155 lines
4.1 KiB
C++
155 lines
4.1 KiB
C++
/* ***** BEGIN LICENSE BLOCK *****
|
|
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
|
|
*
|
|
* The contents of this file are subject to the Mozilla Public License Version
|
|
* 1.1 (the "License"); you may not use this file except in compliance with
|
|
* the License. You may obtain a copy of the License at
|
|
* http://www.mozilla.org/MPL/
|
|
*
|
|
* Software distributed under the License is distributed on an "AS IS" basis,
|
|
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
|
|
* for the specific language governing rights and limitations under the
|
|
* License.
|
|
*
|
|
* The Original Code is [Open Source Virtual Machine.].
|
|
*
|
|
* The Initial Developer of the Original Code is
|
|
* Adobe System Incorporated.
|
|
* Portions created by the Initial Developer are Copyright (C) 2004-2006
|
|
* the Initial Developer. All Rights Reserved.
|
|
*
|
|
* Contributor(s):
|
|
* Adobe AS3 Team
|
|
*
|
|
* Alternatively, the contents of this file may be used under the terms of
|
|
* either the GNU General Public License Version 2 or later (the "GPL"), or
|
|
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
|
|
* in which case the provisions of the GPL or the LGPL are applicable instead
|
|
* of those above. If you wish to allow use of your version of this file only
|
|
* under the terms of either the GPL or the LGPL, and not to allow others to
|
|
* use your version of this file under the terms of the MPL, indicate your
|
|
* decision by deleting the provisions above and replace them with the notice
|
|
* and other provisions required by the GPL or the LGPL. If you do not delete
|
|
* the provisions above, a recipient may use your version of this file under
|
|
* the terms of any one of the MPL, the GPL or the LGPL.
|
|
*
|
|
* ***** END LICENSE BLOCK ***** */
|
|
|
|
#ifndef __avmplus_DynamicProfiler__
|
|
#define __avmplus_DynamicProfiler__
|
|
|
|
|
|
#ifdef AVMPLUS_PROFILE
|
|
namespace avmplus
|
|
{
|
|
class StackMark;
|
|
/**
|
|
* Provides dynamic profiling support for the AVM+.
|
|
*/
|
|
class DynamicProfiler
|
|
{
|
|
#ifdef WIN32
|
|
inline static int rdtsc() {
|
|
// read the cpu cycle counter. 1 tick = 1 cycle on IA32
|
|
_asm rdtsc;
|
|
}
|
|
#endif
|
|
|
|
int counts2[256];
|
|
int totalCount;
|
|
AbcOpcode lastOp;
|
|
uint64 times[256];
|
|
int lastTime;
|
|
|
|
/**
|
|
* 1. set markOverhead=0
|
|
* 2. run a test with -Ddprofile
|
|
* 3. set markOverhead slightly lower than the fastest opcode
|
|
* on Pentium-M, 65 is about right. cpu speed should not
|
|
* matter but it will vary between processor families.
|
|
* 4. rerun tests. overhead will be subtracted.
|
|
*/
|
|
static const int markOverhead = 61;
|
|
|
|
public:
|
|
DynamicProfiler();
|
|
|
|
/**
|
|
* When dprofile is set to true, the VM performs dynamic
|
|
* profiling. Every instruction is timed and the VM
|
|
* prints a report on exit detailing how many CPU cycles
|
|
* were spent in each instruction type. This shows
|
|
* the "instruction mix" of the executing code, and
|
|
* the performance characteristics of different
|
|
* bytecode instructions.
|
|
*/
|
|
bool dprofile;
|
|
|
|
/**
|
|
* When sprofile is set to true, the VM performs static
|
|
* profiling. The entire program's bytecode is scanned
|
|
* to determine how many instructions of each type
|
|
* are used in the program.
|
|
*/
|
|
bool sprofile;
|
|
|
|
/**
|
|
* Dumps the static and dynamic profiling reports to
|
|
* the specified console output stream.
|
|
*/
|
|
void dump(PrintWriter& console);
|
|
|
|
void endmark() { mark((AbcOpcode)0); }
|
|
|
|
void mark(AbcOpcode op)
|
|
{
|
|
#ifdef WIN32
|
|
int now = rdtsc();
|
|
#else
|
|
uint64 now = MMgc::GC::GetPerformanceCounter();
|
|
#endif
|
|
counts2[op]++;
|
|
totalCount++;
|
|
times[lastOp] += now-lastTime-markOverhead;
|
|
lastTime = now;
|
|
lastOp = op;
|
|
}
|
|
|
|
class StackMark;
|
|
friend class DynamicProfiler::StackMark;
|
|
|
|
class StackMark
|
|
{
|
|
AbcOpcode savedOp;
|
|
DynamicProfiler* dprof;
|
|
|
|
public:
|
|
StackMark(AbcOpcode op, DynamicProfiler* _dprof) : savedOp(OP_nop) // init to make GCC happy
|
|
{
|
|
if (_dprof->dprofile)
|
|
{
|
|
savedOp = _dprof->lastOp;
|
|
_dprof->mark(op);
|
|
this->dprof = _dprof;
|
|
}
|
|
else
|
|
{
|
|
this->dprof = NULL;
|
|
}
|
|
}
|
|
~StackMark()
|
|
{
|
|
if(dprof)
|
|
{
|
|
dprof->mark(savedOp);
|
|
dprof->totalCount--;
|
|
dprof->counts2[savedOp]--;
|
|
}
|
|
}
|
|
};
|
|
};
|
|
}
|
|
#endif
|
|
|
|
#endif /* __avmplus_DynamicProfiler__ */
|