Add rwlock scalability test
authorMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Tue, 9 Jun 2009 16:50:37 +0000 (12:50 -0400)
committerMathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Tue, 9 Jun 2009 16:50:37 +0000 (12:50 -0400)
Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Makefile
test_rwlock.c [new file with mode: 0644]

index b25b241263e8cf10aaadf99f3afb7e565ead055a..25735dc8aa15e1e6ab23a0a7cb11fee77e318738 100644 (file)
--- a/Makefile
+++ b/Makefile
@@ -12,7 +12,8 @@ LDFLAGS=-lpthread
 SRC_DEP=`echo $^ | sed 's/[^ ]*\.h//g'`
 
 all: arch-api test_urcu test_urcu_dynamic_link test_urcu_timing \
-       test_rwlock_timing test_perthreadlock_timing test_urcu_yield \
+       test_rwlock_timing test_rwlock test_perthreadlock_timing \
+       test_urcu_yield \
        urcu-asm.S test_qsbr_timing test_qsbr urcu-asm.o urcutorture \
        urcutorture-yield liburcu.so
 
@@ -37,6 +38,9 @@ test_urcu: urcu.o test_urcu.c urcu.h
 test_qsbr: urcu-qsbr.o test_qsbr.c urcu-qsbr.h
        $(CC) ${CFLAGS} $(LDFLAGS) -o $@ $(SRC_DEP)
 
+test_rwlock: urcu.o test_rwlock.c urcu.h
+       $(CC) ${CFLAGS} $(LDFLAGS) -o $@ $(SRC_DEP)
+
 test_urcu_dynamic_link: urcu.o test_urcu.c urcu.h
        $(CC) ${CFLAGS} -DDYNAMIC_LINK_TEST $(LDFLAGS) -o $@ $(SRC_DEP)
 
diff --git a/test_rwlock.c b/test_rwlock.c
new file mode 100644 (file)
index 0000000..9a818ff
--- /dev/null
@@ -0,0 +1,292 @@
+/*
+ * test_urcu.c
+ *
+ * Userspace RCU library - test program
+ *
+ * Copyright February 2009 - Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+#include <stdio.h>
+#include <pthread.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/types.h>
+#include <sys/wait.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <assert.h>
+#include <sys/syscall.h>
+
+#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()
+#endif
+#include "urcu.h"
+
+struct test_array {
+       int a;
+};
+
+pthread_rwlock_t lock = PTHREAD_RWLOCK_INITIALIZER;
+
+static volatile int test_go;
+
+static int wdelay;
+
+static struct test_array test_array = { 8 };
+
+static unsigned long duration;
+static time_t start_time;
+static unsigned long __thread duration_interval;
+#define DURATION_TEST_DELAY_WRITE 4
+#define DURATION_TEST_DELAY_READ 100
+
+/*
+ * returns 0 if test should end.
+ */
+static int test_duration_write(void)
+{
+       if (duration_interval++ >= DURATION_TEST_DELAY_WRITE) {
+               duration_interval = 0;
+               if (time(NULL) - start_time >= duration)
+                       return 0;
+       }
+       return 1;
+}
+
+static int test_duration_read(void)
+{
+       if (duration_interval++ >= DURATION_TEST_DELAY_READ) {
+               duration_interval = 0;
+               if (time(NULL) - start_time >= duration)
+                       return 0;
+       }
+       return 1;
+}
+
+static unsigned long long __thread nr_writes;
+static unsigned long long __thread nr_reads;
+
+static unsigned int nr_readers;
+static unsigned int nr_writers;
+
+pthread_mutex_t rcu_copy_mutex = PTHREAD_MUTEX_INITIALIZER;
+
+void rcu_copy_mutex_lock(void)
+{
+       int ret;
+       ret = pthread_mutex_lock(&rcu_copy_mutex);
+       if (ret) {
+               perror("Error in pthread mutex lock");
+               exit(-1);
+       }
+}
+
+void rcu_copy_mutex_unlock(void)
+{
+       int ret;
+
+       ret = pthread_mutex_unlock(&rcu_copy_mutex);
+       if (ret) {
+               perror("Error in pthread mutex unlock");
+               exit(-1);
+       }
+}
+
+void *thr_reader(void *_count)
+{
+       unsigned long long *count = _count;
+
+       printf("thread_begin %s, thread id : %lx, tid %lu\n",
+                       "reader", pthread_self(), (unsigned long)gettid());
+
+       while (!test_go)
+       {
+       }
+
+       for (;;) {
+               pthread_rwlock_rdlock(&lock);
+               assert(test_array.a == 8);
+               pthread_rwlock_unlock(&lock);
+               nr_reads++;
+               if (!test_duration_read())
+                       break;
+       }
+
+       *count = nr_reads;
+       printf("thread_end %s, thread id : %lx, tid %lu\n",
+                       "reader", pthread_self(), (unsigned long)gettid());
+       return ((void*)1);
+
+}
+
+void *thr_writer(void *_count)
+{
+       unsigned long long *count = _count;
+
+       printf("thread_begin %s, thread id : %lx, tid %lu\n",
+                       "writer", pthread_self(), (unsigned long)gettid());
+
+       while (!test_go)
+       {
+       }
+
+       for (;;) {
+               pthread_rwlock_wrlock(&lock);
+               test_array.a = 8;
+               pthread_rwlock_unlock(&lock);
+               nr_writes++;
+               if (!test_duration_write())
+                       break;
+               if (wdelay)
+                       usleep(wdelay);
+       }
+
+       printf("thread_end %s, thread id : %lx, tid %lu\n",
+                       "writer", pthread_self(), (unsigned long)gettid());
+       *count = nr_writes;
+       return ((void*)2);
+}
+
+void show_usage(int argc, char **argv)
+{
+       printf("Usage : %s nr_readers nr_writers duration (s)", argv[0]);
+#ifdef DEBUG_YIELD
+       printf(" [-r] [-w] (yield reader and/or writer)");
+#endif
+       printf(" [-d delay] (writer period)");
+       printf("\n");
+}
+
+int main(int argc, char **argv)
+{
+       int err;
+       pthread_t *tid_reader, *tid_writer;
+       void *tret;
+       unsigned long long *count_reader, *count_writer;
+       unsigned long long tot_reads = 0, tot_writes = 0;
+       int i;
+
+       if (argc < 4) {
+               show_usage(argc, argv);
+               return -1;
+       }
+
+       err = sscanf(argv[1], "%u", &nr_readers);
+       if (err != 1) {
+               show_usage(argc, argv);
+               return -1;
+       }
+
+       err = sscanf(argv[2], "%u", &nr_writers);
+       if (err != 1) {
+               show_usage(argc, argv);
+               return -1;
+       }
+       
+       err = sscanf(argv[3], "%lu", &duration);
+       if (err != 1) {
+               show_usage(argc, argv);
+               return -1;
+       }
+
+       for (i = 4; i < argc; i++) {
+               if (argv[i][0] != '-')
+                       continue;
+               switch (argv[i][1]) {
+#ifdef DEBUG_YIELD
+               case 'r':
+                       yield_active |= YIELD_READ;
+                       break;
+               case 'w':
+                       yield_active |= YIELD_WRITE;
+                       break;
+#endif
+               case 'd':
+                       if (argc < i + 2) {
+                               show_usage(argc, argv);
+                               return -1;
+                       }
+                       wdelay = atoi(argv[++i]);
+                       break;
+               }
+       }
+
+       printf("running test for %lu seconds, %u readers, %u writers.\n",
+               duration, nr_readers, nr_writers);
+       printf("Writer delay : %u us.\n", wdelay);
+       start_time = time(NULL);
+       printf("thread %-6s, thread id : %lx, tid %lu\n",
+                       "main", pthread_self(), (unsigned long)gettid());
+
+       tid_reader = malloc(sizeof(*tid_reader) * nr_readers);
+       tid_writer = malloc(sizeof(*tid_writer) * nr_writers);
+       count_reader = malloc(sizeof(*count_reader) * nr_readers);
+       count_writer = malloc(sizeof(*count_writer) * nr_writers);
+
+       for (i = 0; i < nr_readers; i++) {
+               err = pthread_create(&tid_reader[i], NULL, thr_reader,
+                                    &count_reader[i]);
+               if (err != 0)
+                       exit(1);
+       }
+       for (i = 0; i < nr_writers; i++) {
+               err = pthread_create(&tid_writer[i], NULL, thr_writer,
+                                    &count_writer[i]);
+               if (err != 0)
+                       exit(1);
+       }
+
+       test_go = 1;
+
+       for (i = 0; i < nr_readers; i++) {
+               err = pthread_join(tid_reader[i], &tret);
+               if (err != 0)
+                       exit(1);
+               tot_reads += count_reader[i];
+       }
+       for (i = 0; i < nr_writers; i++) {
+               err = pthread_join(tid_writer[i], &tret);
+               if (err != 0)
+                       exit(1);
+               tot_writes += count_writer[i];
+       }
+       
+       printf("total number of reads : %llu, writes %llu\n", tot_reads,
+              tot_writes);
+       free(tid_reader);
+       free(tid_writer);
+       free(count_reader);
+       free(count_writer);
+       return 0;
+}
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