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a couple performance improvement changes for ldm

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This commit is contained in:
Quentin Carbonneaux
2021-01-20 00:54:20 -08:00
parent 7e6729055a
commit 1e65711ca5
4 changed files with 43 additions and 44 deletions
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lib/compress/zstdmt_compress.c
+3 -3
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@@ -486,10 +486,10 @@ ZSTDMT_serialState_reset(serialState_t* serialState,
size_t const hashSize = ((size_t)1 << hashLog) * sizeof(ldmEntry_t);
unsigned const bucketLog =
params.ldmParams.hashLog - params.ldmParams.bucketSizeLog;
size_t const bucketSize = (size_t)1 << bucketLog;
unsigned const prevBucketLog =
serialState->params.ldmParams.hashLog -
serialState->params.ldmParams.bucketSizeLog;
size_t const numBuckets = (size_t)1 << bucketLog;
/* Size the seq pool tables */
ZSTDMT_setNbSeq(seqPool, ZSTD_ldm_getMaxNbSeq(params.ldmParams, jobSize));
/* Reset the window */
@@ -501,13 +501,13 @@ ZSTDMT_serialState_reset(serialState_t* serialState,
}
if (serialState->ldmState.bucketOffsets == NULL || prevBucketLog < bucketLog) {
ZSTD_customFree(serialState->ldmState.bucketOffsets, cMem);
serialState->ldmState.bucketOffsets = (BYTE*)ZSTD_customMalloc(bucketSize, cMem);
serialState->ldmState.bucketOffsets = (BYTE*)ZSTD_customMalloc(numBuckets, cMem);
}
if (!serialState->ldmState.hashTable || !serialState->ldmState.bucketOffsets)
return 1;
/* Zero the tables */
ZSTD_memset(serialState->ldmState.hashTable, 0, hashSize);
ZSTD_memset(serialState->ldmState.bucketOffsets, 0, bucketSize);
ZSTD_memset(serialState->ldmState.bucketOffsets, 0, numBuckets);
/* Update window state and fill hash table with dict */
serialState->ldmState.loadedDictEnd = 0;