1 /* Copyright (c) 2019-2023. The SimGrid Team. All rights reserved. */
3 /* This program is free software; you can redistribute it and/or modify it
4 * under the terms of the license (GNU LGPL) which comes with this package. */
6 #include "DiskImpl.hpp"
8 #include "simgrid/s4u/Engine.hpp"
9 #include "src/kernel/EngineImpl.hpp"
10 #include "src/kernel/lmm/maxmin.hpp"
11 #include "src/kernel/resource/profile/Profile.hpp"
13 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(res_disk, ker_resource, "Disk resources, that fuel I/O activities");
14 namespace simgrid::kernel::resource {
16 xbt::signal<void(DiskAction const&, Action::State, Action::State)> DiskAction::on_state_change;
21 DiskImpl::DiskImpl(const std::string& name, double read_bandwidth, double write_bandwidth)
22 : Resource_T(name), piface_(this)
24 read_bw_.peak = read_bandwidth;
26 write_bw_.peak = write_bandwidth;
27 write_bw_.scale = 1.0;
30 DiskImpl* DiskImpl::set_host(s4u::Host* host)
32 xbt_assert(host, "Cannot set host, none given");
37 DiskImpl* DiskImpl::set_read_constraint(lmm::Constraint* constraint_read)
39 constraint_read_ = constraint_read;
43 DiskImpl* DiskImpl::set_write_constraint(lmm::Constraint* constraint_write)
45 constraint_write_ = constraint_write;
49 /** @brief Fire the required callbacks and destroy the object
51 * Don't delete directly a Disk, call d->destroy() instead.
53 void DiskImpl::destroy()
55 s4u::Disk::on_destruction(piface_);
59 void DiskImpl::turn_on()
63 s4u::Disk::on_state_change(piface_);
66 void DiskImpl::turn_off()
70 s4u::Disk::on_state_change(piface_);
74 DiskImpl* DiskImpl::set_read_bandwidth_profile(profile::Profile* profile)
77 xbt_assert(read_bw_.event == nullptr, "Cannot set a second read bandwidth profile to Disk %s", get_cname());
78 read_bw_.event = profile->schedule(&profile::future_evt_set, this);
83 DiskImpl* DiskImpl::set_write_bandwidth_profile(profile::Profile* profile)
86 xbt_assert(write_bw_.event == nullptr, "Cannot set a second read bandwidth profile to Disk %s", get_cname());
87 write_bw_.event = profile->schedule(&profile::future_evt_set, this);
97 xbt_assert(this->get_model(), "Cannot seal Disk (%s) without setting the model first", get_cname());
98 lmm::System* maxmin_system = get_model()->get_maxmin_system();
99 /* set readwrite constraint if not configured by user */
100 if (readwrite_bw_ == -1) {
101 readwrite_bw_ = std::max(read_bw_.peak, write_bw_.peak);
103 this->set_read_constraint(maxmin_system->constraint_new(this, read_bw_.peak * read_bw_.scale))
104 ->set_write_constraint(maxmin_system->constraint_new(this, write_bw_.peak * write_bw_.scale))
105 ->set_constraint(maxmin_system->constraint_new(this, readwrite_bw_));
106 apply_sharing_policy_cfg();
107 XBT_DEBUG("Create resource with read_bw '%f' write_bw '%f'", read_bw_.peak, write_bw_.peak);
112 constexpr kernel::lmm::Constraint::SharingPolicy to_maxmin_policy(s4u::Disk::SharingPolicy policy)
114 kernel::lmm::Constraint::SharingPolicy lmm_policy = kernel::lmm::Constraint::SharingPolicy::SHARED;
115 if (policy == s4u::Disk::SharingPolicy::NONLINEAR)
116 lmm_policy = kernel::lmm::Constraint::SharingPolicy::NONLINEAR;
120 void DiskImpl::set_read_bandwidth(double value)
122 read_bw_.peak = value;
123 if (constraint_read_)
124 get_model()->get_maxmin_system()->update_constraint_bound(constraint_read_, read_bw_.peak * read_bw_.scale);
127 void DiskImpl::set_write_bandwidth(double value)
129 write_bw_.peak = value;
130 if (constraint_write_) {
131 get_model()->get_maxmin_system()->update_constraint_bound(constraint_write_, write_bw_.peak* write_bw_.scale);
135 void DiskImpl::set_readwrite_bandwidth(double value)
137 readwrite_bw_ = value;
138 if (get_constraint()) {
139 get_model()->get_maxmin_system()->update_constraint_bound(get_constraint(), readwrite_bw_);
143 void DiskImpl::set_sharing_policy(s4u::Disk::Operation op, s4u::Disk::SharingPolicy policy,
144 const s4u::NonLinearResourceCb& cb)
146 sharing_policy_[op] = policy;
147 sharing_policy_cb_[op] = cb;
148 apply_sharing_policy_cfg();
151 s4u::Disk::SharingPolicy DiskImpl::get_sharing_policy(s4u::Disk::Operation op) const
153 return sharing_policy_.at(op);
156 void DiskImpl::apply_sharing_policy_cfg()
158 if (get_constraint())
159 get_constraint()->set_sharing_policy(to_maxmin_policy(sharing_policy_[s4u::Disk::Operation::READWRITE]),
160 sharing_policy_cb_[s4u::Disk::Operation::READWRITE]);
161 if (constraint_read_)
162 constraint_read_->set_sharing_policy(to_maxmin_policy(sharing_policy_[s4u::Disk::Operation::READ]),
163 sharing_policy_cb_[s4u::Disk::Operation::READ]);
164 if (constraint_write_)
165 constraint_write_->set_sharing_policy(to_maxmin_policy(sharing_policy_[s4u::Disk::Operation::WRITE]),
166 sharing_policy_cb_[s4u::Disk::Operation::WRITE]);
169 void DiskImpl::set_factor_cb(const std::function<s4u::Disk::IoFactorCb>& cb)
171 xbt_assert(not is_sealed(), "Cannot set I/O factor callback in an already sealed disk(%s)", get_cname());
178 void DiskAction::set_state(Action::State new_state)
180 Action::State previous_state = get_state();
181 if (new_state != previous_state) { // Trigger only if the state changed
182 Action::set_state(new_state);
183 on_state_change(*this, previous_state, new_state);
187 void DiskAction::update_remains_lazy(double /*now*/)
191 } // namespace simgrid::kernel::resource