static char cmdname[512];
static char target[64] = "";
char nid[64] = "";
-static int live_threads = 0;
static int sig_received = 0;
static int o_verbose = 4; /* 0-5 */
static int my_oss = 0;
int k_dev;
};
+static int live_threads = 0;
static struct kid_t *kid_list = NULL;
+pthread_mutex_t m_list = PTHREAD_MUTEX_INITIALIZER;
static struct kid_t *push_kid(int tnum)
{
return NULL;
}
kid->k_pthread = pthread_self();
+ pthread_mutex_lock(&m_list);
kid->k_next = kid_list;
kid->k_id = tnum;
kid_list = kid;
live_threads++;
+ pthread_mutex_unlock(&m_list);
return kid;
}
while(!(rc || sig_received)) {
pthread_mutex_lock(&m_trigger);
+ pthread_mutex_lock(&m_list);
waiting_count++;
if ((waiting_count == live_threads) && timer_on) {
report_perf();
timer_on = 0;
all_done = 1;
}
+ pthread_mutex_unlock(&m_list);
pthread_cond_wait(&cv_trigger, &m_trigger);
waiting_count--;
all_done = 0;
pthread_exit((void *)(long)rc);
}
+/*
+ * PTHREAD_STACK_MIN is 16K minimal stack for threads. This
+ * is stack consumed by one thread, which executes NULL procedure.
+ * We need some more here and 20k stack for one client thread
+ * is enough to not overflow. In same time it does not consume
+ * a lot of memory for large number of threads.
+ *
+ * 20K virtual clients will only consume 320M + 400M. Still to
+ * create this number of virtual clients we need to fix 8192
+ * OBDs limit.
+ */
+#define CLIENT_THREAD_STACK_SIZE (PTHREAD_STACK_MIN + (20 * 1024))
+
static int loadgen_start_clients(int argc, char **argv)
{
int rc = 0, i, numt;
cmdname, rc, strerror(errno));
return -errno;
}
- pthread_attr_setstacksize (&attr, PTHREAD_STACK_MIN);
+ pthread_attr_setstacksize (&attr, CLIENT_THREAD_STACK_SIZE);
pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE);
numt += live_threads;
if (argc < 3 || argc > 4)
return CMD_HELP;
threads = atoi(argv[1]);
+ pthread_mutex_lock(&m_list);
if (threads > live_threads) {
+ pthread_mutex_unlock(&m_list);
fprintf(stderr, "requested %d threads but only %d are running. "
"Use 'start' to start some more.\n",
threads, live_threads);
return -EOVERFLOW;
+ } else {
+ pthread_mutex_unlock(&m_list);
}
trigger(C_WRITE, threads, atoi(argv[2]),
(argc == 4) ? atoi(argv[3]) : 0);