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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:45:59 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-07 18:45:59 +0000
commit19fcec84d8d7d21e796c7624e521b60d28ee21ed (patch)
tree42d26aa27d1e3f7c0b8bd3fd14e7d7082f5008dc /src/crimson/osd/scheduler/scheduler.h
parentInitial commit. (diff)
downloadceph-19fcec84d8d7d21e796c7624e521b60d28ee21ed.tar.xz
ceph-19fcec84d8d7d21e796c7624e521b60d28ee21ed.zip
Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/crimson/osd/scheduler/scheduler.h')
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+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+/*
+ * Ceph - scalable distributed file system
+ *
+ * Copyright (C) 2019 Red Hat Inc.
+ *
+ * This is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License version 2.1, as published by the Free Software
+ * Foundation. See file COPYING.
+ *
+ */
+
+#pragma once
+
+#include <seastar/core/future.hh>
+#include <ostream>
+
+#include "crimson/common/config_proxy.h"
+
+namespace crimson::osd::scheduler {
+
+enum class scheduler_class_t : uint8_t {
+ background_best_effort = 0,
+ background_recovery,
+ client,
+ repop,
+ immediate,
+};
+
+std::ostream &operator<<(std::ostream &, const scheduler_class_t &);
+
+using client_t = uint64_t;
+using cost_t = uint64_t;
+
+struct params_t {
+ cost_t cost = 1;
+ client_t owner;
+ scheduler_class_t klass;
+};
+
+struct item_t {
+ params_t params;
+ seastar::promise<> wake;
+};
+
+/**
+ * Base interface for classes responsible for choosing
+ * op processing order in the OSD.
+ */
+class Scheduler {
+public:
+ // Enqueue op for scheduling
+ virtual void enqueue(item_t &&item) = 0;
+
+ // Enqueue op for processing as though it were enqueued prior
+ // to other items already scheduled.
+ virtual void enqueue_front(item_t &&item) = 0;
+
+ // Returns true iff there are no ops scheduled
+ virtual bool empty() const = 0;
+
+ // Return next op to be processed
+ virtual item_t dequeue() = 0;
+
+ // Dump formatted representation for the queue
+ virtual void dump(ceph::Formatter &f) const = 0;
+
+ // Print human readable brief description with relevant parameters
+ virtual void print(std::ostream &out) const = 0;
+
+ // Destructor
+ virtual ~Scheduler() {};
+};
+
+std::ostream &operator<<(std::ostream &lhs, const Scheduler &);
+using SchedulerRef = std::unique_ptr<Scheduler>;
+
+SchedulerRef make_scheduler(ConfigProxy &);
+
+}