6625WD CPU Load

In preparation for summer, I've undervolted and apply sleepfix so my 8600M GT will behave itself better.

In the course of doing so, I noticed that in RMClock my CPU's constantly working at 40-50%

Though I have no idea why it is doing so, when my OS is doing practically nothing.

Any suggestions?

 

I suspect this is more a RMClock configuration issue than something to do with the 6625WD hardware. What CPU speed does RMClock's monitoring page show when the computer is under light load?

Have you looked through the undervolting guide? Have you enabled "Use OS load-based management" on the management page?

John

 

Hmm how would I put it under light load? Core2Duo's too speedy to stress it slightly.. I have foobar2000 playing songs and webpages open with some flash.

And the speed spikes rather quickly between 600MHz (SLFM) upwards to 1.2GHz and occasionally 2.2GHz

Just wondered if everyone's also seeing the same ratio of CPU Load vs OS Load in rmclock, as it's possible that rmclock detection is off.




RMClock's relevant explanation:

CPU load - shows actual CPU load (i.e., the ratio of "active" processor cycles to the total processor cycles per given amount of time). This value is measured via CPU-specific performance monitoring counters and represents true CPU load, i.e., the amount of time the CPU spent in "non-asleep" state.
OS load - shows CPU load level as reported by the OS, in a manner similar to Windows Task Manager.

NOTE: Due to the differences in the nature and the source of the measurements, as well as the detection accuracy, the displayed CPU load and OS load values may not match. A mismatch of several percents between these values should be considered normal. Also, systems containing logical CPUs may show up to 50% mismatch between these values. This is because the OS load measures the load of the given logical processor, while the CPU load shows the load of the physical processor/core containing this logical processor.

 

playing music pulls the load up quite a lot my 1.8 T7100 goes from 30-45% (CPU load), but its mostly going in 1.2 GHz mode (clock 800). Flash also uses the CPU even if you dont see them.

Im running 008, and I have SLFM disabled as it only makes music etc unsmooth

I have disabled both "use OS load-based management" and "Enable OS power management..."

How is your Advanced CPU setting page looking?

Edit: Quite interesting that your OS load is around 10% while CPU is 50%. I have my OS load pretty close to the CPU load (right under CPU and crossing spikes)

 

"Light load" is normal light usage, such a browsing this site + whatever background processes are running. Task Manager should then show 80% or more system idle time and the CPU should be running at its lowest speed (600MHz?).

When the CPU is running at 600MHz it will have only 30% of the potential processing power that it will have at 2GHz, so 50% CPU load at 600MHz is the equivalent of 15% CPU load at 2GHz. RMClock monitors the CPU load in order to decide when to speed up the CPU (this is the target CPU level on the individual profiles pages).

I think this is what is confusing you- the CPU load is calculated based on the current CPU speed. So, provided the CPU is running slowly then a moderately high CPU load is OK. I never look at the CPU load value - I just look at the CPU speed.

Does this make sense?

John

 

Sprint: Most interesting, I think I will have to give BIOS 008 a try some day.

John: It does make perfect sense, I was just suspecting that the rmclock's behaviour will affect it's ability to ramp up/down the process cycle.

If it's showing nearl 10% level (which I think is the reasonable area), then it it'll have the extra 40% as buffer before it's ramped up.

In other words, I think RMClock's unecessarily clocking up my CPU since it's either failing to correctly determine the load, or there's something in the background that's literally keeping the CPU awake.

I had a bit of search around..

http://forum.notebookreview.com/showthread.php?t=256393
Dell M1530 - disable sigmatel audio solves it...

http://forum.rightmark.org/topic.cgi?id=6:1400
This one says it's a well known issue.. bleh..

http://forum.rightmark.org/topic.cgi?id=6:1107
This one's interesting in the part says he notices the cpu load goes down when he increases the voltage(suggesting a cpu error correcting mechnism? higher voltage gives clearer signal thus less background load?)

Anyway, rather confused will try all sorts later when I have time with my laptop..

 

Well the first link seem to make sense, your lappy is running 50 CPU and allmost none OS so its looking like the bug