System call which gets CPU utilized capacity

System call which gets CPU utilized capacity

[Alex Vinokur]

Is there in CYGWIN any system call which gets CPU utilized capacity at the present moment?
For instance :
int get_cpu_usage() which returns the percentage of used capacity.

I would like to write in my C-program something like :

if (get_cpu_usage() < 20)
{
   foo1();  // calling foo1() will be postponed
}
else
{
   foo2();
}

--
   =====================================
   Alex Vinokur
     mailto:alexvn@connect.to
     http://mathforum.org/library/view/10978.html
   =====================================








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Re: System call which gets CPU utilized capacity

[Igor Pechtchanski]

On Wed, 10 Sep 2003, Alex Vinokur wrote:

> Is there in CYGWIN any system call which gets CPU utilized capacity at
> the present moment?
> For instance :
> int get_cpu_usage() which returns the percentage of used capacity.
>
> I would like to write in my C-program something like :
>
> if (get_cpu_usage() < 20)
> {
>    foo1();  // calling foo1() will be postponed
> }
> else
> {
>    foo2();
> }

I assume the call is the same as in any other Unix system, since "top"
worked for me with almost no porting about a year ago.  You might want to
take a look at the sources for the "procps" package.
	Igor
-- 
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Re: System call which gets CPU utilized capacity

[Cliff Hones]

Alex Vinokur wrote
> "Igor Pechtchanski" <pechtcha@cs.nyu.edu> wrote in message
news:Pine.GSO.4.56.0309100918590.5235@slinky.cs.nyu.edu...
> > On Wed, 10 Sep 2003, Alex Vinokur wrote:
> >
> > > Is there in CYGWIN any system call which gets CPU utilized capacity at
> > > the present moment?
> >
> [snip]
> > I assume the call is the same as in any other Unix system, since "top"
> > worked for me with almost no porting about a year ago.  You might want
to
> > take a look at the sources for the "procps" package.
> > Igor
> [snip]
>
> But "top" and "ps" are the UNIX (CYGWIN) command line utilities.
> We can't use them in C-program unless with system().
>  I mean platform-specific system call (as the popen() system call) which
> can be directly used in C-program.

Igor is saying that since 'top' can find the CPU capacity, you just need to
look at the source of top (in procps) to find out how to do it.

-- Cliff


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Re: System call which gets CPU utilized capacity

[Alex Vinokur]

"Cliff Hones" <cliff@aonix.co.uk> wrote in message news:007f01c37833$a42773a0$12760251@ximenes...
> Alex Vinokur wrote
> > "Igor Pechtchanski" <pechtcha@cs.nyu.edu> wrote in message
> news:Pine.GSO.4.56.0309100918590.5235@slinky.cs.nyu.edu...
> > > On Wed, 10 Sep 2003, Alex Vinokur wrote:
> > >
> > > > Is there in CYGWIN any system call which gets CPU utilized capacity at
> > > > the present moment?
> > >
> > [snip]
> > > I assume the call is the same as in any other Unix system, since "top"
> > > worked for me with almost no porting about a year ago.  You might want
> to
> > > take a look at the sources for the "procps" package.
> > > Igor
> > [snip]
> >
> > But "top" and "ps" are the UNIX (CYGWIN) command line utilities.
> > We can't use them in C-program unless with system().
> >  I mean platform-specific system call (as the popen() system call) which
> > can be directly used in C-program.
>
> Igor is saying that since 'top' can find the CPU capacity, you just need to
> look at the source of top (in procps) to find out how to do it.
>
> -- Cliff
>
>

Thanks.

http://www.cygwin.com/packages/procps/procps-010801-1-src
contains _list_ of procps' sources (including top.c and top.h) :
Sun Jan 14 10:40:14 2001          45360 procps-010801/top.c
Sun Jan 14 10:41:29 2001           7242 procps-010801/top.h

Where can one get the sources themselves ?
http://www.cygwin.com/packages/procps/procps-010801/top.c
and
http://www.cygwin.com/packages/procps/procps-010801/top.h
don't exist.

   =====================================
   Alex Vinokur
     mailto:alexvn@connect.to
     http://mathforum.org/library/view/10978.html
   =====================================






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Re: System call which gets CPU utilized capacity

[Alex Vinokur]

"Igor Pechtchanski" <pechtcha@cs.nyu.edu> wrote in message news:Pine.GSO.4.56.0309100918590.5235@slinky.cs.nyu.edu...
> On Wed, 10 Sep 2003, Alex Vinokur wrote:
>
> > Is there in CYGWIN any system call which gets CPU utilized capacity at
> > the present moment?
>
[snip]
> I assume the call is the same as in any other Unix system, since "top"
> worked for me with almost no porting about a year ago.  You might want to
> take a look at the sources for the "procps" package.
> Igor
[snip]

But "top" and "ps" are the UNIX (CYGWIN) command line utilities.
We can't use them in C-program unless with system().
 I mean platform-specific system call (as the popen() system call) which can be directly used in C-program.

   =====================================
   Alex Vinokur
     mailto:alexvn@connect.to
     http://mathforum.org/library/view/10978.html
   =====================================






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Re: System call which gets CPU utilized capacity

[Cliff Hones]

Alex Vinokur wrote:
> http://www.cygwin.com/packages/procps/procps-010801-1-src
> contains _list_ of procps' sources (including top.c and top.h) :
> Sun Jan 14 10:40:14 2001          45360 procps-010801/top.c
> Sun Jan 14 10:41:29 2001           7242 procps-010801/top.h
> 
> Where can one get the sources themselves ?
> http://www.cygwin.com/packages/procps/procps-010801/top.c
> and
> http://www.cygwin.com/packages/procps/procps-010801/top.h
> don't exist.

You download the source of the package using setup.exe.  Run
setup, and when it gets to the "Select Packages" dialog find
the procps package and tick the little square box under the
"Src" column.

-- Cliff

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Re: System call which gets CPU utilized capacity

[Alex Vinokur]

"Cliff Hones" <cliff@aonix.co.uk> wrote in message news:05da01c37889$bb6ecf80$cd8a9dc0@uk.aonix.com...
> Alex Vinokur wrote:
> > http://www.cygwin.com/packages/procps/procps-010801-1-src
> > contains _list_ of procps' sources (including top.c and top.h) :
> > Sun Jan 14 10:40:14 2001          45360 procps-010801/top.c
> > Sun Jan 14 10:41:29 2001           7242 procps-010801/top.h
> >
> > Where can one get the sources themselves ?
> > http://www.cygwin.com/packages/procps/procps-010801/top.c
> > and
> > http://www.cygwin.com/packages/procps/procps-010801/top.h
> > don't exist.
>
> You download the source of the package using setup.exe.  Run
> setup, and when it gets to the "Select Packages" dialog find
> the procps package and tick the little square box under the
> "Src" column.
>
Done.
Thanks.

   =====================================
   Alex Vinokur
     mailto:alexvn@connect.to
     http://mathforum.org/library/view/10978.html
   =====================================




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