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construct/ircd/db_allocator.cc

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// The Construct
//
// Copyright (C) The Construct Developers, Authors & Contributors
// Copyright (C) 2016-2020 Jason Volk <jason@zemos.net>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice is present in all copies. The
// full license for this software is available in the LICENSE file.
#include <RB_INC_SYS_MMAN_H
#include <RB_INC_JEMALLOC_H
#include "db.h"
#ifndef IRCD_DB_HAS_ALLOCATOR
#warning "Consider upgrading to rocksdb 5.18+ for improved memory management."
#endif
#if defined(IRCD_ALLOCATOR_USE_JEMALLOC) && defined(HAVE_JEMALLOC_H)
#define IRCD_DB_USE_JEMALLOC
#else
#warning "Consider building with jemalloc for improved memory management."
#endif
//
// database::allocator
//
#ifdef IRCD_DB_HAS_ALLOCATOR
namespace ircd::db
{
#ifdef IRCD_DB_USE_JEMALLOC
static void *cache_arena_handle_alloc(extent_hooks_t *, void *, size_t, size_t, bool *, bool *, uint) noexcept;
static bool cache_arena_handle_dalloc(extent_hooks_t *, void *, size_t, bool, uint) noexcept;
static void cache_arena_handle_destroy(extent_hooks_t *, void *, size_t, bool, uint) noexcept;
static bool cache_arena_handle_commit(extent_hooks_t *, void *, size_t, size_t, size_t, uint) noexcept;
static bool cache_arena_handle_decommit(extent_hooks_t *, void *, size_t, size_t, size_t, uint) noexcept;
static bool cache_arena_handle_purge_lazy(extent_hooks_t *, void *, size_t, size_t, size_t, uint) noexcept;
static bool cache_arena_handle_purge_forced(extent_hooks_t *, void *, size_t, size_t, size_t, uint) noexcept;
static bool cache_arena_handle_split(extent_hooks_t *, void *, size_t, size_t, size_t, bool, uint) noexcept;
static bool cache_arena_handle_merge(extent_hooks_t *, void *, size_t, void *, size_t, bool, uint) noexcept;
thread_local extent_hooks_t *their_cache_arena_hooks, cache_arena_hooks;
#endif
}
decltype(ircd::db::database::allocator::ALIGN_DEFAULT)
ircd::db::database::allocator::ALIGN_DEFAULT
{
#if defined(__AVX512F__)
64
#elif defined(__AVX__)
32
#elif defined(__SSE__)
16
#else
sizeof(void *)
#endif
};
decltype(ircd::db::database::allocator::mlock_limit)
ircd::db::database::allocator::mlock_limit
{
ircd::allocator::rlimit_memlock()
};
decltype(ircd::db::database::allocator::mlock_enabled)
ircd::db::database::allocator::mlock_enabled
{
mlock_limit == -1UL
// mlock2() not supported by valgrind
&& !vg::active
};
decltype(ircd::db::database::allocator::mlock_current)
ircd::db::database::allocator::mlock_current;
/// Handle to a jemalloc arena when non-zero. Used as the base arena for all
/// cache allocators.
decltype(ircd::db::database::allocator::cache_arena)
ircd::db::database::allocator::cache_arena;
void
ircd::db::database::allocator::init()
{
#ifdef IRCD_DB_USE_JEMALLOC
cache_arena = ircd::allocator::get<unsigned>("arenas.create");
char extent_hooks_keybuf[32];
const string_view cache_arena_hooks_key{fmt::sprintf
{
extent_hooks_keybuf, "arena.%u.extent_hooks", cache_arena
}};
cache_arena_hooks.alloc = cache_arena_handle_alloc;
cache_arena_hooks.dalloc = cache_arena_handle_dalloc;
cache_arena_hooks.destroy = cache_arena_handle_destroy;
cache_arena_hooks.commit = cache_arena_handle_commit;
cache_arena_hooks.decommit = cache_arena_handle_decommit;
cache_arena_hooks.purge_lazy = cache_arena_handle_purge_lazy;
cache_arena_hooks.purge_forced = cache_arena_handle_purge_forced;
cache_arena_hooks.split = cache_arena_handle_split;
cache_arena_hooks.merge = cache_arena_handle_merge;
ircd::allocator::set(cache_arena_hooks_key, &cache_arena_hooks, their_cache_arena_hooks);
assert(their_cache_arena_hooks);
#endif
}
void
ircd::db::database::allocator::fini()
noexcept
{
#ifdef IRCD_DB_USE_JEMALLOC
if(likely(cache_arena != 0))
{
char keybuf[64];
ircd::allocator::get<void>(string_view(fmt::sprintf
{
keybuf, "arena.%u.reset", cache_arena
}));
ircd::allocator::get<void>(string_view(fmt::sprintf
{
keybuf, "arena.%u.destroy", cache_arena
}));
}
#endif
}
#ifdef IRCD_DB_USE_JEMALLOC
void *
ircd::db::cache_arena_handle_alloc(extent_hooks_t *const hooks,
void *const new_addr,
size_t size,
size_t alignment,
bool *const zero,
bool *const commit,
unsigned arena_ind)
noexcept
{
assert(their_cache_arena_hooks);
const auto &their_hooks(*their_cache_arena_hooks);
assert(zero);
assert(commit);
if constexpr(RB_DEBUG_DB_ALLOCATOR)
log::debug
{
log, "cache arena:%u alloc addr:%p size:%zu align:%zu z:%b c:%b ind:%u",
database::allocator::cache_arena,
new_addr,
size,
alignment,
*zero,
*commit,
arena_ind,
};
void *const ret
{
their_hooks.alloc(hooks, new_addr, size, alignment, zero, commit, arena_ind)
};
// This feature is only enabled when RLIMIT_MEMLOCK is unlimited. We don't
// want to deal with any limit at all.
#if defined(HAVE_MLOCK2) && defined(MLOCK_ONFAULT)
if(database::allocator::mlock_enabled)
{
syscall(::mlock2, ret, size, MLOCK_ONFAULT);
database::allocator::mlock_current += size;
}
#endif
return ret;
}
#endif
#ifdef IRCD_DB_USE_JEMALLOC
bool
ircd::db::cache_arena_handle_dalloc(extent_hooks_t *hooks,
void *const ptr,
size_t size,
bool committed,
uint arena_ind)
noexcept
{
assert(their_cache_arena_hooks);
const auto &their_hooks(*their_cache_arena_hooks);
if constexpr(RB_DEBUG_DB_ALLOCATOR)
log::debug
{
log, "cache arena:%u dalloc addr:%p size:%zu align:%zu z:%b c:%b ind:%u",
database::allocator::cache_arena,
ptr,
size,
committed,
arena_ind,
};
const bool ret
{
their_hooks.dalloc(hooks, ptr, size, committed, arena_ind)
};
#if defined(HAVE_MLOCK2)
if(database::allocator::mlock_current && !ret)
{
syscall(::munlock, ptr, size);
assert(database::allocator::mlock_current >= size);
database::allocator::mlock_current -= size;
}
#endif
return ret;
}
#endif
#ifdef IRCD_DB_USE_JEMALLOC
void
ircd::db::cache_arena_handle_destroy(extent_hooks_t *hooks,
void *const ptr,
size_t size,
bool committed,
uint arena_ind)
noexcept
{
assert(their_cache_arena_hooks);
const auto &their_hooks(*their_cache_arena_hooks);
if constexpr(RB_DEBUG_DB_ALLOCATOR)
log::debug
{
log, "cache arena:%u destroy addr:%p size:%zu align:%zu z:%b c:%b ind:%u",
database::allocator::cache_arena,
ptr,
size,
committed,
arena_ind,
};
#if defined(HAVE_MLOCK2)
if(database::allocator::mlock_current)
{
syscall(::munlock, ptr, size);
assert(database::allocator::mlock_current >= size);
database::allocator::mlock_current -= size;
}
#endif
return their_hooks.destroy(hooks, ptr, size, committed, arena_ind);
}
#endif
#ifdef IRCD_DB_USE_JEMALLOC
bool
ircd::db::cache_arena_handle_commit(extent_hooks_t *const hooks,
void *const ptr,
size_t size,
size_t offset,
size_t length,
uint arena_ind)
noexcept
{
assert(their_cache_arena_hooks);
const auto &their_hooks(*their_cache_arena_hooks);
if constexpr(RB_DEBUG_DB_ALLOCATOR)
log::debug
{
log, "cache arena:%u commit addr:%p size:%zu offset:%zu length:%zu ind:%u",
database::allocator::cache_arena,
ptr,
size,
offset,
length,
arena_ind,
};
return their_hooks.commit(hooks, ptr, size, offset, length, arena_ind);
}
#endif
#ifdef IRCD_DB_USE_JEMALLOC
bool
ircd::db::cache_arena_handle_decommit(extent_hooks_t *const hooks,
void *const ptr,
size_t size,
size_t offset,
size_t length,
uint arena_ind)
noexcept
{
assert(their_cache_arena_hooks);
const auto &their_hooks(*their_cache_arena_hooks);
if constexpr(RB_DEBUG_DB_ALLOCATOR)
log::debug
{
log, "cache arena:%u decommit addr:%p size:%zu offset:%zu length:%zu ind:%u",
database::allocator::cache_arena,
ptr,
size,
offset,
length,
arena_ind,
};
return their_hooks.decommit(hooks, ptr, size, offset, length, arena_ind);
}
#endif
#ifdef IRCD_DB_USE_JEMALLOC
bool
ircd::db::cache_arena_handle_purge_lazy(extent_hooks_t *const hooks,
void *const ptr,
size_t size,
size_t offset,
size_t length,
uint arena_ind)
noexcept
{
assert(their_cache_arena_hooks);
const auto &their_hooks(*their_cache_arena_hooks);
if constexpr(RB_DEBUG_DB_ALLOCATOR)
log::debug
{
log, "cache arena:%u purge lazy addr:%p size:%zu offset:%zu length:%zu ind:%u",
database::allocator::cache_arena,
ptr,
size,
offset,
length,
arena_ind,
};
return their_hooks.purge_lazy(hooks, ptr, size, offset, length, arena_ind);
}
#endif
#ifdef IRCD_DB_USE_JEMALLOC
bool
ircd::db::cache_arena_handle_purge_forced(extent_hooks_t *const hooks,
void *const ptr,
size_t size,
size_t offset,
size_t length,
uint arena_ind)
noexcept
{
assert(their_cache_arena_hooks);
const auto &their_hooks(*their_cache_arena_hooks);
if constexpr(RB_DEBUG_DB_ALLOCATOR)
log::debug
{
log, "cache arena:%u purge forced addr:%p size:%zu offset:%zu length:%zu ind:%u",
database::allocator::cache_arena,
ptr,
size,
offset,
length,
arena_ind,
};
return their_hooks.purge_forced(hooks, ptr, size, offset, length, arena_ind);
}
#endif
#ifdef IRCD_DB_USE_JEMALLOC
bool
ircd::db::cache_arena_handle_split(extent_hooks_t *const hooks,
void *const ptr,
size_t size,
size_t size_a,
size_t size_b,
bool committed,
uint arena_ind)
noexcept
{
assert(their_cache_arena_hooks);
const auto &their_hooks(*their_cache_arena_hooks);
if constexpr(RB_DEBUG_DB_ALLOCATOR)
log::debug
{
log, "cache arena:%u split addr:%p size:%zu size_a:%zu size_b:%zu committed:%b ind:%u",
database::allocator::cache_arena,
ptr,
size,
size_a,
size_b,
committed,
arena_ind,
};
return their_hooks.split(hooks, ptr, size, size_a, size_b, committed, arena_ind);
}
#endif
#ifdef IRCD_DB_USE_JEMALLOC
bool
ircd::db::cache_arena_handle_merge(extent_hooks_t *const hooks,
void *const addr_a,
size_t size_a,
void *const addr_b,
size_t size_b,
bool committed,
uint arena_ind)
noexcept
{
assert(their_cache_arena_hooks);
const auto &their_hooks(*their_cache_arena_hooks);
if constexpr(RB_DEBUG_DB_ALLOCATOR)
log::debug
{
log, "cache arena:%u merge a[addr:%p size:%zu] b[addr:%p size:%zu] committed:%b ind:%u",
database::allocator::cache_arena,
addr_a,
size_a,
addr_b,
size_b,
committed,
arena_ind,
};
return their_hooks.merge(hooks, addr_a, size_a, addr_b, size_b, committed, arena_ind);
}
#endif
//
// allocator::allocator
//
ircd::db::database::allocator::allocator(database *const &d,
database::column *const &c,
const unsigned &arena,
const size_t &alignment)
:d{d}
,c{c}
,alignment{alignment}
,arena{arena}
,arena_flags
{
0
#ifdef IRCD_DB_USE_JEMALLOC
| MALLOCX_ARENA(this->arena)
| MALLOCX_ALIGN(this->alignment)
| MALLOCX_TCACHE_NONE
#endif
}
{
assert(math::is_pow2(alignment));
}
ircd::db::database::allocator::~allocator()
noexcept
{
}
size_t
ircd::db::database::allocator::UsableSize(void *const ptr,
size_t size)
const noexcept
{
const size_t ret
{
#ifdef IRCD_DB_USE_JEMALLOC
sallocx(ptr, arena_flags)
#else
size % alignment != 0?
size + (alignment - (size % alignment)):
size
#endif
};
#ifndef IRCD_DB_USE_JEMALLOC
assert(ret % alignment == 0);
assert(alignment % sizeof(void *) == 0);
#endif
return ret;
}
void
ircd::db::database::allocator::Deallocate(void *const ptr)
noexcept
{
#ifdef IRCD_DB_USE_JEMALLOC
dallocx(ptr, arena_flags);
#else
std::free(ptr);
#endif
}
void *
ircd::db::database::allocator::Allocate(size_t size)
noexcept
{
assert(size > 0UL);
assert(size < 256_GiB);
const auto ptr
{
#ifdef IRCD_DB_USE_JEMALLOC
mallocx(size, arena_flags)
#else
ircd::allocator::aligned_alloc(alignment, size).release()
#endif
};
assert(d);
if constexpr(RB_DEBUG_DB_ALLOCATOR)
log::debug
{
log, "[%s]'%s' allocate:%zu alignment:%zu %p",
db::name(*d),
c? string_view(db::name(*c)): string_view{},
size,
alignment,
ptr,
};
return ptr;
}
const char *
ircd::db::database::allocator::Name()
const noexcept
{
return c? db::name(*c).c_str():
d? db::name(*d).c_str():
"unaffiliated";
}
#endif IRCD_DB_HAS_ALLOCATOR
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