Добавлена папка source в CristalDiskMark

2026-05-29 13:04:54 +07:00
commit bdc2295ee4
240 changed files with 94035 additions and 0 deletions
@@ -0,0 +1,228 @@
+/*
+
+DISKSPD
+
+Copyright(c) Microsoft Corporation
+All rights reserved.
+
+MIT License
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED *AS IS*, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.
+
+*/
+
+#include "IoBucketizer.h"
+#include <stdexcept>
+
+/*
+Calculating stddev using an online algorithm:
+avg = sum(1..n, a[n]) / n
+stddev = sqrt(sum(1..n, (a[n] - avg)^2) / n)
+       = sqrt(sum(1..n, a[n]^2 - 2 * a[n] * avg + avg^2) / n)
+       = sqrt((sum(1..n, a[n]^2) - 2 * avg * sum(1..n, a[n]) + n * avg^2) / n)
+       = sqrt((sum(1..n, a[n]^2) - 2 * (sum(1..n, a[n]) / n) * sum(1..n, a[n]) + n * (sum(1..n], a[n]) / n)^2) / n)
+       = sqrt((sum(1..n, a[n]^2) - (2 / n) * sum(1..n, a[n])^2 + (1 / n) * sum(1..n, a[n])^2) / n)
+       = sqrt((sum(1..n, a[n]^2) - (1 / n) * sum(1..n, a[n])^2) / n)
+
+So if we track n, sum(a[n]) and sum(a[n]^2) we can calculate the stddev.  This
+is used to calculate the stddev of the latencies below.
+*/
+
+const unsigned __int64 INVALID_BUCKET_DURATION = 0;
+
+IoBucketizer::IoBucketizer()
+    : _bucketDuration(INVALID_BUCKET_DURATION),
+      _validBuckets(0),
+      _totalBuckets(0)
+{}
+
+void IoBucketizer::Initialize(unsigned __int64 bucketDuration, size_t validBuckets)
+{
+    if (_bucketDuration != INVALID_BUCKET_DURATION)
+    {
+        throw std::runtime_error("IoBucketizer has already been initialized");
+    }
+    if (bucketDuration == INVALID_BUCKET_DURATION)
+    {
+        throw std::invalid_argument("Bucket duration must be a positive integer");
+    }
+
+    _bucketDuration = bucketDuration;
+    _validBuckets = validBuckets;
+    _vBuckets.resize(_validBuckets);
+}
+
+void IoBucketizer::Add(unsigned __int64 ioCompletionTime, double ioDuration)
+{
+    if (_bucketDuration == INVALID_BUCKET_DURATION)
+    {
+        throw std::runtime_error("IoBucketizer has not been initialized");
+    }
+
+    size_t bucketNumber = static_cast<size_t>(ioCompletionTime / _bucketDuration);
+    _totalBuckets = bucketNumber + 1;
+
+    if (bucketNumber >= _validBuckets)
+    {
+        return;
+    }
+    
+    _vBuckets[bucketNumber].lfSumDuration += ioDuration;
+    _vBuckets[bucketNumber].lfSumSqrDuration += ioDuration * ioDuration;
+
+    if (_vBuckets[bucketNumber].ulCount == 0 ||
+        ioDuration < _vBuckets[bucketNumber].lfMinDuration)
+    {
+        _vBuckets[bucketNumber].lfMinDuration = ioDuration;
+    }
+    if (_vBuckets[bucketNumber].ulCount == 0 ||
+        ioDuration > _vBuckets[bucketNumber].lfMaxDuration)
+    {
+        _vBuckets[bucketNumber].lfMaxDuration = ioDuration;
+    }
+
+    _vBuckets[bucketNumber].ulCount++;
+}
+
+size_t IoBucketizer::GetNumberOfValidBuckets() const 
+{
+    return (_totalBuckets > _validBuckets ? _validBuckets : _totalBuckets);
+}
+
+unsigned int IoBucketizer::GetIoBucketCount(size_t bucketNumber) const 
+{
+    if (bucketNumber < _validBuckets)
+    {
+        return _vBuckets[bucketNumber].ulCount;
+    }
+    
+    return 0;
+}
+
+double IoBucketizer::GetIoBucketMinDurationUsec(size_t bucketNumber) const
+{
+    if (bucketNumber < _validBuckets)
+    {
+        return _vBuckets[bucketNumber].lfMinDuration;
+    }
+    
+    return 0;
+}
+
+double IoBucketizer::GetIoBucketMaxDurationUsec(size_t bucketNumber) const
+{
+    if (bucketNumber < _validBuckets)
+    {
+        return _vBuckets[bucketNumber].lfMaxDuration;
+    }
+    
+    return 0;
+}
+
+double IoBucketizer::GetIoBucketAvgDurationUsec(size_t bucketNumber) const
+{
+    if (bucketNumber < _validBuckets && _vBuckets[bucketNumber].ulCount != 0)
+    {
+        return _vBuckets[bucketNumber].lfSumDuration / static_cast<double>(_vBuckets[bucketNumber].ulCount);
+    }
+
+    return 0;
+}
+
+double IoBucketizer::GetIoBucketDurationStdDevUsec(size_t bucketNumber) const
+{
+    if (bucketNumber < _validBuckets && _vBuckets[bucketNumber].ulCount != 0)
+    {
+        double sum_of_squares = _vBuckets[bucketNumber].lfSumSqrDuration;
+        double square_of_sum = _vBuckets[bucketNumber].lfSumDuration * _vBuckets[bucketNumber].lfSumDuration;
+        double count = static_cast<double>(_vBuckets[bucketNumber].ulCount);
+        double square_stddev = (sum_of_squares - (square_of_sum / count)) / count;
+        
+        return sqrt(square_stddev);
+    }
+
+    return 0;
+}
+
+double IoBucketizer::_GetMeanIOPS() const 
+{ 
+    size_t numBuckets = GetNumberOfValidBuckets();
+    double sum = 0;
+
+    for (size_t i = 0; i < numBuckets; i++)
+    {
+        sum += static_cast<double>(_vBuckets[i].ulCount) / numBuckets;
+    }
+
+    return sum;
+}
+
+double IoBucketizer::GetStandardDeviationIOPS() const
+{ 
+    size_t numBuckets = GetNumberOfValidBuckets();
+
+    if(numBuckets == 0) 
+    {
+        return 0.0;
+    }
+
+    double mean = _GetMeanIOPS();
+    double ssd = 0;
+
+    for (size_t i = 0; i < numBuckets; i++)
+    {
+        double dev = static_cast<double>(_vBuckets[i].ulCount) - mean;
+        double sqdev = dev*dev;
+        ssd += sqdev;
+    }
+
+    return sqrt(ssd / numBuckets);
+}
+
+void IoBucketizer::Merge(const IoBucketizer& other) 
+{
+    if(other._vBuckets.size() > _vBuckets.size())
+    {
+        _vBuckets.resize(other._vBuckets.size());
+    }
+    for(size_t i = 0; i < other._vBuckets.size(); i++) 
+    {
+        _vBuckets[i].ulCount += other._vBuckets[i].ulCount;
+        _vBuckets[i].lfSumDuration += other._vBuckets[i].lfSumDuration;
+        _vBuckets[i].lfSumSqrDuration += other._vBuckets[i].lfSumSqrDuration;
+        
+        if (i >= _validBuckets ||
+            other._vBuckets[i].lfMinDuration < _vBuckets[i].lfMinDuration)
+        {
+            _vBuckets[i].lfMinDuration = other._vBuckets[i].lfMinDuration;
+        }
+        if (other._vBuckets[i].lfMaxDuration > _vBuckets[i].lfMaxDuration)
+        {
+            _vBuckets[i].lfMaxDuration = other._vBuckets[i].lfMaxDuration;
+        }
+    }
+    if (other._validBuckets > _validBuckets)
+    {
+        _validBuckets = other._validBuckets;
+    }
+    if (other._totalBuckets > _totalBuckets)
+    {
+        _totalBuckets = other._totalBuckets;
+    }
+}