inga-lovinde
/
TrustPilotChallenge
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

Hash checking optimization

Browse Source
master
Inga 🏳‍🌈 8 years ago
parent b6afbe9528
commit bbc7761333
8 changed files with 62 additions and 53 deletions
Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL
Show Stats Download Patch File Download Diff File
  1. 12
      README.md
  2. 4
      dotnet/WhiteRabbit.UnmanagedBridge/WhiteRabbit.UnmanagedBridge.cpp
  3. 2
      dotnet/WhiteRabbit.UnmanagedBridge/WhiteRabbit.UnmanagedBridge.h
  4. 33
      dotnet/WhiteRabbit.UnmanagedBridge/md5.cpp
  5. 2
      dotnet/WhiteRabbit.UnmanagedBridge/md5.h
  6. 44
      dotnet/WhiteRabbit/PhraseSet.cs
  7. 10
      dotnet/WhiteRabbit/Program.cs
  8. 8
      dotnet/WhiteRabbit/StringsProcessor.cs

12
README.md
Unescape View File

@ -47,12 +47,12 @@ Number of words|Time to check all anagrams no longer than that|Time to solve "ea
---------------|----------------------------------------------|-------------------------|-----------------------------------|-------------------------|---------------------------------------------
3|0.04s||||4560
4|0.45s|||0.08s|7,431,984
5|10s|0.15s|0.06s|0.29s|1,347,437,484
6|5 minutes|0.9s|0.2s|2.3s|58,405,904,844
7|94 minutes|5.1s|0.7s|14.5s|1,070,307,744,114
8|16 hours|19s|2s|59s|10,893,594,396,594
9||49s|4.4s|2.7 minutes|70,596,864,409,954
10||89s|6.5s|5.2 minutes|314,972,701,475,754
5|9.6s|0.15s|0.06s|0.29s|1,347,437,484
6|4.5 minutes|0.85s|0.17s|2.05s|58,405,904,844
7|83 minutes|4.7s|0.6s|13.3s|1,070,307,744,114
8|14 hours|17.6s|1.8s|55s|10,893,594,396,594
9||45s|4s|2.5 minutes|70,596,864,409,954
10||80s|5.8s|4.8 minutes|314,972,701,475,754
Note that all measurements were done on a Release build; Debug build is significantly slower.

4
dotnet/WhiteRabbit.UnmanagedBridge/WhiteRabbit.UnmanagedBridge.cpp
Unescape View File

@ -6,10 +6,10 @@
#include "md5.h"
#include "phraseset.h"
void WhiteRabbitUnmanagedBridge::MD5Unmanaged::ComputeMD5(unsigned __int32 * input)
void WhiteRabbitUnmanagedBridge::MD5Unmanaged::ComputeMD5(unsigned __int32 * input, unsigned __int32 * expected)
{
#if AVX2
md5(input + 0 * 8 * 8);
md5(input + 0 * 8 * 8, expected);
#elif SIMD
md5(input + 0 * 8 * 4);
md5(input + 1 * 8 * 4);

2
dotnet/WhiteRabbit.UnmanagedBridge/WhiteRabbit.UnmanagedBridge.h
Unescape View File

@ -12,7 +12,7 @@ namespace WhiteRabbitUnmanagedBridge {
{
public:
literal int PhrasesPerSet = PHRASES_PER_SET;
static void ComputeMD5(unsigned int* input);
static void ComputeMD5(unsigned int* input, unsigned __int32 * expected);
static void FillPhraseSet(unsigned __int64* initialBufferPointer, unsigned __int64* bufferPointer, unsigned __int64* allWordsPointer, __int32* wordIndexes, unsigned __int64* permutationsPointer, int numberOfWords);
};
}

33
dotnet/WhiteRabbit.UnmanagedBridge/md5.cpp
Unescape View File

@ -81,23 +81,18 @@ _mm256_set_epi32( \
input[offset + 8 * 8]) \
)
#define WRITE_TO_OUTPUT(a, output) \
output[7 + 0 * 8] = a.m_V0.m256i_u32[0]; \
output[7 + 1 * 8] = a.m_V0.m256i_u32[1]; \
output[7 + 2 * 8] = a.m_V0.m256i_u32[2]; \
output[7 + 3 * 8] = a.m_V0.m256i_u32[3]; \
output[7 + 4 * 8] = a.m_V0.m256i_u32[4]; \
output[7 + 5 * 8] = a.m_V0.m256i_u32[5]; \
output[7 + 6 * 8] = a.m_V0.m256i_u32[6]; \
output[7 + 7 * 8] = a.m_V0.m256i_u32[7]; \
output[7 + 8 * 8] = a.m_V1.m256i_u32[0]; \
output[7 + 9 * 8] = a.m_V1.m256i_u32[1]; \
output[7 + 10 * 8] = a.m_V1.m256i_u32[2]; \
output[7 + 11 * 8] = a.m_V1.m256i_u32[3]; \
output[7 + 12 * 8] = a.m_V1.m256i_u32[4]; \
output[7 + 13 * 8] = a.m_V1.m256i_u32[5]; \
output[7 + 14 * 8] = a.m_V1.m256i_u32[6]; \
output[7 + 15 * 8] = a.m_V1.m256i_u32[7];
#define PERMUTE_MASK 85
#define WRITE_TO_OUTPUT(a, output, expected) \
output[0] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V0, 0 * PERMUTE_MASK))); \
output[1] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V0, 1 * PERMUTE_MASK))); \
output[2] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V0, 2 * PERMUTE_MASK))); \
output[3] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V0, 3 * PERMUTE_MASK))); \
output[4] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V1, 0 * PERMUTE_MASK))); \
output[5] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V1, 1 * PERMUTE_MASK))); \
output[6] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V1, 2 * PERMUTE_MASK))); \
output[7] = _mm256_movemask_epi8(_mm256_cmpeq_epi32(*expected, _mm256_permute4x64_epi64(a.m_V1, 3 * PERMUTE_MASK))); \
output[8] = _mm256_movemask_epi8(_mm256_or_si256(*((__m256i*)output), _mm256_slli_epi16(*((__m256i*)output), 4)));
#elif SIMD
@ -246,7 +241,7 @@ static const MD5Parameters Parameters = {
#define Step4(r, a, b, c, d, k, w) StepOuter(r, a, b, OP_ADD(I(c, b, d), OP_ADD(CREATE_VECTOR(k), OP_ADD(a, w))))
#define Step4E(r, a, b, c, d, k) StepOuter(r, a, b, OP_ADD(I(c, b, d), OP_ADD(CREATE_VECTOR(k), a)))
void md5(unsigned __int32 * input)
void md5(unsigned __int32 * input, unsigned __int32 * expected)
{
MD5Vector a = CREATE_VECTOR(Parameters.Init[0]);
MD5Vector b = CREATE_VECTOR(Parameters.Init[1]);
@ -329,6 +324,6 @@ void md5(unsigned __int32 * input)
a = OP_ADD(CREATE_VECTOR(Parameters.Init[0]), a);
WRITE_TO_OUTPUT(a, input);
WRITE_TO_OUTPUT(a, ((__int32*)input), ((__m256i*)expected));
}
#pragma managed

2
dotnet/WhiteRabbit.UnmanagedBridge/md5.h
Unescape View File

@ -1,3 +1,3 @@
#pragma once
void md5(unsigned int* input);
void md5(unsigned int* input, unsigned __int32 * expected);

44
dotnet/WhiteRabbit/PhraseSet.cs
Unescape View File

@ -31,7 +31,7 @@
}
}
public unsafe void ProcessPermutations(PhraseSet initialPhraseSet, Word[] allWords, int[] wordIndexes, ulong[] permutations, Vector<uint> expectedHashes, Action<byte[], uint> action)
public unsafe void ProcessPermutations(PhraseSet initialPhraseSet, Word[] allWords, int[] wordIndexes, ulong[] permutations, uint[] expectedHashesVector, Action<byte[], uint> action)
{
fixed (uint* bufferPointer = this.Buffer, initialBufferPointer = initialPhraseSet.Buffer)
{
@ -41,23 +41,39 @@
{
fixed (Word* allWordsPointer = allWords)
{
for (var i = 0; i < permutations.Length; i += Constants.PhrasesPerSet)
fixed (uint* expectedHashesPointer = expectedHashesVector)
{
MD5Unmanaged.FillPhraseSet(
(ulong*)initialBufferPointer,
(ulong*)bufferPointer,
(ulong*)allWordsPointer,
wordIndexesPointer,
permutationsPointer + i,
wordIndexes.Length);
for (var i = 0; i < permutations.Length; i += Constants.PhrasesPerSet)
{
MD5Unmanaged.FillPhraseSet(
(ulong*)initialBufferPointer,
(ulong*)bufferPointer,
(ulong*)allWordsPointer,
wordIndexesPointer,
permutationsPointer + i,
wordIndexes.Length);
MD5Unmanaged.ComputeMD5(bufferPointer);
MD5Unmanaged.ComputeMD5(bufferPointer, expectedHashesPointer);
for (var j = 0; j < Constants.PhrasesPerSet; j++)
{
if (Vector.EqualsAny(expectedHashes, new Vector<uint>(bufferPointer[j * 8 + 7])))
if (bufferPointer[Constants.PhrasesPerSet / 2] != 0)
{
action(this.GetBytes(j), bufferPointer[j * 8 + 7]);
for (var j = 0; j < Constants.PhrasesPerSet; j++)
{
var match = (bufferPointer[j / 2] >> (4 * (j % 2))) & 0xF0F0F0F;
if (match != 0)
{
var bufferInfo = ((ulong)bufferPointer[Constants.PhrasesPerSet] << 32) | bufferPointer[j];
MD5Unmanaged.FillPhraseSet(
(ulong*)initialBufferPointer,
(ulong*)bufferPointer,
(ulong*)allWordsPointer,
wordIndexesPointer,
permutationsPointer + i,
wordIndexes.Length);
action(this.GetBytes(j), match);
break;
}
}
}
}
}

10
dotnet/WhiteRabbit/Program.cs
Unescape View File

@ -50,17 +50,15 @@
Console.WriteLine("Only 64-bit systems are supported due to MD5Digest optimizations");
}
Vector<uint> expectedHashesFirstComponents;
var expectedHashesFirstComponentsArray = new uint[8];
{
var expectedHashesFirstComponentsArray = new uint[Vector<uint>.Count];
int i = 0;
foreach (var expectedHash in ConfigurationManager.AppSettings["ExpectedHashes"].Split(','))
{
expectedHashesFirstComponentsArray[i] = HexadecimalStringToUnsignedIntArray(expectedHash)[0];
i++;
expectedHashesFirstComponentsArray[i + 1] = HexadecimalStringToUnsignedIntArray(expectedHash)[0];
i += 2;
}
expectedHashesFirstComponents = new Vector<uint>(expectedHashesFirstComponentsArray);
}
var processor = new StringsProcessor(
@ -77,7 +75,7 @@
stopwatch.Restart();
processor.CheckPhrases(expectedHashesFirstComponents, (phraseBytes, hashFirstComponent) =>
processor.CheckPhrases(expectedHashesFirstComponentsArray, (phraseBytes, hashFirstComponent) =>
{
var phrase = Encoding.ASCII.GetString(phraseBytes);
var hash = ComputeFullMD5(phraseBytes);

8
dotnet/WhiteRabbit/StringsProcessor.cs
Unescape View File

@ -61,13 +61,13 @@
private int NumberOfCharacters { get; }
public void CheckPhrases(Vector<uint> expectedHashes, Action<byte[], uint> action)
public void CheckPhrases(uint[] expectedHashesVector, Action<byte[], uint> action)
{
// task of finding anagrams could be reduced to the task of finding sequences of dictionary vectors with the target sum
var sums = this.VectorsProcessor.GenerateSequences();
// converting sequences of vectors to the sequences of words...
Parallel.ForEach(sums, new ParallelOptions { MaxDegreeOfParallelism = Constants.NumberOfThreads }, sum => ProcessSum(sum, expectedHashes, action));
Parallel.ForEach(sums, new ParallelOptions { MaxDegreeOfParallelism = Constants.NumberOfThreads }, sum => ProcessSum(sum, expectedHashesVector, action));
}
public long GetPhrasesCount()
@ -119,7 +119,7 @@
return result;
}
private void ProcessSum(int[] sum, Vector<uint> expectedHashes, Action<byte[], uint> action)
private void ProcessSum(int[] sum, uint[] expectedHashesVector, Action<byte[], uint> action)
{
var initialPhraseSet = new PhraseSet();
initialPhraseSet.Init();
@ -135,7 +135,7 @@
this.AllWords,
wordsArray,
PrecomputedPermutationsGenerator.HamiltonianPermutations(wordsArray.Length, permutationsFilter),
expectedHashes,
expectedHashesVector,
action);
}
}

Write Preview
Loading…
Cancel
Save