829 lines
13 KiB
C++
829 lines
13 KiB
C++
/**
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* @file llstat.cpp
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*
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* $LicenseInfo:firstyear=2001&license=viewergpl$
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*
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* Copyright (c) 2001-2007, Linden Research, Inc.
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*
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* Second Life Viewer Source Code
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* The source code in this file ("Source Code") is provided by Linden Lab
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* to you under the terms of the GNU General Public License, version 2.0
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* ("GPL"), unless you have obtained a separate licensing agreement
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* ("Other License"), formally executed by you and Linden Lab. Terms of
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* the GPL can be found in doc/GPL-license.txt in this distribution, or
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* online at http://secondlife.com/developers/opensource/gplv2
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*
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* There are special exceptions to the terms and conditions of the GPL as
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* it is applied to this Source Code. View the full text of the exception
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* in the file doc/FLOSS-exception.txt in this software distribution, or
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* online at http://secondlife.com/developers/opensource/flossexception
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*
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* By copying, modifying or distributing this software, you acknowledge
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* that you have read and understood your obligations described above,
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* and agree to abide by those obligations.
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*
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* ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
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* WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
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* COMPLETENESS OR PERFORMANCE.
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* $/LicenseInfo$
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*/
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#include "linden_common.h"
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#include "llstat.h"
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#include "llframetimer.h"
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#include "timing.h"
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class LLStatAccum::impl
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{
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public:
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static const TimeScale IMPL_NUM_SCALES = (TimeScale)(SCALE_TWO_MINUTE + 1);
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static U64 sScaleTimes[IMPL_NUM_SCALES];
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BOOL mUseFrameTimer;
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BOOL mRunning;
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U64 mLastTime;
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struct Bucket
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{
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F64 accum;
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U64 endTime;
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BOOL lastValid;
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F64 lastAccum;
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};
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Bucket mBuckets[IMPL_NUM_SCALES];
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BOOL mLastSampleValid;
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F64 mLastSampleValue;
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impl(bool useFrameTimer);
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void reset(U64 when);
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void sum(F64 value);
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void sum(F64 value, U64 when);
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F32 meanValue(TimeScale scale) const;
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U64 getCurrentUsecs() const;
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// Get current microseconds based on timer type
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};
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U64 LLStatAccum::impl::sScaleTimes[IMPL_NUM_SCALES] =
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{
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USEC_PER_SEC / 10, // 100 millisec
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USEC_PER_SEC * 1, // seconds
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USEC_PER_SEC * 60, // minutes
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USEC_PER_SEC * 60 * 2 // two minutes
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#if ENABLE_LONG_TIME_STATS
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// enable these when more time scales are desired
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USEC_PER_SEC * 60*60, // hours
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USEC_PER_SEC * 24*60*60, // days
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USEC_PER_SEC * 7*24*60*60, // weeks
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#endif
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};
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LLStatAccum::impl::impl(bool useFrameTimer)
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{
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mUseFrameTimer = useFrameTimer;
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mRunning = FALSE;
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mLastSampleValid = FALSE;
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}
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void LLStatAccum::impl::reset(U64 when)
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{
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mRunning = TRUE;
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mLastTime = when;
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for (int i = 0; i < IMPL_NUM_SCALES; ++i)
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{
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mBuckets[i].accum = 0.0;
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mBuckets[i].endTime = when + sScaleTimes[i];
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mBuckets[i].lastValid = FALSE;
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}
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}
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void LLStatAccum::impl::sum(F64 value)
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{
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sum(value, getCurrentUsecs());
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}
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void LLStatAccum::impl::sum(F64 value, U64 when)
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{
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if (!mRunning)
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{
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reset(when);
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return;
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}
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if (when < mLastTime)
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{
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// This happens a LOT on some dual core systems.
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lldebugs << "LLStatAccum::sum clock has gone backwards from "
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<< mLastTime << " to " << when << ", resetting" << llendl;
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reset(when);
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return;
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}
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for (int i = 0; i < IMPL_NUM_SCALES; ++i)
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{
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Bucket& bucket = mBuckets[i];
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if (when < bucket.endTime)
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{
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bucket.accum += value;
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}
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else
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{
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U64 timeScale = sScaleTimes[i];
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U64 timeSpan = when - mLastTime;
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// how long is this value for
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U64 timeLeft = when - bucket.endTime;
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// how much time is left after filling this bucket
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if (timeLeft < timeScale)
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{
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F64 valueLeft = value * timeLeft / timeSpan;
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bucket.lastValid = TRUE;
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bucket.lastAccum = bucket.accum + (value - valueLeft);
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bucket.accum = valueLeft;
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bucket.endTime += timeScale;
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}
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else
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{
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U64 timeTail = timeLeft % timeScale;
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bucket.lastValid = TRUE;
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bucket.lastAccum = value * timeScale / timeSpan;
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bucket.accum = value * timeTail / timeSpan;
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bucket.endTime += (timeLeft - timeTail) + timeScale;
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}
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}
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}
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mLastTime = when;
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}
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F32 LLStatAccum::impl::meanValue(TimeScale scale) const
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{
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if (!mRunning)
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{
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return 0.0;
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}
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if (scale < 0 || scale >= IMPL_NUM_SCALES)
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{
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llwarns << "llStatAccum::meanValue called for unsupported scale: "
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<< scale << llendl;
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return 0.0;
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}
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const Bucket& bucket = mBuckets[scale];
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F64 value = bucket.accum;
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U64 timeLeft = bucket.endTime - mLastTime;
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U64 scaleTime = sScaleTimes[scale];
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if (bucket.lastValid)
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{
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value += bucket.lastAccum * timeLeft / scaleTime;
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}
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else if (timeLeft < scaleTime)
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{
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value *= scaleTime / (scaleTime - timeLeft);
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}
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else
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{
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value = 0.0;
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}
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return (F32)(value / scaleTime);
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}
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U64 LLStatAccum::impl::getCurrentUsecs() const
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{
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if (mUseFrameTimer)
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{
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return LLFrameTimer::getTotalTime();
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}
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else
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{
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return totalTime();
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}
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}
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LLStatAccum::LLStatAccum(bool useFrameTimer)
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: m(* new impl(useFrameTimer))
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{
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}
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LLStatAccum::~LLStatAccum()
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{
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delete &m;
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}
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F32 LLStatAccum::meanValue(TimeScale scale) const
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{
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return m.meanValue(scale);
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}
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LLStatMeasure::LLStatMeasure(bool use_frame_timer)
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: LLStatAccum(use_frame_timer)
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{
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}
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void LLStatMeasure::sample(F64 value)
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{
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U64 when = m.getCurrentUsecs();
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if (m.mLastSampleValid)
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{
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F64 avgValue = (value + m.mLastSampleValue) / 2.0;
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F64 interval = (F64)(when - m.mLastTime);
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m.sum(avgValue * interval, when);
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}
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else
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{
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m.reset(when);
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}
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m.mLastSampleValid = TRUE;
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m.mLastSampleValue = value;
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}
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LLStatRate::LLStatRate(bool use_frame_timer)
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: LLStatAccum(use_frame_timer)
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{
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}
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void LLStatRate::count(U32 value)
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{
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m.sum((F64)value * impl::sScaleTimes[SCALE_SECOND]);
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}
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LLStatTime::LLStatTime(bool use_frame_timer)
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: LLStatAccum(use_frame_timer)
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{
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}
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void LLStatTime::start()
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{
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m.sum(0.0);
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}
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void LLStatTime::stop()
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{
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U64 endTime = m.getCurrentUsecs();
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m.sum((F64)(endTime - m.mLastTime), endTime);
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}
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LLTimer LLStat::sTimer;
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LLFrameTimer LLStat::sFrameTimer;
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LLStat::LLStat(const U32 num_bins, const BOOL use_frame_timer)
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{
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llassert(num_bins > 0);
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U32 i;
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mUseFrameTimer = use_frame_timer;
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mNumValues = 0;
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mLastValue = 0.f;
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mLastTime = 0.f;
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mNumBins = num_bins;
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mCurBin = (mNumBins-1);
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mNextBin = 0;
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mBins = new F32[mNumBins];
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mBeginTime = new F64[mNumBins];
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mTime = new F64[mNumBins];
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mDT = new F32[mNumBins];
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for (i = 0; i < mNumBins; i++)
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{
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mBins[i] = 0.f;
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mBeginTime[i] = 0.0;
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mTime[i] = 0.0;
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mDT[i] = 0.f;
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}
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}
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LLStat::~LLStat()
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{
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delete[] mBins;
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delete[] mBeginTime;
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delete[] mTime;
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delete[] mDT;
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}
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void LLStat::reset()
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{
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U32 i;
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mNumValues = 0;
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mLastValue = 0.f;
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mCurBin = (mNumBins-1);
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delete[] mBins;
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delete[] mBeginTime;
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delete[] mTime;
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delete[] mDT;
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mBins = new F32[mNumBins];
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mBeginTime = new F64[mNumBins];
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mTime = new F64[mNumBins];
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mDT = new F32[mNumBins];
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for (i = 0; i < mNumBins; i++)
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{
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mBins[i] = 0.f;
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mBeginTime[i] = 0.0;
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mTime[i] = 0.0;
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mDT[i] = 0.f;
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}
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}
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void LLStat::setBeginTime(const F64 time)
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{
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mBeginTime[mNextBin] = time;
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}
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void LLStat::addValueTime(const F64 time, const F32 value)
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{
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if (mNumValues < mNumBins)
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{
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mNumValues++;
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}
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// Increment the bin counters.
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mCurBin++;
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if ((U32)mCurBin == mNumBins)
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{
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mCurBin = 0;
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}
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mNextBin++;
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if ((U32)mNextBin == mNumBins)
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{
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mNextBin = 0;
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}
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mBins[mCurBin] = value;
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mTime[mCurBin] = time;
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mDT[mCurBin] = (F32)(mTime[mCurBin] - mBeginTime[mCurBin]);
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//this value is used to prime the min/max calls
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mLastTime = mTime[mCurBin];
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mLastValue = value;
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// Set the begin time for the next stat segment.
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mBeginTime[mNextBin] = mTime[mCurBin];
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mTime[mNextBin] = mTime[mCurBin];
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mDT[mNextBin] = 0.f;
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}
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void LLStat::start()
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{
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if (mUseFrameTimer)
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{
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mBeginTime[mNextBin] = sFrameTimer.getElapsedSeconds();
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}
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else
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{
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mBeginTime[mNextBin] = sTimer.getElapsedTimeF64();
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}
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}
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void LLStat::addValue(const F32 value)
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{
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if (mNumValues < mNumBins)
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{
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mNumValues++;
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}
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// Increment the bin counters.
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mCurBin++;
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if ((U32)mCurBin == mNumBins)
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{
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mCurBin = 0;
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}
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mNextBin++;
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if ((U32)mNextBin == mNumBins)
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{
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mNextBin = 0;
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}
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mBins[mCurBin] = value;
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if (mUseFrameTimer)
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{
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mTime[mCurBin] = sFrameTimer.getElapsedSeconds();
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}
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else
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{
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mTime[mCurBin] = sTimer.getElapsedTimeF64();
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}
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mDT[mCurBin] = (F32)(mTime[mCurBin] - mBeginTime[mCurBin]);
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//this value is used to prime the min/max calls
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mLastTime = mTime[mCurBin];
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mLastValue = value;
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// Set the begin time for the next stat segment.
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mBeginTime[mNextBin] = mTime[mCurBin];
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mTime[mNextBin] = mTime[mCurBin];
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mDT[mNextBin] = 0.f;
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}
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F32 LLStat::getMax() const
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{
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U32 i;
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F32 current_max = mLastValue;
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if (mNumBins == 0)
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{
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current_max = 0.f;
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}
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else
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{
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for (i = 0; (i < mNumBins) && (i < mNumValues); i++)
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{
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// Skip the bin we're currently filling.
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if (i == (U32)mNextBin)
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{
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continue;
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}
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if (mBins[i] > current_max)
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{
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current_max = mBins[i];
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}
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}
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}
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return current_max;
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}
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F32 LLStat::getMean() const
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{
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U32 i;
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F32 current_mean = 0.f;
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U32 samples = 0;
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for (i = 0; (i < mNumBins) && (i < mNumValues); i++)
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{
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// Skip the bin we're currently filling.
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if (i == (U32)mNextBin)
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{
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continue;
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}
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current_mean += mBins[i];
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samples++;
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}
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// There will be a wrap error at 2^32. :)
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if (samples != 0)
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{
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current_mean /= samples;
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}
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else
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{
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current_mean = 0.f;
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}
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return current_mean;
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}
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F32 LLStat::getMin() const
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{
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U32 i;
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F32 current_min = mLastValue;
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if (mNumBins == 0)
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{
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current_min = 0.f;
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}
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else
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{
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for (i = 0; (i < mNumBins) && (i < mNumValues); i++)
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{
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// Skip the bin we're currently filling.
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if (i == (U32)mNextBin)
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{
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continue;
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}
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if (mBins[i] < current_min)
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{
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current_min = mBins[i];
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}
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}
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}
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return current_min;
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}
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F32 LLStat::getSum() const
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{
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U32 i;
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F32 sum = 0.f;
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for (i = 0; (i < mNumBins) && (i < mNumValues); i++)
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{
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// Skip the bin we're currently filling.
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if (i == (U32)mNextBin)
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{
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continue;
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}
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sum += mBins[i];
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}
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return sum;
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}
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F32 LLStat::getSumDuration() const
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{
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U32 i;
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F32 sum = 0.f;
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for (i = 0; (i < mNumBins) && (i < mNumValues); i++)
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{
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// Skip the bin we're currently filling.
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if (i == (U32)mNextBin)
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{
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continue;
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}
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sum += mDT[i];
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}
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return sum;
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}
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F32 LLStat::getPrev(S32 age) const
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{
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S32 bin;
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bin = mCurBin - age;
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while (bin < 0)
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{
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bin += mNumBins;
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}
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if (bin == mNextBin)
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{
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// Bogus for bin we're currently working on.
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return 0.f;
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}
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return mBins[bin];
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}
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F32 LLStat::getPrevPerSec(S32 age) const
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{
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S32 bin;
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bin = mCurBin - age;
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while (bin < 0)
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{
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bin += mNumBins;
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}
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if (bin == mNextBin)
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{
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// Bogus for bin we're currently working on.
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return 0.f;
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}
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return mBins[bin] / mDT[bin];
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}
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F64 LLStat::getPrevBeginTime(S32 age) const
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{
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S32 bin;
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bin = mCurBin - age;
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while (bin < 0)
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{
|
|
bin += mNumBins;
|
|
}
|
|
|
|
if (bin == mNextBin)
|
|
{
|
|
// Bogus for bin we're currently working on.
|
|
return 0.f;
|
|
}
|
|
|
|
return mBeginTime[bin];
|
|
}
|
|
|
|
F64 LLStat::getPrevTime(S32 age) const
|
|
{
|
|
S32 bin;
|
|
bin = mCurBin - age;
|
|
|
|
while (bin < 0)
|
|
{
|
|
bin += mNumBins;
|
|
}
|
|
|
|
if (bin == mNextBin)
|
|
{
|
|
// Bogus for bin we're currently working on.
|
|
return 0.f;
|
|
}
|
|
|
|
return mTime[bin];
|
|
}
|
|
|
|
F32 LLStat::getBin(S32 bin) const
|
|
{
|
|
return mBins[bin];
|
|
}
|
|
|
|
F32 LLStat::getBinPerSec(S32 bin) const
|
|
{
|
|
return mBins[bin] / mDT[bin];
|
|
}
|
|
|
|
F64 LLStat::getBinBeginTime(S32 bin) const
|
|
{
|
|
return mBeginTime[bin];
|
|
}
|
|
|
|
F64 LLStat::getBinTime(S32 bin) const
|
|
{
|
|
return mTime[bin];
|
|
}
|
|
|
|
F32 LLStat::getCurrent() const
|
|
{
|
|
return mBins[mCurBin];
|
|
}
|
|
|
|
F32 LLStat::getCurrentPerSec() const
|
|
{
|
|
return mBins[mCurBin] / mDT[mCurBin];
|
|
}
|
|
|
|
F64 LLStat::getCurrentBeginTime() const
|
|
{
|
|
return mBeginTime[mCurBin];
|
|
}
|
|
|
|
F64 LLStat::getCurrentTime() const
|
|
{
|
|
return mTime[mCurBin];
|
|
}
|
|
|
|
F32 LLStat::getCurrentDuration() const
|
|
{
|
|
return mDT[mCurBin];
|
|
}
|
|
|
|
F32 LLStat::getMeanPerSec() const
|
|
{
|
|
U32 i;
|
|
F32 value = 0.f;
|
|
F32 dt = 0.f;
|
|
|
|
for (i = 0; (i < mNumBins) && (i < mNumValues); i++)
|
|
{
|
|
// Skip the bin we're currently filling.
|
|
if (i == (U32)mNextBin)
|
|
{
|
|
continue;
|
|
}
|
|
value += mBins[i];
|
|
dt += mDT[i];
|
|
}
|
|
|
|
if (dt > 0.f)
|
|
{
|
|
return value/dt;
|
|
}
|
|
else
|
|
{
|
|
return 0.f;
|
|
}
|
|
}
|
|
|
|
F32 LLStat::getMeanDuration() const
|
|
{
|
|
F32 dur = 0.0f;
|
|
U32 count = 0;
|
|
for (U32 i=0; (i < mNumBins) && (i < mNumValues); i++)
|
|
{
|
|
if (i == (U32)mNextBin)
|
|
{
|
|
continue;
|
|
}
|
|
dur += mDT[i];
|
|
count++;
|
|
}
|
|
|
|
if (count > 0)
|
|
{
|
|
dur /= F32(count);
|
|
return dur;
|
|
}
|
|
else
|
|
{
|
|
return 0.f;
|
|
}
|
|
}
|
|
|
|
F32 LLStat::getMaxPerSec() const
|
|
{
|
|
U32 i;
|
|
F32 value;
|
|
|
|
if (mNextBin != 0)
|
|
{
|
|
value = mBins[0]/mDT[0];
|
|
}
|
|
else if (mNumValues > 0)
|
|
{
|
|
value = mBins[1]/mDT[1];
|
|
}
|
|
else
|
|
{
|
|
value = 0.f;
|
|
}
|
|
|
|
for (i = 0; (i < mNumBins) && (i < mNumValues); i++)
|
|
{
|
|
// Skip the bin we're currently filling.
|
|
if (i == (U32)mNextBin)
|
|
{
|
|
continue;
|
|
}
|
|
value = llmax(value, mBins[i]/mDT[i]);
|
|
}
|
|
return value;
|
|
}
|
|
|
|
F32 LLStat::getMinPerSec() const
|
|
{
|
|
U32 i;
|
|
F32 value;
|
|
|
|
if (mNextBin != 0)
|
|
{
|
|
value = mBins[0]/mDT[0];
|
|
}
|
|
else if (mNumValues > 0)
|
|
{
|
|
value = mBins[1]/mDT[1];
|
|
}
|
|
else
|
|
{
|
|
value = 0.f;
|
|
}
|
|
|
|
for (i = 0; (i < mNumBins) && (i < mNumValues); i++)
|
|
{
|
|
// Skip the bin we're currently filling.
|
|
if (i == (U32)mNextBin)
|
|
{
|
|
continue;
|
|
}
|
|
value = llmin(value, mBins[i]/mDT[i]);
|
|
}
|
|
return value;
|
|
}
|
|
|
|
F32 LLStat::getMinDuration() const
|
|
{
|
|
F32 dur = 0.0f;
|
|
for (U32 i=0; (i < mNumBins) && (i < mNumValues); i++)
|
|
{
|
|
dur = llmin(dur, mDT[i]);
|
|
}
|
|
return dur;
|
|
}
|
|
|
|
U32 LLStat::getNumValues() const
|
|
{
|
|
return mNumValues;
|
|
}
|
|
|
|
S32 LLStat::getNumBins() const
|
|
{
|
|
return mNumBins;
|
|
}
|
|
|
|
S32 LLStat::getCurBin() const
|
|
{
|
|
return mCurBin;
|
|
}
|
|
|
|
S32 LLStat::getNextBin() const
|
|
{
|
|
return mNextBin;
|
|
}
|
|
|
|
F64 LLStat::getLastTime() const
|
|
{
|
|
return mLastTime;
|
|
}
|