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/*

 * Copyright (C) 2010 B Labs Ltd.

 *

 * l4_thread_control 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 tctrl_cycles;

#define PERFTEST_THREAD_CREATE                  50

void perf_measure_tctrl(void)

{

        struct task_ids ids[PERFTEST_THREAD_CREATE];

        struct task_ids selfids;

        l4_getid(&selfids);

        /*

         * Initialize structures

         */

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

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

        /*

         * Thread create test

         */

        for (int i = 0; i < PERFTEST_THREAD_CREATE; i++) {

                perfmon_reset_start_cyccnt();

                l4_thread_control(THREAD_CREATE | TC_SHARE_SPACE, &selfids);

                perfmon_record_cycles(&tctrl_cycles, "THREAD_CREATE");

                /* Copy ids of created task */

                memcpy(&ids[i], &selfids, sizeof(struct task_ids));

        }

        /*

         * Calculate average

         */

        tctrl_cycles.avg = tctrl_cycles.total / tctrl_cycles.ops;

        /*

         * Print results

         */

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

               "THREAD_CREATE",

               tctrl_cycles.min * USEC_MULTIPLIER,

               tctrl_cycles.max * USEC_MULTIPLIER,

               tctrl_cycles.avg * USEC_MULTIPLIER,

               tctrl_cycles.ops);

        /*

         * Thread destroy test

         */

        for (int i = 0; i < PERFTEST_THREAD_CREATE; i++) {

                perfmon_reset_start_cyccnt();

                l4_thread_control(THREAD_DESTROY, &ids[i]);

                perfmon_record_cycles(&tctrl_cycles,"THREAD_DESTROY");

        }

        /*

         * Calculate average

         */

        tctrl_cycles.avg = tctrl_cycles.total / tctrl_cycles.ops;

        /*

         * Print results

         */

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

               "THREAD_DESTROY",

               tctrl_cycles.min * USEC_MULTIPLIER,

               tctrl_cycles.max * USEC_MULTIPLIER,

               tctrl_cycles.avg * USEC_MULTIPLIER,

               tctrl_cycles.ops);

}