| 1 | /* $Id: PrfTstProcess.c,v 1.4 2003-05-01 11:20:50 bird Exp $
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| 2 | *
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| 3 | * Test program which checks how long it takes to execute another
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| 4 | * instance of itself and run
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| 5 | *
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| 6 | * Copyright (c) 2001 knut st. osmundsen (knut.stange.osmundsen@mynd.no)
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| 7 | *
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| 8 | * Project Odin Software License can be found in LICENSE.TXT
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| 9 | *
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| 10 | */
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| 11 |
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| 12 | /** @design Process Startup and Termination cost.
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| 13 | *
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| 14 | * The purpose is to compare the cost of creating a child process on different
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| 15 | * platforms; revealing which is the best ones...
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| 16 | *
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| 17 | * Later analysis on why will be done I hope...
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| 18 | *
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| 19 | *
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| 20 | * @subsection Test Results
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| 21 | *
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| 22 | * Linux version 2.4.5 (SMP) Pentium III 700Mhz- GCC:
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| 23 | * 0.001845 - 0.001845 sec (pid=193c)
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| 24 | * 0.001832 - 0.001832 sec (pid=193e)
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| 25 | * 0.001792 - 0.001792 sec (pid=1940)
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| 26 | * 0.001899 - 0.001899 sec (pid=1942)
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| 27 | *
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| 28 | * OS/2 WS4eB 4.5 FP 2 (SMP) Pentium III 600Mhz - Watcom -Otx:
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| 29 | * 5150.000000 - 0.004316 sec (pid=0)
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| 30 | * 5175.000000 - 0.004337 sec (pid=0)
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| 31 | * 5143.000000 - 0.004310 sec (pid=0)
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| 32 | * 5181.000000 - 0.004342 sec (pid=0)
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| 33 | *
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| 34 | * OS/2 WS4eB 4.5 FP 2 (SMP) Pentium III 600Mhz - Watcom (no optimization):
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| 35 | * 5510.000000 - 0.004618 sec (pid=0)
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| 36 | * 5500.000000 - 0.004610 sec (pid=0)
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| 37 | * 5489.000000 - 0.004600 sec (pid=0)
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| 38 | * 5551.000000 - 0.004652 sec (pid=0)
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| 39 | *
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| 40 | * OS/2 WS4eB 4.5 FP 2 (SMP) Pentium III 600Mhz - VAC308:
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| 41 | * 6490.000000 - 0.005439 sec (pid=0)
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| 42 | * 6465.000000 - 0.005418 sec (pid=0)
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| 43 | * 6501.000000 - 0.005449 sec (pid=0)
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| 44 | * 6496.000000 - 0.005444 sec (pid=0)
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| 45 | *
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| 46 | * Citrix Server (NT4) (SMP) Pentium III 800Mhz - Watcom -Otx:
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| 47 | * 4380885.000000 - 0.005493 sec (pid=0) (Hz: 797510000)
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| 48 | * 4411477.000000 - 0.005532 sec (pid=0)
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| 49 | * 4339893.000000 - 0.005442 sec (pid=0)
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| 50 | * 4349910.000000 - 0.005454 sec (pid=0)
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| 51 | *
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| 52 | * Citrix Server (NT4) (SMP) Pentium III 800Mhz - Watcom (no optimization):
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| 53 | * 4351488.000000 - 0.005456 sec (pid=0) (Hz: 797510000)
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| 54 | * 4411035.000000 - 0.005531 sec (pid=0)
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| 55 | * 4362396.000000 - 0.005470 sec (pid=0)
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| 56 | * 4374720.000000 - 0.005485 sec (pid=0)
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| 57 | *
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| 58 | * OS/2 WS4eB 4.5 FP 2 (SMP) Pentium III 600Mhz - VAC365:
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| 59 | * 6743.000000 - 0.005651 sec (pid=0)
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| 60 | * 6694.000000 - 0.005610 sec (pid=0)
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| 61 | * 6705.000000 - 0.005619 sec (pid=0)
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| 62 | * 7025.000000 - 0.005888 sec (pid=0)
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| 63 | *
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| 64 | * OS/2 WS4eB 4.5 FP 2 (SMP) Pentium III 600Mhz - EMX -D__OS2__:
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| 65 | * 15339.000000 - 0.012856 sec (pid=0)
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| 66 | * 15507.000000 - 0.012997 sec (pid=0)
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| 67 | * 15224.000000 - 0.012759 sec (pid=0)
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| 68 | * 15714.000000 - 0.013170 sec (pid=0)
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| 69 | *
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| 70 | * OS/2 WS4eB 4.5 FP 2 (SMP) Pentium III 600Mhz - EMX -D__OS2__ -D__NOTPC__:
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| 71 | * 31992.000000 - 0.026813 sec (pid=1c7f)
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| 72 | * 32300.000000 - 0.027071 sec (pid=1c82)
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| 73 | * 31699.000000 - 0.026567 sec (pid=1c85)
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| 74 | * 33570.000000 - 0.028135 sec (pid=1c88)
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| 75 | *
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| 76 | * @subsection Compilation OS/2
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| 77 | * Just as normal odin apps:<br>
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| 78 | * nmake -f prftstprocess.mak
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| 79 | *
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| 80 | * @subsection Complation NT
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| 81 | * This works from OS/2 and NT:
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| 82 | * wcl386 -d__WINNT__=1 -bt=nt /lnt -I%WATCOM\h\nt PrfTstProcess.c kernel32.lib
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| 83 | *
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| 84 | * Optimized:
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| 85 | * wcl386 -Otx -d__WINNT__=1 -bt=nt /lnt -I%WATCOM\h\nt PrfTstProcess.c kernel32.lib
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| 86 | *
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| 87 | */
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| 88 |
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| 89 | #include "PrfTiming.h"
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| 90 |
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| 91 |
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| 92 | int main(int argc, char **argv)
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| 93 | {
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| 94 | long double rdStart;
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| 95 | long double rdEnd;
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| 96 | int pid;
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| 97 | #ifdef __NOTPC__
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| 98 | int status;
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| 99 | #endif
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| 100 |
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| 101 | /*
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| 102 | * Child process test.
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| 103 | */
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| 104 | if (argc != 1)
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| 105 | return 0;
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| 106 |
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| 107 | /*
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| 108 | * Main process.
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| 109 | */
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| 110 | rdStart = gettime();
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| 111 | #ifndef __NOTPC__
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| 112 | pid = spawnl(P_WAIT, argv[0], argv[0], "child", NULL); /* pid == 0 on success */
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| 113 | #else
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| 114 | pid = fork();
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| 115 | if (pid == 0)
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| 116 | {/* child code */
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| 117 | execl(argv[0], argv[0], "child", NULL);
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| 118 | fprintf(stderr, "we should NEVER be here!!\n");
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| 119 | return 0;
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| 120 | }
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| 121 | if (pid > 0)
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| 122 | pid = wait(&status);
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| 123 | #endif
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| 124 | rdEnd = gettime();
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| 125 | printf("%Lf - %Lf sec (pid=%x)\n", rdEnd - rdStart, (rdEnd - rdStart) / getHz(), pid);
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| 126 | printf("(start: %Lf end: %Lf Hz: %d\n", rdStart, rdEnd, getHz());
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| 127 | printSystemInfo();
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| 128 | return 0;
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| 129 | }
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