[media] v4l2-dev: Add tracepoints for QBUF and DQBUF
Add tracepoints to the QBUF and DQBUF ioctls to enable rudimentary performance measurements using standard kernel tracers. [m.chehab@samsung.com: CodingStyle fixes (whitespacing)] Signed-off-by: Wade Farnsworth <wade_farnsworth@mentor.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>
This commit is contained in:
Wade Farnsworth
Mauro Carvalho Chehab
parent
324ed533bf
commit
2d01237389
2 changed files with 166 additions and 0 deletions
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@ -31,6 +31,10 @@
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#include <media/v4l2-device.h>
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#include <media/v4l2-ioctl.h>
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#define CREATE_TRACE_POINTS
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#include <trace/events/v4l2.h>
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#define VIDEO_NUM_DEVICES 256
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#define VIDEO_NAME "video4linux"
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@ -391,6 +395,11 @@ static long v4l2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
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} else
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ret = -ENOTTY;
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if (cmd == VIDIOC_DQBUF)
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trace_v4l2_dqbuf(vdev->minor, (struct v4l2_buffer *)arg);
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else if (cmd == VIDIOC_QBUF)
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trace_v4l2_qbuf(vdev->minor, (struct v4l2_buffer *)arg);
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return ret;
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}
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157
include/trace/events/v4l2.h
Normal file
157
include/trace/events/v4l2.h
Normal file
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@ -0,0 +1,157 @@
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#undef TRACE_SYSTEM
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#define TRACE_SYSTEM v4l2
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#if !defined(_TRACE_V4L2_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_V4L2_H
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#include <linux/tracepoint.h>
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#define show_type(type) \
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__print_symbolic(type, \
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{ V4L2_BUF_TYPE_VIDEO_CAPTURE, "VIDEO_CAPTURE" }, \
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{ V4L2_BUF_TYPE_VIDEO_OUTPUT, "VIDEO_OUTPUT" }, \
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{ V4L2_BUF_TYPE_VIDEO_OVERLAY, "VIDEO_OVERLAY" }, \
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{ V4L2_BUF_TYPE_VBI_CAPTURE, "VBI_CAPTURE" }, \
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{ V4L2_BUF_TYPE_VBI_OUTPUT, "VBI_OUTPUT" }, \
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{ V4L2_BUF_TYPE_SLICED_VBI_CAPTURE, "SLICED_VBI_CAPTURE" }, \
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{ V4L2_BUF_TYPE_SLICED_VBI_OUTPUT, "SLICED_VBI_OUTPUT" }, \
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{ V4L2_BUF_TYPE_VIDEO_OUTPUT_OVERLAY, "VIDEO_OUTPUT_OVERLAY" },\
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{ V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE, "VIDEO_CAPTURE_MPLANE" },\
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{ V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE, "VIDEO_OUTPUT_MPLANE" }, \
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{ V4L2_BUF_TYPE_PRIVATE, "PRIVATE" })
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#define show_field(field) \
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__print_symbolic(field, \
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{ V4L2_FIELD_ANY, "ANY" }, \
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{ V4L2_FIELD_NONE, "NONE" }, \
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{ V4L2_FIELD_TOP, "TOP" }, \
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{ V4L2_FIELD_BOTTOM, "BOTTOM" }, \
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{ V4L2_FIELD_INTERLACED, "INTERLACED" }, \
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{ V4L2_FIELD_SEQ_TB, "SEQ_TB" }, \
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{ V4L2_FIELD_SEQ_BT, "SEQ_BT" }, \
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{ V4L2_FIELD_ALTERNATE, "ALTERNATE" }, \
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{ V4L2_FIELD_INTERLACED_TB, "INTERLACED_TB" }, \
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{ V4L2_FIELD_INTERLACED_BT, "INTERLACED_BT" })
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#define show_timecode_type(type) \
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__print_symbolic(type, \
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{ V4L2_TC_TYPE_24FPS, "24FPS" }, \
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{ V4L2_TC_TYPE_25FPS, "25FPS" }, \
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{ V4L2_TC_TYPE_30FPS, "30FPS" }, \
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{ V4L2_TC_TYPE_50FPS, "50FPS" }, \
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{ V4L2_TC_TYPE_60FPS, "60FPS" })
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#define show_flags(flags) \
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__print_flags(flags, "|", \
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{ V4L2_BUF_FLAG_MAPPED, "MAPPED" }, \
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{ V4L2_BUF_FLAG_QUEUED, "QUEUED" }, \
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{ V4L2_BUF_FLAG_DONE, "DONE" }, \
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{ V4L2_BUF_FLAG_KEYFRAME, "KEYFRAME" }, \
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{ V4L2_BUF_FLAG_PFRAME, "PFRAME" }, \
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{ V4L2_BUF_FLAG_BFRAME, "BFRAME" }, \
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{ V4L2_BUF_FLAG_ERROR, "ERROR" }, \
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{ V4L2_BUF_FLAG_TIMECODE, "TIMECODE" }, \
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{ V4L2_BUF_FLAG_PREPARED, "PREPARED" }, \
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{ V4L2_BUF_FLAG_NO_CACHE_INVALIDATE, "NO_CACHE_INVALIDATE" }, \
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{ V4L2_BUF_FLAG_NO_CACHE_CLEAN, "NO_CACHE_CLEAN" }, \
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{ V4L2_BUF_FLAG_TIMESTAMP_MASK, "TIMESTAMP_MASK" }, \
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{ V4L2_BUF_FLAG_TIMESTAMP_UNKNOWN, "TIMESTAMP_UNKNOWN" }, \
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{ V4L2_BUF_FLAG_TIMESTAMP_MONOTONIC, "TIMESTAMP_MONOTONIC" }, \
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{ V4L2_BUF_FLAG_TIMESTAMP_COPY, "TIMESTAMP_COPY" })
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#define show_timecode_flags(flags) \
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__print_flags(flags, "|", \
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{ V4L2_TC_FLAG_DROPFRAME, "DROPFRAME" }, \
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{ V4L2_TC_FLAG_COLORFRAME, "COLORFRAME" }, \
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{ V4L2_TC_USERBITS_USERDEFINED, "USERBITS_USERDEFINED" }, \
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{ V4L2_TC_USERBITS_8BITCHARS, "USERBITS_8BITCHARS" })
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#define V4L2_TRACE_EVENT(event_name) \
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TRACE_EVENT(event_name, \
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TP_PROTO(int minor, struct v4l2_buffer *buf), \
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\
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TP_ARGS(minor, buf), \
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\
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TP_STRUCT__entry( \
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__field(int, minor) \
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__field(u32, index) \
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__field(u32, type) \
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__field(u32, bytesused) \
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__field(u32, flags) \
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__field(u32, field) \
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__field(s64, timestamp) \
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__field(u32, timecode_type) \
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__field(u32, timecode_flags) \
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__field(u8, timecode_frames) \
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__field(u8, timecode_seconds) \
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__field(u8, timecode_minutes) \
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__field(u8, timecode_hours) \
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__field(u8, timecode_userbits0) \
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__field(u8, timecode_userbits1) \
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__field(u8, timecode_userbits2) \
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__field(u8, timecode_userbits3) \
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__field(u32, sequence) \
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), \
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\
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TP_fast_assign( \
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__entry->minor = minor; \
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__entry->index = buf->index; \
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__entry->type = buf->type; \
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__entry->bytesused = buf->bytesused; \
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__entry->flags = buf->flags; \
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__entry->field = buf->field; \
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__entry->timestamp = \
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timeval_to_ns(&buf->timestamp); \
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__entry->timecode_type = buf->timecode.type; \
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__entry->timecode_flags = buf->timecode.flags; \
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__entry->timecode_frames = \
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buf->timecode.frames; \
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__entry->timecode_seconds = \
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buf->timecode.seconds; \
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__entry->timecode_minutes = \
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buf->timecode.minutes; \
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__entry->timecode_hours = buf->timecode.hours; \
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__entry->timecode_userbits0 = \
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buf->timecode.userbits[0]; \
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__entry->timecode_userbits1 = \
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buf->timecode.userbits[1]; \
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__entry->timecode_userbits2 = \
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buf->timecode.userbits[2]; \
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__entry->timecode_userbits3 = \
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buf->timecode.userbits[3]; \
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__entry->sequence = buf->sequence; \
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), \
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\
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TP_printk("minor = %d, index = %u, type = %s, " \
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"bytesused = %u, flags = %s, " \
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"field = %s, timestamp = %llu, timecode = { " \
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"type = %s, flags = %s, frames = %u, " \
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"seconds = %u, minutes = %u, hours = %u, " \
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"userbits = { %u %u %u %u } }, " \
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"sequence = %u", __entry->minor, \
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__entry->index, show_type(__entry->type), \
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__entry->bytesused, \
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show_flags(__entry->flags), \
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show_field(__entry->field), \
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__entry->timestamp, \
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show_timecode_type(__entry->timecode_type), \
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show_timecode_flags(__entry->timecode_flags), \
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__entry->timecode_frames, \
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__entry->timecode_seconds, \
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__entry->timecode_minutes, \
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__entry->timecode_hours, \
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__entry->timecode_userbits0, \
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__entry->timecode_userbits1, \
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__entry->timecode_userbits2, \
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__entry->timecode_userbits3, \
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__entry->sequence \
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) \
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)
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V4L2_TRACE_EVENT(v4l2_dqbuf);
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V4L2_TRACE_EVENT(v4l2_qbuf);
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#endif /* if !defined(_TRACE_V4L2_H) || defined(TRACE_HEADER_MULTI_READ) */
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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