refperf: Add test for RCU Tasks Trace readers.

This commit adds testing for RCU Tasks Trace readers to the refperf module.

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>

diff --git a/kernel/rcu/refperf.c b/kernel/rcu/refperf.c
index 49fffb9bce77c08b58b6c95c9a0ce8d0d02dd37f..da7de9ac548d2e587efe0061c80066562a3d49d2 100644 (file)
--- a/kernel/rcu/refperf.c
+++ b/kernel/rcu/refperf.c
@@ -25,6 +25,7 @@
 #include <linux/notifier.h>
 #include <linux/percpu.h>
 #include <linux/rcupdate.h>
+#include <linux/rcupdate_trace.h>
 #include <linux/reboot.h>
 #include <linux/sched.h>
 #include <linux/spinlock.h>
@@ -157,7 +158,6 @@ static struct ref_perf_ops rcu_ops = {
        .name           = "rcu"
 };
 
-
 // Definitions for SRCU ref perf testing.
 DEFINE_STATIC_SRCU(srcu_refctl_perf);
 static struct srcu_struct *srcu_ctlp = &srcu_refctl_perf;
@@ -192,6 +192,35 @@ static struct ref_perf_ops srcu_ops = {
        .name           = "srcu"
 };
 
+// Definitions for RCU Tasks Trace ref perf testing.
+static void rcu_trace_ref_perf_read_section(const int nloops)
+{
+       int i;
+
+       for (i = nloops; i >= 0; i--) {
+               rcu_read_lock_trace();
+               rcu_read_unlock_trace();
+       }
+}
+
+static void rcu_trace_ref_perf_delay_section(const int nloops, const int udl, const int ndl)
+{
+       int i;
+
+       for (i = nloops; i >= 0; i--) {
+               rcu_read_lock_trace();
+               un_delay(udl, ndl);
+               rcu_read_unlock_trace();
+       }
+}
+
+static struct ref_perf_ops rcu_trace_ops = {
+       .init           = rcu_sync_perf_init,
+       .readsection    = rcu_trace_ref_perf_read_section,
+       .delaysection   = rcu_trace_ref_perf_delay_section,
+       .name           = "rcu-trace"
+};
+
 // Definitions for reference count
 static atomic_t refcnt;
 
@@ -584,7 +613,7 @@ ref_perf_init(void)
        long i;
        int firsterr = 0;
        static struct ref_perf_ops *perf_ops[] = {
-               &rcu_ops, &srcu_ops, &refcnt_ops, &rwlock_ops, &rwsem_ops,
+               &rcu_ops, &srcu_ops, &rcu_trace_ops, &refcnt_ops, &rwlock_ops, &rwsem_ops,
        };
 
        if (!torture_init_begin(perf_type, verbose))