Edit File: timers.stp
// timers tapset // // Copyright (C) 2009 Red Hat Inc. // // This file is part of systemtap, and is free software. You can // redistribute it and/or modify it under the terms of the GNU General // Public License (GPL); either version 2, or (at your option) any // later version. // Most of the timer probes are defined in tapset-timers.cxx; // however, timer.profile needs to fall back to perf in certain // circumstances. /** * probe timer.profile - timer.profile.tick with a perf fallback on recent kernels * * This probe behaves identically to timer.profile.tick, except on * some recent kernels which lack the underlying profile timer * functionality. In those cases, timer.profile falls back to using * perf.sw.cpu_clock. */ probe timer.profile = timer.profile.tick ! , perf.sw.cpu_clock.sample(1000000) {} // This is used to pattern match for a .hz extension probe timer.profile.freq = perf.sw.cpu_clock {}