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clarified comments on LDM parameters

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This commit is contained in:
Yann Collet
2018-02-01 17:07:27 -08:00
parent 60fa90b6c0
commit 4b6a94f0cc
2 changed files with 23 additions and 20 deletions
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programs/fileio.c
+4 -5
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@@ -430,7 +430,7 @@ static cRess_t FIO_createCResources(const char* dictFileName, int cLevel,
if (!ress.srcBuffer || !ress.dstBuffer)
EXM_THROW(31, "allocation error : not enough memory");
/* Advances parameters, including dictionary */
/* Advanced parameters, including dictionary */
{ void* dictBuffer;
size_t const dictBuffSize = FIO_createDictBuffer(&dictBuffer, dictFileName); /* works with dictFileName==NULL */
if (dictFileName && (dictBuffer==NULL))
@@ -442,8 +442,7 @@ static cRess_t FIO_createCResources(const char* dictFileName, int cLevel,
/* compression level */
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_compressionLevel, cLevel) );
/* long distance matching */
CHECK( ZSTD_CCtx_setParameter(
ress.cctx, ZSTD_p_enableLongDistanceMatching, g_ldmFlag) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_enableLongDistanceMatching, g_ldmFlag) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_ldmHashLog, g_ldmHashLog) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_ldmMinMatch, g_ldmMinMatch) );
if (g_ldmBucketSizeLog != FIO_LDM_PARAM_NOTSET) {
@@ -461,13 +460,13 @@ static cRess_t FIO_createCResources(const char* dictFileName, int cLevel,
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_targetLength, comprParams->targetLength) );
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_compressionStrategy, (U32)comprParams->strategy) );
/* multi-threading */
#ifdef ZSTD_MULTITHREAD
DISPLAYLEVEL(5,"set nb threads = %u \n", g_nbThreads);
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_nbThreads, g_nbThreads) );
#ifdef ZSTD_MULTITHREAD
CHECK( ZSTD_CCtx_setParameter(ress.cctx, ZSTD_p_nonBlockingMode, 1) );
#endif
/* dictionary */
CHECK( ZSTD_CCtx_setPledgedSrcSize(ress.cctx, srcSize) ); /* just for dictionary loading, for compression parameters adaptation */
CHECK( ZSTD_CCtx_setPledgedSrcSize(ress.cctx, srcSize) ); /* set the value temporarily for dictionary loading, to adapt compression parameters */
CHECK( ZSTD_CCtx_loadDictionary(ress.cctx, dictBuffer, dictBuffSize) );
CHECK( ZSTD_CCtx_setPledgedSrcSize(ress.cctx, ZSTD_CONTENTSIZE_UNKNOWN) ); /* reset */