Sub-millisecond precision timing in C or C++

Question

What techniques / methods exist for getting sub-millisecond precision timing data in C or C++, and what precision and accuracy do they provide? I\'m looking for methods tha

Answer 1

Most modern processors have registers for timing or other instrumentation purposes. On x86 since Pentium days there is the RDTSC instruction, for example. You compiler may give you access to this instruction.

See wikipedia for more info.