Arch Linux

demian

Member

From: Frankfurt, Germany

Registered: 2009-05-06

Posts: 709

patchsets: zen,ck,bfs,arch,ice,...

Hello everyone,

I'll probably install the BFS patchset tomorrow. Since I'll be at it anyway i thought i might give other patches a try, too.
Generally, i really like the Arch config and I'd like to have as few patches as possible.
But I'm curious:
How are your experiences with various patchsets?

Greets,
demian

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stqn

Member

Registered: 2010-03-19

Posts: 1,191

Website

Re: patchsets: zen,ck,bfs,arch,ice,...

I've experienced system crashes using the kernel26-pentium-m AUR package, which includes the zen patch.

I *think* the crashes were caused by the zen patch, because building kernel26 from abs also with pentium-m optimisations and the speedstep-centrino patch results in a perfectly stable system. However it might have been the kernel itself, as I'm not sure if I compiled the exact same kernel version.

brebs

Member

Registered: 2007-04-03

Posts: 3,742

Re: patchsets: zen,ck,bfs,arch,ice,...

I use and recommend pf.

ammon

Member

Registered: 2008-12-11

Posts: 413

Re: patchsets: zen,ck,bfs,arch,ice,...

Im quite happy with ck patch.

kokoko3k

Member

Registered: 2008-11-14

Posts: 2,426

Re: patchsets: zen,ck,bfs,arch,ice,...

I'm using tuxonice+bfs patchset on a little netbook with no problems.

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MadCat_X

Member

Registered: 2009-10-08

Posts: 189

Re: patchsets: zen,ck,bfs,arch,ice,...

I have a custom 2.6.34 kernel with the patchset from Con Kolivas, I guess it's pretty much the same as the kernel26-ck thing from AUR and it's awesome. Stable and swift, I recommend you give it a try...

demian

Member

From: Frankfurt, Germany

Registered: 2009-05-06

Posts: 709

Re: patchsets: zen,ck,bfs,arch,ice,...

Thank you, I've applied the ck patchset and i am compiling with 4 cores at full speed and 100% utilization.
The system is as responsive as if there were no load at all. Very impressive considering I had ugly delays with CFS in the same situation (though with -j5 instead of -j4 i'm using now).
The compiling speed went from ~1100s real to 531s.

Last edited by demian (2010-05-22 22:05:39)

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ssri

Member

Registered: 2010-02-16

Posts: 216

Re: patchsets: zen,ck,bfs,arch,ice,...

For those using the ck patchset, what configuration do you use?  Currently, I'm using Con Kolivas's lowest latency recommendation (kernel set to 1000Hz and switching off dynamic ticks) that is outlined in his BFS FAQ.  Sure, my core2duo laptop is cosiderably more responsive and does not get hung up between tasks anymore as it did with CFS, but all of this comes at the expense of my CPU running ~10C higher (CFS=51C;BFS=59-61C).  Additionally, I heard problems with virtualbox under BFS with kernel settings under 1000Hz.  Is there some magic sauce to achieving low latencies without the risk of frying my CPU?  Since PCLinuxOS uses BFS as the main scheduler in their kernels, what settings did the maintainers use?

ammon

Member

Registered: 2008-12-11

Posts: 413

Re: patchsets: zen,ck,bfs,arch,ice,...

I use 100Hz, with http://cateee.net/lkddb/web-lkddb/RCU_FAST_NO_HZ.html and dyneticks.
No problems with virtualbox, and cpu is 2-3 degs colder.

arch0r

Member

From: From the Chron-o-John

Registered: 2008-05-13

Posts: 597

Re: patchsets: zen,ck,bfs,arch,ice,...

I use and recommend pf.

looks nice, is there any aur pacakge available?

ngoonee

Forum Fellow

From: Between Thailand and Singapore

Registered: 2009-03-17

Posts: 7,358

Re: patchsets: zen,ck,bfs,arch,ice,...

PF is basically the BFS patch and TOI patch? Just use kernel26-ice and turn on BFS.

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quarkup

Member

From: Portugal

Registered: 2008-09-07

Posts: 497

Website

Re: patchsets: zen,ck,bfs,arch,ice,...

I've experienced system crashes using the kernel26-pentium-m AUR package, which includes the zen patch.

I *think* the crashes were caused by the zen patch, because building kernel26 from abs also with pentium-m optimisations and the speedstep-centrino patch results in a perfectly stable system. However it might have been the kernel itself, as I'm not sure if I compiled the exact same kernel version.

Hey all.. I'm the maintainer of this package.
Actually I've downgraded the version of the kernel26-pentium-m so it is ZEN-patchset compliant. This means there should be no errors now.

Anyway - from now on I am just updating it when the ZEN patchset is also updated.

Bye ~
quarkup

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dhave

Arch Linux f@h Team Member

From: Outside the matrix.

Registered: 2005-05-15

Posts: 1,112

Re: patchsets: zen,ck,bfs,arch,ice,...

-ck kernels have always been stable for me. On an older machine, I used to see noticeable performance improvement. On my present machine, it's not perceptible, but I still run -ck kernels since I trust Con Kolivas's work and like the innovations he introduces.

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