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cddiede is offline cddiede
2010-11-16 , 14:37
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#1
Has anyone else seen this:

http://www.phoronix.com/scan.php?pag...37_video&num=1


If this kernel patch really does such wonders for desktop usage, perhaps it could be applied to the kernel we use for Maemo?
 

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petur is offline petur
2010-11-16 , 14:46
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#2
I don't think this will matter much on n900, unless you're compiling kernels on it all the time

I am really looking forward to titan integrating BFS, that should help much more....
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debernardis is offline debernardis
2010-11-16 , 14:55
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#3
Looking at the videos, the difference is substantial. This piece of news should reach Titan and MohammadAG as soon as possible... I wish I were able to compile a kernel on my own
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petur is offline petur
2010-11-16 , 15:48
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#4
Originally Posted by debernardis View Post
Looking at the videos, the difference is substantial.
Yes, and now stop looking at the videos and read the text that is above and below them, and more importantly, the text on page 1.

They are comparing responsiveness while overloading the system with a kernel compile using 64 threads.

As I wrote, I am sure BFS will help *much* more than this patch *on n900*
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debernardis is offline debernardis
2010-11-16 , 17:03
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#5
Isn't the n900 overloaded at times? Think app manager when invokes apt-worker in pr1.2 - is it only i/o or there is also a strenuous cpu effort? And tracker, maybe.
Could this patch be useful in such situations?
I'm curious to know the effects of the patch. Aren't you?
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eatfrog is offline eatfrog
2010-11-16 , 17:27
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#6
Originally Posted by debernardis View Post
Isn't the n900 overloaded at times? Think app manager when invokes apt-worker in pr1.2 - is it only i/o or there is also a strenuous cpu effort? And tracker, maybe.
Could this patch be useful in such situations?
I'm curious to know the effects of the patch. Aren't you?
it would have to be overloaded by several/many threads all wanting full access to the cpu. that really.. never happens on the n900.
apt-worker is just one thread, now if we had 20 of the running at the same time, and you wanted to make a phonecall at the same time, there MIGHT be some benefits with this patch.
 

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Creamy Goodness is offline Creamy Goodness
2010-11-16 , 17:30
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#7
http://talk.maemo.org/showthread.php...&highlight=bfs
 

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GameboyRMH is offline GameboyRMH
2010-11-17 , 00:32
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#8
http://www.phoronix.com/scan.php?pag...37_video&num=1

The power kernel could definitely use this

If there is going to be a PR1.4 this should be in it.
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Creamy Goodness is offline Creamy Goodness
2010-11-17 , 00:54
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#9
there's a lot of choices for which cpu & i/o scheduler to use, and it's not easy to switch between them.
come back when you can tell me what makes this patch better than the CFS or BFS, or why deadline / no-op is supposed to be good for flash memory. confused yet?

-edit-
deadline / noop is i/o scheduler, not cpu...
but my point is, you can swap them all around, it's not necessarily going to improve things.
CFQ is the default i/o scheduler for n900, palm pre, some versions of android...
BFS is used by some custom android roms, most distros use CFS though
Last edited by Creamy Goodness; 2010-11-17 at 01:24.
 
RobbieThe1st is offline RobbieThe1st
2010-11-17 , 00:56
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#10
Ooh, that looks cool. I can't wait to see someone take the latest power-kernel and add this too it - who cares if it's "officially" adopted?
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