/*
* test_urcu_lfs.c
*
- * Userspace RCU library - example RCU-based lock-free stack
+ * Userspace RCU library - example lock-free stack
*
- * Copyright February 2010 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * Copyright 2010-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
* Copyright February 2010 - Paolo Bonzini <pbonzini@redhat.com>
*
* This program is free software; you can redistribute it and/or modify
#include <unistd.h>
#include <stdio.h>
#include <assert.h>
-#include <sys/syscall.h>
#include <sched.h>
#include <errno.h>
#include <urcu/arch.h>
+#include <urcu/tls-compat.h>
+
+#ifdef __linux__
+#include <syscall.h>
+#endif
/* hardcoded number of CPUs */
#define NR_CPUS 16384
#define _LGPL_SOURCE
#endif
#include <urcu.h>
-#include <urcu/rculfstack.h>
-#include <urcu-defer.h>
+#include <urcu/cds.h>
static volatile int test_go, test_stop;
/* read-side C.S. duration, in loops */
static unsigned long wdelay;
-static inline void loop_sleep(unsigned long l)
+static inline void loop_sleep(unsigned long loops)
{
- while(l-- != 0)
+ while (loops-- != 0)
caa_cpu_relax();
}
static void set_affinity(void)
{
+#if HAVE_SCHED_SETAFFINITY
cpu_set_t mask;
- int cpu;
- int ret;
+ int cpu, ret;
+#endif /* HAVE_SCHED_SETAFFINITY */
if (!use_affinity)
return;
return !test_stop;
}
-static unsigned long long __thread nr_dequeues;
-static unsigned long long __thread nr_enqueues;
+static DEFINE_URCU_TLS(unsigned long long, nr_dequeues);
+static DEFINE_URCU_TLS(unsigned long long, nr_enqueues);
-static unsigned long long __thread nr_successful_dequeues;
-static unsigned long long __thread nr_successful_enqueues;
+static DEFINE_URCU_TLS(unsigned long long, nr_successful_dequeues);
+static DEFINE_URCU_TLS(unsigned long long, nr_successful_enqueues);
static unsigned int nr_enqueuers;
static unsigned int nr_dequeuers;
-static struct cds_lfs_stack_rcu s;
+struct test {
+ struct cds_lfs_node list;
+ struct rcu_head rcu;
+};
+
+static struct cds_lfs_stack s;
void *thr_enqueuer(void *_count)
{
cmm_smp_mb();
for (;;) {
- struct cds_lfs_node_rcu *node = malloc(sizeof(*node));
+ struct test *node = malloc(sizeof(*node));
if (!node)
goto fail;
- cds_lfs_node_init_rcu(node);
- cds_lfs_push_rcu(&s, node);
- nr_successful_enqueues++;
+ cds_lfs_node_init(&node->list);
+ cds_lfs_push(&s, &node->list);
+ URCU_TLS(nr_successful_enqueues)++;
- if (unlikely(wdelay))
+ if (caa_unlikely(wdelay))
loop_sleep(wdelay);
fail:
- nr_enqueues++;
- if (unlikely(!test_duration_enqueue()))
+ URCU_TLS(nr_enqueues)++;
+ if (caa_unlikely(!test_duration_enqueue()))
break;
}
rcu_unregister_thread();
- count[0] = nr_enqueues;
- count[1] = nr_successful_enqueues;
+ count[0] = URCU_TLS(nr_enqueues);
+ count[1] = URCU_TLS(nr_successful_enqueues);
printf_verbose("enqueuer thread_end, thread id : %lx, tid %lu, "
"enqueues %llu successful_enqueues %llu\n",
- pthread_self(), (unsigned long)gettid(), nr_enqueues,
- nr_successful_enqueues);
+ pthread_self(), (unsigned long)gettid(),
+ URCU_TLS(nr_enqueues), URCU_TLS(nr_successful_enqueues));
return ((void*)1);
}
+static
+void free_node_cb(struct rcu_head *head)
+{
+ struct test *node =
+ caa_container_of(head, struct test, rcu);
+ free(node);
+}
+
void *thr_dequeuer(void *_count)
{
unsigned long long *count = _count;
set_affinity();
- rcu_defer_register_thread();
rcu_register_thread();
while (!test_go)
cmm_smp_mb();
for (;;) {
- struct cds_lfs_node_rcu *node = cds_lfs_pop_rcu(&s);
+ struct cds_lfs_node *snode;
- if (node) {
- defer_rcu(free, node);
- nr_successful_dequeues++;
- }
+ rcu_read_lock();
+ snode = __cds_lfs_pop(&s);
+ rcu_read_unlock();
+ if (snode) {
+ struct test *node;
- nr_dequeues++;
- if (unlikely(!test_duration_dequeue()))
+ node = caa_container_of(snode, struct test, list);
+ call_rcu(&node->rcu, free_node_cb);
+ URCU_TLS(nr_successful_dequeues)++;
+ }
+ URCU_TLS(nr_dequeues)++;
+ if (caa_unlikely(!test_duration_dequeue()))
break;
- if (unlikely(rduration))
+ if (caa_unlikely(rduration))
loop_sleep(rduration);
}
rcu_unregister_thread();
- rcu_defer_unregister_thread();
printf_verbose("dequeuer thread_end, thread id : %lx, tid %lu, "
"dequeues %llu, successful_dequeues %llu\n",
- pthread_self(), (unsigned long)gettid(), nr_dequeues,
- nr_successful_dequeues);
- count[0] = nr_dequeues;
- count[1] = nr_successful_dequeues;
+ pthread_self(), (unsigned long)gettid(),
+ URCU_TLS(nr_dequeues), URCU_TLS(nr_successful_dequeues));
+ count[0] = URCU_TLS(nr_dequeues);
+ count[1] = URCU_TLS(nr_successful_dequeues);
return ((void*)2);
}
-void test_end(struct cds_lfs_stack_rcu *s, unsigned long long *nr_dequeues)
+void test_end(struct cds_lfs_stack *s, unsigned long long *nr_dequeues)
{
- struct cds_lfs_node_rcu *node;
+ struct cds_lfs_node *snode;
do {
- node = cds_lfs_pop_rcu(s);
- if (node) {
+ snode = __cds_lfs_pop(s);
+ if (snode) {
+ struct test *node;
+
+ node = caa_container_of(snode, struct test, list);
free(node);
(*nr_dequeues)++;
}
- } while (node);
+ } while (snode);
}
void show_usage(int argc, char **argv)
tid_dequeuer = malloc(sizeof(*tid_dequeuer) * nr_dequeuers);
count_enqueuer = malloc(2 * sizeof(*count_enqueuer) * nr_enqueuers);
count_dequeuer = malloc(2 * sizeof(*count_dequeuer) * nr_dequeuers);
- cds_lfs_init_rcu(&s);
+ cds_lfs_init(&s);
+ err = create_all_cpu_call_rcu_data(0);
+ if (err) {
+ printf("Per-CPU call_rcu() worker threads unavailable. Using default global worker thread.\n");
+ }
next_aff = 0;
tot_successful_enqueues,
tot_successful_dequeues + end_dequeues);
+ free_all_cpu_call_rcu_data();
free(count_enqueuer);
free(count_dequeuer);
free(tid_enqueuer);
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