is there a tool in linux that acts on a standard kernel (WITHOUT having to enable profiling, etc which changes everything), which measures interrupt processing performance? In FreeBSD "top" measures interrupt usage, but LINUX shows 100% idle no matter how much the machine is routing. Dennis - : send the line "unsubscribe linux-net" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html