Initial commit: OpenHarmony-v4.0-ReleaseOpenHarmony-v4.0-Release

1 files changed, 127 insertions, 0 deletions

diff --git a/arch/mips/kernel/spinlock_test.c b/arch/mips/kernel/spinlock_test.c
new file mode 100644
index 000000000..ab4e3e1b1
--- /dev/null
+++ b/arch/mips/kernel/spinlock_test.c
@@ -0,0 +1,127 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/init.h>
+#include <linux/kthread.h>
+#include <linux/hrtimer.h>
+#include <linux/fs.h>
+#include <linux/debugfs.h>
+#include <linux/export.h>
+#include <linux/spinlock.h>
+#include <asm/debug.h>
+
+static int ss_get(void *data, u64 *val)
+{
+        ktime_t start, finish;
+        int loops;
+        int cont;
+        DEFINE_RAW_SPINLOCK(ss_spin);
+
+        loops = 1000000;
+        cont = 1;
+
+        start = ktime_get();
+
+        while (cont) {
+                raw_spin_lock(&ss_spin);
+                loops--;
+                if (loops == 0)
+                        cont = 0;
+                raw_spin_unlock(&ss_spin);
+        }
+
+        finish = ktime_get();
+
+        *val = ktime_us_delta(finish, start);
+
+        return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(fops_ss, ss_get, NULL, "%llu\n");
+
+
+
+struct spin_multi_state {
+        raw_spinlock_t lock;
+        atomic_t start_wait;
+        atomic_t enter_wait;
+        atomic_t exit_wait;
+        int loops;
+};
+
+struct spin_multi_per_thread {
+        struct spin_multi_state *state;
+        ktime_t start;
+};
+
+static int multi_other(void *data)
+{
+        int loops;
+        int cont;
+        struct spin_multi_per_thread *pt = data;
+        struct spin_multi_state *s = pt->state;
+
+        loops = s->loops;
+        cont = 1;
+
+        atomic_dec(&s->enter_wait);
+
+        while (atomic_read(&s->enter_wait))
+                ; /* spin */
+
+        pt->start = ktime_get();
+
+        atomic_dec(&s->start_wait);
+
+        while (atomic_read(&s->start_wait))
+                ; /* spin */
+
+        while (cont) {
+                raw_spin_lock(&s->lock);
+                loops--;
+                if (loops == 0)
+                        cont = 0;
+                raw_spin_unlock(&s->lock);
+        }
+
+        atomic_dec(&s->exit_wait);
+        while (atomic_read(&s->exit_wait))
+                ; /* spin */
+        return 0;
+}
+
+static int multi_get(void *data, u64 *val)
+{
+        ktime_t finish;
+        struct spin_multi_state ms;
+        struct spin_multi_per_thread t1, t2;
+
+        ms.lock = __RAW_SPIN_LOCK_UNLOCKED("multi_get");
+        ms.loops = 1000000;
+
+        atomic_set(&ms.start_wait, 2);
+        atomic_set(&ms.enter_wait, 2);
+        atomic_set(&ms.exit_wait, 2);
+        t1.state = &ms;
+        t2.state = &ms;
+
+        kthread_run(multi_other, &t2, "multi_get");
+
+        multi_other(&t1);
+
+        finish = ktime_get();
+
+        *val = ktime_us_delta(finish, t1.start);
+
+        return 0;
+}
+
+DEFINE_SIMPLE_ATTRIBUTE(fops_multi, multi_get, NULL, "%llu\n");
+
+static int __init spinlock_test(void)
+{
+        debugfs_create_file("spin_single", S_IRUGO, mips_debugfs_dir, NULL,
+                            &fops_ss);
+        debugfs_create_file("spin_multi", S_IRUGO, mips_debugfs_dir, NULL,
+                            &fops_multi);
+        return 0;
+}
+device_initcall(spinlock_test);