How to implement 1us delay in Linux?

[davyzhu]

Hello all,

The Linux's timer tick resolution is 1ms, and how to implement 1us delay in Linux, by hardware or by software?

DAVY

 

[arunragavan]

u can set by software also. but it is risk process.
u can try by software first

 

[papyaki]

Hi,

If you are working on an Intel Pentium class workstation, you can use the assembler instruction "rdtsc", which enables you to read a hardware counter running at cpu clock cycle speed.

You can write a assembler routine which reads this counter and loops until it reach a value corresponding to the delay you need.

See this pdf to see how to access this counter :

h**p://www.eecg.toronto.edu/~de/RDTSCPM1.pdf


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