From 37946731110246b89607b85b391f32b0f390524e Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Marko=20M=C3=A4kel=C3=A4?= Date: Tue, 21 Jun 2022 16:59:49 +0300 Subject: MDEV-28836: Memory alignment cleanup Table_cache_instance: Define the structure aligned at the CPU cache line, and remove a pad[] data member. Krunal Bauskar reported this to improve performance on ARMv8. aligned_malloc(): Wrapper for the Microsoft _aligned_malloc() and the ISO/IEC 9899:2011 aligned_alloc(). Note: The parameters are in the Microsoft order (size, alignment), opposite of aligned_alloc(alignment, size). Note: The standard defines that size must be an integer multiple of alignment. It is enforced by AddressSanitizer but not by GNU libc on Linux. aligned_free(): Wrapper for the Microsoft _aligned_free() and the standard free(). HAVE_ALIGNED_ALLOC: A new test. Unfortunately, support for aligned_alloc() may still be missing on some platforms. We will fall back to posix_memalign() for those cases. HAVE_MEMALIGN: Remove, along with any use of the nonstandard memalign(). PFS_ALIGNEMENT (sic): Removed; we will use CPU_LEVEL1_DCACHE_LINESIZE. PFS_ALIGNED: Defined using the C++11 keyword alignas. buf_pool_t::page_hash_table::create(), lock_sys_t::hash_table::create(): lock_sys_t::hash_table::resize(): Pad the allocation size to an integer multiple of the alignment. Reviewed by: Vladislav Vaintroub --- include/my_global.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include/my_global.h') diff --git a/include/my_global.h b/include/my_global.h index 224909116dd..2eed45e8407 100644 --- a/include/my_global.h +++ b/include/my_global.h @@ -1,6 +1,6 @@ /* Copyright (c) 2001, 2013, Oracle and/or its affiliates. - Copyright (c) 2009, 2021, MariaDB Corporation. + Copyright (c) 2009, 2022, MariaDB Corporation. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by -- cgit v1.2.1