sync: add tracepoint support

Change-Id: I181326db4247009161557e45444c9b3548b83d25
Signed-off-by: Erik Gilling <konkers@android.com>

diff --git a/drivers/base/sync.c b/drivers/base/sync.c
index 2f7bd18d2955a89641f0113eb74be79a4ba669b3..98b6e4d2a48bf80a74e434a7f8ebbede38072165 100644 (file)
--- a/drivers/base/sync.c
+++ b/drivers/base/sync.c
@@ -28,6 +28,9 @@
 
 #include <linux/anon_inodes.h>
 
+#define CREATE_TRACE_POINTS
+#include <trace/events/sync.h>
+
 static void sync_fence_signal_pt(struct sync_pt *pt);
 static int _sync_pt_has_signaled(struct sync_pt *pt);
 static void sync_fence_free(struct kref *kref);
@@ -134,6 +137,8 @@ void sync_timeline_signal(struct sync_timeline *obj)
        LIST_HEAD(signaled_pts);
        struct list_head *pos, *n;
 
+       trace_sync_timeline(obj);
+
        spin_lock_irqsave(&obj->active_list_lock, flags);
 
        list_for_each_safe(pos, n, &obj->active_list_head) {
@@ -580,6 +585,11 @@ static bool sync_fence_check(struct sync_fence *fence)
 int sync_fence_wait(struct sync_fence *fence, long timeout)
 {
        int err = 0;
+       struct sync_pt *pt;
+
+       trace_sync_wait(fence, 1);
+       list_for_each_entry(pt, &fence->pt_list_head, pt_list)
+               trace_sync_pt(pt);
 
        if (timeout > 0) {
                timeout = msecs_to_jiffies(timeout);
@@ -590,6 +600,7 @@ int sync_fence_wait(struct sync_fence *fence, long timeout)
                err = wait_event_interruptible(fence->wq,
                                               sync_fence_check(fence));
        }
+       trace_sync_wait(fence, 0);
 
        if (err < 0)
                return err;

diff --git a/include/trace/events/sync.h b/include/trace/events/sync.h
new file mode 100644 (file)
index 0000000..f31bc63
--- /dev/null
+++ b/include/trace/events/sync.h
@@ -0,0 +1,82 @@
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM sync
+
+#if !defined(_TRACE_SYNC_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_SYNC_H
+
+#include <linux/sync.h>
+#include <linux/tracepoint.h>
+
+TRACE_EVENT(sync_timeline,
+           TP_PROTO(struct sync_timeline *timeline),
+
+           TP_ARGS(timeline),
+
+           TP_STRUCT__entry(
+                   __string(name, timeline->name)
+                   __array(char, value, 32)
+                   ),
+
+           TP_fast_assign(
+                   __assign_str(name, timeline->name);
+                   if (timeline->ops->timeline_value_str) {
+                           timeline->ops->timeline_value_str(timeline,
+                                                             __entry->value,
+                                                             sizeof(__entry->value));
+                   } else {
+                           __entry->value[0] = '\0';
+                   }
+                   ),
+
+           TP_printk("name=%s value=%s", __get_str(name), __entry->value)
+);
+
+TRACE_EVENT(sync_wait,
+           TP_PROTO(struct sync_fence *fence, int begin),
+
+           TP_ARGS(fence, begin),
+
+           TP_STRUCT__entry(
+                   __string(name, fence->name)
+                   __field(s32, status)
+                   __field(u32, begin)
+                   ),
+
+           TP_fast_assign(
+                   __assign_str(name, fence->name);
+                   __entry->status = fence->status;
+                   __entry->begin = begin;
+                   ),
+
+           TP_printk("%s name=%s state=%d", __entry->begin ? "begin" : "end",
+                     __get_str(name), __entry->status)
+);
+
+TRACE_EVENT(sync_pt,
+           TP_PROTO(struct sync_pt *pt),
+
+           TP_ARGS(pt),
+
+           TP_STRUCT__entry(
+                   __string(timeline, pt->parent->name)
+                   __array(char, value, 32)
+                   ),
+
+           TP_fast_assign(
+                   __assign_str(timeline, pt->parent->name);
+                   if (pt->parent->ops->pt_value_str) {
+                           pt->parent->ops->pt_value_str(pt,
+                                                       __entry->value,
+                                                       sizeof(__entry->value));
+                   } else {
+                           __entry->value[0] = '\0';
+                   }
+                   ),
+
+           TP_printk("name=%s value=%s", __get_str(timeline), __entry->value)
+       );
+
+#endif /* if !defined(_TRACE_SYNC_H) || defined(TRACE_HEADER_MULTI_READ) */
+
+/* This part must be outside protection */
+#include <trace/define_trace.h>