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ab9f4b0b82
This is a new implementation of RAIDZ1/2/3 routines using x86_64
scalar, SSE, and AVX2 instruction sets. Included are 3 parity
generation routines (P, PQ, and PQR) and 7 reconstruction routines,
for all RAIDZ level. On module load, a quick benchmark of supported
routines will select the fastest for each operation and they will
be used at runtime. Original implementation is still present and
can be selected via module parameter.
Patch contains:
- specialized gen/rec routines for all RAIDZ levels,
- new scalar raidz implementation (unrolled),
- two x86_64 SIMD implementations (SSE and AVX2 instructions sets),
- fastest routines selected on module load (benchmark).
- cmd/raidz_test - verify and benchmark all implementations
- added raidz_test to the ZFS Test Suite
New zfs module parameters:
- zfs_vdev_raidz_impl (str): selects the implementation to use. On
module load, the parameter will only accept first 3 options, and
the other implementations can be set once module is finished
loading. Possible values for this option are:
"fastest" - use the fastest math available
"original" - use the original raidz code
"scalar" - new scalar impl
"sse" - new SSE impl if available
"avx2" - new AVX2 impl if available
See contents of `/sys/module/zfs/parameters/zfs_vdev_raidz_impl` to
get the list of supported values. If an implementation is not supported
on the system, it will not be shown. Currently selected option is
enclosed in `[]`.
Signed-off-by: Gvozden Neskovic <neskovic@gmail.com>
Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov>
Closes #4328
107 lines
2.2 KiB
C
107 lines
2.2 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 (C) 2016 Gvozden Nešković. All rights reserved.
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*/
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#ifndef RAIDZ_TEST_H
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#define RAIDZ_TEST_H
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#include <sys/spa.h>
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static const char *raidz_impl_names[] = {
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"original",
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"scalar",
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"sse",
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"avx2",
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NULL
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};
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typedef struct raidz_test_opts {
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size_t rto_ashift;
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size_t rto_offset;
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size_t rto_dcols;
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size_t rto_dsize;
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size_t rto_v;
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size_t rto_sweep;
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size_t rto_sweep_timeout;
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size_t rto_benchmark;
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size_t rto_sanity;
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size_t rto_gdb;
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zio_t *zio_golden;
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raidz_map_t *rm_golden;
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} raidz_test_opts_t;
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static const raidz_test_opts_t rto_opts_defaults = {
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.rto_ashift = 9,
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.rto_offset = 1ULL << 0,
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.rto_dcols = 8,
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.rto_dsize = 1<<19,
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.rto_v = 0,
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.rto_sweep = 0,
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.rto_benchmark = 0,
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.rto_sanity = 0,
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.rto_gdb = 0
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};
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extern raidz_test_opts_t rto_opts;
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static inline size_t ilog2(size_t a)
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{
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return (a > 1 ? 1 + ilog2(a >> 1) : 0);
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}
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#define D_ALL 0
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#define D_INFO 1
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#define D_DEBUG 2
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#define LOG(lvl, a...) \
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{ \
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if (rto_opts.rto_v >= lvl) \
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(void) fprintf(stdout, a); \
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} \
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#define LOG_OPT(lvl, opt, a...) \
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{ \
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if (opt->rto_v >= lvl) \
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(void) fprintf(stdout, a); \
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} \
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#define ERR(a...) (void) fprintf(stderr, a)
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#define DBLSEP "================\n"
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#define SEP "----------------\n"
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#define raidz_alloc(size) zio_data_buf_alloc(size)
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#define raidz_free(p, size) zio_data_buf_free(p, size)
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void init_zio_data(zio_t *zio);
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void run_raidz_benchmark(void);
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#endif /* RAIDZ_TEST_H */
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