http://sourceware.org/systemtap/examples/subsystem-index.html Trace Time Spent in Read and Write for Files - http://sourceware.org/systemtap/examples/io/iotime.stp Trace Time Spent in nanosleep Syscalls - http://sourceware.org/systemtap/examples/process/sleeptime.stp System-Wide Count of Syscalls by PID - http://sourceware.org/systemtap/examples/process/syscalls_by_pid.stp System-Wide Count of Syscalls by Executable - http://sourceware.org/systemtap/examples/process/syscalls_by_proc.stp Trace Time Spent in wait4 Syscalls - http://sourceware.org/systemtap/examples/process/wait4time.stp