Re: sched_yield() makes OpenLDAP slow

["linux-os \(Dick Johnson\)" <linux-os@analogic.com>]

On Mon, 22 Aug 2005, Robert Hancock wrote:

> linux-os (Dick Johnson) wrote:
>> I reported thet sched_yield() wasn't working (at least as expected)
>> back in March of 2004.
>>
>>  		for(;;)
>>                      sched_yield();
>>
>> ... takes 100% CPU time as reported by `top`. It should take
>> practically 0. Somebody said that this was because `top` was
>> broken, others said that it was because I didn't know how to
>> code. Nevertheless, the problem was not fixed, even after
>> schedular changes were made for the current version.
>
> This is what I would expect if run on an otherwise idle machine.
> sched_yield just puts you at the back of the line for runnable
> processes, it doesn't magically cause you to go to sleep somehow.
>

When a kernel build is occurring??? Plus `top` itself.... It damn
well sleep while giving up the CPU. If it doesn't it's broken.

> --
> Robert Hancock      Saskatoon, SK, Canada
> To email, remove "nospam" from hancockr@nospamshaw.ca
> Home Page: http://www.roberthancock.com/
>


Cheers,
Dick Johnson
Penguin : Linux version 2.6.12.5 on an i686 machine (5537.79 BogoMips).
Warning : 98.36% of all statistics are fiction.
.
I apologize for the following. I tried to kill it with the above dot :

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