Cpu speed detection
Author
Hej,
I have a few questions:
- How do I determine the speed of a processor?
- Are there 3d game engines that use dual processing?
Bas
Hi! This is from page www.borland.nq.pl:
The result is in Mhz. You should do this code more than once and make an average.
const DelayTime = 500;DWORD TimerHi, TimerLo;Integer PriorityClass, Priority;PriorityClass = GetPriorityClass(GetCurrentProcess());Priority = GetThreadPriority(GetCurrentThread());SetPriorityClass(GetCurrentProcess(), REALTIME_PRIORITY_CLASS);SetThreadPriority(GetCurrentThread(), THREAD_PRIORITY_TIME_CRITICAL);Sleep(10);asm{ dw 310Fh mov TimerLo, eax mov TimerHi, edx}Sleep(DelayTime);asm{ dw 310Fh sub eax, TimerLo sbb edx, TimerHi mov TimerLo, eax mov TimerHi, edx}SetThreadPriority(GetCurrentThread, Priority);SetPriorityClass(GetCurrentProcess, PriorityClass);int CPUSpeed = TimerLo / (1000 * DelayTime);The result is in Mhz. You should do this code more than once and make an average.
@GraphicsBas:
This post is completely off-topic for the DirectX forum.
@Pipo:
Why didn't you tell him? [smile]
@gregory:
Use source tags. Read more about them at GDNet Forums FAQ
This post is completely off-topic for the DirectX forum.
@Pipo:
Why didn't you tell him? [smile]
@gregory:
Use source tags. Read more about them at GDNet Forums FAQ
In every case, remember that Centrino processor have less mhz but the same horsepower of higher mhz processor. Mhz aren't an accurate way to determine the real CPU power: at least, they are a way only inside a same family of processors. Just to be sure. :)
Quote:Original post by Coder
@Pipo:
Why didn't you tell him? [smile]
I'm not the one with a pinkred tag. [lol] Nah I just focused on helping him, and not on helping, you. [lol]
Quote:Original post by Anonymous Poster
In every case, remember that Centrino processor have less mhz but the same horsepower of higher mhz processor. Mhz aren't an accurate way to determine the real CPU power: at least, they are a way only inside a same family of processors. Just to be sure. :)
It also needs to be considered that a number of processors will not give you a constant clockrate. AMD for example advertises it's mobile speedstep type technology to be able to adjust CPU speed over 30 times a second in response to changing demands. Combined with CPU speed not mattering (Pentium M is an extreme example, but many of AMDs processors also run at a much lower clockrate while deliverying the same preformance) there just isn't any reason to measure CPU speed unless you are reporting it directly to the user. The commands used in the example source code are really meant to be used for profiling code on a development machine, not as an accurate timer for events.
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