mirror of https://github.com/OpenTTD/OpenTTD.git
(svn r4125) - Feature: Add a general TIC() TOC() mechanism using rdtsc or something similar on non-i386 architectures to performance-tune (critical) code. Some systems are probably missing, but those can be added later.
This commit is contained in:
Darkvater
parent
4125aa21f8
commit
a91c52e169
1
Makefile
1
Makefile
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@ -670,6 +670,7 @@ SRCS += oldloader.c
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SRCS += openttd.c
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SRCS += order_cmd.c
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SRCS += order_gui.c
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SRCS += os_timer.c
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SRCS += pathfind.c
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SRCS += player_gui.c
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SRCS += players.c
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23
debug.h
23
debug.h
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@ -26,4 +26,27 @@ void CDECL debug(const char *s, ...);
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void SetDebugString(const char *s);
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const char *GetDebugString(void);
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/* MSVC of course has to have a different syntax for long long *sigh* */
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#ifdef _MSC_VER
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# define OTTD_PRINTF64 "I64"
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#else
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# define OTTD_PRINTF64 "ll"
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#endif
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// Used for profiling
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#define TIC() {\
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extern uint64 _rdtsc(void);\
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uint64 _xxx_ = _rdtsc();\
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static uint64 __sum__ = 0;\
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static uint32 __i__ = 0;
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#define TOC(str, count)\
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__sum__ += _rdtsc() - _xxx_;\
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if (++__i__ == count) {\
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printf("[%s]: %" OTTD_PRINTF64 "u [avg: %.1f]\n", str, __sum__, __sum__/(double)__i__);\
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__i__ = 0;\
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__sum__ = 0;\
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}\
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}
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#endif /* DEBUG_H */
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@ -116,12 +116,6 @@ static inline TileIndex RandomTile(void) { return TILE_MASK(Random()); }
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uint32 InteractiveRandom(void); /* Used for random sequences that are not the same on the other end of the multiplayer link */
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uint InteractiveRandomRange(uint max);
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// Used for profiling
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#define TIC() { extern uint32 _rdtsc(void); uint32 _xxx_ = _rdtsc(); static float __avg__;
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#define TOC(s) _xxx_ = _rdtsc() - _xxx_; __avg__=__avg__*0.99+_xxx_*0.01; printf("%s: %8d %f\n", s, _xxx_,__avg__); }
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void SetDate(uint date);
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/* facedraw.c */
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void DrawPlayerFace(uint32 face, int color, int x, int y);
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@ -339,6 +339,12 @@ SOURCE=.\ottdres.rc
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# End Source File
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# Begin Source File
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SOURCE=.\os_timer.c
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# End Source File
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# Begin Source File
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# Begin Source File
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SOURCE=.\pathfind.c
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# End Source File
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# Begin Source File
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@ -298,6 +298,9 @@
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<File
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RelativePath=".\ottdres.rc">
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</File>
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<File
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RelativePath=".\os_timer.c">
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</File>
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<File
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RelativePath=".\pathfind.c">
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</File>
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@ -0,0 +1,69 @@
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#include "stdafx.h"
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#undef RDTSC_AVAILABLE
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/* rdtsc for MSC_VER, uses simple inline assembly, or _rdtsc
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* from external win64.asm because VS2005 does not support inline assembly */
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#if defined(_MSC_VER) && !defined(RDTSC_AVAILABLE)
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# if defined (_M_AMD64)
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extern uint64 _rdtsc(void);
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# else
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uint64 _declspec(naked) _rdtsc(void)
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{
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_asm {
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rdtsc
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ret
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}
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}
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# endif
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# define RDTSC_AVAILABLE
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#endif
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/* rdtsc for OS/2. Hopefully this works, who knows */
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#if defined (__WATCOMC__) && !defined(RDTSC_AVAILABLE)
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unsigned __int64 _rdtsc( void);
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# pragma aux _rdtsc = 0x0F 0x31 value [edx eax] parm nomemory modify exact [edx eax] nomemory;
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# define RDTSC_AVAILABLE
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#endif
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/* rdtsc for all other *nix-en (hopefully). Use GCC syntax */
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#if defined(__i386__) || defined(__x86_64__) && !defined(RDTSC_AVAILABLE)
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uint64 _rdtsc(void)
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{
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uint32 high, low;
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__asm__ __volatile__ ("rdtsc" : "=a" (low), "=d" (high));
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return ((uint64)high << 32) | low;
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}
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# define RDTSC_AVAILABLE
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#endif
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/* rdtsc for PPC which has this not */
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#if defined(__POWERPC__) && !defined(RDTSC_AVAILABLE)
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uint64 _rdtsc(void)
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{
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uint32 high, low;
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uint32 high2 = 0;
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/* PPC does not have rdtsc, so we cheat by reading the two 32-bit time-counters
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* it has, 'Move From Time Base (Upper)'. Since these are two reads, in the
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* very unlikely event that the lower part overflows to the upper part while we
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* read it; we double-check and reread the registers */
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asm volatile (
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"mftbu %0\n"
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"mftb %1\n"
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"mftbu %2\n"
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"cmpw %3,%4\n"
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"bne- $-16\n"
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: "=r" (high), "=r" (low), "=r" (high2)
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: "0" (high), "2" (high2)
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);
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return ((uint64)high << 32) | low;
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}
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# define RDTSC_AVAILABLE
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#endif
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/* In all other cases we have no support for rdtsc. No major issue,
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* you just won't be able to profile your code with TIC()/TOC() */
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#if !defined(RDTSC_AVAILABLE)
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#warning "OS has no support for rdtsc()"
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uint64 _rdtsc(void) {return 0;}
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#endif
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30
train_cmd.c
30
train_cmd.c
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@ -2087,29 +2087,6 @@ static const byte _search_directions[6][4] = {
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};
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static const byte _pick_track_table[6] = {1, 3, 2, 2, 0, 0};
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#ifdef PF_BENCHMARK
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#if !defined(_MSC_VER)
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unsigned int _rdtsc()
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{
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unsigned int high, low;
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__asm__ __volatile__ ("rdtsc" : "=a" (low), "=d" (high));
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return low;
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}
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#else
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#ifndef _M_AMD64
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static unsigned int _declspec(naked) _rdtsc(void)
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{
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_asm {
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rdtsc
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ret
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}
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}
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#endif
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#endif
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#endif
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/* choose a track */
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static byte ChooseTrainTrack(Vehicle* v, TileIndex tile, DiagDirection enterdir, TrackdirBits trackdirbits)
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@ -2117,8 +2094,7 @@ static byte ChooseTrainTrack(Vehicle* v, TileIndex tile, DiagDirection enterdir,
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TrainTrackFollowerData fd;
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uint best_track;
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#ifdef PF_BENCHMARK
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int time = _rdtsc();
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static float f;
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TIC()
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#endif
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assert((trackdirbits & ~0x3F) == 0);
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@ -2171,9 +2147,7 @@ static byte ChooseTrainTrack(Vehicle* v, TileIndex tile, DiagDirection enterdir,
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}
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#ifdef PF_BENCHMARK
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time = _rdtsc() - time;
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f = f * 0.99 + 0.01 * time;
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printf("PF time = %d %f\n", time, f);
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TOC("PF time = ", 1)
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#endif
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return best_track;
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19
win32.c
19
win32.c
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@ -62,11 +62,6 @@ bool LoadLibraryList(Function proc[], const char* dll)
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}
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#ifdef _MSC_VER
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# ifdef _M_AMD64
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void* _get_save_esp(void);
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uint64 _rdtsc(void);
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# endif
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static const char *_exception_string;
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#endif
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@ -594,6 +589,7 @@ static LONG WINAPI ExceptionHandler(EXCEPTION_POINTERS *ep)
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static void Win32InitializeExceptions(void)
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{
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#ifdef _M_AMD64
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extern void *_get_save_esp(void);
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_safe_esp = _get_save_esp();
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#else
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_asm {
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@ -603,7 +599,7 @@ static void Win32InitializeExceptions(void)
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SetUnhandledExceptionFilter(ExceptionHandler);
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}
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#endif
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#endif /* _MSC_VER */
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static char *_fios_path;
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static char *_fios_save_path;
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@ -1057,17 +1053,6 @@ static int ParseCommandLine(char *line, char **argv, int max_argc)
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return n;
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}
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#if defined(_MSC_VER) && !defined(_M_AMD64)
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uint64 _declspec(naked) _rdtsc(void)
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{
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_asm {
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rdtsc
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ret
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}
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}
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#endif
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void CreateConsole(void)
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{
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HANDLE hand;
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