Prev: messenger plus! live
Next: Modification of signal using short term Fourier transform
From: rich_158 on 18 Jun 2008 03:16
hi

i would like to qualify the speed of an algorithm on a desktop PC. I know
that a mips calculation is not really accurate but i just require something
that will give a basic indication of speed so i can estimate and work on
reducing the algorithm complexity in quite a formal.

thanks
From: rajesh on 18 Jun 2008 07:24
On Jun 18, 12:16 pm, "rich_158" <eecod...(a)hotmail.com> wrote:
> hi
>
> i would like to qualify the speed of an algorithm on a desktop PC. I know
> that a mips calculation is not really accurate but i just require something
> that will give a basic indication of speed so i can estimate and work on
> reducing the algorithm complexity in quite a formal.
>
> thanks

the following code can be used to calculate cycles and time


#include <time.h>

main()
{

clock_t s_time, e_time;
double t_time;


s_time=clock();
Function();
e_time=clock();

size =
t_time=(e_time-s_time)/(double)(CLOCKS_PER_SEC);
printf("Time taken by Function ---> %4.5f seconds\n", t_time);

}
From: VelociChicken on 20 Jun 2008 14:00
"rich_158" <eecoding(a)hotmail.com> wrote in message
news:JZGdnQQfNLOgK8XVnZ2dnUVZ_t_inZ2d(a)giganews.com...
> hi
>
> i would like to qualify the speed of an algorithm on a desktop PC. I know
> that a mips calculation is not really accurate but i just require
> something
> that will give a basic indication of speed so i can estimate and work on
> reducing the algorithm complexity in quite a formal.
>
> thanks

Windows has a high speed counter, here's the msdn reference:

http://msdn.microsoft.com/en-us/library/ms644904(VS.85).aspx

I beleive your supposed to get the Hz of your hardware with
QueryPerformanceFrequency, then use QueryPerformanceCounter to grab the
counter value.
Seomthing like:-

Done once:
QueryPerformanceFrequency((LARGE_INTEGER*)&freq64);
freq = 1000.0f / (double)freq64;

Counter:








From: VelociChicken on 20 Jun 2008 14:04
Sorry, I pressed a short-cut key and it sent accidentally, finished
example:-

>> i would like to qualify the speed of an algorithm on a desktop PC. I
>> know
>> that a mips calculation is not really accurate but i just require
>> something
>> that will give a basic indication of speed so i can estimate and work on
>> reducing the algorithm complexity in quite a formal.
>>
>> thanks

Windows has a high speed counter, here's the msdn reference:

http://msdn.microsoft.com/en-us/library/ms644904(VS.85).aspx

I beleive your supposed to get the Hz of your hardware once with
QueryPerformanceFrequency, then use QueryPerformanceCounter to grab the
counter value.

Something like:-

Done once:
__int64 freq64;
QueryPerformanceFrequency((LARGE_INTEGER*)&freq64);
freq = 1000.0f / (double)freq64;

Get time:
QueryPerformanceCounter((LARGE_INTEGER*)&time64;
return (time64*freq); // In milliseconds.










 | 
Pages: 1
Prev: messenger plus! live
Next: Modification of signal using short term Fourier transform