linux-kernel - [PATCH RFC 04/16] rcuperf: Add PRCU rcu_perf

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Date:   Tue, 23 Jan 2018 15:59:29 +0800
From:   <lianglihao@...wei.com>
To:     <paulmck@...ux.vnet.ibm.com>
CC:     <guohanjun@...wei.com>, <heng.z@...wei.com>, <hb.chen@...wei.com>,
        <lihao.liang@...il.com>, <linux-kernel@...r.kernel.org>
Subject: [PATCH RFC 04/16] rcuperf: Add PRCU rcu_perf_ops

From: Lihao Liang <lianglihao@...wei.com>

Signed-off-by: Lihao Liang <lianglihao@...wei.com>
---
 kernel/rcu/rcuperf.c | 31 ++++++++++++++++++++++++++++++-
 1 file changed, 30 insertions(+), 1 deletion(-)

diff --git a/kernel/rcu/rcuperf.c b/kernel/rcu/rcuperf.c
index a4a86fb4..ea80fa3e 100644
--- a/kernel/rcu/rcuperf.c
+++ b/kernel/rcu/rcuperf.c
@@ -28,6 +28,7 @@
 #include <linux/spinlock.h>
 #include <linux/smp.h>
 #include <linux/rcupdate.h>
+#include <linux/prcu.h>
 #include <linux/interrupt.h>
 #include <linux/sched.h>
 #include <uapi/linux/sched/types.h>
@@ -304,6 +305,34 @@ static bool __maybe_unused torturing_tasks(void)
 
 #endif /* #else #ifdef CONFIG_TASKS_RCU */
 
+/*
+ * Definitions for prcu perf testing.
+ */
+
+static int prcu_perf_read_lock(void) __acquires(RCU)
+{
+	prcu_read_lock();
+	return 0;
+}
+
+static void prcu_perf_read_unlock(int idx) __releases(RCU)
+{
+	prcu_read_unlock();
+}
+
+static struct rcu_perf_ops prcu_ops = {
+	.ptype		= PRCU_FLAVOR,
+	.init		= rcu_sync_perf_init,
+	.readlock	= prcu_perf_read_lock,
+	.readunlock	= prcu_perf_read_unlock,
+	.started	= rcu_no_completed,
+	.completed	= rcu_no_completed,
+	.exp_completed	= rcu_no_completed,
+	.sync		= synchronize_prcu,
+	.exp_sync	= synchronize_prcu,
+	.name		= "prcu"
+};
+
 /*
  * If performance tests complete, wait for shutdown to commence.
  */
@@ -554,7 +583,7 @@ rcu_perf_init(void)
 	long i;
 	int firsterr = 0;
 	static struct rcu_perf_ops *perf_ops[] = {
-		&rcu_ops, &rcu_bh_ops, &srcu_ops, &sched_ops,
+		&rcu_ops, &rcu_bh_ops, &srcu_ops, &sched_ops, &prcu_ops,
 		RCUPERF_TASKS_OPS
 	};
 
-- 
2.14.1.729.g59c0ea183