Messages in this thread |  | | Date | Wed, 14 Feb 2007 14:17:19 +0100 | From | Johann Schuster <> | Subject | Measuring cpu time using getrusage |
| |
Hello,
currently i'm trying to measure the cpu times for numerical algorithms written in C using two calls of getrusage() and then calculating the time difference.
According to the man page of getrusage i looked at the user time of my process. Surprisingly the measured user times vary strongly depending on the system load of the machine. A heavy system load nearly doubles the measured time for my routine.
Does anyone know a better way to measure the used cpu cycles of a given process (or part of a program) or can anyone give me a hint if i missed some important fact.
Any help appreciated. Thank you in advance.
Johann Schuster - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
|  |