6a9d635998
This patch implement the hardware accelerator method in GZIP compression in ZFS. When the ZFS pool is enabled GZIP compression, the compression API will be automatically transferred to the hardware accelerator to free up CPU resource and speed up the compression time. * To enable Intel QAT hardware acceleration in ZOL you need to have QAT hardware and the driver installed: * QAT hardware DH8950: http://ark.intel.com/products/79483/Intel-QuickAssist-Adapter-8950 * QAT driver: https://01.org/intel-quickassist-technology * Start QAT driver in your system: service qat_service start * Enable QAT in ZFS, e.g.: ./configure --with-qat=<qat-driver-path>/QAT1.6 make * Set GZIP compression in ZFS dataset: zfs set compression = gzip <dataset> * Get QAT hardware statistics by: cat /proc/spl/kstat/zfs/qat * To disable QAT in ZFS: insmod zfs.ko zfs_qat_disable=1 Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov> Reviewed-by: Jinshan Xiong <jinshan.xiong@intel.com> Signed-off-by: Weigang Li <weigang.li@intel.com> Closes #5846
100 lines
2.4 KiB
C
100 lines
2.4 KiB
C
/*
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* CDDL HEADER START
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*
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* The contents of this file are subject to the terms of the
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* Common Development and Distribution License (the "License").
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* You may not use this file except in compliance with the License.
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*
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* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
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* or http://www.opensolaris.org/os/licensing.
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* See the License for the specific language governing permissions
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* and limitations under the License.
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*
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* When distributing Covered Code, include this CDDL HEADER in each
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* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
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* If applicable, add the following below this CDDL HEADER, with the
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* fields enclosed by brackets "[]" replaced with your own identifying
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* information: Portions Copyright [yyyy] [name of copyright owner]
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*
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* CDDL HEADER END
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*/
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/*
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* Copyright 2007 Sun Microsystems, Inc. All rights reserved.
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* Use is subject to license terms.
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*/
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#include <sys/debug.h>
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#include <sys/types.h>
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#include "qat_compress.h"
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#ifdef _KERNEL
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#include <sys/systm.h>
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#include <sys/zmod.h>
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typedef size_t zlen_t;
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#define compress_func z_compress_level
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#define uncompress_func z_uncompress
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#else /* _KERNEL */
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#include <strings.h>
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#include <zlib.h>
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typedef uLongf zlen_t;
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#define compress_func compress2
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#define uncompress_func uncompress
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#endif
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size_t
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gzip_compress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n)
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{
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zlen_t dstlen = d_len;
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ASSERT(d_len <= s_len);
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/* check if hardware accelerator can be used */
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if (qat_use_accel(s_len)) {
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if (qat_compress(QAT_COMPRESS, s_start,
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s_len, d_start, d_len, &dstlen) == CPA_STATUS_SUCCESS)
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return ((size_t)dstlen);
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/* if hardware compress fail, do it again with software */
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}
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if (compress_func(d_start, &dstlen, s_start, s_len, n) != Z_OK) {
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if (d_len != s_len)
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return (s_len);
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bcopy(s_start, d_start, s_len);
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return (s_len);
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}
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return ((size_t)dstlen);
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}
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/*ARGSUSED*/
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int
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gzip_decompress(void *s_start, void *d_start, size_t s_len, size_t d_len, int n)
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{
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zlen_t dstlen = d_len;
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ASSERT(d_len >= s_len);
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/* check if hardware accelerator can be used */
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if (qat_use_accel(d_len)) {
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if (qat_compress(QAT_DECOMPRESS, s_start, s_len,
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d_start, d_len, &dstlen) == CPA_STATUS_SUCCESS)
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return (0);
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/* if hardware de-compress fail, do it again with software */
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}
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if (uncompress_func(d_start, &dstlen, s_start, s_len) != Z_OK)
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return (-1);
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return (0);
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}
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