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/*

 * Copyright (C) 2006 Ondrej Palkovsky

 * All rights reserved.

 *

 * Redistribution and use in source and binary forms, with or without

 * modification, are permitted provided that the following conditions

 * are met:

 *

 * - Redistributions of source code must retain the above copyright

 *   notice, this list of conditions and the following disclaimer.

 * - Redistributions in binary form must reproduce the above copyright

 *   notice, this list of conditions and the following disclaimer in the

 *   documentation and/or other materials provided with the distribution.

 * - The name of the author may not be used to endorse or promote products

 *   derived from this software without specific prior written permission.

 *

 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR

 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES

 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.

 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,

 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT

 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,

 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY

 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT

 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF

 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

 */

#include <test.h>

#include <mm/slab.h>

#include <print.h>

#include <proc/thread.h>

#include <arch.h>

#include <panic.h>

#include <mm/frame.h>

#include <memstr.h>

#include <synch/condvar.h>

#include <synch/mutex.h>

#ifdef CONFIG_BENCH

#include <arch/cycle.h>

#endif

#define ITEM_SIZE 256

/** Fill memory with 2 caches, when allocation fails,

 *  free one of the caches. We should have everything in magazines,

 *  now allocation should clean magazines and allow for full allocation.

 */

static void totalmemtest(void)

{

    slab_cache_t *cache1;

    slab_cache_t *cache2;

    int i;

    void *data1, *data2;

    void *olddata1=NULL, *olddata2=NULL;

    cache1 = slab_cache_create("cache1_tst", ITEM_SIZE, 0, NULL, NULL, 0);

    cache2 = slab_cache_create("cache2_tst", ITEM_SIZE, 0, NULL, NULL, 0);

    printf("Allocating...");

    /* Use atomic alloc, so that we find end of memory */

    do {

        data1 = slab_alloc(cache1, FRAME_ATOMIC);

        data2 = slab_alloc(cache2, FRAME_ATOMIC);

        if (!data1 || !data2) {

            if (data1)

                slab_free(cache1,data1);

            if (data2)

                slab_free(cache2,data2);

            break;

        }

        memsetb((uintptr_t)data1, ITEM_SIZE, 0);

        memsetb((uintptr_t)data2, ITEM_SIZE, 0);

        *((void **)data1) = olddata1;

        *((void **)data2) = olddata2;

        olddata1 = data1;

        olddata2 = data2;

    }while(1);

    printf("done.\n");

    /* We do not have memory - now deallocate cache2 */

    printf("Deallocating cache2...");

    while (olddata2) {

        data2 = *((void **)olddata2);

        slab_free(cache2, olddata2);

        olddata2 = data2;

    }

    printf("done.\n");

    printf("Allocating to cache1...\n");

    for (i=0; i<30; i++) {

        data1 = slab_alloc(cache1, FRAME_ATOMIC);

        if (!data1) {

            panic("Incorrect memory size - use another test.");

        }

        memsetb((uintptr_t)data1, ITEM_SIZE, 0);

        *((void **)data1) = olddata1;

        olddata1 = data1;

    }

    while (1) {

        data1 = slab_alloc(cache1, FRAME_ATOMIC);

        if (!data1) {

            break;

        }

        memsetb((uintptr_t)data1, ITEM_SIZE, 0);

        *((void **)data1) = olddata1;

        olddata1 = data1;

    }

    printf("Deallocating cache1...");

    while (olddata1) {

        data1 = *((void **)olddata1);

        slab_free(cache1, olddata1);

        olddata1 = data1;

    }

    printf("done.\n");

    slab_print_list();

    slab_cache_destroy(cache1);

    slab_cache_destroy(cache2);

}

static slab_cache_t *thr_cache;

static semaphore_t thr_sem;

static condvar_t thread_starter;

static mutex_t starter_mutex;

#define THREADS 8

static void slabtest(void *priv)

{

    void *data=NULL, *new;

    thread_detach(THREAD);

    mutex_lock(&starter_mutex);

    condvar_wait(&thread_starter,&starter_mutex);

    mutex_unlock(&starter_mutex);

    printf("Starting thread #%d...\n",THREAD->tid);

    /* Alloc all */

    printf("Thread #%d allocating...\n", THREAD->tid);

    while (1) {

        /* Call with atomic to detect end of memory */

        new = slab_alloc(thr_cache, FRAME_ATOMIC);

        if (!new)

            break;

        *((void **)new) = data;

        data = new;

    }

    printf("Thread #%d releasing...\n", THREAD->tid);

    while (data) {

        new = *((void **)data);

        *((void **)data) = NULL;

        slab_free(thr_cache, data);

        data = new;

    }

    printf("Thread #%d allocating...\n", THREAD->tid);

    while (1) {

        /* Call with atomic to detect end of memory */

        new = slab_alloc(thr_cache, FRAME_ATOMIC);

        if (!new)

            break;

        *((void **)new) = data;

        data = new;

    }

    printf("Thread #%d releasing...\n", THREAD->tid);

    while (data) {

        new = *((void **)data);

        *((void **)data) = NULL;

        slab_free(thr_cache, data);

        data = new;

    }

    printf("Thread #%d finished\n", THREAD->tid);

    slab_print_list();

    semaphore_up(&thr_sem);

}

static void multitest(int size)

{

    /* Start 8 threads that just allocate as much as possible,

     * then release everything, then again allocate, then release

     */

    thread_t *t;

    int i;

    printf("Running stress test with size %d\n", size);

    condvar_initialize(&thread_starter);

    mutex_initialize(&starter_mutex);

    thr_cache = slab_cache_create("thread_cache", size, 0,

                      NULL, NULL,

                      0);

    semaphore_initialize(&thr_sem,0);

    for (i=0; i<THREADS; i++) {  

        if (!(t = thread_create(slabtest, NULL, TASK, 0, "slabtest")))

            panic("could not create thread\n");

        thread_ready(t);

    }

    thread_sleep(1);

    condvar_broadcast(&thread_starter);

    for (i=0; i<THREADS; i++)

        semaphore_down(&thr_sem);

    slab_cache_destroy(thr_cache);

    printf("Stress test complete.\n");

}

void test_slab2(void)

{

#ifdef CONFIG_BENCH

    uint64_t t0 = get_cycle();

#endif

    printf("Running reclaim single-thread test .. pass1\n");

    totalmemtest();

    printf("Running reclaim single-thread test .. pass2\n");

    totalmemtest();

    printf("Reclaim test OK.\n");

    multitest(128);

    multitest(2048);

    multitest(8192);

    printf("All done.\n");

#ifdef CONFIG_BENCH

    uint64_t dt = get_cycle() - t0;

    printf("Time: %.*d cycles\n", sizeof(dt) * 2, dt);

#endif

}