[gentoo-user] Which cputime accounting for kernel-3.10.7 ?

[gentoo-user] Which cputime accounting for kernel-3.10.7 ?

[Mick]

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Hi All,

I'm about to compile a new kernel and running oldconfig brings up this new set 
of options.  There is no help available, grep-ping through the Documentation 
wasn't particularly revealing and I haven't found anything in Google to help 
me decide what I need/want out of the three:
===================================================

* CPU/Task time and stats accounting
*
Cputime accounting
  1. Simple tick based cputime accounting (TICK_CPU_ACCOUNTING)
> 2. Full dynticks CPU time accounting (VIRT_CPU_ACCOUNTING_GEN) (NEW)
  3. Fine granularity task level IRQ time accounting (IRQ_TIME_ACCOUNTING)
choice[1-3]: ?

There is no help available for this option.
Prompt: Cputime accounting
  Location:
    -> General setup
      -> CPU/Task time and stats accounting
  Defined at init/Kconfig:297
  Selected by: m
===================================================

Option 2 seems to have been selected by default, but I am not sure if this is 
right for a laptop.

What have you chosen and why?

-- 
Regards,
Mick

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Re: [gentoo-user] Which cputime accounting for kernel-3.10.7 ?

[Bruce Hill]

On Sat, Aug 24, 2013 at 10:40:25AM +0100, Mick wrote:
> Hi All,
> 
> I'm about to compile a new kernel and running oldconfig brings up this new set 
> of options.  There is no help available, grep-ping through the Documentation 
> wasn't particularly revealing and I haven't found anything in Google to help 
> me decide what I need/want out of the three:
> ===================================================
> 
> * CPU/Task time and stats accounting
> *
> Cputime accounting
>   1. Simple tick based cputime accounting (TICK_CPU_ACCOUNTING)
> > 2. Full dynticks CPU time accounting (VIRT_CPU_ACCOUNTING_GEN) (NEW)
>   3. Fine granularity task level IRQ time accounting (IRQ_TIME_ACCOUNTING)
> choice[1-3]: ?
> 
> There is no help available for this option.
> Prompt: Cputime accounting
>   Location:
>     -> General setup
>       -> CPU/Task time and stats accounting
>   Defined at init/Kconfig:297
>   Selected by: m
> ===================================================
> 
> Option 2 seems to have been selected by default, but I am not sure if this is 
> right for a laptop.
> 
> What have you chosen and why?
> 
> -- 
> Regards,
> Mick

Each of the three options has it's own individual help.
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A: Because it messes up the order in which people normally read text.
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Re: [gentoo-user] Which cputime accounting for kernel-3.10.7 ?

[Mick]

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On Saturday 24 Aug 2013 12:14:14 Bruce Hill wrote:
> On Sat, Aug 24, 2013 at 10:40:25AM +0100, Mick wrote:
> > Hi All,
> > 
> > I'm about to compile a new kernel and running oldconfig brings up this
> > new set of options.  There is no help available, grep-ping through the
> > Documentation wasn't particularly revealing and I haven't found anything
> > in Google to help me decide what I need/want out of the three:
> > ===================================================
> > 
> > * CPU/Task time and stats accounting
> > *
> > Cputime accounting
> > 
> >   1. Simple tick based cputime accounting (TICK_CPU_ACCOUNTING)
> >   
> > > 2. Full dynticks CPU time accounting (VIRT_CPU_ACCOUNTING_GEN) (NEW)
> > > 
> >   3. Fine granularity task level IRQ time accounting
> >   (IRQ_TIME_ACCOUNTING)
> > 
> > choice[1-3]: ?
> > 
> > There is no help available for this option.
> > Prompt: Cputime accounting
> > 
> >   Location:
> >     -> General setup
> >     
> >       -> CPU/Task time and stats accounting
> >   
> >   Defined at init/Kconfig:297
> >   Selected by: m
> > 
> > ===================================================
> > 
> > Option 2 seems to have been selected by default, but I am not sure if
> > this is right for a laptop.
> > 
> > What have you chosen and why?
> 
> Each of the three options has it's own individual help.

Oops!  Thanks for pointing this out and sorry for the noise ... I had only 
tried "?" instead of "<option_number> ?"

Help is also visible and available when using menuconfig.

The 2nd option is best for my needs.
-- 
Regards,
Mick

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