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4fc55e3e46
o Split the compression across several worker threads. By default, "several" matches number of CPUs, capped at 24 for sanity when running on a very big hardwares. Provide option to set that number manually; o Fix bug inherited from the mkulzma (R.I.P) which degraded already slow LZMA compression even further by calling function to release compression state after processing each block. It is neither documented as required nor actually required by the LZMA library. This caused spree of system calls to release memory and then map it again for every block. LZMA compression is more than 2x faster after this change alone; o Record time it takes to do compression and report throughput achieved. o Add simple first-level 256 entry hash table for de-dup code, so it's not becoming a bottleneck at big files.
122 lines
3.4 KiB
C
122 lines
3.4 KiB
C
/*
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* Copyright (c) 2004-2016 Maxim Sobolev <sobomax@FreeBSD.org>
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* Copyright (c) 2011 Aleksandr Rybalko <ray@ddteam.net>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <err.h>
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#include <stdint.h>
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#include <lzma.h>
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#include "mkuzip.h"
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#include "mkuz_lzma.h"
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#include "mkuz_blk.h"
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#define USED_BLOCKSIZE DEV_BSIZE
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struct mkuz_lzma {
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lzma_filter filters[2];
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lzma_options_lzma opt_lzma;
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lzma_stream strm;
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uint32_t blksz;
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};
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static const lzma_stream lzma_stream_init = LZMA_STREAM_INIT;
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void *
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mkuz_lzma_init(uint32_t blksz)
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{
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struct mkuz_lzma *ulp;
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if (blksz % USED_BLOCKSIZE != 0) {
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errx(1, "cluster size should be multiple of %d",
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USED_BLOCKSIZE);
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/* Not reached */
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}
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if (blksz > MAXPHYS) {
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errx(1, "cluster size is too large");
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/* Not reached */
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}
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ulp = mkuz_safe_zmalloc(sizeof(struct mkuz_lzma));
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/* Init lzma encoder */
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ulp->strm = lzma_stream_init;
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if (lzma_lzma_preset(&ulp->opt_lzma, LZMA_PRESET_DEFAULT))
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errx(1, "Error loading LZMA preset");
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ulp->filters[0].id = LZMA_FILTER_LZMA2;
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ulp->filters[0].options = &ulp->opt_lzma;
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ulp->filters[1].id = LZMA_VLI_UNKNOWN;
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ulp->blksz = blksz;
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return (void *)ulp;
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}
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struct mkuz_blk *
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mkuz_lzma_compress(void *p, const struct mkuz_blk *iblk)
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{
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lzma_ret ret;
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struct mkuz_blk *rval;
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struct mkuz_lzma *ulp;
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ulp = (struct mkuz_lzma *)p;
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rval = mkuz_blk_ctor(ulp->blksz * 2);
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ret = lzma_stream_encoder(&ulp->strm, ulp->filters, LZMA_CHECK_CRC32);
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if (ret != LZMA_OK) {
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if (ret == LZMA_MEMLIMIT_ERROR)
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errx(1, "can't compress data: LZMA_MEMLIMIT_ERROR");
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errx(1, "can't compress data: LZMA compressor ERROR");
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}
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ulp->strm.next_in = iblk->data;
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ulp->strm.avail_in = ulp->blksz;
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ulp->strm.next_out = rval->data;
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ulp->strm.avail_out = rval->alen;
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ret = lzma_code(&ulp->strm, LZMA_FINISH);
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if (ret != LZMA_STREAM_END) {
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/* Error */
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errx(1, "lzma_code FINISH failed, code=%d, pos(in=%zd, "
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"out=%zd)", ret, (ulp->blksz - ulp->strm.avail_in),
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(ulp->blksz * 2 - ulp->strm.avail_out));
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}
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#if 0
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lzma_end(&ulp->strm);
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#endif
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rval->info.len = rval->alen - ulp->strm.avail_out;
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return (rval);
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}
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