diff options
Diffstat (limited to 'indra/llcommon/llfasttimer.h')
| -rw-r--r-- | indra/llcommon/llfasttimer.h | 340 |
1 files changed, 86 insertions, 254 deletions
diff --git a/indra/llcommon/llfasttimer.h b/indra/llcommon/llfasttimer.h index f5c90291b8..48461df6ae 100644 --- a/indra/llcommon/llfasttimer.h +++ b/indra/llcommon/llfasttimer.h @@ -1,11 +1,11 @@ -/** +/** * @file llfasttimer.h - * @brief Declaration of a fast timer. + * @brief Inline implementations of fast timers. * * $LicenseInfo:firstyear=2004&license=viewergpl$ - * + * * Copyright (c) 2004-2009, Linden Research, Inc. - * + * * Second Life Viewer Source Code * The source code in this file ("Source Code") is provided by Linden Lab * to you under the terms of the GNU General Public License, version 2.0 @@ -13,17 +13,17 @@ * ("Other License"), formally executed by you and Linden Lab. Terms of * the GPL can be found in doc/GPL-license.txt in this distribution, or * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2 - * + * * There are special exceptions to the terms and conditions of the GPL as * it is applied to this Source Code. View the full text of the exception * in the file doc/FLOSS-exception.txt in this software distribution, or * online at * http://secondlifegrid.net/programs/open_source/licensing/flossexception - * + * * By copying, modifying or distributing this software, you acknowledge * that you have read and understood your obligations described above, * and agree to abide by those obligations. - * + * * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY, * COMPLETENESS OR PERFORMANCE. @@ -33,19 +33,43 @@ #ifndef LL_FASTTIMER_H #define LL_FASTTIMER_H -#include "llinstancetracker.h" - -#define FAST_TIMER_ON 1 -#define TIME_FAST_TIMERS 0 +// pull in the actual class definition +#include "llfasttimer_class.h" #if LL_WINDOWS +// +// Windows implementation of CPU clock +// + +// +// NOTE: put back in when we aren't using platform sdk anymore +// +// because MS has different signatures for these functions in winnt.h +// need to rename them to avoid conflicts +//#define _interlockedbittestandset _renamed_interlockedbittestandset +//#define _interlockedbittestandreset _renamed_interlockedbittestandreset +//#include <intrin.h> +//#undef _interlockedbittestandset +//#undef _interlockedbittestandreset + +//inline U32 LLFastTimer::getCPUClockCount32() +//{ +// U64 time_stamp = __rdtsc(); +// return (U32)(time_stamp >> 8); +//} +// +//// return full timer value, *not* shifted by 8 bits +//inline U64 LLFastTimer::getCPUClockCount64() +//{ +// return __rdtsc(); +//} // shift off lower 8 bits for lower resolution but longer term timing // on 1Ghz machine, a 32-bit word will hold ~1000 seconds of timing -inline U32 get_cpu_clock_count_32() +inline U32 LLFastTimer::getCPUClockCount32() { U32 ret_val; - __asm + __asm { _emit 0x0f _emit 0x31 @@ -58,10 +82,10 @@ inline U32 get_cpu_clock_count_32() } // return full timer value, *not* shifted by 8 bits -inline U64 get_cpu_clock_count_64() +inline U64 LLFastTimer::getCPUClockCount64() { U64 ret_val; - __asm + __asm { _emit 0x0f _emit 0x31 @@ -72,263 +96,71 @@ inline U64 get_cpu_clock_count_64() } return ret_val; } +#endif + + +#if LL_LINUX || LL_SOLARIS +// +// Linux and Solaris implementation of CPU clock - all architectures. +// +// Try to use the MONOTONIC clock if available, this is a constant time counter +// with nanosecond resolution (but not necessarily accuracy) and attempts are made +// to synchronize this value between cores at kernel start. It should not be affected +// by CPU frequency. If not available use the REALTIME clock, but this may be affected by +// NTP adjustments or other user activity affecting the system time. +inline U64 LLFastTimer::getCPUClockCount64() +{ + struct timespec tp; + +#ifdef CLOCK_MONOTONIC // MONOTONIC supported at build-time? + if (-1 == clock_gettime(CLOCK_MONOTONIC,&tp)) // if MONOTONIC isn't supported at runtime then ouch, try REALTIME +#endif + clock_gettime(CLOCK_REALTIME,&tp); + + return (tp.tv_sec*LLFastTimer::sClockResolution)+tp.tv_nsec; +} + +inline U32 LLFastTimer::getCPUClockCount32() +{ + return (U32)(LLFastTimer::getCPUClockCount64() >> 8); +} +#endif // (LL_LINUX || LL_SOLARIS)) -#endif // LL_WINDOWS -#if (LL_LINUX || LL_SOLARIS || LL_DARWIN) && (defined(__i386__) || defined(__amd64__)) -inline U32 get_cpu_clock_count_32() -{ - U64 x; - __asm__ volatile (".byte 0x0f, 0x31": "=A"(x)); - return (U32)x >> 8; +#if (LL_DARWIN) && (defined(__i386__) || defined(__amd64__)) +// +// Mac x86 implementation of CPU clock +inline U32 LLFastTimer::getCPUClockCount32() +{ + U64 x; + __asm__ volatile (".byte 0x0f, 0x31": "=A"(x)); + return (U32)(x >> 8); } -inline U32 get_cpu_clock_count_64() -{ +inline U64 LLFastTimer::getCPUClockCount64() +{ U64 x; __asm__ volatile (".byte 0x0f, 0x31": "=A"(x)); - return x >> 8; + return x; } #endif -#if ( LL_DARWIN && !(defined(__i386__) || defined(__amd64__))) || (LL_SOLARIS && defined(__sparc__)) + +#if ( LL_DARWIN && !(defined(__i386__) || defined(__amd64__))) // -// Mac PPC (deprecated) & Solaris SPARC implementation of CPU clock +// Mac PPC (deprecated) implementation of CPU clock // // Just use gettimeofday implementation for now -inline U32 get_cpu_clock_count_32() +inline U32 LLFastTimer::getCPUClockCount32() { - return (U32)get_clock_count(); + return (U32)(get_clock_count()>>8); } -inline U32 get_cpu_clock_count_64() -{ +inline U64 LLFastTimer::getCPUClockCount64() +{ return get_clock_count(); } #endif -class LLMutex; - -#include <queue> -#include "llsd.h" - - -class LL_COMMON_API LLFastTimer -{ -public: - // stores a "named" timer instance to be reused via multiple LLFastTimer stack instances - class LL_COMMON_API NamedTimer - : public LLInstanceTracker<NamedTimer> - { - friend class DeclareTimer; - public: - ~NamedTimer(); - - enum { HISTORY_NUM = 60 }; - - const std::string& getName() const { return mName; } - NamedTimer* getParent() const { return mParent; } - void setParent(NamedTimer* parent); - S32 getDepth(); - std::string getToolTip(S32 history_index = -1); - - typedef std::vector<NamedTimer*>::const_iterator child_const_iter; - child_const_iter beginChildren(); - child_const_iter endChildren(); - std::vector<NamedTimer*>& getChildren(); - - void setCollapsed(bool collapsed) { mCollapsed = collapsed; } - bool getCollapsed() const { return mCollapsed; } - - U32 getCountAverage() const { return mCountAverage; } - U32 getCallAverage() const { return mCallAverage; } - - U32 getHistoricalCount(S32 history_index = 0) const; - U32 getHistoricalCalls(S32 history_index = 0) const; - - static NamedTimer& getRootNamedTimer(); - - struct FrameState - { - FrameState(NamedTimer* timerp); - - U32 mSelfTimeCounter; - U32 mCalls; - FrameState* mParent; // info for caller timer - FrameState* mLastCaller; // used to bootstrap tree construction - NamedTimer* mTimer; - U16 mActiveCount; // number of timers with this ID active on stack - bool mMoveUpTree; // needs to be moved up the tree of timers at the end of frame - }; - - S32 getFrameStateIndex() const { return mFrameStateIndex; } - - FrameState& getFrameState() const; - - - private: - friend class LLFastTimer; - friend class NamedTimerFactory; - - // - // methods - // - NamedTimer(const std::string& name); - // recursive call to gather total time from children - static void accumulateTimings(); - - // updates cumulative times and hierarchy, - // can be called multiple times in a frame, at any point - static void processTimes(); - - static void buildHierarchy(); - static void resetFrame(); - static void reset(); - - - // - // members - // - S32 mFrameStateIndex; - - std::string mName; - - U32 mTotalTimeCounter; - - U32 mCountAverage; - U32 mCallAverage; - - U32* mCountHistory; - U32* mCallHistory; - - // tree structure - NamedTimer* mParent; // NamedTimer of caller(parent) - std::vector<NamedTimer*> mChildren; - bool mCollapsed; // don't show children - bool mNeedsSorting; // sort children whenever child added - - }; - - // used to statically declare a new named timer - class LL_COMMON_API DeclareTimer - : public LLInstanceTracker<DeclareTimer> - { - public: - DeclareTimer(const std::string& name, bool open); - DeclareTimer(const std::string& name); - - static void updateCachedPointers(); - - // convertable to NamedTimer::FrameState for convenient usage of LLFastTimer(declared_timer) - operator NamedTimer::FrameState&() { return *mFrameState; } - private: - NamedTimer& mTimer; - NamedTimer::FrameState* mFrameState; - }; - - -public: - static LLMutex* sLogLock; - static std::queue<LLSD> sLogQueue; - static BOOL sLog; - static BOOL sMetricLog; - - typedef std::vector<NamedTimer::FrameState> info_list_t; - static info_list_t& getFrameStateList(); - - enum RootTimerMarker { ROOT }; - LLFastTimer(RootTimerMarker); - - LLFastTimer(NamedTimer::FrameState& timer) - : mFrameState(&timer) - { -#if TIME_FAST_TIMERS - U64 timer_start = get_cpu_clock_count_64(); -#endif -#if FAST_TIMER_ON - NamedTimer::FrameState* frame_state = &timer; - U32 cur_time = get_cpu_clock_count_32(); - mStartSelfTime = cur_time; - mStartTotalTime = cur_time; - - frame_state->mActiveCount++; - frame_state->mCalls++; - // keep current parent as long as it is active when we are - frame_state->mMoveUpTree |= (frame_state->mParent->mActiveCount == 0); - - mLastTimer = sCurTimer; - sCurTimer = this; -#endif -#if TIME_FAST_TIMERS - U64 timer_end = get_cpu_clock_count_64(); - sTimerCycles += timer_end - timer_start; -#endif - } - - ~LLFastTimer() - { -#if TIME_FAST_TIMERS - U64 timer_start = get_cpu_clock_count_64(); -#endif -#if FAST_TIMER_ON - NamedTimer::FrameState* frame_state = mFrameState; - U32 cur_time = get_cpu_clock_count_32(); - frame_state->mSelfTimeCounter += cur_time - mStartSelfTime; - - frame_state->mActiveCount--; - LLFastTimer* last_timer = mLastTimer; - sCurTimer = last_timer; - - // store last caller to bootstrap tree creation - frame_state->mLastCaller = last_timer->mFrameState; - - // we are only tracking self time, so subtract our total time delta from parents - U32 total_time = cur_time - mStartTotalTime; - last_timer->mStartSelfTime += total_time; -#endif -#if TIME_FAST_TIMERS - U64 timer_end = get_cpu_clock_count_64(); - sTimerCycles += timer_end - timer_start; - sTimerCalls++; -#endif - } - - - // call this once a frame to reset timers - static void nextFrame(); - - // dumps current cumulative frame stats to log - // call nextFrame() to reset timers - static void dumpCurTimes(); - - // call this to reset timer hierarchy, averages, etc. - static void reset(); - - static U64 countsPerSecond(); - static S32 getLastFrameIndex() { return sLastFrameIndex; } - static S32 getCurFrameIndex() { return sCurFrameIndex; } - - static void writeLog(std::ostream& os); - static const NamedTimer* getTimerByName(const std::string& name); - -public: - static bool sPauseHistory; - static bool sResetHistory; - static U64 sTimerCycles; - static U32 sTimerCalls; - -private: - static LLFastTimer* sCurTimer; - static S32 sCurFrameIndex; - static S32 sLastFrameIndex; - static U64 sLastFrameTime; - static info_list_t* sTimerInfos; - - U32 mStartSelfTime; // start time + time of all child timers - U32 mStartTotalTime; // start time + time of all child timers - NamedTimer::FrameState* mFrameState; - LLFastTimer* mLastTimer; -}; - #endif // LL_LLFASTTIMER_H |