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/*

 * Copyright (C) 2010 B Labs Ltd.

 *

 * l4_getid performance tests

 *

 * Author: Bahadir Balban

 */

#include <l4lib/macros.h>

#include L4LIB_INC_ARCH(syslib.h)

#include L4LIB_INC_ARCH(syscalls.h)

#include <l4lib/lib/thread.h>

#include <l4lib/perfmon.h>

#include <perf.h>

#include <tests.h>

#include <string.h>

struct perfmon_cycles simple_cycles;

#define PERFTEST_SIMPLE_LOOP    2000

void perf_test_simple(void)

{

        dbg_printf("%s: This will test the cycle count of basic loops.\n",

                   __FUNCTION__);

        /*

         * Initialize structures

         */

        memset(&simple_cycles, 0, sizeof(struct perfmon_cycles));

        simple_cycles.min = ~0; /* Init as maximum possible */

        /*

         * Do the test

         */

        perfmon_reset_start_cyccnt();

        for (int i = 0; i < PERFTEST_SIMPLE_LOOP; i++)

                ;

        perfmon_record_cycles(&simple_cycles,"empty_loop");

        /*

         * Calculate average

         */

        simple_cycles.avg = simple_cycles.total / simple_cycles.ops;

        /*

         * Print results

         */

        printf("%s took %llu min, %llu max, %llu avg, in %llu ops.\n",

               "simple loop",

               simple_cycles.min * USEC_MULTIPLIER,

               simple_cycles.max * USEC_MULTIPLIER,

               simple_cycles.avg * USEC_MULTIPLIER,

               simple_cycles.ops);

}