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//==========================================================================

//

//        timeslice.c

//

//        Timeslice test

//

//==========================================================================

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// -------------------------------------------

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//==========================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):     nickg

// Contributors:  nickg

// Date:          2001-06-18

// Description:   A basic timeslicing test.

//

//####DESCRIPTIONEND####

//==========================================================================

#include <pkgconf/kernel.h>

#include <pkgconf/hal.h>

#include <cyg/hal/hal_arch.h>

#include <cyg/kernel/smp.hxx>

#include <cyg/kernel/kapi.h>

#include <cyg/infra/testcase.h>

#include <cyg/infra/diag.h>

//==========================================================================

#if defined(CYGSEM_KERNEL_SCHED_TIMESLICE) &&   \

    defined(CYGFUN_KERNEL_API_C) &&             \

    defined(CYGSEM_KERNEL_SCHED_MLQUEUE) &&     \

    defined(CYGVAR_KERNEL_COUNTERS_CLOCK) &&    \

    !defined(CYGDBG_INFRA_DIAG_USE_DEVICE) &&   \

    (CYGNUM_KERNEL_SCHED_PRIORITIES > 12)

//==========================================================================

#define STACK_SIZE CYGNUM_HAL_STACK_SIZE_TYPICAL*5

#define NTHREADS_MAX (CYGNUM_KERNEL_CPU_MAX*6)

static int ncpus = CYGNUM_KERNEL_CPU_MAX;

static char test_stack[STACK_SIZE];

static cyg_thread test_thread;

static cyg_handle_t main_thread;

static char stacks[NTHREADS_MAX][STACK_SIZE];

static cyg_thread test_threads[NTHREADS_MAX];

static cyg_handle_t threads[NTHREADS_MAX];

static volatile int failed = false;

static volatile cyg_uint32 slicerun[NTHREADS_MAX][CYGNUM_KERNEL_CPU_MAX];

//==========================================================================

void

test_thread_timeslice(CYG_ADDRESS id)

{

    for(;;)

        slicerun[id][CYG_KERNEL_CPU_THIS()]++;

}

//==========================================================================

void run_test_timeslice(int nthread)

{

    int i,j;

    cyg_uint32 cpu_total[CYGNUM_KERNEL_CPU_MAX];

    cyg_uint32 cpu_threads[CYGNUM_KERNEL_CPU_MAX];

    cyg_uint32 thread_total[NTHREADS_MAX];

    CYG_TEST_INFO( "Timeslice Test: Check timeslicing works");

    // Init flags.

    for (i = 0;  i < nthread;  i++)

        for( j = 0; j < ncpus; j++ )

            slicerun[i][j] = 0;

    // Set my priority higher than any I plan to create

    cyg_thread_set_priority(cyg_thread_self(), 2);

    for (i = 0;  i < nthread;  i++) {

        cyg_thread_create(10,              // Priority - just a number

                          test_thread_timeslice, // entry

                          i,               // index

                          "test_thread",     // Name

                          &stacks[i][0],   // Stack

                          STACK_SIZE,      // Size

                          &threads[i],     // Handle

                          &test_threads[i] // Thread data structure

            );

        cyg_thread_resume( threads[i]);

    }

    // Just wait a while, until the threads have all run for a bit.

    cyg_thread_delay( CYGNUM_KERNEL_SCHED_TIMESLICE_TICKS*100 );

    // Suspend all the threads

    for (i = 0;  i < nthread;  i++) {

        cyg_thread_suspend(threads[i]);

    }

    // And check that a thread ran on each CPU, and that each thread

    // ran.

    diag_printf(" Thread ");

    for( j = 0; j < ncpus; j++ )

    {

        cpu_total[j] = 0;

        cpu_threads[j] = 0;

        // "  %11d"  __123456789ab"

        diag_printf("       CPU %2d",j);

    }

    // "  %11d"  __123456789ab"

    diag_printf("        Total\n");

    for (i = 0;  i < nthread;  i++)

    {

        thread_total[i] = 0;

        diag_printf("     %2d ",i);

        for( j = 0; j < ncpus; j++ )

        {

            thread_total[i] += slicerun[i][j];

            cpu_total[j] += slicerun[i][j];

            if( slicerun[i][j] > 0 )

                cpu_threads[j]++;

            diag_printf("  %11d",slicerun[i][j]);

        }

        diag_printf("  %11d\n",thread_total[i]);

        if( thread_total[i] == 0 )

            failed++;

    }

    diag_printf(" Total  ");

    for( j = 0; j < ncpus; j++ )

        diag_printf("  %11d",cpu_total[j]);

    diag_printf("\n");

    diag_printf("Threads ");

    for( j = 0; j < ncpus; j++ )

    {

        diag_printf("  %11d",cpu_threads[j]);

        if( cpu_threads[j] < 2 )

            failed++;

    }

    diag_printf("\n");

    // Delete all the threads

    for (i = 0;  i < nthread;  i++) {

        cyg_thread_delete(threads[i]);

    }

    CYG_TEST_INFO( "Timeslice Test: done");

}

//==========================================================================

void

run_tests(CYG_ADDRESS id)

{

    int step;

    int nthread;

    // Try to run about 10 times in total, with varying numbers of threads

    // from only one extra up to the full set:

    step = (NTHREADS_MAX - (1 + CYG_KERNEL_CPU_COUNT()))/10;

    if( step == 0 ) step = 1;

    for( nthread = 1 + CYG_KERNEL_CPU_COUNT() ;

         nthread <= NTHREADS_MAX ;

         nthread += step )

            run_test_timeslice(nthread);

    if( failed )

        CYG_TEST_FAIL_FINISH("Timeslice test failed\n");

    CYG_TEST_PASS_FINISH("Timeslice test OK");

}

//==========================================================================

void timeslice_main( void )

{

    CYG_TEST_INIT();

    // Work out how many CPUs we actually have.

    ncpus = CYG_KERNEL_CPU_COUNT();

    cyg_thread_create(0,              // Priority - just a number

                      run_tests, // entry

                      0,               // index

                      "run_tests",     // Name

                      test_stack,   // Stack

                      STACK_SIZE,      // Size

                      &main_thread,     // Handle

                      &test_thread // Thread data structure

        );

    cyg_thread_resume( main_thread);

    cyg_scheduler_start();

}

//==========================================================================

#ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG

externC void

cyg_hal_invoke_constructors();

#endif

externC void

cyg_start( void )

{

#ifdef CYGSEM_HAL_STOP_CONSTRUCTORS_ON_FLAG

    cyg_hal_invoke_constructors();

#endif

    timeslice_main();

}

//==========================================================================

#else // CYGSEM_KERNEL_SCHED_TIMESLICE etc

externC void

cyg_start( void )

{

    CYG_TEST_INIT();

    CYG_TEST_NA("SMP test requires:\n"

                "CYGSEM_KERNEL_SCHED_TIMESLICE &&\n"

                "CYGPKG_KERNEL_SMP_SUPPORT &&\n"

                "CYGFUN_KERNEL_API_C && \n"

                "CYGSEM_KERNEL_SCHED_MLQUEUE &&\n"

                "CYGVAR_KERNEL_COUNTERS_CLOCK &&\n"

                "!CYGPKG_HAL_I386_LINUX &&\n"

                "!CYGDBG_INFRA_DIAG_USE_DEVICE &&\n"

                "(CYGNUM_KERNEL_SCHED_PRIORITIES > 12)\n");

}

#endif // CYGSEM_KERNEL_SCHED_TIMESLICE etc.

//==========================================================================

// EOF timeslice.c