05dccc3551
git-svn-id: svn://svn.rockbox.org/rockbox/trunk@8375 a1c6a512-1295-4272-9138-f99709370657
80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
/***************************************************************************
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* __________ __ ___.
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* Open \______ \ ____ ____ | | _\_ |__ _______ ___
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* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
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* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
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* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
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* \/ \/ \/ \/ \/
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* $Id$
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*
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* Profiling routines counts ticks and calls to each profiled function.
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*
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* Copyright (C) 2005 by Brandon Low
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*
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* All files in this archive are subject to the GNU General Public License.
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* See the file COPYING in the source tree root for full license agreement.
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*
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* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
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* KIND, either express or implied.
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****************************************************************************/
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#ifndef _SYS_PROFILE_H
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#define _SYS_PROFILE_H 1
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#include <sys/types.h>
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/* PFD is Profiled Function Data */
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/* Indices are shorts which means that we use 4k of RAM */
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#define INDEX_BITS 11 /* What is a reasonable size for this? */
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#define INDEX_SIZE 2048 /* 2 ^ INDEX_BITS */
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#define INDEX_MASK 0x7FF /* lower INDEX_BITS 1 */
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/*
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* In the current setup (pfd has 4 longs and 2 shorts) this uses 20k of RAM
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* for profiling, and allows for profiling sections of code with up-to
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* 1024 function caller->callee pairs
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*/
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#define NUMPFDS 1024
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struct pfd_struct {
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void *self_pc;
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unsigned long count;
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unsigned long time;
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unsigned short link;
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struct pfd_struct *caller;
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};
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/* Possible states of profiling */
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#define PROF_ON 0x00
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#define PROF_BUSY 0x01
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#define PROF_ERROR 0x02
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#define PROF_OFF 0x03
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/* Masks for thread switches */
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#define PROF_OFF_THREAD 0x10
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#define PROF_ON_THREAD 0x0F
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extern int current_thread;
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/* Initialize and start profiling */
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void profstart(int current_thread)
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NO_PROF_ATTR;
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/* Clean up and write profile data */
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void profstop (void)
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NO_PROF_ATTR;
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/* Called every time a thread stops, we check if it's our thread and store
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* temporary timing data if it is */
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void profile_thread_stopped(int current_thread)
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NO_PROF_ATTR;
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/* Called when a thread starts, we check if it's our thread and resume timing */
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void profile_thread_started(int current_thread)
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NO_PROF_ATTR;
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void profile_func_exit(void *this_fn, void *call_site)
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NO_PROF_ATTR ICODE_ATTR;
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void profile_func_enter(void *this_fn, void *call_site)
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NO_PROF_ATTR ICODE_ATTR;
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#endif /*_SYS_PROFILE_H*/
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