This makes me want to run to Solaris. How disgustingly fragmented, mostly unusable piece of crap Linux performance and profiling tools are. As someone who has seem even top break due to kernel changes, seen perf segfault time to time and seen that the dtrace ports (or SystemTap for that matter) most of the times lock up/panic the system - Solaris (or any other modern UNIX variant like HP-UX) feel so much more reliable, cohesive and just a better overall experience in profiling and performance analysis departments.<p>Well at least perf works most of the time on Linux.