Hi,
thanks for answers.
thanks for answers.
2013/7/2 Yonit Halperin <yhalperi@xxxxxxxxxx>
Hi,What vm are you using? We encountered such behaviour with gnome-shell, due to high frequency updates of regions over the primary surface.
On 07/01/2013 04:27 AM, Matilde Yanez wrote:
Hello,
I need some information about video detection, on VM.
When I am on web pages, or documents, with images the VM seems to detect
video and start the mjpeg_encoder process.
Thus, the display is slows down.
On CentOs and Windows VMs, indeed with high frequency updates of regions it considers that is video. Such as large Excel documents or web page with many images. Adding log I can see that spice server starts stream, and does the same treatment as video.
This is unexpected. On which guest scenarios?With argument streaming-video=off, the CPU consomation goes up.
When I play a movie, with default "streaming-video" arguments, on windows VM, I am around 60% of CPU consomation of VM's qemu process ("top" command), and with "streaming-video=off" I am around 120%.
Due to all images that are send to refresh client display?
I'm afraid there is no simple answer for thisIncreasing the value of "RED_STREAM_FRAMES_START_CONDITION", does not
launch the video detection on these documents and keep fluidity on
videos and documents
How can i make difference between real video, and documents with images?
(1) Why does the driver send frequent updates? Does the rectangles that are being updated really change? Can it be prevented on the driver side?
(2) If the area that is being refreshed doesn't change much, we can apply a quick comparison of sampled regions of 2 successive "frames", and if most of the pixels stay the same, we won't consider those "frames" as part of a video stream. (for such scenarios we would also like to improve and employ the GLZ encoding, or change our caching mechanism, to be applied on slices of bitmaps)
I think I will investigate on the 2nd point.
Code that is related to video streams is located in red_worker.c, in routines with "stream|upgrade" in their names.On what part of the spice-server code can i make changes?
Regards,
Thanks,
Matilde.
Yonit.
Matilde.
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