[PATCH tip/core/rcu 25/30] refperf: Add test for RCU Tasks Trace readers.

paulmck
2020-06-23T00:31:00Z

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

Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
---
kernel/rcu/refperf.c | 33 +++++++++++++++++++++++++++++++--
1 file changed, 31 insertions(+), 2 deletions(-)

diff --git a/kernel/rcu/refperf.c b/kernel/rcu/refperf.c
index 49fffb9..da7de9a 100644
--- 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))
--
2.9.5