-
Notifications
You must be signed in to change notification settings - Fork 1.8k
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
SSE, AVX-128 & AVX2 vectorized RAID-Z1/2/3 parity computation.
This is just a proof-of-concept to gauge the interest of doing the parity computation in vector registers. It has received very little testing. Don't use on production systems, obviously :-) SSE should work with any x86-64 CPUs. AVX-128 should work on AVX-enabled CPU, i.e. Sandy Bridge and later. AVX2 should work on Haswell and later. The exact variant is picked at runtime.
- Loading branch information
Showing
8 changed files
with
1,253 additions
and
57 deletions.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,80 @@ | ||
| /* | ||
| * CDDL HEADER START | ||
| * | ||
| * The contents of this file are subject to the terms of the | ||
| * Common Development and Distribution License (the "License"). | ||
| * You may not use this file except in compliance with the License. | ||
| * | ||
| * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE | ||
| * or http://www.opensolaris.org/os/licensing. | ||
| * See the License for the specific language governing permissions | ||
| * and limitations under the License. | ||
| * | ||
| * When distributing Covered Code, include this CDDL HEADER in each | ||
| * file and include the License file at usr/src/OPENSOLARIS.LICENSE. | ||
| * If applicable, add the following below this CDDL HEADER, with the | ||
| * fields enclosed by brackets "[]" replaced with your own identifying | ||
| * information: Portions Copyright [yyyy] [name of copyright owner] | ||
| * | ||
| * CDDL HEADER END | ||
| */ | ||
|
|
||
| /* | ||
| * Copyright (c) 2005, 2010, Oracle and/or its affiliates. All rights reserved. | ||
| * Copyright (c) 2012, 2014 by Delphix. All rights reserved. | ||
| */ | ||
|
|
||
| typedef struct raidz_col { | ||
| uint64_t rc_devidx; /* child device index for I/O */ | ||
| uint64_t rc_offset; /* device offset */ | ||
| uint64_t rc_size; /* I/O size */ | ||
| void *rc_data; /* I/O data */ | ||
| void *rc_gdata; /* used to store the "good" version */ | ||
| int rc_error; /* I/O error for this device */ | ||
| uint8_t rc_tried; /* Did we attempt this I/O column? */ | ||
| uint8_t rc_skipped; /* Did we skip this I/O column? */ | ||
| } raidz_col_t; | ||
|
|
||
| typedef struct raidz_map { | ||
| uint64_t rm_cols; /* Regular column count */ | ||
| uint64_t rm_scols; /* Count including skipped columns */ | ||
| uint64_t rm_bigcols; /* Number of oversized columns */ | ||
| uint64_t rm_asize; /* Actual total I/O size */ | ||
| uint64_t rm_missingdata; /* Count of missing data devices */ | ||
| uint64_t rm_missingparity; /* Count of missing parity devices */ | ||
| uint64_t rm_firstdatacol; /* First data column/parity count */ | ||
| uint64_t rm_nskip; /* Skipped sectors for padding */ | ||
| uint64_t rm_skipstart; /* Column index of padding start */ | ||
| void *rm_datacopy; /* rm_asize-buffer of copied data */ | ||
| uintptr_t rm_reports; /* # of referencing checksum reports */ | ||
| uint8_t rm_freed; /* map no longer has referencing ZIO */ | ||
| uint8_t rm_ecksuminjected; /* checksum error was injected */ | ||
| raidz_col_t rm_col[1]; /* Flexible array of I/O columns */ | ||
| } raidz_map_t; | ||
|
|
||
| #define VDEV_RAIDZ_P 0 | ||
| #define VDEV_RAIDZ_Q 1 | ||
| #define VDEV_RAIDZ_R 2 | ||
|
|
||
| #define VDEV_RAIDZ_MUL_2(x) (((x) << 1) ^ (((x) & 0x80) ? 0x1d : 0)) | ||
| #define VDEV_RAIDZ_MUL_4(x) (VDEV_RAIDZ_MUL_2(VDEV_RAIDZ_MUL_2(x))) | ||
|
|
||
| /* | ||
| * We provide a mechanism to perform the field multiplication operation on a | ||
| * 64-bit value all at once rather than a byte at a time. This works by | ||
| * creating a mask from the top bit in each byte and using that to | ||
| * conditionally apply the XOR of 0x1d. | ||
| */ | ||
| #define VDEV_RAIDZ_64MUL_2(x, mask) \ | ||
| { \ | ||
| (mask) = (x) & 0x8080808080808080ULL; \ | ||
| (mask) = ((mask) << 1) - ((mask) >> 7); \ | ||
| (x) = (((x) << 1) & 0xfefefefefefefefeULL) ^ \ | ||
| ((mask) & 0x1d1d1d1d1d1d1d1dULL); \ | ||
| } | ||
|
|
||
| #define VDEV_RAIDZ_64MUL_4(x, mask) \ | ||
| { \ | ||
| VDEV_RAIDZ_64MUL_2((x), mask); \ | ||
| VDEV_RAIDZ_64MUL_2((x), mask); \ | ||
| } |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Oops, something went wrong.