processor enters c2 during quicktime view causing choppy playback

From: lv2jmp (lv2jmp_at_discussions.microsoft.com)
Date: 09/16/04 

Date: Thu, 16 Sep 2004 08:49:03 -0700

I have XPsp1 home on an Athlon XP 2000+ (A5) running on a ECS L7VMM2
mainboard. During quicktime (6.5.1) playback, the video randomly pauses.
The performance tool (admin tools > performance) shows the system entering
c2 at 100% during these pauses, and the perf tool itself pauses its updates
during this time. The C2 transitions/sec hover about 800 during playback,
dropping to 300-400 during the 'pauses'. Processor hovers between 20-30 with
no peaks outside this range during this time.

Why is my system entering C2 so often, especially during real time
applications like video playback, and how do I control it/prevent it?

Relevant Pages

  • Re: [REPORT] 2.6.21 vs. 2.6.21-sd046 vs. 2.6.21-CFSv7
    ... base 2.6.21 showed some pauses and after the pause the sound got louder for a short time. ... With sd-0.46 the playback had many glitches and finally just stopped with the display looping on a small number of frames and no sound. ... The skips were repeatable, the hang was only two of five runs, I didn't let them go until the make finished but killed the mplayer after 10-15 sec. ... All tests gave acceptable typing echo, it seems that X is getting enough time at that load to echo without major issues. ...
    (Linux-Kernel)
  • Re: DVD playback peformance
    ... > and 256 Mb RAM) to playback DVD movies without choppiness? ... but get pauses in the video stream every few ... I have smooth playback on a Duron 650. ...
    (comp.unix.bsd.freebsd.misc)
  • DVD playback peformance
    ... but get pauses in the video stream every few ... I get the best performance from ogle - but I still get jerky playback. ...
    (comp.unix.bsd.freebsd.misc)