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/* -*- linux-c -*-
* Perf Header File
* Copyright (C) 2006-2014 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_H_
#define _PERF_H_
/** @file perf.h
* @brief Header file for performance monitoring hardware support
*/
struct stap_perf_probe {
struct perf_event_attr attr;
perf_overflow_handler_t callback;
const struct stap_probe * const probe;
union
{
/* per-cpu data. allocated with _stp_alloc_percpu() */
struct perf_event **events;
struct
{
/* per-task data. allocated by perf_event_create_kernel_counter */
struct perf_event *per_thread_event;
struct stap_task_finder_target tgt;
} t;
} e;
unsigned system_wide : 1;
unsigned task_finder : 1;
struct mutex cb_lock;
};
static long _stp_perf_init (struct stap_perf_probe *stp, struct task_struct* task);
static int _stp_perf_init_n (struct stap_perf_probe *probes, size_t n, const char **ppfail);
static void _stp_perf_del (struct stap_perf_probe *stp);
static void _stp_perf_del_n (struct stap_perf_probe *probes, size_t n);
#endif /* _PERF_H_ */
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