On Wed, 5 Dec 2001, Dan Kenigsberg wrote: > I admit this is slightly "Meaningless Numbers Calculus", but I have > to measure a certain computational task, and come up with a number > per architecture. I could use total process time, but dividing it > with the processor speed to acquire a measure of total cpu cycles > seems more appropriate.
as for process time, you can use getrusage() to get the total user time and system time. > Returning to my problem, I can use /proc/cpuinfo (in fact, I am). > However, on Sun/Alpha the best I can do is run psrinfo, but it is > problematic since those systems are in some cases assymetric - and I cannot tell > on which cpu my proccess is running. use inline asm to get cpu speed? i would think that all cpus have an instruction to get this information. you can look at the kernel's arch/ subdir to see how it's calculated for the different architectures. note that this is most likely a can of worms, unless you only need to support a limited subset of processors architectures. -- mulix http://www.pointer.co.il/~mulix/ http://syscalltrack.sf.net/ ================================================================= To unsubscribe, send mail to [EMAIL PROTECTED] with the word "unsubscribe" in the message body, e.g., run the command echo unsubscribe | mail [EMAIL PROTECTED]
