2.6.9-rc1-mm4 - slowdown?

2.6.9-rc1-mm4 - slowdown?

[Lukas Hejtmanek]

Hello,

I have fish-fillets game ported to linux. Under 2.6.9-rc1-bk9 it eats up to 10%
with normal speed of game and up to 40% with fast mode.
Under 2.6.9-rc1-mm4 it eats up to 40% with normal speed of game and cpu is too
slow for fast mode.

Any ideas?

For both kernels I use almost the same .config.

-- 
Lukáš Hejtmánek

Re: 2.6.9-rc1-mm4 - slowdown?

[Rafael J. Wysocki]

On Sunday 12 of September 2004 18:11, Lukas Hejtmanek wrote:
> Hello,
> 
> I have fish-fillets game ported to linux. Under 2.6.9-rc1-bk9 it eats up to 
10%
> with normal speed of game and up to 40% with fast mode.
> Under 2.6.9-rc1-mm4 it eats up to 40% with normal speed of game and cpu is 
too
> slow for fast mode.
> 
> Any ideas?

Yup.  You've just discovered a difference between the nicksched and the 
"stock" CPU scheduler, it seems. ;-)

Greets,
RJW

-- 
- Would you tell me, please, which way I ought to go from here?
- That depends a good deal on where you want to get to.
		-- Lewis Carroll "Alice's Adventures in Wonderland"

Re: 2.6.9-rc1-mm4 - slowdown?

[Gene Heskett]

On Sunday 12 September 2004 12:52, Rafael J. Wysocki wrote:
>On Sunday 12 of September 2004 18:11, Lukas Hejtmanek wrote:
>> Hello,
>>
>> I have fish-fillets game ported to linux. Under 2.6.9-rc1-bk9 it
>> eats up to
>
>10%
>
>> with normal speed of game and up to 40% with fast mode.
>> Under 2.6.9-rc1-mm4 it eats up to 40% with normal speed of game
>> and cpu is
>
>too
>
>> slow for fast mode.
>>
>> Any ideas?
>
>Yup.  You've just discovered a difference between the nicksched and
> the "stock" CPU scheduler, it seems. ;-)

Humm, could this explain why, when I was running amflush this morning 
after my journalling failure and subsequent reboot, that the data 
being copied from /dev/hda7 to /dev/hdb2 was moving at the grand 
total of about 40k to 50k/second instead of the >20MB/sec I expected?

-- 
Cheers, Gene
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