ReadClock question - Possible overflow?

; RDTSC.ASM Agner Fog
2003

; © 2003 GNU General Public License www.gnu.org/copyleft/gpl.html

PublicAlias _ReadClock ; Underscore needed when called from
Windows

push ebx
sub eax, eax
cpuid ; serialize
rdtsc ; read time stamp counter
push eax
push edx
sub eax, eax
cpuid ; serialize
pop edx
pop eax
pop ebx
ret
ReadClock ENDP

I was wondering when having ReadClock function to perform time
measurement. Is there any posibility that the time stamp counter will
overflow (i.e., edx:eax is alreay holding the maximum value, the next
clock cycle, it will reset to 0), hence giving inaccurate time
measurement result?

Thank you

yccheok

.

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