processor frequency

666_1337 · 2003-03-09T03:55:42

hi everybody. i''m writing a game with thousands of things moving arround. since every object is isolated from from most of the other objects, i have to calculate the elapsed time for every unit. ... there''s now about one million gettimeofday calls per sec, and i thought i could speed things up using the 686-assembly rdtsc-command. ... asm("rdtsc\n" "mov %%edx, %0\n" "mov %%eax, 1+%0\n" :"=m"(_time) ; well... now i have the actual processor clocks stored in _time. and substracting the old amount of processor clocks gets me "delta clocks". now i would need to divide this value by the processor''s frequency. but where do i get it from (I of course know it, but i need to run this code on other machines)?

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Started by 666_1337 March 07, 2003 09:35 AM

9 comments, last by 666_1337 21 years, 1 month ago

666_1337

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March 09, 2003 03:54 AM

sorry for not having said you earlier, but i use gcc on linux. there is no stdafx.h. to compile the source you(tazMan)'ve written there i've needed to add

    #define BOOL int#define FALSE 0#define TRUE  1#define NULL  0#define __int64 long long

to the source, and i still have about one page of compiler error messages.

my original problem was, that time calling functions use to be inaccurate or inefficient on my machine. anyone knows an iso-c++ function to get the time? (getClock() gets me the time with a half second of precission. but i need it to be in at last 1/100 seconds).

[edited by - 666_1337 on March 9, 2003 4:55:14 AM] [/source]

[edited by - 666_1337 on March 9, 2003 4:55:42 AM]

our new version has many new and good features. sadly, the good ones are not new and the new ones are not good

processor frequency

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