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;
33 extern XBT_PRIVATE std::vector<std::string> surf_path;
34 extern XBT_PRIVATE std::unordered_map<std::string, simgrid::kernel::profile::Profile*> traces_set_list;
36 /** set of hosts for which one want to be notified if they ever restart */
37 inline auto& watched_hosts() // avoid static initialization order fiasco
39 static std::set<std::string, std::less<>> value;
43 static inline void double_update(double* variable, double value, double precision)
46 fprintf(stderr, "Updating %g -= %g +- %g\n", *variable, value, precision);
47 xbt_assert(value == 0.0 || value > precision);
48 // Check that precision is higher than the machine-dependent size of the mantissa. If not, brutal rounding may
49 // happen, and the precision mechanism is not active...
50 xbt_assert(FLT_RADIX == 2 && *variable < precision * exp2(DBL_MANT_DIG));
53 if (*variable < precision)
57 static inline int double_positive(double value, double precision)
59 return (value > precision);
62 static inline int double_equals(double value1, double value2, double precision)
64 return (fabs(value1 - value2) < precision);
67 /** @ingroup SURF_models
68 * @brief Initializes the CPU model with the model Cas01
70 * By default, this model uses the lazy optimization mechanism that relies on partial invalidation in LMM and a heap
71 * for lazy action update.
72 * You can change this behavior by setting the cpu/optim configuration variable to a different value.
74 * You shouldn't have to call it by yourself.
76 XBT_PUBLIC void surf_cpu_model_init_Cas01();
78 XBT_PUBLIC void surf_disk_model_init_S19();
80 /** @ingroup SURF_models
81 * @brief Same as network model 'LagrangeVelho', only with different correction factors.
83 * This model is proposed by Pierre-Nicolas Clauss and Martin Quinson and Stéphane Génaud based on the model 'LV08' and
84 * different correction factors depending on the communication size (< 1KiB, < 64KiB, >= 64KiB).
85 * See comments in the code for more information.
87 * @see surf_host_model_init_SMPI()
89 XBT_PUBLIC void surf_network_model_init_SMPI();
91 /** @ingroup SURF_models
92 * @brief Same as network model 'LagrangeVelho', only with different correction factors.
94 * This model implements a variant of the contention model on Infiniband networks based on
95 * the works of Jérôme Vienne : http://mescal.imag.fr/membres/jean-marc.vincent/index.html/PhD/Vienne.pdf
97 * @see surf_host_model_init_IB()
102 XBT_PUBLIC void surf_network_model_init_IB();
104 /** @ingroup SURF_models
105 * @brief Initializes the platform with the network model 'LegrandVelho'
107 * This model is proposed by Arnaud Legrand and Pedro Velho based on the results obtained with the GTNets simulator for
108 * onelink and dogbone sharing scenarios. See comments in the code for more information.
110 * @see surf_host_model_init_LegrandVelho()
112 XBT_PUBLIC void surf_network_model_init_LegrandVelho();
114 /** @ingroup SURF_models
115 * @brief Initializes the platform with the network model 'Constant'
117 * In this model, the communication time between two network cards is constant, hence no need for a routing table.
118 * This is particularly useful when simulating huge distributed algorithms where scalability is really an issue. This
119 * function is called in conjunction with surf_host_model_init_compound.
121 * @see surf_host_model_init_compound()
123 XBT_PUBLIC void surf_network_model_init_Constant();
125 /** @ingroup SURF_models
126 * @brief Initializes the platform with the network model CM02
128 * You should call this function by yourself only if you plan using surf_host_model_init_compound.
129 * See comments in the code for more information.
131 XBT_PUBLIC void surf_network_model_init_CM02();
133 /** @ingroup SURF_models
134 * @brief Initializes the platform with the network model NS3
136 * This function is called by surf_host_model_init_NS3 or by yourself only if you plan using
137 * surf_host_model_init_compound
139 * @see surf_host_model_init_NS3()
141 #if !SIMGRID_HAVE_NS3
144 XBT_PUBLIC void surf_network_model_init_NS3();
146 /** @ingroup SURF_models
147 * @brief Initializes the VM model used in the platform
149 * A VM model depends on the physical CPU model to share the resources inside the VM
150 * It will also creates the CPU model for actions running inside the VM
152 * Such model is subject to modification with warning in the ChangeLog so monitor it!
154 XBT_PUBLIC void surf_vm_model_init_HL13(simgrid::kernel::resource::CpuModel* cpu_pm_model);
156 /** @ingroup SURF_models
157 * @brief Initializes the platform with a compound host model
159 * This function should be called after a cpu_model and a network_model have been set up.
161 XBT_PUBLIC void surf_host_model_init_compound();
163 /** @ingroup SURF_models
164 * @brief Initializes the platform with the current best network and cpu models at hand
166 * This platform model separates the host model and the network model.
167 * The host model will be initialized with the model compound, the network model with the model LV08 (with cross
168 * traffic support) and the CPU model with the model Cas01.
169 * Such model is subject to modification with warning in the ChangeLog so monitor it!
171 XBT_PUBLIC void surf_host_model_init_current_default();
173 /** @ingroup SURF_models
174 * @brief Initializes the platform with the model L07
176 * With this model, only parallel tasks can be used. Resource sharing is done by identifying bottlenecks and giving an
177 * equal share of the model to each action.
179 XBT_PUBLIC void surf_host_model_init_ptask_L07();
181 /* --------------------
183 * -------------------- */
184 /** @brief Resource model description */
185 struct surf_model_description_t {
187 const char* description;
188 std::function<void()> model_init_preparse;
191 XBT_PUBLIC const surf_model_description_t* find_model_description(const std::vector<surf_model_description_t>& table,
192 const std::string& name);
193 XBT_PUBLIC void model_help(const char* category, const std::vector<surf_model_description_t>& table);
195 #define SIMGRID_REGISTER_PLUGIN(id, desc, init) \
196 static void XBT_ATTRIB_CONSTRUCTOR(800) _XBT_CONCAT3(simgrid_, id, _plugin_register)() \
198 surf_plugin_description().emplace_back(surf_model_description_t{_XBT_STRINGIFY(id), (desc), (init)}); \
201 /** @brief The list of all available plugins */
202 inline auto& surf_plugin_description() // Function to avoid static initialization order fiasco
204 static std::vector<surf_model_description_t> plugin_description_table;
205 return plugin_description_table;
207 /** @brief The list of all available optimization modes (both for cpu and networks).
208 * These optimization modes can be set using --cfg=cpu/optim:... and --cfg=network/optim:... */
209 XBT_PUBLIC_DATA const std::vector<surf_model_description_t> surf_optimization_mode_description;
210 /** @brief The list of all cpu models (pick one with --cfg=cpu/model) */
211 XBT_PUBLIC_DATA const std::vector<surf_model_description_t> surf_cpu_model_description;
212 /** @brief The list of all network models (pick one with --cfg=network/model) */
213 XBT_PUBLIC_DATA const std::vector<surf_model_description_t> surf_network_model_description;
214 /** @brief The list of all disk models (pick one with --cfg=disk/model) */
215 XBT_PUBLIC_DATA const std::vector<surf_model_description_t> surf_disk_model_description;
216 /** @brief The list of all host models (pick one with --cfg=host/model:) */
217 XBT_PUBLIC_DATA const std::vector<surf_model_description_t> surf_host_model_description;
219 #endif /* SURF_MODEL_H_ */