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Filename : timers.stp
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// 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 {}