#include <unistd.h>
#include <stdio.h>
#include <assert.h>
-#include <sched.h>
#include <errno.h>
#include <urcu/arch.h>
#include <urcu/tls-compat.h>
-
-#ifdef __linux__
-#include <syscall.h>
-#endif
+#include "cpuset.h"
+#include "thread-id.h"
/* hardcoded number of CPUs */
#define NR_CPUS 16384
-#if defined(_syscall0)
-_syscall0(pid_t, gettid)
-#elif defined(__NR_gettid)
-static inline pid_t gettid(void)
-{
- return syscall(__NR_gettid);
-}
-#else
-#warning "use pid as tid"
-static inline pid_t gettid(void)
-{
- return getpid();
-}
-#endif
-
#ifndef DYNAMIC_LINK_TEST
#define _LGPL_SOURCE
#else
-#define debug_yield_read()
+#define rcu_debug_yield_read()
#endif
#include <urcu.h>
-struct test_array {
- int a;
-};
-
static volatile int test_go, test_stop;
static unsigned long wdelay;
-static struct test_array *test_rcu_pointer;
+static int *test_rcu_pointer;
static unsigned long duration;
pthread_mutex_t affinity_mutex = PTHREAD_MUTEX_INITIALIZER;
-#ifndef HAVE_CPU_SET_T
-typedef unsigned long cpu_set_t;
-# define CPU_ZERO(cpuset) do { *(cpuset) = 0; } while(0)
-# define CPU_SET(cpu, cpuset) do { *(cpuset) |= (1UL << (cpu)); } while(0)
-#endif
-
static void set_affinity(void)
{
#if HAVE_SCHED_SETAFFINITY
}
}
-/*
- * malloc/free are reusing memory areas too quickly, which does not let us
- * test races appropriately. Use a large circular array for allocations.
- * ARRAY_SIZE is larger than nr_writers, and we keep the mutex across
- * both alloc and free, which insures we never run over our tail.
- */
-#define ARRAY_SIZE (1048576 * nr_writers)
-#define ARRAY_POISON 0xDEADBEEF
-static int array_index;
-static struct test_array *test_array;
-
-static struct test_array *test_array_alloc(void)
-{
- struct test_array *ret;
- int index;
-
- index = array_index % ARRAY_SIZE;
- assert(test_array[index].a == ARRAY_POISON ||
- test_array[index].a == 0);
- ret = &test_array[index];
- array_index++;
- if (array_index == ARRAY_SIZE)
- array_index = 0;
- return ret;
-}
-
-static void test_array_free(struct test_array *ptr)
-{
- if (!ptr)
- return;
- ptr->a = ARRAY_POISON;
-}
-
void *thr_reader(void *_count)
{
unsigned long long *count = _count;
- struct test_array *local_ptr;
+ int *local_ptr;
- printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
- "reader", pthread_self(), (unsigned long)gettid());
+ printf_verbose("thread_begin %s, tid %lu\n",
+ "reader", urcu_get_thread_id());
set_affinity();
rcu_register_thread();
+ assert(!rcu_read_ongoing());
while (!test_go)
{
for (;;) {
rcu_read_lock();
+ assert(rcu_read_ongoing());
local_ptr = rcu_dereference(test_rcu_pointer);
- debug_yield_read();
+ rcu_debug_yield_read();
if (local_ptr)
- assert(local_ptr->a == 8);
+ assert(*local_ptr == 8);
if (caa_unlikely(rduration))
loop_sleep(rduration);
rcu_read_unlock();
rcu_unregister_thread();
*count = URCU_TLS(nr_reads);
- printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
- "reader", pthread_self(), (unsigned long)gettid());
+ printf_verbose("thread_end %s, tid %lu\n",
+ "reader", urcu_get_thread_id());
return ((void*)1);
}
void *thr_writer(void *_count)
{
unsigned long long *count = _count;
- struct test_array *new, *old;
+ int *new, *old;
- printf_verbose("thread_begin %s, thread id : %lx, tid %lu\n",
- "writer", pthread_self(), (unsigned long)gettid());
+ printf_verbose("thread_begin %s, tid %lu\n",
+ "writer", urcu_get_thread_id());
set_affinity();
cmm_smp_mb();
for (;;) {
- rcu_copy_mutex_lock();
- new = test_array_alloc();
- new->a = 8;
+ new = malloc(sizeof(int));
+ assert(new);
+ *new = 8;
old = rcu_xchg_pointer(&test_rcu_pointer, new);
if (caa_unlikely(wduration))
loop_sleep(wduration);
synchronize_rcu();
if (old)
- old->a = 0;
- test_array_free(old);
- rcu_copy_mutex_unlock();
+ *old = 0;
+ free(old);
URCU_TLS(nr_writes)++;
if (caa_unlikely(!test_duration_write()))
break;
loop_sleep(wdelay);
}
- printf_verbose("thread_end %s, thread id : %lx, tid %lu\n",
- "writer", pthread_self(), (unsigned long)gettid());
+ printf_verbose("thread_end %s, tid %lu\n",
+ "writer", urcu_get_thread_id());
*count = URCU_TLS(nr_writes);
return ((void*)2);
}
void show_usage(int argc, char **argv)
{
- printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
+ printf("Usage : %s nr_readers nr_writers duration (s) <OPTIONS>\n",
+ argv[0]);
+ printf("OPTIONS:\n");
#ifdef DEBUG_YIELD
- printf(" [-r] [-w] (yield reader and/or writer)");
+ printf(" [-r] [-w] (yield reader and/or writer)\n");
#endif
- printf(" [-d delay] (writer period (us))");
- printf(" [-c duration] (reader C.S. duration (in loops))");
- printf(" [-e duration] (writer C.S. duration (in loops))");
- printf(" [-v] (verbose output)");
- printf(" [-a cpu#] [-a cpu#]... (affinity)");
+ printf(" [-d delay] (writer period (us))\n");
+ printf(" [-c duration] (reader C.S. duration (in loops))\n");
+ printf(" [-e duration] (writer C.S. duration (in loops))\n");
+ printf(" [-v] (verbose output)\n");
+ printf(" [-a cpu#] [-a cpu#]... (affinity)\n");
printf("\n");
}
switch (argv[i][1]) {
#ifdef DEBUG_YIELD
case 'r':
- yield_active |= YIELD_READ;
+ rcu_yield_active |= RCU_YIELD_READ;
break;
case 'w':
- yield_active |= YIELD_WRITE;
+ rcu_yield_active |= RCU_YIELD_WRITE;
break;
#endif
case 'a':
duration, nr_readers, nr_writers);
printf_verbose("Writer delay : %lu loops.\n", wdelay);
printf_verbose("Reader duration : %lu loops.\n", rduration);
- printf_verbose("thread %-6s, thread id : %lx, tid %lu\n",
- "main", pthread_self(), (unsigned long)gettid());
+ printf_verbose("thread %-6s, tid %lu\n",
+ "main", urcu_get_thread_id());
- test_array = calloc(1, sizeof(*test_array) * ARRAY_SIZE);
tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
count_reader = malloc(sizeof(*count_reader) * nr_readers);
argv[0], duration, nr_readers, rduration, wduration,
nr_writers, wdelay, tot_reads, tot_writes,
tot_reads + tot_writes);
- test_array_free(test_rcu_pointer);
- free(test_array);
+ free(test_rcu_pointer);
free(tid_reader);
free(tid_writer);
free(count_reader);