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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Profiling routines counts ticks and calls to each profiled function.
*
* Copyright (C) 2005 by Brandon Low
*
* All files in this archive are subject to the GNU General Public License.
* See the file COPYING in the source tree root for full license agreement.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
****************************************************************************/
#ifndef _SYS_PROFILE_H
#define _SYS_PROFILE_H 1
#include <sys/types.h>
/* PFD is Profiled Function Data */
/* Indices are shorts which means that we use 4k of RAM */
#define INDEX_BITS 11 /* What is a reasonable size for this? */
#define INDEX_SIZE 2048 /* 2 ^ INDEX_BITS */
#define INDEX_MASK 0x7FF /* lower INDEX_BITS 1 */
/*
* In the current setup (pfd has 4 longs and 2 shorts) this uses 20k of RAM
* for profiling, and allows for profiling sections of code with up-to
* 1024 function caller->callee pairs
*/
#define NUMPFDS 1024
struct pfd_struct {
void *self_pc;
unsigned long count;
unsigned long time;
unsigned short link;
struct pfd_struct *caller;
};
/* Possible states of profiling */
#define PROF_ON 0x00
#define PROF_BUSY 0x01
#define PROF_ERROR 0x02
#define PROF_OFF 0x03
/* Masks for thread switches */
#define PROF_OFF_THREAD 0x10
#define PROF_ON_THREAD 0x0F
/* Initialize and start profiling */
void profstart(int current_thread)
NO_PROF_ATTR;
/* Clean up and write profile data */
void profstop (void)
NO_PROF_ATTR;
/* Called every time a thread stops, we check if it's our thread and store
* temporary timing data if it is */
void profile_thread_stopped(int current_thread)
NO_PROF_ATTR;
/* Called when a thread starts, we check if it's our thread and resume timing */
void profile_thread_started(int current_thread)
NO_PROF_ATTR;
void profile_func_exit(void *this_fn, void *call_site)
NO_PROF_ATTR ICODE_ATTR;
void profile_func_enter(void *this_fn, void *call_site)
NO_PROF_ATTR ICODE_ATTR;
#endif /*_SYS_PROFILE_H*/
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