--- /dev/null
+// LzmaBench.cs
+
+using System;
+using System.IO;
+
+namespace SevenZip
+{
+ /// <summary>
+ /// LZMA Benchmark
+ /// </summary>
+ internal abstract class LzmaBench
+ {
+ const UInt32 kAdditionalSize = (6 << 20);
+ const UInt32 kCompressedAdditionalSize = (1 << 10);
+ const UInt32 kMaxLzmaPropSize = 10;
+
+ class CRandomGenerator
+ {
+ UInt32 A1;
+ UInt32 A2;
+ public CRandomGenerator() { Init(); }
+ public void Init() { A1 = 362436069; A2 = 521288629; }
+ public UInt32 GetRnd()
+ {
+ return
+ ((A1 = 36969 * (A1 & 0xffff) + (A1 >> 16)) << 16) ^
+ ((A2 = 18000 * (A2 & 0xffff) + (A2 >> 16)));
+ }
+ };
+
+ class CBitRandomGenerator
+ {
+ CRandomGenerator RG = new CRandomGenerator();
+ UInt32 Value;
+ int NumBits;
+ public void Init()
+ {
+ Value = 0;
+ NumBits = 0;
+ }
+ public UInt32 GetRnd(int numBits)
+ {
+ UInt32 result;
+ if (NumBits > numBits)
+ {
+ result = Value & (((UInt32)1 << numBits) - 1);
+ Value >>= numBits;
+ NumBits -= numBits;
+ return result;
+ }
+ numBits -= NumBits;
+ result = (Value << numBits);
+ Value = RG.GetRnd();
+ result |= Value & (((UInt32)1 << numBits) - 1);
+ Value >>= numBits;
+ NumBits = 32 - numBits;
+ return result;
+ }
+ };
+
+ class CBenchRandomGenerator
+ {
+ CBitRandomGenerator RG = new CBitRandomGenerator();
+ UInt32 Pos;
+ UInt32 Rep0;
+
+ public UInt32 BufferSize;
+ public Byte[] Buffer = null;
+
+ public CBenchRandomGenerator() { }
+
+ public void Set(UInt32 bufferSize)
+ {
+ Buffer = new Byte[bufferSize];
+ Pos = 0;
+ BufferSize = bufferSize;
+ }
+ UInt32 GetRndBit() { return RG.GetRnd(1); }
+ UInt32 GetLogRandBits(int numBits)
+ {
+ UInt32 len = RG.GetRnd(numBits);
+ return RG.GetRnd((int)len);
+ }
+ UInt32 GetOffset()
+ {
+ if (GetRndBit() == 0)
+ return GetLogRandBits(4);
+ return (GetLogRandBits(4) << 10) | RG.GetRnd(10);
+ }
+ UInt32 GetLen1() { return RG.GetRnd(1 + (int)RG.GetRnd(2)); }
+ UInt32 GetLen2() { return RG.GetRnd(2 + (int)RG.GetRnd(2)); }
+ public void Generate()
+ {
+ RG.Init();
+ Rep0 = 1;
+ while (Pos < BufferSize)
+ {
+ if (GetRndBit() == 0 || Pos < 1)
+ Buffer[Pos++] = (Byte)RG.GetRnd(8);
+ else
+ {
+ UInt32 len;
+ if (RG.GetRnd(3) == 0)
+ len = 1 + GetLen1();
+ else
+ {
+ do
+ Rep0 = GetOffset();
+ while (Rep0 >= Pos);
+ Rep0++;
+ len = 2 + GetLen2();
+ }
+ for (UInt32 i = 0; i < len && Pos < BufferSize; i++, Pos++)
+ Buffer[Pos] = Buffer[Pos - Rep0];
+ }
+ }
+ }
+ };
+
+ class CrcOutStream : System.IO.Stream
+ {
+ public CRC CRC = new CRC();
+ public void Init() { CRC.Init(); }
+ public UInt32 GetDigest() { return CRC.GetDigest(); }
+
+ public override bool CanRead { get { return false; } }
+ public override bool CanSeek { get { return false; } }
+ public override bool CanWrite { get { return true; } }
+ public override Int64 Length { get { return 0; } }
+ public override Int64 Position { get { return 0; } set { } }
+ public override void Flush() { }
+ public override long Seek(long offset, SeekOrigin origin) { return 0; }
+ public override void SetLength(long value) { }
+ public override int Read(byte[] buffer, int offset, int count) { return 0; }
+
+ public override void WriteByte(byte b)
+ {
+ CRC.UpdateByte(b);
+ }
+ public override void Write(byte[] buffer, int offset, int count)
+ {
+ CRC.Update(buffer, (uint)offset, (uint)count);
+ }
+ };
+
+ class CProgressInfo : ICodeProgress
+ {
+ public Int64 ApprovedStart;
+ public Int64 InSize;
+ public System.DateTime Time;
+ public void Init() { InSize = 0; }
+ public void SetProgress(Int64 inSize, Int64 outSize)
+ {
+ if (inSize >= ApprovedStart && InSize == 0)
+ {
+ Time = DateTime.UtcNow;
+ InSize = inSize;
+ }
+ }
+ }
+ const int kSubBits = 8;
+
+ static UInt32 GetLogSize(UInt32 size)
+ {
+ for (int i = kSubBits; i < 32; i++)
+ for (UInt32 j = 0; j < (1 << kSubBits); j++)
+ if (size <= (((UInt32)1) << i) + (j << (i - kSubBits)))
+ return (UInt32)(i << kSubBits) + j;
+ return (32 << kSubBits);
+ }
+
+ static UInt64 MyMultDiv64(UInt64 value, UInt64 elapsedTime)
+ {
+ UInt64 freq = TimeSpan.TicksPerSecond;
+ UInt64 elTime = elapsedTime;
+ while (freq > 1000000)
+ {
+ freq >>= 1;
+ elTime >>= 1;
+ }
+ if (elTime == 0)
+ elTime = 1;
+ return value * freq / elTime;
+ }
+
+ static UInt64 GetCompressRating(UInt32 dictionarySize, UInt64 elapsedTime, UInt64 size)
+ {
+ UInt64 t = GetLogSize(dictionarySize) - (18 << kSubBits);
+ UInt64 numCommandsForOne = 1060 + ((t * t * 10) >> (2 * kSubBits));
+ UInt64 numCommands = (UInt64)(size) * numCommandsForOne;
+ return MyMultDiv64(numCommands, elapsedTime);
+ }
+
+ static UInt64 GetDecompressRating(UInt64 elapsedTime, UInt64 outSize, UInt64 inSize)
+ {
+ UInt64 numCommands = inSize * 220 + outSize * 20;
+ return MyMultDiv64(numCommands, elapsedTime);
+ }
+
+ static UInt64 GetTotalRating(
+ UInt32 dictionarySize,
+ UInt64 elapsedTimeEn, UInt64 sizeEn,
+ UInt64 elapsedTimeDe,
+ UInt64 inSizeDe, UInt64 outSizeDe)
+ {
+ return (GetCompressRating(dictionarySize, elapsedTimeEn, sizeEn) +
+ GetDecompressRating(elapsedTimeDe, inSizeDe, outSizeDe)) / 2;
+ }
+
+ static void PrintValue(UInt64 v)
+ {
+ string s = v.ToString();
+ for (int i = 0; i + s.Length < 6; i++)
+ System.Console.Write(" ");
+ System.Console.Write(s);
+ }
+
+ static void PrintRating(UInt64 rating)
+ {
+ PrintValue(rating / 1000000);
+ System.Console.Write(" MIPS");
+ }
+
+ static void PrintResults(
+ UInt32 dictionarySize,
+ UInt64 elapsedTime,
+ UInt64 size,
+ bool decompressMode, UInt64 secondSize)
+ {
+ UInt64 speed = MyMultDiv64(size, elapsedTime);
+ PrintValue(speed / 1024);
+ System.Console.Write(" KB/s ");
+ UInt64 rating;
+ if (decompressMode)
+ rating = GetDecompressRating(elapsedTime, size, secondSize);
+ else
+ rating = GetCompressRating(dictionarySize, elapsedTime, size);
+ PrintRating(rating);
+ }
+
+ static public int LzmaBenchmark(Int32 numIterations, UInt32 dictionarySize)
+ {
+ if (numIterations <= 0)
+ return 0;
+ if (dictionarySize < (1 << 18))
+ {
+ System.Console.WriteLine("\nError: dictionary size for benchmark must be >= 19 (512 KB)");
+ return 1;
+ }
+ System.Console.Write("\n Compressing Decompressing\n\n");
+
+ Compression.LZMA.Encoder encoder = new Compression.LZMA.Encoder();
+ Compression.LZMA.Decoder decoder = new Compression.LZMA.Decoder();
+
+
+ CoderPropID[] propIDs =
+ {
+ CoderPropID.DictionarySize,
+ };
+ object[] properties =
+ {
+ (Int32)(dictionarySize),
+ };
+
+ UInt32 kBufferSize = dictionarySize + kAdditionalSize;
+ UInt32 kCompressedBufferSize = (kBufferSize / 2) + kCompressedAdditionalSize;
+
+ encoder.SetCoderProperties(propIDs, properties);
+ System.IO.MemoryStream propStream = new System.IO.MemoryStream();
+ encoder.WriteCoderProperties(propStream);
+ byte[] propArray = propStream.ToArray();
+
+ CBenchRandomGenerator rg = new CBenchRandomGenerator();
+
+ rg.Set(kBufferSize);
+ rg.Generate();
+ CRC crc = new CRC();
+ crc.Init();
+ crc.Update(rg.Buffer, 0, rg.BufferSize);
+
+ CProgressInfo progressInfo = new CProgressInfo();
+ progressInfo.ApprovedStart = dictionarySize;
+
+ UInt64 totalBenchSize = 0;
+ UInt64 totalEncodeTime = 0;
+ UInt64 totalDecodeTime = 0;
+ UInt64 totalCompressedSize = 0;
+
+ MemoryStream inStream = new MemoryStream(rg.Buffer, 0, (int)rg.BufferSize);
+ MemoryStream compressedStream = new MemoryStream((int)kCompressedBufferSize);
+ CrcOutStream crcOutStream = new CrcOutStream();
+ for (Int32 i = 0; i < numIterations; i++)
+ {
+ progressInfo.Init();
+ inStream.Seek(0, SeekOrigin.Begin);
+ compressedStream.Seek(0, SeekOrigin.Begin);
+ encoder.Code(inStream, compressedStream, -1, -1, progressInfo);
+ TimeSpan sp2 = DateTime.UtcNow - progressInfo.Time;
+ UInt64 encodeTime = (UInt64)sp2.Ticks;
+
+ long compressedSize = compressedStream.Position;
+ if (progressInfo.InSize == 0)
+ throw (new Exception("Internal ERROR 1282"));
+
+ UInt64 decodeTime = 0;
+ for (int j = 0; j < 2; j++)
+ {
+ compressedStream.Seek(0, SeekOrigin.Begin);
+ crcOutStream.Init();
+
+ decoder.SetDecoderProperties(propArray);
+ UInt64 outSize = kBufferSize;
+ System.DateTime startTime = DateTime.UtcNow;
+ decoder.Code(compressedStream, crcOutStream, 0, (Int64)outSize, null);
+ TimeSpan sp = (DateTime.UtcNow - startTime);
+ decodeTime = (ulong)sp.Ticks;
+ if (crcOutStream.GetDigest() != crc.GetDigest())
+ throw (new Exception("CRC Error"));
+ }
+ UInt64 benchSize = kBufferSize - (UInt64)progressInfo.InSize;
+ PrintResults(dictionarySize, encodeTime, benchSize, false, 0);
+ System.Console.Write(" ");
+ PrintResults(dictionarySize, decodeTime, kBufferSize, true, (ulong)compressedSize);
+ System.Console.WriteLine();
+
+ totalBenchSize += benchSize;
+ totalEncodeTime += encodeTime;
+ totalDecodeTime += decodeTime;
+ totalCompressedSize += (ulong)compressedSize;
+ }
+ System.Console.WriteLine("---------------------------------------------------");
+ PrintResults(dictionarySize, totalEncodeTime, totalBenchSize, false, 0);
+ System.Console.Write(" ");
+ PrintResults(dictionarySize, totalDecodeTime,
+ kBufferSize * (UInt64)numIterations, true, totalCompressedSize);
+ System.Console.WriteLine(" Average");
+ return 0;
+ }
+ }
+}
projects / physicsfs / blobdiff