Arch Linux

kishd

Member

Registered: 2006-06-14

Posts: 401

kernel scheduler. which one to use.

Recently I have changed the default scheduler from cfq to deadline at runtime by appending elevator=deadline to the kernel boot parameters. I noticed that my desktop responsiveness improved significantly.

Which scheduler is the best to use? cfq, noop. deadline or as?

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---for there is nothing either good or bad, but only thinking makes it so....
Hamlet, W Shakespeare

kishd

Member

Registered: 2006-06-14

Posts: 401

Re: kernel scheduler. which one to use.

Googleing I found that the best scheduler is a rather individual thing depending on the way that you use your machine with deadline being recommended for database setups and cfq/as being recommended for desktop setups. I found that on my system as seems to give the most responsive desktop. A bit dissapointed with the latest cfq causes stutters with amarok and occasionally under load seems to slow the machine down. When I have time I will try to benchmark my system with the different schedulers. However for the meantime I will just continue using AS. Luckily it does not require a kernel rebuild to switch schedulers.

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---for there is nothing either good or bad, but only thinking makes it so....
Hamlet, W Shakespeare

BJJ

Member

Registered: 2007-10-23

Posts: 25

Re: kernel scheduler. which one to use.

I found this website interesting

wuischke

Member

From: Suisse Romande

Registered: 2007-01-06

Posts: 630

Re: kernel scheduler. which one to use.

Nice find, I didn't know about the different schedules, only used deadline as it was said to be the best for use with JFS.