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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