Current File : //usr/share/systemtap/runtime/linux/perf_read.h
/* -*- linux-c -*-
* Perf Read Header File
* Copyright (C) 2006-2013 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.
*/
#ifndef _PERF_READ_H_
#define _PERF_READ_H_
/** @file perf.h
* @brief Header file for performance monitoring hardware support
*/
#ifdef _HAVE_PERF_
// perf counter probes call _stp_perf_read
struct task_struct;
static int _stp_perf_read_init (unsigned i, struct task_struct* pid);
static long _stp_perf_read (int ncpu, unsigned i);
#else
// stapiu_target_reg references _stp_perf_read_init
// but will only call it for a perf counter probe
struct task_struct;
static int _stp_perf_read_init (unsigned i, struct task_struct* pid) {return 0;};
static long _stp_perf_read (int ncpu, unsigned i) {return 0;};
#endif
#endif /* _PERF_READ_H_ */
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