Comments on: Chasing the cause for performance degradation http://www.0xcafefeed.com/2008/03/chasing-the-cause-for-performance-degradation/ Thoughts on Java™, Java EE™ and web application development Fri, 30 Apr 2010 07:48:43 +0000 hourly 1 http://wordpress.org/?v=3.0 By: Rajiv http://www.0xcafefeed.com/2008/03/chasing-the-cause-for-performance-degradation/comment-page-1/#comment-123 Rajiv Thu, 05 Jun 2008 16:43:02 +0000 http://www.0xCAFEFEED.com/?p=18#comment-123 Got my spanking new 9 cell battery today. It feels amazing to have to run scurrying for a power outlet every time I start my laptop! Unfortunately, when I run the tests, it still shows that when running on battery it runs at 1/3rd of the rated clock speed even if there is a CPU intensive process running. :( Hmmm ... gotta try on couple of other laptops and see if they behave the same ... Got my spanking new 9 cell battery today. It feels amazing to have to run scurrying for a power outlet every time I start my laptop!

Unfortunately, when I run the tests, it still shows that when running on battery it runs at 1/3rd of the rated clock speed even if there is a CPU intensive process running. :(

Hmmm … gotta try on couple of other laptops and see if they behave the same …

]]> By: Gil Megidish http://www.0xcafefeed.com/2008/03/chasing-the-cause-for-performance-degradation/comment-page-1/#comment-97 Gil Megidish Thu, 22 May 2008 14:09:22 +0000 http://www.0xCAFEFEED.com/?p=18#comment-97 Please, for God's sake, don't add java code to detect low clock speeds :S It's not your fault if somebody disconnects from power. And quite frankly, that was my first guess. Keep writing your stuff, and let CPU-Z worry about alarming people in systray that their computer is running at low clock. Cheers! Please, for God’s sake, don’t add java code to detect low clock speeds :S
It’s not your fault if somebody disconnects from power. And quite frankly, that was my first guess. Keep writing your stuff, and let CPU-Z worry about alarming people in systray that their computer is running at low clock.

Cheers!

]]> By: Rajiv http://www.0xcafefeed.com/2008/03/chasing-the-cause-for-performance-degradation/comment-page-1/#comment-86 Rajiv Sat, 17 May 2008 06:15:59 +0000 http://www.0xCAFEFEED.com/?p=18#comment-86 Windows->Control Panel->Power options has options to only turn off monitor/hard disc. Nothing to enable/disable SpeedStep. Am I looking at the wrong place? Checked my BIOS settings. It has option to only enable/disable SpeedStep. Nothing to fine tune it. The only thing I am suspecting is that on boot up it shows me a warning: <blockquote>Your battery is charging normally, however it is reaching the end of its usable life. You can experience a longer operating time with a new battery. You may want to consider purchasing a replacement battery now.</blockquote> If the battery is able to take the load of my display with full brightness, I think it can handle the additional power required to run CPU at full clock speed. Anyways a replacement battery is being manufactured currently (that's what the Dell guys said!) and should ship to me in about 3 weeks. Wonder if things will be different with the new battery (though I suspect not). Windows->Control Panel->Power options has options to only turn off monitor/hard disc. Nothing to enable/disable SpeedStep. Am I looking at the wrong place?

Checked my BIOS settings. It has option to only enable/disable SpeedStep. Nothing to fine tune it.

The only thing I am suspecting is that on boot up it shows me a warning:

Your battery is charging normally, however it is reaching the end of its usable life. You can experience a longer operating time with a new battery. You may want to consider purchasing a replacement battery now.

If the battery is able to take the load of my display with full brightness, I think it can handle the additional power required to run CPU at full clock speed. Anyways a replacement battery is being manufactured currently (that’s what the Dell guys said!) and should ship to me in about 3 weeks. Wonder if things will be different with the new battery (though I suspect not).

]]> By: Alexander Langer http://www.0xcafefeed.com/2008/03/chasing-the-cause-for-performance-degradation/comment-page-1/#comment-81 Alexander Langer Wed, 14 May 2008 20:35:31 +0000 http://www.0xCAFEFEED.com/?p=18#comment-81 Not per se. It just uses different schemes. You an play around a bit with XP's energy settings in the control panel. But in my case, I have to say it doesn't make a noticeable difference. When my good old Dell Inspiron 8600 runs on battery (which it does right now) I get it to run an 1.2 and 1.8 GHz without any problems... Not per se. It just uses different schemes. You an play around a bit with XP’s energy settings in the control panel. But in my case, I have to say it doesn’t make a noticeable difference. When my good old Dell Inspiron 8600 runs on battery (which it does right now) I get it to run an 1.2 and 1.8 GHz without any problems…

]]> By: Rajiv http://www.0xcafefeed.com/2008/03/chasing-the-cause-for-performance-degradation/comment-page-1/#comment-80 Rajiv Wed, 14 May 2008 17:09:19 +0000 http://www.0xCAFEFEED.com/?p=18#comment-80 Hi Alexander, SpeedStep increases the clock speed automatically as load increases <b>IF</b> your laptop is connected to power source (see third screenshot). If your laptop is disconnected from power source it always keeps it at low speed (see first screenshot). Rajiv Hi Alexander,

SpeedStep increases the clock speed automatically as load increases IF your laptop is connected to power source (see third screenshot). If your laptop is disconnected from power source it always keeps it at low speed (see first screenshot).

Rajiv

]]> By: Alexander Langer http://www.0xcafefeed.com/2008/03/chasing-the-cause-for-performance-degradation/comment-page-1/#comment-78 Alexander Langer Tue, 13 May 2008 23:28:38 +0000 http://www.0xCAFEFEED.com/?p=18#comment-78 I can't think of any problems arising from using SpeedStep in ordinary applications. The CPU is very sensitive to it's load and increases core / cache / bus speeds immediately when needed. I don't know what's wrong in your case but all computers I know work just perfectly as they should. My Dell notebook's got the same cpu.. at least it did for more than three years until I had a chance to upgrade to 1.8 GHz (not much of an upgrade really). Looking forward to my iMac to arrive... I also manage some AMD servers which have Cool&Quiet enabled (AMD's version of SpeedStep) and there's also no problem... I can’t think of any problems arising from using SpeedStep in ordinary applications. The CPU is very sensitive to it’s load and increases core / cache / bus speeds immediately when needed. I don’t know what’s wrong in your case but all computers I know work just perfectly as they should.

My Dell notebook’s got the same cpu.. at least it did for more than three years until I had a chance to upgrade to 1.8 GHz (not much of an upgrade really). Looking forward to my iMac to arrive…

I also manage some AMD servers which have Cool&Quiet enabled (AMD’s version of SpeedStep) and there’s also no problem…

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