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lightning-sunbird  0.9+nobinonly
Classes | Defines | Functions | Variables
switch.cpp File Reference
#include "rccv.h"
#include "rcinrval.h"
#include "rclock.h"
#include "rcthread.h"
#include <prio.h>
#include <prlog.h>
#include <prprf.h>
#include <plerror.h>
#include <plgetopt.h>
#include <stdlib.h>

Go to the source code of this file.

Classes

class  Home
struct  Shared

Defines

#define INNER_LOOPS   100
#define DEFAULT_LOOPS   100
#define DEFAULT_THREADS   10

Functions

static void Help (void)
PRIntn main (PRIntn argc, char **argv)

Variables

static PRFileDescdebug_out = NULL
static PRBool debug_mode = PR_FALSE
static PRBool verbosity = PR_FALSE
static PRBool failed = PR_FALSE

Define Documentation

#define DEFAULT_LOOPS   100

Definition at line 57 of file switch.cpp.

Definition at line 58 of file switch.cpp.

#define INNER_LOOPS   100

Definition at line 56 of file switch.cpp.


Function Documentation

static void Help ( void  ) [static]

Definition at line 113 of file switch.cpp.

{
    debug_out = PR_STDOUT;

    PR_fprintf(
              debug_out, "Usage: >./switch [-d] [-c n] [-t n] [-T n] [-G]\n");
    PR_fprintf(
              debug_out, "-c n\tloops at thread level (default: %d)\n", DEFAULT_LOOPS);
    PR_fprintf(
              debug_out, "-t n\tnumber of threads (default: %d)\n", DEFAULT_THREADS);
    PR_fprintf(debug_out, "-d\tturn on debugging output (default: FALSE)\n");
    PR_fprintf(debug_out, "-v\tturn on verbose output (default: FALSE)\n");
    PR_fprintf(debug_out, "-G n\tglobal threads only (default: FALSE)\n");
    PR_fprintf(debug_out, "-C n\tconcurrency setting (default: 1)\n");
}  /* Help */
PRIntn main ( PRIntn  argc,
char **  argv 
)

Definition at line 129 of file switch.cpp.

{
       PLOptStatus os;
    PRStatus status;
    PRBool help = PR_FALSE;
    PRUintn concurrency = 1;
    RCThread::Scope thread_scope = RCThread::local;
    PRUintn thread_count, inner_count, loop_count, average;
    PRUintn thread_limit = DEFAULT_THREADS, loop_limit = DEFAULT_LOOPS;
       PLOptState *opt = PL_CreateOptState(argc, argv, "hdvc:t:C:G");
       while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
    {
              if (PL_OPT_BAD == os) continue;
        switch (opt->option)
        {
        case 'v':  /* verbose mode */
                     verbosity = PR_TRUE;
        case 'd':  /* debug mode */
                     debug_mode = PR_TRUE;
            break;
        case 'c':  /* loop counter */
                     loop_limit = atoi(opt->value);
            break;
        case 't':  /* thread limit */
                     thread_limit = atoi(opt->value);
            break;
        case 'C':  /* Concurrency limit */
                     concurrency = atoi(opt->value);
            break;
        case 'G':  /* global threads only */
                     thread_scope = RCThread::global;
            break;
        case 'h':  /* help message */
                     Help();
                     help = PR_TRUE;
            break;
         default:
            break;
        }
    }
       PL_DestroyOptState(opt);

    if (help) return -1;

       if (PR_TRUE == debug_mode)
       {
              debug_out = PR_STDOUT;
              PR_fprintf(debug_out, "Test parameters\n");
              PR_fprintf(debug_out, "\tThreads involved: %d\n", thread_limit);
              PR_fprintf(debug_out, "\tIteration limit: %d\n", loop_limit);
              PR_fprintf(debug_out, "\tConcurrency: %d\n", concurrency);
              PR_fprintf(
                     debug_out, "\tThread type: %s\n",
                     (PR_GLOBAL_THREAD == thread_scope) ? "GLOBAL" : "LOCAL");
       }

    /*
    ** The interesting part starts here
    */
    RCLock lock;
    Shared* shared;
    Home home(NULL, &lock);
    Home* link = &home;
    RCInterval timein, timeout = 0;

    /* Build up the string of objects */
    for (thread_count = 1; thread_count <= thread_limit; ++thread_count)
    {
        shared = new Shared(thread_scope, link, &lock);
        shared->Start();  /* make it run */
        link = (Home*)shared;
       }

    /* Pass the message around the horn a few times */
    for (loop_count = 1; loop_count <= loop_limit; ++loop_count)
    {
              timein.SetToNow();
              for (inner_count = 0; inner_count < INNER_LOOPS; ++inner_count)
              {
                     RCEnter entry(&lock);
                     home.twiddle = PR_TRUE;
                     shared->twiddle = PR_FALSE;
                     shared->Notify();
                     while (home.twiddle)
            {
                            failed = (PR_FAILURE == home.Wait()) ? PR_TRUE : PR_FALSE;
            }
              }
              timeout += (RCInterval(RCInterval::now) - timein);
       }

    /* Figure out how well we did */
       if (debug_mode)
       {
              average = timeout.ToMicroseconds()
                     / (INNER_LOOPS * loop_limit * thread_count);
              PR_fprintf(
                     debug_out, "Average switch times %d usecs for %d threads\n",
            average, thread_limit);
       }

    /* Start reclamation process */
    link = shared;
    for (thread_count = 1; thread_count <= thread_limit; ++thread_count)
    {
        if (&home == link) break;
        status = ((Shared*)link)->Interrupt();
              if (PR_SUCCESS != status)
        {
            failed = PR_TRUE;
            if (debug_mode)
                         PL_FPrintError(debug_out, "Failed to interrupt");
        }
              link = link->next; 
    }

    for (thread_count = 1; thread_count <= thread_limit; ++thread_count)
    {
        link = shared->next;
        status = shared->Join();
              if (PR_SUCCESS != status)
              {
            failed = PR_TRUE;
            if (debug_mode)
                         PL_FPrintError(debug_out, "Failed to join");
        }
        if (&home == link) break;
        shared = (Shared*)link;
    }

    PR_fprintf(PR_STDOUT, ((failed) ? "FAILED\n" : "PASSED\n"));

    failed |= (PR_SUCCESS == RCPrimordialThread::Cleanup());

    return ((failed) ? 1 : 0);
}  /* main */

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Variable Documentation

Definition at line 61 of file switch.cpp.

PRFileDesc* debug_out = NULL [static]

Definition at line 60 of file switch.cpp.

PRBool failed = PR_FALSE [static]

Definition at line 61 of file switch.cpp.

Definition at line 61 of file switch.cpp.