look at this: samsung nc10 bootchart with mobil V2

[Brian Maly]

Harald Hoyer wrote:
> Brian Maly wrote:
>> Simo Sorce wrote:
>>>
>>>  
>>>>> Why fedora's udev seem to slow down another bit while moblin's 
>>>>> udev seem
>>>>> not ?
>>>>>       
>>>> The second udev is just more rules.
>>>>     
>>>
>>> What about parallelizing udev and rc like in moblin ? Any gotcha 
>>> there ?
>>>
>>> Simo.
>>>
>>>   
>>
>> What would happen if you parallelizing udev and rc on some ancient 
>> piece of hardware? Im thinking you might not ever get to a boot screen.
>> But you could check to see what sort of CPU you have and parallelize 
>> conditionally if the hardware can handle it. Conceptually I think 
>> parallelizing this stuff is a novel idea. Its feasible in that its 
>> been done (i.e. the demo). And if we could optimize udev a bit we 
>> might gain a few more seconds there too.
>> Good topic of discussion anyway...
>>
>>
>> Brian
>>
>>
>
> And how do you know, that an rc script does not need a device, which 
> is created by udev?
>
Yeah, there would certainly have to be dependencies in the rc scripts. I 
would imagine if one of the rc scripts needed a device, it would be in a 
wait state until the device comes up. The mechanism to achieve this 
seems somewhat crucial. It will be interesting to discover how Moblin 
addresses this issue.

Brian