On Tue, Feb 15, 2005 at 12:12:16PM -0700, Blair Preston wrote:
> For those that were interested in the nVidia 6600GT performance using
> mythcommflag.
>
> 24 - is a 720p broadcast/recording
> CSI is a 1080i broadcast/recording
>
> I was using my system for client support work while this stuff was being
> flagged, had ACID up polling remote SNORT logs with a couple of mail clients
> and a Network Management console. I'll do a cleaner test if anyone would like
> me too. Not sure what y'all want to see, I a 6 week old myth user.
Let me clarify what the benchmark I am suggesting is. You want to
see what sort of frame rate mythcommflag gets _while you are playing video_
Ie. you want to start a video playing (such as a 720p one) and then bring
up another window and do a test run of mythcommflag.
This measures how much "spare" capacity your system has while playing
the video, and most importantly, it measures it from the standpoint of
the most common intensive thing we ask our systems to do while we are
watching a video -- commflag (or transcode would be another test.)
To do this benchmark:
a) First record, as you did, the commflag frame rate with no video
playing.
b) Then play a 720p video, and note the rate. You must start a new
commflag , since it reports a cumulative frame rate not
instantaneous.
c) Then play a 1080i video or any other you want to test, and see
the frame rate.
With video playback, you can't easily benchmark because it goes at
a constant rate. Anything less than about 80% saturation will probably
play the video fine, but the closer you are to 100%, the more at risk you
are for jitter if other things fire up on your system.
However, top/mpstat can give confusing numbers for idle time on SMP and
hyperthreaded systems. Thus this non-synthetic benchmark.
We're just working out some rough numbers. To make this a more formal
benchmark we'll need to get some standardized video snippets to loop
and standard ones to commflag or transcode.
Aside from answering questions of what systems to buy, and how to
best configure them, we might also find out what systems are minimal
more precisely.
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