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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) 2016 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.
*
*/
#include <memory>
#include <functional>
#include "crimson/osd/scheduler/mclock_scheduler.h"
#include "common/dout.h"
namespace dmc = crimson::dmclock;
using namespace std::placeholders;
#define dout_context cct
#define dout_subsys ceph_subsys_osd
#undef dout_prefix
#define dout_prefix *_dout
namespace crimson::osd::scheduler {
mClockScheduler::mClockScheduler(ConfigProxy &conf) :
scheduler(
std::bind(&mClockScheduler::ClientRegistry::get_info,
&client_registry,
_1),
dmc::AtLimit::Allow,
conf.get_val<double>("osd_mclock_scheduler_anticipation_timeout"))
{
conf.add_observer(this);
client_registry.update_from_config(conf);
}
void mClockScheduler::ClientRegistry::update_from_config(const ConfigProxy &conf)
{
default_external_client_info.update(
conf.get_val<uint64_t>("osd_mclock_scheduler_client_res"),
conf.get_val<uint64_t>("osd_mclock_scheduler_client_wgt"),
conf.get_val<uint64_t>("osd_mclock_scheduler_client_lim"));
internal_client_infos[
static_cast<size_t>(scheduler_class_t::background_recovery)].update(
conf.get_val<uint64_t>("osd_mclock_scheduler_background_recovery_res"),
conf.get_val<uint64_t>("osd_mclock_scheduler_background_recovery_wgt"),
conf.get_val<uint64_t>("osd_mclock_scheduler_background_recovery_lim"));
internal_client_infos[
static_cast<size_t>(scheduler_class_t::background_best_effort)].update(
conf.get_val<uint64_t>("osd_mclock_scheduler_background_best_effort_res"),
conf.get_val<uint64_t>("osd_mclock_scheduler_background_best_effort_wgt"),
conf.get_val<uint64_t>("osd_mclock_scheduler_background_best_effort_lim"));
}
const dmc::ClientInfo *mClockScheduler::ClientRegistry::get_external_client(
const client_profile_id_t &client) const
{
auto ret = external_client_infos.find(client);
if (ret == external_client_infos.end())
return &default_external_client_info;
else
return &(ret->second);
}
const dmc::ClientInfo *mClockScheduler::ClientRegistry::get_info(
const scheduler_id_t &id) const {
switch (id.class_id) {
case scheduler_class_t::immediate:
ceph_assert(0 == "Cannot schedule immediate");
return (dmc::ClientInfo*)nullptr;
case scheduler_class_t::repop:
case scheduler_class_t::client:
return get_external_client(id.client_profile_id);
default:
ceph_assert(static_cast<size_t>(id.class_id) < internal_client_infos.size());
return &internal_client_infos[static_cast<size_t>(id.class_id)];
}
}
void mClockScheduler::dump(ceph::Formatter &f) const
{
}
void mClockScheduler::enqueue(item_t&& item)
{
auto id = get_scheduler_id(item);
auto cost = item.params.cost;
if (scheduler_class_t::immediate == item.params.klass) {
immediate.push_front(std::move(item));
} else {
scheduler.add_request(
std::move(item),
id,
cost);
}
}
void mClockScheduler::enqueue_front(item_t&& item)
{
immediate.push_back(std::move(item));
// TODO: item may not be immediate, update mclock machinery to permit
// putting the item back in the queue
}
item_t mClockScheduler::dequeue()
{
if (!immediate.empty()) {
auto ret = std::move(immediate.back());
immediate.pop_back();
return ret;
} else {
mclock_queue_t::PullReq result = scheduler.pull_request();
if (result.is_future()) {
ceph_assert(
0 == "Not implemented, user would have to be able to be woken up");
return std::move(*(item_t*)nullptr);
} else if (result.is_none()) {
ceph_assert(
0 == "Impossible, must have checked empty() first");
return std::move(*(item_t*)nullptr);
} else {
ceph_assert(result.is_retn());
auto &retn = result.get_retn();
return std::move(*retn.request);
}
}
}
const char** mClockScheduler::get_tracked_conf_keys() const
{
static const char* KEYS[] = {
"osd_mclock_scheduler_client_res",
"osd_mclock_scheduler_client_wgt",
"osd_mclock_scheduler_client_lim",
"osd_mclock_scheduler_background_recovery_res",
"osd_mclock_scheduler_background_recovery_wgt",
"osd_mclock_scheduler_background_recovery_lim",
"osd_mclock_scheduler_background_best_effort_res",
"osd_mclock_scheduler_background_best_effort_wgt",
"osd_mclock_scheduler_background_best_effort_lim",
NULL
};
return KEYS;
}
void mClockScheduler::handle_conf_change(
const ConfigProxy& conf,
const std::set<std::string> &changed)
{
client_registry.update_from_config(conf);
}
}
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