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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-21 11:54:28 +0000 |
commit | e6918187568dbd01842d8d1d2c808ce16a894239 (patch) | |
tree | 64f88b554b444a49f656b6c656111a145cbbaa28 /src/rocksdb/memory/concurrent_arena.cc | |
parent | Initial commit. (diff) | |
download | ceph-upstream/18.2.2.tar.xz ceph-upstream/18.2.2.zip |
Adding upstream version 18.2.2.upstream/18.2.2
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/rocksdb/memory/concurrent_arena.cc | 45 |
1 files changed, 45 insertions, 0 deletions
diff --git a/src/rocksdb/memory/concurrent_arena.cc b/src/rocksdb/memory/concurrent_arena.cc new file mode 100644 index 000000000..1619bd93b --- /dev/null +++ b/src/rocksdb/memory/concurrent_arena.cc @@ -0,0 +1,45 @@ +// Copyright (c) 2011-present, Facebook, Inc. All rights reserved. +// This source code is licensed under both the GPLv2 (found in the +// COPYING file in the root directory) and Apache 2.0 License +// (found in the LICENSE.Apache file in the root directory). +// +// Copyright (c) 2011 The LevelDB Authors. All rights reserved. +// Use of this source code is governed by a BSD-style license that can be +// found in the LICENSE file. See the AUTHORS file for names of contributors. + +#include "memory/concurrent_arena.h" + +#include <thread> + +#include "port/port.h" +#include "util/random.h" + +namespace ROCKSDB_NAMESPACE { + +thread_local size_t ConcurrentArena::tls_cpuid = 0; + +namespace { +// If the shard block size is too large, in the worst case, every core +// allocates a block without populate it. If the shared block size is +// 1MB, 64 cores will quickly allocate 64MB, and may quickly trigger a +// flush. Cap the size instead. +const size_t kMaxShardBlockSize = size_t{128 * 1024}; +} // namespace + +ConcurrentArena::ConcurrentArena(size_t block_size, AllocTracker* tracker, + size_t huge_page_size) + : shard_block_size_(std::min(kMaxShardBlockSize, block_size / 8)), + shards_(), + arena_(block_size, tracker, huge_page_size) { + Fixup(); +} + +ConcurrentArena::Shard* ConcurrentArena::Repick() { + auto shard_and_index = shards_.AccessElementAndIndex(); + // even if we are cpu 0, use a non-zero tls_cpuid so we can tell we + // have repicked + tls_cpuid = shard_and_index.second | shards_.Size(); + return shard_and_index.first; +} + +} // namespace ROCKSDB_NAMESPACE |