0,0 → 1,198 |
/* |
* Copyright (c) 2001-2004 Jakub Jermar |
* 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 <arch.h> |
#include <atomic.h> |
#include <print.h> |
#include <proc/thread.h> |
#include <arch/types.h> |
#include <arch/context.h> |
#include <context.h> |
|
#include <synch/waitq.h> |
#include <synch/rwlock.h> |
#include <synch/synch.h> |
#include <synch/spinlock.h> |
|
#define READERS 50 |
#define WRITERS 50 |
|
static atomic_t thread_count; |
static rwlock_t rwlock; |
static atomic_t threads_fault; |
static bool sh_quiet; |
|
SPINLOCK_INITIALIZE(rw_lock); |
|
static waitq_t can_start; |
|
static uint32_t seed = 0xdeadbeef; |
|
static uint32_t random(uint32_t max) |
{ |
uint32_t rc; |
|
spinlock_lock(&rw_lock); |
rc = seed % max; |
seed = (((seed<<2) ^ (seed>>2)) * 487) + rc; |
spinlock_unlock(&rw_lock); |
return rc; |
} |
|
static void writer(void *arg) |
{ |
int rc, to; |
thread_detach(THREAD); |
waitq_sleep(&can_start); |
|
to = random(40000); |
|
if (!sh_quiet) |
printf("cpu%d, tid %llu w+ (%d)\n", CPU->id, THREAD->tid, to); |
|
rc = rwlock_write_lock_timeout(&rwlock, to); |
if (SYNCH_FAILED(rc)) { |
if (!sh_quiet) |
printf("cpu%d, tid %llu w!\n", CPU->id, THREAD->tid); |
atomic_dec(&thread_count); |
return; |
} |
|
if (!sh_quiet) |
printf("cpu%d, tid %llu w=\n", CPU->id, THREAD->tid); |
|
if (rwlock.readers_in) { |
if (!sh_quiet) |
printf("Oops."); |
atomic_inc(&threads_fault); |
atomic_dec(&thread_count); |
return; |
} |
thread_usleep(random(1000000)); |
if (rwlock.readers_in) { |
if (!sh_quiet) |
printf("Oops."); |
atomic_inc(&threads_fault); |
atomic_dec(&thread_count); |
return; |
} |
|
rwlock_write_unlock(&rwlock); |
|
if (!sh_quiet) |
printf("cpu%d, tid %llu w-\n", CPU->id, THREAD->tid); |
atomic_dec(&thread_count); |
} |
|
static void reader(void *arg) |
{ |
int rc, to; |
thread_detach(THREAD); |
waitq_sleep(&can_start); |
|
to = random(2000); |
|
if (!sh_quiet) |
printf("cpu%d, tid %llu r+ (%d)\n", CPU->id, THREAD->tid, to); |
|
rc = rwlock_read_lock_timeout(&rwlock, to); |
if (SYNCH_FAILED(rc)) { |
if (!sh_quiet) |
printf("cpu%d, tid %llu r!\n", CPU->id, THREAD->tid); |
atomic_dec(&thread_count); |
return; |
} |
|
if (!sh_quiet) |
printf("cpu%d, tid %llu r=\n", CPU->id, THREAD->tid); |
|
thread_usleep(30000); |
rwlock_read_unlock(&rwlock); |
|
if (!sh_quiet) |
printf("cpu%d, tid %llu r-\n", CPU->id, THREAD->tid); |
atomic_dec(&thread_count); |
} |
|
char * test_rwlock4(bool quiet) |
{ |
context_t ctx; |
uint32_t i; |
sh_quiet = quiet; |
|
waitq_initialize(&can_start); |
rwlock_initialize(&rwlock); |
atomic_set(&threads_fault, 0); |
|
uint32_t rd = random(7) + 1; |
uint32_t wr = random(5) + 1; |
|
atomic_set(&thread_count, rd + wr); |
|
thread_t *thrd; |
|
context_save(&ctx); |
if (!quiet) { |
printf("sp=%#x, readers_in=%d\n", ctx.sp, rwlock.readers_in); |
printf("Creating %d readers\n", rd); |
} |
|
for (i = 0; i < rd; i++) { |
thrd = thread_create(reader, NULL, TASK, 0, "reader", false); |
if (thrd) |
thread_ready(thrd); |
else if (!quiet) |
printf("Could not create reader %d\n", i); |
} |
|
if (!quiet) |
printf("Creating %d writers\n", wr); |
|
for (i = 0; i < wr; i++) { |
thrd = thread_create(writer, NULL, TASK, 0, "writer", false); |
if (thrd) |
thread_ready(thrd); |
else if (!quiet) |
printf("Could not create writer %d\n", i); |
} |
|
thread_usleep(20000); |
waitq_wakeup(&can_start, WAKEUP_ALL); |
|
while (atomic_get(&thread_count) > 0) { |
if (!quiet) |
printf("Threads left: %d\n", atomic_get(&thread_count)); |
thread_sleep(1); |
} |
|
if (atomic_get(&threads_fault) == 0) |
return NULL; |
|
return "Test failed"; |
} |