de38091827
Streaming is handled by just once group for CPU scheduling, so
separating it into read and write classes for I/O is artificial, and
inflates the resources we allow for streaming if both reads and writes
happen at the same time.
Merge both classes into one class ("streaming") and adjust callers. The
merged class has 200 shares, so it reduces streaming bandwidth if both
directions are active at the same time (which is rare; I think it only
happens in view building).
90 lines
2.3 KiB
C++
90 lines
2.3 KiB
C++
/*
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* Copyright 2016 ScyllaDB
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*/
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/*
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* This file is part of Scylla.
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*
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* Scylla is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* Scylla is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with Scylla. If not, see <http://www.gnu.org/licenses/>.
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*/
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#pragma once
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#include <seastar/core/file.hh>
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#include "seastarx.hh"
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namespace service {
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class priority_manager {
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::io_priority_class _commitlog_priority;
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::io_priority_class _mt_flush_priority;
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::io_priority_class _streaming_priority;
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::io_priority_class _sstable_query_read;
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::io_priority_class _compaction_priority;
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public:
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const ::io_priority_class&
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commitlog_priority() const {
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return _commitlog_priority;
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}
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const ::io_priority_class&
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memtable_flush_priority() const {
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return _mt_flush_priority;
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}
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const ::io_priority_class&
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streaming_priority() const {
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return _streaming_priority;
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}
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const ::io_priority_class&
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sstable_query_read_priority() const {
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return _sstable_query_read;
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}
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const ::io_priority_class&
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compaction_priority() const {
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return _compaction_priority;
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}
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priority_manager();
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};
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priority_manager& get_local_priority_manager();
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const inline ::io_priority_class&
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get_local_commitlog_priority() {
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return get_local_priority_manager().commitlog_priority();
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}
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const inline ::io_priority_class&
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get_local_memtable_flush_priority() {
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return get_local_priority_manager().memtable_flush_priority();
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}
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const inline ::io_priority_class&
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get_local_streaming_priority() {
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return get_local_priority_manager().streaming_priority();
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}
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const inline ::io_priority_class&
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get_local_sstable_query_read_priority() {
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return get_local_priority_manager().sstable_query_read_priority();
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}
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const inline ::io_priority_class&
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get_local_compaction_priority() {
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return get_local_priority_manager().compaction_priority();
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}
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}
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