Deferred Procedure Calls problem

- sakuza_warrior şöyle demiş...
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- 21 Ağu 2008, 09:19
Deferred Procedure Calls problem

Hi,

Recently I noticed that my computer (laptop) is under load (~50%) even if I'm not producing any load. Also it (task manager) didn't show (hidden usage) what process was using so much CPU time.

Then I ran Process "Explorer" and noticed that Deferred Procedure Calls (DPC) usage is constantly pretty high (~50%). To be sure that I don't have malfunctional hardware or driver problems I ran some diagnostics and reinstalled video and audio drivers. As I excepted then everything was fine and working.

After I ran KernRate I found that my sound chip driver (camc6hal.sys) produces such high load.

I noticed yesterday that DPC usage will increase instantly if I pause or stop my media player (foobar2000, sometimes WMP, but also tested it with Winamp), so I made some tests.

1.
Media player status: playing
Last.fm client status: running

2.
Media player status: playing
Last.fm client status: not running

3.
Media player status: stopped
Last.fm client status: running

4.
Media player status: stopped
Last.fm client status: not running

I didn't run any debugger, but seems that last.fm client (or plugin) panically tries to communicate with my sound device.

OS: Windows XP Professional
Sound chip: Conexant AMC

I didn't found older version of last.fm client, but it would be cool if I can test it with older version (they was working fine) of last.fm client. Then I can be really sure that isn't hardware issue.

[quote][b][user]sakuza_warrior[/user][/b] şöyle demiş: Hi, Recently I noticed that my computer (laptop) is under load (~50%) even if I'm not producing any load. Also it (task manager) didn't show (hidden usage) what process was using so much CPU time. Then I ran Process "Explorer" and noticed that [url=http://en.wikipedia.org/wiki/Deferred_Procedure_Call]Deferred Procedure Calls[/url] (DPC) usage is constantly pretty high (~50%). To be sure that I don't have malfunctional hardware or driver problems I ran some diagnostics and reinstalled video and audio drivers. As I excepted then everything was fine and working. After I ran [url=http://www.microsoft.com/whdc/system/sysperf/krview.mspx]KernRate[/url] I found that my sound chip driver (camc6hal.sys) produces such high load. [img]http://img84.imageshack.us/img84/2551/kernratela4.png[/img] I noticed yesterday that DPC usage will increase instantly if I pause or stop my media player (foobar2000, sometimes WMP, but also tested it with Winamp), so I made some tests. [b]1.[/b] Media player status: playing Last.fm client status: running [img]http://img134.imageshack.us/img134/5746/playwithlastfmfg8.png[/img] [b]2.[/b] Media player status: playing Last.fm client status: not running [img]http://img134.imageshack.us/img134/1637/playwithoutlastfmls8.png[/img] [b]3.[/b] Media player status: stopped Last.fm client status: running [img]http://img134.imageshack.us/img134/5104/stoppausewithlastfmlo7.png[/img] [b]4.[/b] Media player status: stopped Last.fm client status: not running [img]http://img233.imageshack.us/img233/1879/stoppausewithoutlastfmul3.png[/img] I didn't run any debugger, but seems that last.fm client (or plugin) panically tries to communicate with my sound device. OS: Windows XP Professional Sound chip: Conexant AMC [i]I didn't found older version of last.fm client, but it would be cool if I can test it with older version (they was working fine) of last.fm client. Then I can be really sure that isn't hardware issue.[/i][/quote]

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- dougma şöyle demiş...
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- 21 Ağu 2008, 13:05
Re: Deferred Procedure Calls problem

sakuza_warrior said:
I noticed yesterday that DPC usage will increase instantly if I pause or stop my media player (foobar2000, sometimes WMP, but also tested it with Winamp), so I made some tests.

curious... it's almost certainly going to be a hardware/driver problem. possibly agravated by lastfm as you've noticed. checked for latest drivers?

[quote][b][user]dougma[/user][/b] şöyle demiş: [quote][b][user]sakuza_warrior[/user][/b] said: I noticed yesterday that DPC usage will increase instantly if I pause or stop my media player (foobar2000, sometimes WMP, but also tested it with Winamp), so I made some tests. [/quote] curious... it's almost certainly going to be a hardware/driver problem. possibly agravated by lastfm as you've noticed. checked for latest drivers?[/quote]

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- sakuza_warrior şöyle demiş...
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- 21 Ağu 2008, 16:44
Downgraded to version 1.5.1.29527 and voila... it is working normally again... Houston we have a problem! :( BUG!

dougma, yes I did it (reinstalled audio and video drivers) and quite many times, but no help. Also I reinstalled last.fm client (version 1.5.2) least 4 times, but again - no help.

[quote][b][user]sakuza_warrior[/user][/b] şöyle demiş: Downgraded to version 1.5.1.29527 and voila... it is working normally again... Houston we have a problem! :( BUG! [b]dougma[/b], yes I did it (reinstalled audio and video drivers) and quite many times, but no help. Also I reinstalled last.fm client (version 1.5.2) least 4 times, but again - no help.[/quote]

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- dougma şöyle demiş...
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- 21 Ağu 2008, 17:36
sakuza_warrior said:
Downgraded to version 1.5.1.29527 and voila... it is working normally again... Houston we have a problem! :( BUG!

Nice work with the bi-section!

Next-step would be to diff. :)

[quote][b][user]dougma[/user][/b] şöyle demiş: [quote][b][user]sakuza_warrior[/user][/b] said: Downgraded to version 1.5.1.29527 and voila... it is working normally again... Houston we have a problem! :( BUG! [/quote] Nice work with the bi-section! Next-step would be to diff. :)[/quote]

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- sakuza_warrior şöyle demiş...
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- 26 Ağu 2008, 13:23
Anyway, I have been using 1.5.1 version 3 days for now and everything seems to be ok. I tried once again 1.5.2 version, but I had same problems like before.

[quote][b][user]sakuza_warrior[/user][/b] şöyle demiş: Anyway, I have been using 1.5.1 version 3 days for now and everything seems to be ok. I tried once again 1.5.2 version, but I had same problems like before.[/quote]

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- dougma şöyle demiş...
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- 27 Ağu 2008, 15:42
sakuza_warrior said:
Anyway, I have been using 1.5.1 version 3 days for now and everything seems to be ok. I tried once again 1.5.2 version, but I had same problems like before.
Interesting... because according to http://static.last.fm/client/ChangeLog.txt all that's changed from 1.5.1.29527 is translations.

[quote][b][user]dougma[/user][/b] şöyle demiş: [quote][b][user]sakuza_warrior[/user][/b] said: Anyway, I have been using 1.5.1 version 3 days for now and everything seems to be ok. I tried once again 1.5.2 version, but I had same problems like before.[/quote] Interesting... because according to http://static.last.fm/client/ChangeLog.txt all that's changed from 1.5.1.29527 is translations.[/quote]

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Deferred Procedure Calls problem

Deferred Procedure Calls problem

Re: Deferred Procedure Calls problem