fill pages created\n", sum.v_nexfod / CLSIZE);
266: printf("%9d executable fill page faults\n", sum.v_exfod / CLSIZE);
267: printf("%9d swap text pages found in free list\n", sum.v_xsfrec);
268: printf("%9d inode text pages found in free list\n", sum.v_xifrec);
269: printf("%9d file fill pages created\n", sum.v_nvrfod / CLSIZE);
270: printf("%9d file fill page faults\n", sum.v_vrfod / CLSIZE);
271: printf("%9d pages examined by the clock daemon\n", sum.v_scan);
272: printf("%9d revolutions of the clock hand\n", sum.v_rev);
273: printf("%9d pages freed by the clock daemon\n", sum.v_dfree / CLSIZE);
274: printf("%9d cpu context switches\n", sum.v_swtch);
275: printf("%9d device interrupts\n", sum.v_intr);
276: printf("%9d pseduo-dma dz interrupts\n", sum.v_pdma);
277: printf("%9d traps\n", sum.v_trap);
278: printf("%9d system calls\n", sum.v_syscall);
279: }
280:
281:
282: doforkst()
283: {
284:
285: lseek(mf, (long)nl[X_FORKSTAT].n_value, 0);
286: read(mf, &forkstat, sizeof forkstat);
287: printf("%d forks, %d pages, average=%.2f\n",
288: forkstat.cntfork, forkstat.sizfork,
289: (float) forkstat.sizfork / forkstat.cntfork);
290: printf("%d vforks, %d pages, average=%.2f\n",
291: forkstat.cntvfork, forkstat.sizvfork,
292: (float)forkstat.sizvfork / forkstat.cntvfork);
293: }
294:
295: stats(dn)
296: {
297:
298: if (dn >= DK_NDRIVE) {
299: printf(" 0");
300: return;
301: }
302: printf("%3.0f", s.xfer[dn]/etime);
303: }
304:
305: double
306: stat1(row)
307: {
308: double t;
309: register i;
310:
311: t = 0;
312: for(i=0; i<CPUSTATES; i++)
313: t += s.time[i];
314: if(t == 0.)
315: t = 1.;
316: return(s.time[row]*100./t);
317: }
318:
319: pct(top, bot)
320: {
321:
322: if (bot == 0)
323: return (0);
324: return ((top * 100) / bot);
325: }
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