[2] | 1 | /* |
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| 2 | * $Source: /afs/dev.mit.edu/source/repository/athena/bin/mon/io.c,v $ |
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| 3 | * $Author: dgg $ |
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| 4 | * $Locker: $ |
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| 5 | * $Header: /afs/dev.mit.edu/source/repository/athena/bin/mon/io.c,v 1.1 1984-12-13 12:00:44 dgg Exp $ |
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| 6 | */ |
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| 7 | |
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| 8 | #ifndef lint |
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| 9 | static char *rcsid_io_c = "$Header: /afs/dev.mit.edu/source/repository/athena/bin/mon/io.c,v 1.1 1984-12-13 12:00:44 dgg Exp $"; |
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| 10 | #endif lint |
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| 11 | |
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| 12 | /* |
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| 13 | * I O |
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| 14 | * |
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| 15 | * Purpose: Read the kernel's I/O statistics and display selected |
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| 16 | * parameters about terminals and disks. |
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| 17 | * |
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| 18 | */ |
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| 19 | |
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| 20 | #include "mon.h" |
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| 21 | |
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| 22 | double kbps, tps; /* Kbytes/sec and xfers/sec */ |
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| 23 | int lasty; /* Last disk y location */ |
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| 24 | |
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| 25 | /* Temporary Defines - All output should be moved to dispinfo */ |
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| 26 | #include <curses.h> |
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| 27 | #define CHARX 37 |
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| 28 | #define CHARY 5 |
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| 29 | #define DISKX 55 |
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| 30 | #define DISKY 2 |
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| 31 | #define DISKOFF 6 |
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| 32 | #define DISKWDS DISKOFF |
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| 33 | #define DISKXFER DISKOFF+4 |
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| 34 | #define DISKSEEK DISKOFF+8 |
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| 35 | |
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| 36 | io() |
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| 37 | { |
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| 38 | int y; |
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| 39 | register i; |
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| 40 | long t; |
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| 41 | double tkbps, ttps; /* Totals for all drives */ |
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| 42 | |
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| 43 | lseek(kmem, (long)namelist[X_DK_TIME].n_value, 0); |
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| 44 | read(kmem, s.dk_time, sizeof s.dk_time); |
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| 45 | lseek(kmem, (long)namelist[X_DK_XFER].n_value, 0); |
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| 46 | read(kmem, s.dk_xfer, sizeof s.dk_xfer); |
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| 47 | lseek(kmem, (long)namelist[X_DK_WDS].n_value, 0); |
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| 48 | read(kmem, s.dk_wds, sizeof s.dk_wds); |
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| 49 | lseek(kmem, (long)namelist[X_TK_NIN].n_value, 0); |
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| 50 | read(kmem, &s.tk_nin, sizeof s.tk_nin); |
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| 51 | lseek(kmem, (long)namelist[X_TK_NOUT].n_value, 0); |
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| 52 | read(kmem, &s.tk_nout, sizeof s.tk_nout); |
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| 53 | lseek(kmem, (long)namelist[X_DK_SEEK].n_value, 0); |
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| 54 | read(kmem, s.dk_seek, sizeof s.dk_seek); |
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| 55 | lseek(kmem, (long)namelist[X_DK_MSPW].n_value, 0); |
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| 56 | read(kmem, s.dk_mspw, sizeof s.dk_mspw); |
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| 57 | lseek(kmem, (long)namelist[X_HZ].n_value, 0); |
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| 58 | read(kmem, &hz, sizeof hz); |
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| 59 | for (i = 0; i < DK_NDRIVE; i++) { |
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| 60 | #define X(fld) t = s.fld[i]; s.fld[i] -= s1.fld[i]; s1.fld[i] = t |
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| 61 | X(dk_xfer); X(dk_seek); X(dk_wds); X(dk_time); |
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| 62 | } |
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| 63 | t = s.tk_nin; s.tk_nin -= s1.tk_nin; s1.tk_nin = t; |
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| 64 | t = s.tk_nout; s.tk_nout -= s1.tk_nout; s1.tk_nout = t; |
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| 65 | |
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| 66 | /* output character I/O counts */ |
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| 67 | mvprintw(CHARY+1,CHARX+4,"%4.0f %5.0f", s.tk_nin/etime, s.tk_nout/etime); |
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| 68 | |
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| 69 | /* Display Drive statistics */ |
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| 70 | tkbps = ttps = 0; |
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| 71 | for (i=0; i<DK_NDRIVE; i++) { |
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| 72 | if (stats(i)) { |
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| 73 | tkbps += kbps; |
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| 74 | ttps += tps; |
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| 75 | } |
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| 76 | } |
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| 77 | /* Display Totals */ |
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| 78 | mvprintw(lasty+2, DISKX+DISKOFF, "%4.0f%4.0f", tkbps, ttps); |
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| 79 | } |
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| 80 | |
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| 81 | /* |
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| 82 | * Display statistics for dk drive number dn. |
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| 83 | * Returns 1 if totals should be updated. |
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| 84 | */ |
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| 85 | stats(dn) |
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| 86 | { |
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| 87 | int y; |
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| 88 | register i; |
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| 89 | double atime, words, xtime, itime; |
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| 90 | |
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| 91 | /* only display info for named (real) devices */ |
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| 92 | if (!*dr_name[dn]) |
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| 93 | return(0); |
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| 94 | |
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| 95 | y = dn + DISKY+1; |
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| 96 | lasty = y; |
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| 97 | if (s.dk_mspw[dn] == 0.0) { |
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| 98 | mvprintw(y,DISKX+DISKOFF,"%4.0f%4.0f%6.1f ", 0.0, 0.0, 0.0); |
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| 99 | return(0); |
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| 100 | } |
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| 101 | atime = s.dk_time[dn]; |
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| 102 | atime /= (float) hz; |
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| 103 | words = s.dk_wds[dn]*32.0; /* number of 16 bit words transferred */ |
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| 104 | xtime = s.dk_mspw[dn]*words; /* transfer time */ |
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| 105 | itime = atime - xtime; /* time not transferring (seek time) */ |
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| 106 | |
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| 107 | if (xtime < 0) |
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| 108 | itime += xtime, xtime = 0; |
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| 109 | if (itime < 0) |
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| 110 | xtime += itime, itime = 0; |
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| 111 | |
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| 112 | /* Avg Kbps, transfers/sec, avg seek time (in msec) */ |
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| 113 | kbps = words/512/etime; |
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| 114 | tps = s.dk_xfer[dn]/etime; |
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| 115 | mvprintw(y,DISKX+DISKWDS,"%4.0f", kbps); |
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| 116 | mvprintw(y,DISKX+DISKXFER,"%4.0f", tps); |
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| 117 | mvprintw(y,DISKX+DISKSEEK,"%6.1f ", |
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| 118 | s.dk_seek[dn] ? itime*1000./s.dk_seek[dn] : 0.0); |
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| 119 | |
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| 120 | return(1); /* Update totals */ |
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| 121 | } |
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| 122 | |
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| 123 | |
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