Hi All,
Can any one tell me how to measure time accurately for a block of C code in device drivers.
For example, If I want to measure the time duration of firmware download.
Most cpus have some way of getting at a counter or decrementer of various frequencies. Usually it requires low-level hardware knowledge and often it needs assembly code.
On ppc you'd use the mftbu/mftbl instructions, as suggested by Lee on x86 you'd use the rdtsc instruction.
Chris - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
