Slavko Kocjancic pravi:
>
>
> 2010/3/31 Jeff Epler <[email protected]
> <mailto:[email protected]>>
>
> .time and .tmax (as well as the numbers in halcmd show thread) are in
> CPU cycles, not ns. Some versions of rtai performed very poorly when
> requesting the current time, so we switched to using the TSC. Is it
> possible that your system is 2GHz or so?
>
> If you saw a mention of .time and .tmax in the documentation,
> please let
> us know so that we can fix it.
>
> Jeff
>
>
> nx9005 laptop. Confused about speed. Somewhere is writen 2,4GHz and on
> other 1,8GHz. I wote for 1,8
>
> Is there a way to measure the speed of cpu and after that use to show
> time in nseconds? Or at least in window put text nnnnnn cycles.
>
> Slavko
I'm wrong... It's 2.12GHz I write simple FreeBasic program to check.
The .time and .tmax is in documentation and already says that time is in
cycles. So all that is my mistake as I didn't read manual carefuly enought.
'cpuspeed program
dim t as double
dim cyc1 as uLongInt
dim cyc2 as uLongInt
Function ReadRdtsc() As uLongInt
Asm
rdtsc
mov [Function], eax
mov [Function+4], edx
End Asm
End Function
print "(ESC for exit)"
do
t=timer
cyc1=ReadRdtsc()
do
loop until abs(timer-t)>1
cyc2=ReadRdtsc()
t=abs(timer-t)
cyc1=abs(cyc2-cyc1)
print "Cpu speed ";int((cyc1/t)/1000000);" MHz"
loop until inkey=chr(27)
------------------------------------------------------------------------------
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