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adding some debug functions to observe statistics

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This commit is contained in:
Yann Collet 2018-05-18 14:09:42 -07:00
parent af3da079d1
commit a95e9e80d1
3 changed files with 53 additions and 26 deletions
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51
lib/compress/zstd_compress.c
View File

@ -1561,15 +1561,16 @@ void ZSTD_seqToCodes(const seqStore_t* seqStorePtr)
mlCodeTable[seqStorePtr->longLengthPos] = MaxML;
}
typedef enum {
ZSTD_defaultDisallowed = 0,
ZSTD_defaultAllowed = 1
} ZSTD_defaultPolicy_e;
MEM_STATIC
symbolEncodingType_e ZSTD_selectEncodingType(
FSE_repeat* repeatMode, size_t const mostFrequent, size_t nbSeq,
U32 defaultNormLog, ZSTD_defaultPolicy_e const isDefaultAllowed)
MEM_STATIC symbolEncodingType_e
ZSTD_selectEncodingType(
FSE_repeat* repeatMode, size_t const mostFrequent, size_t nbSeq,
U32 defaultNormLog, ZSTD_defaultPolicy_e const isDefaultAllowed)
{
#define MIN_SEQ_FOR_DYNAMIC_FSE 64
#define MAX_SEQ_FOR_STATIC_FSE 1000
@ -1605,17 +1606,17 @@ symbolEncodingType_e ZSTD_selectEncodingType(
return set_compressed;
}
MEM_STATIC
size_t ZSTD_buildCTable(void* dst, size_t dstCapacity,
FSE_CTable* nextCTable, U32 FSELog, symbolEncodingType_e type,
U32* count, U32 max,
BYTE const* codeTable, size_t nbSeq,
S16 const* defaultNorm, U32 defaultNormLog, U32 defaultMax,
FSE_CTable const* prevCTable, size_t prevCTableSize,
void* workspace, size_t workspaceSize)
MEM_STATIC size_t
ZSTD_buildCTable(void* dst, size_t dstCapacity,
FSE_CTable* nextCTable, U32 FSELog, symbolEncodingType_e type,
U32* count, U32 max,
const BYTE* codeTable, size_t nbSeq,
const S16* defaultNorm, U32 defaultNormLog, U32 defaultMax,
const FSE_CTable* prevCTable, size_t prevCTableSize,
void* workspace, size_t workspaceSize)
{
BYTE* op = (BYTE*)dst;
BYTE const* const oend = op + dstCapacity;
const BYTE* const oend = op + dstCapacity;
switch (type) {
case set_rle:
@ -1865,9 +1866,9 @@ MEM_STATIC size_t ZSTD_compressSequences_internal(seqStore_t* seqStorePtr,
nextEntropy->litlength_repeatMode = prevEntropy->litlength_repeatMode;
LLtype = ZSTD_selectEncodingType(&nextEntropy->litlength_repeatMode, mostFrequent, nbSeq, LL_defaultNormLog, ZSTD_defaultAllowed);
{ size_t const countSize = ZSTD_buildCTable(op, oend - op, CTable_LitLength, LLFSELog, (symbolEncodingType_e)LLtype,
count, max, llCodeTable, nbSeq, LL_defaultNorm, LL_defaultNormLog, MaxLL,
prevEntropy->litlengthCTable, sizeof(prevEntropy->litlengthCTable),
workspace, HUF_WORKSPACE_SIZE);
count, max, llCodeTable, nbSeq, LL_defaultNorm, LL_defaultNormLog, MaxLL,
prevEntropy->litlengthCTable, sizeof(prevEntropy->litlengthCTable),
workspace, HUF_WORKSPACE_SIZE);
if (ZSTD_isError(countSize)) return countSize;
op += countSize;
} }
@ -1880,9 +1881,9 @@ MEM_STATIC size_t ZSTD_compressSequences_internal(seqStore_t* seqStorePtr,
nextEntropy->offcode_repeatMode = prevEntropy->offcode_repeatMode;
Offtype = ZSTD_selectEncodingType(&nextEntropy->offcode_repeatMode, mostFrequent, nbSeq, OF_defaultNormLog, defaultPolicy);
{ size_t const countSize = ZSTD_buildCTable(op, oend - op, CTable_OffsetBits, OffFSELog, (symbolEncodingType_e)Offtype,
count, max, ofCodeTable, nbSeq, OF_defaultNorm, OF_defaultNormLog, DefaultMaxOff,
prevEntropy->offcodeCTable, sizeof(prevEntropy->offcodeCTable),
workspace, HUF_WORKSPACE_SIZE);
count, max, ofCodeTable, nbSeq, OF_defaultNorm, OF_defaultNormLog, DefaultMaxOff,
prevEntropy->offcodeCTable, sizeof(prevEntropy->offcodeCTable),
workspace, HUF_WORKSPACE_SIZE);
if (ZSTD_isError(countSize)) return countSize;
op += countSize;
} }
@ -1893,9 +1894,9 @@ MEM_STATIC size_t ZSTD_compressSequences_internal(seqStore_t* seqStorePtr,
nextEntropy->matchlength_repeatMode = prevEntropy->matchlength_repeatMode;
MLtype = ZSTD_selectEncodingType(&nextEntropy->matchlength_repeatMode, mostFrequent, nbSeq, ML_defaultNormLog, ZSTD_defaultAllowed);
{ size_t const countSize = ZSTD_buildCTable(op, oend - op, CTable_MatchLength, MLFSELog, (symbolEncodingType_e)MLtype,
count, max, mlCodeTable, nbSeq, ML_defaultNorm, ML_defaultNormLog, MaxML,
prevEntropy->matchlengthCTable, sizeof(prevEntropy->matchlengthCTable),
workspace, HUF_WORKSPACE_SIZE);
count, max, mlCodeTable, nbSeq, ML_defaultNorm, ML_defaultNormLog, MaxML,
prevEntropy->matchlengthCTable, sizeof(prevEntropy->matchlengthCTable),
workspace, HUF_WORKSPACE_SIZE);
if (ZSTD_isError(countSize)) return countSize;
op += countSize;
} }
@ -1917,9 +1918,9 @@ MEM_STATIC size_t ZSTD_compressSequences_internal(seqStore_t* seqStorePtr,
}
MEM_STATIC size_t ZSTD_compressSequences(seqStore_t* seqStorePtr,
ZSTD_entropyCTables_t const* prevEntropy,
const ZSTD_entropyCTables_t* prevEntropy,
ZSTD_entropyCTables_t* nextEntropy,
ZSTD_CCtx_params const* cctxParams,
const ZSTD_CCtx_params* cctxParams,
void* dst, size_t dstCapacity,
size_t srcSize, U32* workspace, int bmi2)
{
@ -1934,7 +1935,7 @@ MEM_STATIC size_t ZSTD_compressSequences(seqStore_t* seqStorePtr,
if (ZSTD_isError(cSize)) return cSize;
/* Check compressibility */
{ size_t const maxCSize = srcSize - ZSTD_minGain(srcSize); /* note : fixed formula, maybe should depend on compression level, or strategy */
{ size_t const maxCSize = srcSize - ZSTD_minGain(srcSize); /* note : fixed formula; to be refined, depending on compression level, or strategy */
if (cSize >= maxCSize) return 0; /* block not compressed */
}

27
lib/compress/zstd_compress_internal.h
View File

@ -633,6 +633,33 @@ MEM_STATIC U32 ZSTD_window_update(ZSTD_window_t* window,
return contiguous;
}
/* debug functions */
MEM_STATIC double ZSTD_fWeight(U32 rawStat)
{
U32 const fp_accuracy = 8;
U32 const fp_multiplier = (1 << fp_accuracy);
U32 const stat = rawStat + 1;
U32 const hb = ZSTD_highbit32(stat);
U32 const BWeight = hb * fp_multiplier;
U32 const FWeight = (stat << fp_accuracy) >> hb;
U32 const weight = BWeight + FWeight;
assert(hb + fp_accuracy < 31);
return (double)weight / fp_multiplier;
}
MEM_STATIC void ZSTD_debugTable(const U32* table, U32 max)
{
unsigned u, sum;
for (u=0, sum=0; u<=max; u++) sum += table[u];
DEBUGLOG(2, "total nb elts: %u", sum);
for (u=0; u<=max; u++) {
DEBUGLOG(2, "%2u: %5u (%.2f)",
u, table[u], ZSTD_fWeight(sum) - ZSTD_fWeight(table[u]) );
}
}
#if defined (__cplusplus)
}
#endif

1
lib/compress/zstd_opt.c
View File

@ -1057,7 +1057,6 @@ size_t ZSTD_compressBlock_btultra(
/* re-inforce weight of collected statistics */
ZSTD_upscaleStats(&ms->opt);
}
DEBUGLOG(5, "base=%p, src=%p, src-base=%zi", ms->window.base, src, (const BYTE*)src - (const BYTE*)ms->window.base);
return ZSTD_compressBlock_opt_generic(ms, seqStore, rep, cParams, src, srcSize, 2 /*optLevel*/, 0 /*extDict*/);
}