Allows us to track each process that requests and completes events.
Signed-off-by: Jesse Barnes jbarnes@virtuousgeek.org --- drivers/gpu/drm/drm_irq.c | 8 ++++++ drivers/gpu/drm/drm_trace.h | 57 ++++++++++++++++++++++++++++++++---------- include/drm/drmP.h | 2 + 3 files changed, 53 insertions(+), 14 deletions(-)
diff --git a/drivers/gpu/drm/drm_irq.c b/drivers/gpu/drm/drm_irq.c index 6d201a8..c2ecb3e 100644 --- a/drivers/gpu/drm/drm_irq.c +++ b/drivers/gpu/drm/drm_irq.c @@ -588,6 +588,7 @@ static int drm_queue_vblank_event(struct drm_device *dev, int pipe, return -ENOMEM;
e->pipe = pipe; + e->base.pid = current->pid; e->event.base.type = DRM_EVENT_VBLANK; e->event.base.length = sizeof e->event; e->event.user_data = vblwait->request.signal; @@ -615,6 +616,9 @@ static int drm_queue_vblank_event(struct drm_device *dev, int pipe, DRM_DEBUG("event on vblank count %d, current %d, crtc %d\n", vblwait->request.sequence, seq, pipe);
+ trace_drm_vblank_event_queued(current->pid, pipe, + vblwait->request.sequence); + e->event.sequence = vblwait->request.sequence; if ((seq - vblwait->request.sequence) <= (1 << 23)) { e->event.tv_sec = now.tv_sec; @@ -622,6 +626,8 @@ static int drm_queue_vblank_event(struct drm_device *dev, int pipe, drm_vblank_put(dev, e->pipe); list_add_tail(&e->base.link, &e->base.file_priv->event_list); wake_up_interruptible(&e->base.file_priv->event_wait); + trace_drm_vblank_event_delivered(current->pid, pipe, + vblwait->request.sequence); } else { list_add_tail(&e->base.link, &dev->vblank_event_list); } @@ -752,6 +758,8 @@ void drm_handle_vblank_events(struct drm_device *dev, int crtc) drm_vblank_put(dev, e->pipe); list_move_tail(&e->base.link, &e->base.file_priv->event_list); wake_up_interruptible(&e->base.file_priv->event_wait); + trace_drm_vblank_event_delivered(e->base.pid, e->pipe, + e->event.sequence); }
spin_unlock_irqrestore(&dev->event_lock, flags); diff --git a/drivers/gpu/drm/drm_trace.h b/drivers/gpu/drm/drm_trace.h index 8a92683..03ea964 100644 --- a/drivers/gpu/drm/drm_trace.h +++ b/drivers/gpu/drm/drm_trace.h @@ -11,22 +11,51 @@ #define TRACE_INCLUDE_FILE drm_trace
TRACE_EVENT(drm_vblank_event, + TP_PROTO(int crtc, unsigned int seq), + TP_ARGS(crtc, seq), + TP_STRUCT__entry( + __field(int, crtc) + __field(unsigned int, seq) + ), + TP_fast_assign( + __entry->crtc = crtc; + __entry->seq = seq; + ), + TP_printk("crtc=%d, seq=%d", __entry->crtc, __entry->seq) +);
- TP_PROTO(int crtc, unsigned int seq), - - TP_ARGS(crtc, seq), - - TP_STRUCT__entry( - __field(int, crtc) - __field(unsigned int, seq) - ), - - TP_fast_assign( - __entry->crtc = crtc; - __entry->seq = seq; - ), +TRACE_EVENT(drm_vblank_event_queued, + TP_PROTO(pid_t pid, int crtc, unsigned int seq), + TP_ARGS(pid, crtc, seq), + TP_STRUCT__entry( + __field(pid_t, pid) + __field(int, crtc) + __field(unsigned int, seq) + ), + TP_fast_assign( + __entry->pid = pid; + __entry->crtc = crtc; + __entry->seq = seq; + ), + TP_printk("pid=%d, crtc=%d, seq=%d", __entry->pid, __entry->crtc, \ + __entry->seq) +);
- TP_printk("crtc=%d, seq=%d", __entry->crtc, __entry->seq) +TRACE_EVENT(drm_vblank_event_delivered, + TP_PROTO(pid_t pid, int crtc, unsigned int seq), + TP_ARGS(pid, crtc, seq), + TP_STRUCT__entry( + __field(pid_t, pid) + __field(int, crtc) + __field(unsigned int, seq) + ), + TP_fast_assign( + __entry->pid = pid; + __entry->crtc = crtc; + __entry->seq = seq; + ), + TP_printk("pid=%d, crtc=%d, seq=%d", __entry->pid, __entry->crtc, \ + __entry->seq) );
#endif /* _DRM_TRACE_H_ */ diff --git a/include/drm/drmP.h b/include/drm/drmP.h index c1b9871..8364a70 100644 --- a/include/drm/drmP.h +++ b/include/drm/drmP.h @@ -403,6 +403,8 @@ struct drm_pending_event { struct drm_event *event; struct list_head link; struct drm_file *file_priv; + pid_t pid; /* pid of requester, no guarantee it's valid by the time + we deliver the event, for tracing only */ void (*destroy)(struct drm_pending_event *event); };