Spice performance

Tuesday, May 23, 2017

The performance of H264 streaming from NVIDIA card to a Mac client is really bad. This seems to be true whether I connect from a Mac client or from a Linux client. I see rather long latency (about 2 seconds), and quite low refresh rates (5-10 Hz tops).

At this point, it is hard to tell where the problem is. It could be on the client side, or it could be the lack of hardware decoding for H264. I have very high CPU utilization, mostly in WIO according to xosview.

Performance benchmarking tool

I started designing a shared-memory interface for the recorder so that I could use it to record live information, notably about performance. Then I could use my recorder branch for Spice to gather data.

Red Skin Cat

Daily rants and notes about my work on Spice at Red Hat

May 2017
Sun Mon Tue Wed Thu Fri Sat
1 2 3 4 5 6
7 8 9 10 11 12 13
14 15 16 17 18 19 20
21 22 23 24 25 26 27
28 29 30 31
Apr  Jun
RSS

Links

This is the work blog of Christophe de Dinechin for Red Hat. Think of it as a public lab book.

This should not be particularly interesting except to myself. It's really more intended as a set of personal notes, so there is no formatting whatsoever. I type tings as I go along during the day. All you'll find here are things like stack traces, Linux commands I want to remember or bugzilla links I want to be able to return to.

If you want to read stuff about my work at Red Hat that I believe is more interesting to the general public, you will find it on A Spice Odyssey. If you want to read my rants about everything else, go to Grenouille Bouillie. This is about as much advertisement as you will find on this site.

2016-2017 - Christophe de Dinechin

All views expressed on this blog are strictly personal. This blog does not represent the views of my employer, nor mine for that matter. This blog is provided as-is, without warrrany of any kind, express or implied, in particular regarding accuracy or interest of the content. The contents of this blog is distributed under a Creative Commons BY-SA 4.0 license .