1 /* Copyright (c) 2004-2022. 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. */
9 #include <xbt/asserts.h>
10 #include <xbt/function_types.h>
12 #include "src/internal_config.h"
19 #include <unordered_map>
25 XBT_PRIVATE FILE* surf_fopen(const std::string& name, const char* mode);
26 XBT_PRIVATE std::ifstream* surf_ifsopen(const std::string& name);
28 /* user-visible parameters */
29 XBT_PUBLIC_DATA double sg_maxmin_precision;
30 XBT_PUBLIC_DATA double sg_surf_precision;
31 XBT_PUBLIC_DATA int sg_concurrency_limit;
32 XBT_PUBLIC_DATA int sg_bmf_max_iterations;
34 extern XBT_PRIVATE double sg_latency_factor;
35 extern XBT_PRIVATE double sg_bandwidth_factor;
36 extern XBT_PRIVATE double sg_weight_S_parameter;
37 extern XBT_PRIVATE std::vector<std::string> surf_path;
38 extern XBT_PRIVATE std::unordered_map<std::string, simgrid::kernel::profile::Profile*> traces_set_list;
40 /** set of hosts for which one want to be notified if they ever restart */
41 inline auto& watched_hosts() // avoid static initialization order fiasco
43 static std::set<std::string, std::less<>> value;
47 static inline void double_update(double* variable, double value, double precision)
50 fprintf(stderr, "Updating %g -= %g +- %g\n", *variable, value, precision);
51 xbt_assert(value == 0.0 || value > precision);
52 // Check that precision is higher than the machine-dependent size of the mantissa. If not, brutal rounding may
53 // happen, and the precision mechanism is not active...
54 xbt_assert(FLT_RADIX == 2 && *variable < precision * exp2(DBL_MANT_DIG));
57 if (*variable < precision)
61 static inline int double_positive(double value, double precision)
63 return (value > precision);
66 static inline int double_equals(double value1, double value2, double precision)
68 return (fabs(value1 - value2) < precision);
71 /** @ingroup SURF_models
72 * @brief Initializes the CPU model with the model Cas01
74 * By default, this model uses the lazy optimization mechanism that relies on partial invalidation in LMM and a heap
75 * for lazy action update.
76 * You can change this behavior by setting the cpu/optim configuration variable to a different value.
78 * You shouldn't have to call it by yourself.
80 XBT_PUBLIC void surf_cpu_model_init_Cas01();
82 /** @ingroup SURF_models
83 * @brief Same as network model 'LagrangeVelho', only with different correction factors.
85 * This model is proposed by Pierre-Nicolas Clauss and Martin Quinson and Stéphane Génaud based on the model 'LV08' and
86 * different correction factors depending on the communication size (< 1KiB, < 64KiB, >= 64KiB).
87 * See comments in the code for more information.
89 * @see surf_host_model_init_SMPI()
94 XBT_PUBLIC void surf_network_model_init_SMPI();
96 /** @ingroup SURF_models
97 * @brief Same as network model 'LagrangeVelho', only with different correction factors.
99 * This model implements a variant of the contention model on Infiniband networks based on
100 * the works of Jérôme Vienne : http://mescal.imag.fr/membres/jean-marc.vincent/index.html/PhD/Vienne.pdf
102 * @see surf_host_model_init_IB()
107 XBT_PUBLIC void surf_network_model_init_IB();
109 /** @ingroup SURF_models
110 * @brief Initializes the platform with the network model 'LegrandVelho'
112 * This model is proposed by Arnaud Legrand and Pedro Velho based on the results obtained with the GTNets simulator for
113 * onelink and dogbone sharing scenarios. See comments in the code for more information.
115 * @see surf_host_model_init_LegrandVelho()
117 XBT_PUBLIC void surf_network_model_init_LegrandVelho();
119 /** @ingroup SURF_models
120 * @brief Initializes the platform with the network model 'Constant'
122 * In this model, the communication time between two network cards is constant, hence no need for a routing table.
123 * This is particularly useful when simulating huge distributed algorithms where scalability is really an issue. This
124 * function is called in conjunction with surf_host_model_init_compound.
126 * @see surf_host_model_init_compound()
128 XBT_PUBLIC void surf_network_model_init_Constant();
130 /** @ingroup SURF_models
131 * @brief Initializes the platform with the network model CM02
133 * You should call this function by yourself only if you plan using surf_host_model_init_compound.
134 * See comments in the code for more information.
136 XBT_PUBLIC void surf_network_model_init_CM02();
138 /** @ingroup SURF_models
139 * @brief Initializes the platform with the network model NS3
141 * This function is called by surf_host_model_init_NS3 or by yourself only if you plan using
142 * surf_host_model_init_compound
144 * @see surf_host_model_init_NS3()
146 #if !SIMGRID_HAVE_NS3
149 XBT_PUBLIC void surf_network_model_init_NS3();
151 /** @ingroup SURF_models
152 * @brief Initializes the VM model used in the platform
154 * A VM model depends on the physical CPU model to share the resources inside the VM
155 * It will also creates the CPU model for actions running inside the VM
157 * Such model is subject to modification with warning in the ChangeLog so monitor it!
159 XBT_PUBLIC void surf_vm_model_init_HL13(simgrid::kernel::resource::CpuModel* cpu_pm_model);
161 /** @ingroup SURF_models
162 * @brief Initializes the platform with a compound host model
164 * This function should be called after a cpu_model and a network_model have been set up.
166 XBT_PUBLIC void surf_host_model_init_compound();
168 /** @ingroup SURF_models
169 * @brief Initializes the platform with the current best network and cpu models at hand
171 * This platform model separates the host model and the network model.
172 * The host model will be initialized with the model compound, the network model with the model LV08 (with cross
173 * traffic support) and the CPU model with the model Cas01.
174 * Such model is subject to modification with warning in the ChangeLog so monitor it!
176 XBT_PUBLIC void surf_host_model_init_current_default();
178 /** @ingroup SURF_models
179 * @brief Initializes the platform with the model L07
181 * With this model, only parallel tasks can be used. Resource sharing is done by identifying bottlenecks and giving an
182 * equal share of the model to each action.
184 XBT_PUBLIC void surf_host_model_init_ptask_L07();
186 /** @ingroup SURF_models
187 * @brief Initializes the platform with the model BMF
189 * With this model, only parallel tasks can be used.
190 * Resource sharing is done by calculating a BMF (bottleneck max fairness) allocation
192 XBT_PUBLIC void surf_host_model_init_ptask_BMF();
194 XBT_PUBLIC void surf_disk_model_init_default();
196 /* --------------------
198 * -------------------- */
199 /** @brief Resource model description */
200 struct surf_model_description_t {
202 const char* description;
203 std::function<void()> model_init_preparse;
206 XBT_PUBLIC const surf_model_description_t* find_model_description(const std::vector<surf_model_description_t>& table,
207 const std::string& name);
208 XBT_PUBLIC void model_help(const char* category, const std::vector<surf_model_description_t>& table);
210 #define SIMGRID_REGISTER_PLUGIN(id, desc, init) \
211 static void XBT_ATTRIB_CONSTRUCTOR(800) _XBT_CONCAT3(simgrid_, id, _plugin_register)() \
213 surf_plugin_description().emplace_back(surf_model_description_t{_XBT_STRINGIFY(id), (desc), (init)}); \
216 /** @brief The list of all available plugins */
217 inline auto& surf_plugin_description() // Function to avoid static initialization order fiasco
219 static std::vector<surf_model_description_t> plugin_description_table;
220 return plugin_description_table;
222 /** @brief The list of all available optimization modes (both for cpu and networks).
223 * These optimization modes can be set using --cfg=cpu/optim:... and --cfg=network/optim:... */
224 XBT_PUBLIC_DATA const std::vector<surf_model_description_t> surf_optimization_mode_description;
225 /** @brief The list of all cpu models (pick one with --cfg=cpu/model) */
226 XBT_PUBLIC_DATA const std::vector<surf_model_description_t> surf_cpu_model_description;
227 /** @brief The list of all network models (pick one with --cfg=network/model) */
228 XBT_PUBLIC_DATA const std::vector<surf_model_description_t> surf_network_model_description;
229 /** @brief The list of all disk models (pick one with --cfg=disk/model) */
230 XBT_PUBLIC_DATA const std::vector<surf_model_description_t> surf_disk_model_description;
231 /** @brief The list of all host models (pick one with --cfg=host/model:) */
232 XBT_PUBLIC_DATA const std::vector<surf_model_description_t> surf_host_model_description;
234 #endif /* SURF_MODEL_H_ */