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Slow down a Process

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  Slow down a Process Anton Meyninger <anton.meyninger@gmail.com> - 2011-07-08 17:44 +0200
    Re: Slow down a Process unruh <unruh@wormhole.physics.ubc.ca> - 2011-07-08 15:54 +0000
      Re: Slow down a Process Anton Meyninger <anton.meyninger@gmail.com> - 2011-07-08 18:09 +0200
        Re: Slow down a Process despen@verizon.net - 2011-07-08 12:52 -0400
          Re: Slow down a Process Anton Meyninger <anton.meyninger@gmail.com> - 2011-07-08 21:32 +0200
        Re: Slow down a Process Eli the Bearded <*@eli.users.panix.com> - 2011-07-08 16:59 +0000
        Re: Slow down a Process David Brown <david.brown@removethis.hesbynett.no> - 2011-07-09 14:53 +0200
          Re: Slow down a Process Chris Davies <chris-usenet@roaima.co.uk> - 2011-07-10 10:47 +0100
            Re: Slow down a Process David Brown <david.brown@removethis.hesbynett.no> - 2011-07-10 12:57 +0200
              Re: Slow down a Process Chris Davies <chris-usenet@roaima.co.uk> - 2011-07-10 22:15 +0100
      Re: Slow down a Process Robert Heller <heller@deepsoft.com> - 2011-07-08 12:10 -0500

#1696 — Slow down a Process

Hi,
I need to slow down a process by 50%. Is there some tool or something 
which allows me to do that?

Thanks,
Anton

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#1697

On 2011-07-08, Anton Meyninger <anton.meyninger@gmail.com> wrote:
> Hi,
> I need to slow down a process by 50%. Is there some tool or something 
> which allows me to do that?

Run it on a slower machine. 
Perhaps if you told us what you were trying to do, rather than asking
how to impliment what you think is the solution, you might get some
useful advice. 

>
> Thanks,
> Anton

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#1699

Okay, I am trying to slow down a flashgame.

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#1700

Anton Meyninger <anton.meyninger@gmail.com> writes:

> Okay, I am trying to slow down a flashgame.

Google searches tell me you are trying to cheat.

IMHO not nice to involve bystanders.

-- 
Dan Espen

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#1704

Am 08.07.2011 18:52, schrieb despen@verizon.net:
> Anton Meyninger<anton.meyninger@gmail.com>  writes:
>
>> Okay, I am trying to slow down a flashgame.
>
> Google searches tell me you are trying to cheat.

Okay, I admit it. I am trying to cheat. But that is more because of 
personal interest ;D

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#1701

In comp.os.linux.misc, Anton Meyninger  <anton.meyninger@gmail.com> wrote:
> Okay, I am trying to slow down a flashgame.

The 'warp' tool will change time as seen by a process. If it uses the
system clock to set speed, it can be warped. This part of the AT&T
software kit here:

http://www2.research.att.com/sw/download/

Pretty sure it is in ast-base.

Excerpt from the manpage:

    warp executes a dynamically linked command in a different time frame by
    intercepting time related system calls and modifying the times seen by
    command using the formula:

    time = time + warp + (time - base) * (factor - 1)

    where warp is date-now, base is date by default, and factor is 1 by
    default.

Elijah
------
lets do the time warp again...

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#1718

On 08/07/11 18:09, Anton Meyninger wrote:
> Okay, I am trying to slow down a flashgame.

Try running it on Windows...


You could also run it inside a virtual machine.  If you use QEMU, the 
simulation of the processor should make it all run significantly slower.

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#1728

David Brown <david.brown@removethis.hesbynett.no> wrote:
> You could also run it inside a virtual machine.  If you use QEMU, the 
> simulation of the processor should make it all run significantly slower.

I'm not the OP but on my system qemu is effectively a link to kqemu,
which seems to run at about 90% of real CPU.

Chris

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#1732

On 10/07/11 11:47, Chris Davies wrote:
> David Brown<david.brown@removethis.hesbynett.no>  wrote:
>> You could also run it inside a virtual machine.  If you use QEMU, the
>> simulation of the processor should make it all run significantly slower.
>
> I'm not the OP but on my system qemu is effectively a link to kqemu,
> which seems to run at about 90% of real CPU.
>

Yes, that's why I said qemu - not kqemu.  QEMU is a software simulator 
for processors, and will therefore run slowly.  kqemu is a module that 
allows qemu to run most code natively rather than simulated.  Normally 
that's what you want - it's the basis for KVM virtualisation.  But in 
this case, the OP should specifically run QEMU to force software 
emulation of the processor.

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#1736

David Brown<david.brown@removethis.hesbynett.no>  wrote:
> You could also run it inside a virtual machine.  If you use QEMU, the
> simulation of the processor should make it all run significantly slower.

On 10/07/11 11:47, Chris Davies wrote:
> on my system qemu is effectively a link to kqemu

David Brown <david.brown@removethis.hesbynett.no> wrote:
> Yes, that's why I said qemu - not kqemu.

Agreed. But like you stressed qemu rather than kqemu (or even kvm,
for that matter), I wanted to point out that qemu *is* kqemu - at least
under some circumstances.

Cheers
Chris

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#1702

At Fri, 08 Jul 2011 15:54:24 GMT unruh <unruh@wormhole.physics.ubc.ca> wrote:

> 
> On 2011-07-08, Anton Meyninger <anton.meyninger@gmail.com> wrote:
> > Hi,
> > I need to slow down a process by 50%. Is there some tool or something 
> > which allows me to do that?
> 
> Run it on a slower machine. 
> Perhaps if you told us what you were trying to do, rather than asking
> how to impliment what you think is the solution, you might get some
> useful advice. 

I suspect the OP faced a similar problem I had with a screensaver
application I wrote (the animation speeded up when run on a faster
machine).  I needed to add delay loops in the code (although something
like a call to usleep() would also work and be more *processor*
independent).

> 
> >
> > Thanks,
> > Anton
>                                  

-- 
Robert Heller             -- 978-544-6933 / heller@deepsoft.com
Deepwoods Software        -- http://www.deepsoft.com/
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/\  www.asciiribbon.org   -- against proprietary attachments


                                             

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