system speed

system speed

[Biplab Sarkar]

Hi,

 I am new to this list. I have a question would be
greatful if anyone answers it.

I have observed that my linux PC (Celeron-633Mhz) runs
significantly slow after I have installed Mandrake-9.2
which has kernel (2.4.22). My earlier kernel was
2.2.22 (mandrake 7.2). The speed seems to be slow
right from the bootup sequence. 

I have also observed that if I do an abnormal shutdown
of the system (by pressing the reset button of the
computer) the system speeds up significantly somewhat
comparable to my old kernel speed. Right from the
bootup sequence every thing runs fast. 

I have also observed that the CPU utilization is very
high for case when the I try a normal shutdown
followed by a bootup. I could not see any single 
process that would be hogging the CPU. It seems like
any process that gets the CPU likes to hog the CPU.


Any idea what is it that is causing the system to run
faster when we have an abnormal shutdown of the
system?

Thanks,
Biplab


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Re: system speed

[Richard B. Johnson]

On Mon, 5 Jan 2004, Biplab Sarkar wrote:

> Hi,
>
>  I am new to this list. I have a question would be
> greatful if anyone answers it.
>
> I have observed that my linux PC (Celeron-633Mhz) runs
> significantly slow after I have installed Mandrake-9.2
> which has kernel (2.4.22). My earlier kernel was
> 2.2.22 (mandrake 7.2). The speed seems to be slow
> right from the bootup sequence.
>
> I have also observed that if I do an abnormal shutdown
> of the system (by pressing the reset button of the
> computer) the system speeds up significantly somewhat
> comparable to my old kernel speed. Right from the
> bootup sequence every thing runs fast.
>
> I have also observed that the CPU utilization is very
> high for case when the I try a normal shutdown
> followed by a bootup. I could not see any single
> process that would be hogging the CPU. It seems like
> any process that gets the CPU likes to hog the CPU.
>
>
> Any idea what is it that is causing the system to run
> faster when we have an abnormal shutdown of the
> system?
>
> Thanks,
> Biplab

After you hit the reset button, the BIOS will perform a cold-boot
which means everything gets initialized from scratch. Aside from
the file-system rebuild that occurs when you improperly shut-down
a system, there should be no additional history and, therefore,
no difference in performance before and after your shutdown sequence.

If you execute `top` you should clearly see what process, if any,
is hogging the CPU.

Cheers,
Dick Johnson
Penguin : Linux version 2.4.22 on an i686 machine (797.90 BogoMips).
            Note 96.31% of all statistics are fiction.

System speed

[Fred Bleuzet]

Hi all,
I'd like to know what configuration would be faster:
Computer 1: 1 CPU at 2GHz
Computer 2: 2 CPUs at 1GHz each.

Sorry if the question is simple...
Thanks,
Fred