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Avoid calling compression routine when dedupe reduces data size to zero.

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This commit is contained in:
Moinak Ghosh 2013-08-28 09:46:10 +05:30
parent cee8d88ded
commit be1d0857a6
1 changed files with 5 additions and 2 deletions
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7
pcompress.c
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@ -1478,11 +1478,12 @@ plain_index:
o_chunksize = _chunksize; o_chunksize = _chunksize;
/* Compress data chunk. */ /* Compress data chunk. */
if (pctx->lzp_preprocess || pctx->enable_delta2_encode) { if ((pctx->lzp_preprocess || pctx->enable_delta2_encode) && _chunksize > 0) {
rv = preproc_compress(pctx, tdat->compress, tdat->uncompressed_chunk + dedupe_index_sz, rv = preproc_compress(pctx, tdat->compress, tdat->uncompressed_chunk + dedupe_index_sz,
_chunksize, compressed_chunk + index_size_cmp, &_chunksize, _chunksize, compressed_chunk + index_size_cmp, &_chunksize,
tdat->level, 0, tdat->data, tdat->props); tdat->level, 0, tdat->data, tdat->props);
} else {
} else if (_chunksize > 0) {
DEBUG_STAT_EN(double strt, en); DEBUG_STAT_EN(double strt, en);
DEBUG_STAT_EN(strt = get_wtime_millis()); DEBUG_STAT_EN(strt = get_wtime_millis());
@ -1491,6 +1492,8 @@ plain_index:
DEBUG_STAT_EN(en = get_wtime_millis()); DEBUG_STAT_EN(en = get_wtime_millis());
DEBUG_STAT_EN(fprintf(stderr, "Chunk compression speed %.3f MB/s\n", DEBUG_STAT_EN(fprintf(stderr, "Chunk compression speed %.3f MB/s\n",
get_mb_s(_chunksize, strt, en))); get_mb_s(_chunksize, strt, en)));
} else {
rv = -1;
} }
/* Can't compress data just retain as-is. */ /* Can't compress data just retain as-is. */