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2538c7cf89
- Make accelerated checksum available to InnoDB and XtraDB.
- Fall back to slice-by-eight if not available. The mode used is printed on startup.
- Will only build on POWER systems at the moment until CMakeLists are modified
to only add the crc32_power8/ files when building on POWER.
running MySQL-5.7 unittest/gunit/innodb/ut0crc32-t
Before:
1..2
Using software crc32 implementation, CPU is little-endian
ok 1
Using software crc32 implementation, CPU is little-endian
normal CRC32: real 0.148006 sec
normal CRC32: user 0.148000 sec
normal CRC32: sys 0.000000 sec
big endian CRC32: real 0.144293 sec
big endian CRC32: user 0.144000 sec
big endian CRC32: sys 0.000000 sec
ok 2
After:
1..2
Using POWER8 crc32 implementation, CPU is little-endian
ok 1
Using POWER8 crc32 implementation, CPU is little-endian
normal CRC32: real 0.008097 sec
normal CRC32: user 0.008000 sec
normal CRC32: sys 0.000000 sec
big endian CRC32: real 0.147043 sec
big endian CRC32: user 0.144000 sec
big endian CRC32: sys 0.000000 sec
ok 2
Author CRC32 ASM code: Anton Blanchard <anton@au.ibm.com>
ref: https://github.com/antonblanchard/crc32-vpmsum
Signed-off-by: Daniel Black <daniel.black@au.ibm.com>
52 lines
1.8 KiB
C
52 lines
1.8 KiB
C
/*****************************************************************************
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Copyright (c) 2011, 2011, Oracle and/or its affiliates. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA
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*****************************************************************************/
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/**************************************************//**
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@file include/ut0crc32.h
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CRC32 implementation
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Created Aug 10, 2011 Vasil Dimov
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*******************************************************/
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#ifndef ut0crc32_h
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#define ut0crc32_h
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#include "univ.i"
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/********************************************************************//**
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Initializes the data structures used by ut_crc32(). Does not do any
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allocations, would not hurt if called twice, but would be pointless. */
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UNIV_INTERN
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void
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ut_crc32_init();
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/*===========*/
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/********************************************************************//**
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Calculates CRC32.
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@param ptr - data over which to calculate CRC32.
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@param len - data length in bytes.
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@return CRC32 (CRC-32C, using the GF(2) primitive polynomial 0x11EDC6F41,
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or 0x1EDC6F41 without the high-order bit) */
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typedef ib_uint32_t (*ib_ut_crc32_t)(const byte* ptr, ulint len);
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extern ib_ut_crc32_t ut_crc32;
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extern bool ut_crc32_sse2_enabled;
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extern bool ut_crc32_power8_enabled;
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#endif /* ut0crc32_h */
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