#include <stdio.h> #include <libc.h> #include <sys/param.h> #include <sys/vm.h> #include <nlist.h> #include <sys/meter.h> struct nlist nl[] = { #define X_CPTIME 0 { "_cp_time" }, #define X_RATE 1 { "_rate" }, #define X_TOTAL 2 { "_total" }, #define X_DEFICIT 3 { "_deficit" }, #define X_SUM 4 { "_sum" }, #define X_FIRSTFREE 5 { "_firstfree" }, #define X_MAXFREE 6 { "_maxfree" }, #define X_BOOTIME 7 { "_bootime" }, #define X_REC 8 { "_rectime" }, #define X_PGIN 9 { "_pgintime" }, { 0 }, }; double stat1(); int firstfree, maxfree; struct { int busy; long time[CPUSTATES]; struct vmmeter Rate; struct vmtotal Total; struct vmmeter Sum; unsigned rectime; unsigned pgintime; } s, s1, z; #define rate s.Rate #define total s.Total #define sum s.Sum int zero; int deficit; double etime; int mf; main(argc, argv) char **argv; { time_t now; int lines; extern char *ctime(); register i; int iter, nintv; time_t bootime; long t; extern char _sobuf[]; setbuf(stdout, _sobuf); nlist("/unix", nl); if(nl[0].n_type == 0) { printf("no /unix namelist\n"); exit(1); } mf = open("/dev/kmem", 0); if(mf < 0) { printf("cannot open /dev/kmem\n"); exit(1); } iter = 0; argc--, argv++; while (argc>0 && argv[0][0]=='-') { char *cp = *argv++; argc--; while (*++cp) switch (*cp) { case 't': dotimes(); exit(0); case 'z': close(mf); mf = open("/dev/kmem", 2); lseek(mf, (long)nl[X_SUM].n_value, 0); write(mf, &z.Sum, sizeof z.Sum); exit(0); case 's': dosum(); exit(0); default: fprintf(stderr, "usage: vmstat [ -fs ] [ interval ] [ count]\n"); exit(1); } } if(argc > 1) iter = atoi(argv[1]); lseek(mf, (long)nl[X_FIRSTFREE].n_value, 0); read(mf, &firstfree, sizeof firstfree); lseek(mf, (long)nl[X_MAXFREE].n_value, 0); read(mf, &maxfree, sizeof maxfree); lseek(mf, (long)nl[X_BOOTIME].n_value, 0); read(mf, &bootime, sizeof bootime); time(&now); nintv = now - bootime; if (nintv <= 0 || nintv > 60*60*24*365*10) { printf("Time makes no sense... namelist must be wrong.\n"); exit(1); } reprint: lines = 20; /* s1 = z; */ printf("\ procs| memory | page | | cpu\n\ r b w avm fre re at pi po fr de sr sy cs us sy id st\n"); loop: lseek(mf, (long)nl[X_CPTIME].n_value, 0); read(mf, s.time, sizeof s.time); if (nintv != 1) { lseek(mf, (long)nl[X_SUM].n_value, 0); read(mf, &rate, sizeof rate); } else { lseek(mf, (long)nl[X_RATE].n_value, 0); read(mf, &rate, sizeof rate); } lseek(mf, (long)nl[X_TOTAL].n_value, 0); read(mf, &total, sizeof total); lseek(mf, (long)nl[X_DEFICIT].n_value, 0); read(mf, &deficit, sizeof deficit); etime = 0; for (i=0; i < CPUSTATES; i++) { t = s.time[i]; s.time[i] -= s1.time[i]; s1.time[i] = t; etime += s.time[i]; } if(etime == 0.) etime = 1.; printf("%2d %d %d", total.t_rq, total.t_dw+total.t_pw, total.t_sw); printf(" %6d %6d", total.t_avm/CLSIZE, total.t_free/CLSIZE); printf(" %3d %3d %3d", (rate.v_pgrec - (rate.v_xsfrec+rate.v_xifrec))/nintv, (rate.v_xsfrec+rate.v_xifrec)/nintv, rate.v_pgpgin/CLSIZE/nintv); printf(" %3d %3d %3d %3d", rate.v_pgpgout/CLSIZE/nintv, rate.v_dfree/CLSIZE/nintv, deficit/CLSIZE, rate.v_scan/nintv); etime /= 60.; printf(" %3d", rate.v_syscall/nintv); printf(" %3d", rate.v_swtch/nintv); for(i=0; i<CPUSTATES; i++) { float f = stat1(i); if (i == 0) { /* US+NI */ i++; f += stat1(i); } printf("%3.0f", f); } printf("\n"); fflush(stdout); nintv = 1; --iter; if(iter) if(argc > 0) { sleep(atoi(argv[0])); if (--lines <= 0) goto reprint; goto loop; } } dotimes() { lseek(mf, (long)nl[X_REC].n_value, 0); read(mf, &s.rectime, sizeof s.rectime); lseek(mf, (long)nl[X_PGIN].n_value, 0); read(mf, &s.pgintime, sizeof s.pgintime); lseek(mf, (long)nl[X_SUM].n_value, 0); read(mf, &sum, sizeof sum); printf("%d reclaims, %d total time (usec)\n", sum.v_pgrec, s.rectime); printf("average: %d usec / reclaim\n", s.rectime/sum.v_pgrec); printf("\n"); printf("%d page ins, %d total time (msec)\n",sum.v_pgin, s.pgintime/10); printf("average: %8.1f msec / page in\n", s.pgintime/(sum.v_pgin*10.0)); } dosum() { lseek(mf, (long)nl[X_SUM].n_value, 0); read(mf, &sum, sizeof sum); printf("%9d swap ins\n", sum.v_swpin); printf("%9d swap outs\n", sum.v_swpout); printf("%9d pages swapped in\n", sum.v_pswpin / CLSIZE); printf("%9d pages swapped out\n", sum.v_pswpout / CLSIZE); printf("%9d total address trans. faults taken\n", sum.v_faults); printf("%9d page ins\n", sum.v_pgin); printf("%9d page outs\n", sum.v_pgout); printf("%9d pages paged in\n", sum.v_pgpgin); printf("%9d pages paged out\n", sum.v_pgpgout); printf("%9d sequential process pages freed\n", sum.v_seqfree); printf("%9d total reclaims\n", sum.v_pgrec); printf("%9d reclaims from free list\n", sum.v_pgfrec); printf("%9d intransit blocking page faults\n", sum.v_intrans); printf("%9d zero fill pages created\n", sum.v_nzfod / CLSIZE); printf("%9d zero fill page faults\n", sum.v_zfod / CLSIZE); printf("%9d executable fill pages created\n", sum.v_nexfod / CLSIZE); printf("%9d executable fill page faults\n", sum.v_exfod / CLSIZE); printf("%9d swap text pages found in free list\n", sum.v_xsfrec); printf("%9d inode text pages found in free list\n", sum.v_xifrec); printf("%9d pages examined by the clock daemon\n", sum.v_scan); printf("%9d revolutions of the clock hand\n", sum.v_rev); printf("%9d pages freed by the clock daemon\n", sum.v_dfree / CLSIZE); printf("%9d cpu context switches\n", sum.v_swtch); printf("%9d traps\n", sum.v_trap); printf("%9d system calls\n", sum.v_syscall); } double stat1(row) { double t; register i; t = 0; for(i=0; i<CPUSTATES; i++) t += s.time[i]; if(t == 0.) t = 1.; return(s.time[row]*100./t); } pct(top, bot) { if (bot == 0) return (0); return ((top * 100) / bot); }