1 /* Copyright (c) 2016-2022. The SimGrid Team.
2 * All rights reserved. */
4 /* This program is free software; you can redistribute it and/or modify it
5 * under the terms of the license (GNU LGPL) which comes with this package. */
7 #include "smpi_utils.hpp"
10 #include "smpi_config.hpp"
11 #include "src/surf/xml/platf.hpp"
12 #include "xbt/file.hpp"
15 #include "xbt/parse_units.hpp"
16 #include "xbt/sysdep.h"
18 #include <boost/tokenizer.hpp>
20 XBT_LOG_NEW_DEFAULT_SUBCATEGORY(smpi_utils, smpi, "Logging specific to SMPI (utils)");
22 extern std::string surf_parsed_filename;
23 extern int surf_parse_lineno;
25 namespace simgrid::smpi::utils {
27 double total_benched_time=0;
28 unsigned long total_malloc_size=0;
29 unsigned long total_shared_size=0;
30 unsigned int total_shared_calls=0;
31 struct alloc_metadata_t {
33 unsigned int numcall = 0;
38 struct current_buffer_metadata_t {
39 alloc_metadata_t alloc;
43 alloc_metadata_t max_malloc;
44 F2C* current_handle = nullptr;
45 current_buffer_metadata_t current_buffer1;
46 current_buffer_metadata_t current_buffer2;
48 std::unordered_map<const void*, alloc_metadata_t> allocs;
50 std::unordered_map<int, std::vector<std::string>> collective_calls;
52 std::vector<s_smpi_factor_t> parse_factor(const std::string& smpi_coef_string)
54 std::vector<s_smpi_factor_t> smpi_factor;
56 /** Setup the tokenizer that parses the string **/
57 using Tokenizer = boost::tokenizer<boost::char_separator<char>>;
58 boost::char_separator<char> sep(";");
59 boost::char_separator<char> factor_separator(":");
60 Tokenizer tokens(smpi_coef_string, sep);
63 * Iterate over patterns like A:B:C:D;E:F;G:H
64 * These will be broken down into:
69 for (auto token_iter = tokens.begin(); token_iter != tokens.end(); ++token_iter) {
70 XBT_DEBUG("token: %s", token_iter->c_str());
71 Tokenizer factor_values(*token_iter, factor_separator);
73 xbt_assert(factor_values.begin() != factor_values.end(), "Malformed radical for smpi factor: '%s'",
74 smpi_coef_string.c_str());
75 unsigned int iteration = 0;
76 for (auto factor_iter = factor_values.begin(); factor_iter != factor_values.end(); ++factor_iter) {
79 if (factor_iter == factor_values.begin()) { /* first element */
81 fact.factor = std::stoi(*factor_iter);
82 } catch (const std::invalid_argument&) {
83 throw std::invalid_argument(std::string("Invalid factor in chunk ") + std::to_string(smpi_factor.size() + 1) +
88 fact.values.push_back(xbt_parse_get_time(surf_parsed_filename, surf_parse_lineno, *factor_iter, ""));
89 } catch (const std::invalid_argument&) {
90 throw std::invalid_argument(std::string("Invalid factor value ") + std::to_string(iteration) + " in chunk " +
91 std::to_string(smpi_factor.size() + 1) + ": " + *factor_iter);
96 smpi_factor.push_back(fact);
97 XBT_DEBUG("smpi_factor:\t%zu: %zu values, first: %f", fact.factor, smpi_factor.size(), fact.values[0]);
99 std::sort(smpi_factor.begin(), smpi_factor.end(), [](const s_smpi_factor_t &pa, const s_smpi_factor_t &pb) {
100 return (pa.factor < pb.factor);
102 for (auto const& fact : smpi_factor) {
103 XBT_DEBUG("smpi_factor:\t%zu: %zu values, first: %f", fact.factor, smpi_factor.size(), fact.values[0]);
105 smpi_factor.shrink_to_fit();
110 void add_benched_time(double time){
111 total_benched_time += time;
114 void account_malloc_size(size_t size, std::string_view file, int line, const void* ptr)
116 if (smpi_cfg_display_alloc()) {
117 alloc_metadata_t metadata;
118 metadata.size = size;
119 metadata.line = line;
120 metadata.numcall = 1;
121 metadata.file = file;
122 allocs.try_emplace(ptr, metadata);
124 total_malloc_size += size;
125 if(size > max_malloc.size){
126 max_malloc.size = size;
127 max_malloc.line = line;
128 max_malloc.numcall = 1;
129 max_malloc.file = file;
130 } else if (size == max_malloc.size && max_malloc.line == line && max_malloc.file == file) {
131 max_malloc.numcall++;
136 void account_shared_size(size_t size){
137 if (smpi_cfg_display_alloc()) {
138 total_shared_size += size;
139 total_shared_calls++;
143 void print_time_analysis(double global_time){
144 if (simgrid::config::get_value<bool>("smpi/display-timing")) {
145 XBT_INFO("Simulated time: %g seconds. \n\n"
146 "The simulation took %g seconds (after parsing and platform setup)\n"
147 "%g seconds were actual computation of the application",
148 simgrid_get_clock(), global_time, total_benched_time);
149 if (total_benched_time/global_time>=0.75)
150 XBT_INFO("More than 75%% of the time was spent inside the application code.\n"
151 "You may want to use sampling functions or trace replay to reduce this.");
155 static void print_leaked_handles()
157 // Put the leaked non-default handles in a vector to sort them by id
158 std::vector<std::pair<unsigned int, smpi::F2C*>> handles;
159 if (simgrid::smpi::F2C::lookup() != nullptr)
160 std::copy_if(simgrid::smpi::F2C::lookup()->begin(), simgrid::smpi::F2C::lookup()->end(),
161 std::back_inserter(handles),
162 [](auto const& entry) { return entry.first >= simgrid::smpi::F2C::get_num_default_handles(); });
166 auto max = static_cast<unsigned long>(simgrid::config::get_value<int>("smpi/list-leaks"));
167 std::string message = "Probable memory leaks in your code: SMPI detected %zu unfreed MPI handles:";
169 message += "\nHINT: Display types and addresses (n max) with --cfg=smpi/list-leaks:n.\n"
170 "Running smpirun with -wrapper \"valgrind --leak-check=full\" can provide more information";
171 XBT_INFO(message.c_str(), handles.size());
175 // we cannot trust F2C::lookup()->size() > F2C::get_num_default_handles() because some default handles are already
176 // freed at this point
177 bool display_advice = false;
178 std::map<std::string, int, std::less<>> count;
179 for (const auto& [_, elem] : handles) {
180 std::string key = elem->name();
181 if ((not xbt_log_no_loc) && (not elem->call_location().empty()))
182 key += " at " + elem->call_location();
184 display_advice = true;
185 auto& result = count.try_emplace(key, 0).first->second;
189 XBT_WARN("To get more information (location of allocations), compile your code with -trace-call-location flag of "
192 for (const auto& [key, value] : count) {
194 XBT_INFO("leaked handle of type %s", key.c_str());
196 XBT_INFO("%d leaked handles of type %s", value, key.c_str());
201 if (max < count.size())
202 XBT_INFO("(%lu more handle leaks hidden as you wanted to see only %lu of them)", count.size() - max, max);
205 static void print_leaked_buffers()
210 auto max = static_cast<unsigned long>(simgrid::config::get_value<int>("smpi/list-leaks"));
211 std::string message = "Probable memory leaks in your code: SMPI detected %zu unfreed buffers:";
213 message += "display types and addresses (n max) with --cfg=smpi/list-leaks:n.\nRunning smpirun with -wrapper "
214 "\"valgrind --leak-check=full\" can provide more information";
215 XBT_INFO(message.c_str(), allocs.size());
220 // gather by allocation origin (only one group reported in case of no-loc or if trace-call-location is not used)
227 std::map<std::string, struct buff_leak, std::less<>> leaks_aggreg;
228 for (const auto& [_, elem] : allocs) {
229 std::string key = "leaked allocations";
230 if (not xbt_log_no_loc)
231 key = elem.file + ":" + std::to_string(elem.line) + ": " + key;
232 auto& result = leaks_aggreg.try_emplace(key, buff_leak{0, 0, elem.size, elem.size}).first->second;
234 result.total_size += elem.size;
235 if (elem.size > result.max_size)
236 result.max_size = elem.size;
237 else if (elem.size < result.min_size)
238 result.min_size = elem.size;
240 // now we can order by total size.
241 std::vector<std::pair<std::string, buff_leak>> leaks(leaks_aggreg.begin(), leaks_aggreg.end());
242 std::sort(leaks.begin(), leaks.end(),
243 [](auto const& a, auto const& b) { return a.second.total_size > b.second.total_size; });
246 for (const auto& [key, value] : leaks) {
247 if (value.min_size == value.max_size)
248 XBT_INFO("%s of total size %zu, called %d times, each with size %zu", key.c_str(), value.total_size, value.count,
251 XBT_INFO("%s of total size %zu, called %d times, with minimum size %zu and maximum size %zu", key.c_str(),
252 value.total_size, value.count, value.min_size, value.max_size);
257 if (max < leaks_aggreg.size())
258 XBT_INFO("(more buffer leaks hidden as you wanted to see only %lu of them)", max);
261 void print_memory_analysis()
263 if (smpi_cfg_display_alloc()) {
264 print_leaked_handles();
265 print_leaked_buffers();
267 if(total_malloc_size != 0)
268 XBT_INFO("Memory Usage: Simulated application allocated %lu bytes during its lifetime through malloc/calloc calls.\n"
269 "Largest allocation at once from a single process was %zu bytes, at %s:%d. It was called %u times during the whole simulation.\n"
270 "If this is too much, consider sharing allocations for computation buffers.\n"
271 "This can be done automatically by setting --cfg=smpi/auto-shared-malloc-thresh to the minimum size wanted size (this can alter execution if data content is necessary)\n",
272 total_malloc_size, max_malloc.size, simgrid::xbt::Path(max_malloc.file).get_base_name().c_str(), max_malloc.line, max_malloc.numcall
276 "Allocations analysis asked, but 0 bytes were allocated through malloc/calloc calls intercepted by SMPI.\n"
277 "The code may not use malloc() to allocate memory, or it was built with SMPI_NO_OVERRIDE_MALLOC");
278 if(total_shared_size != 0)
279 XBT_INFO("%lu bytes were automatically shared between processes, in %u calls\n", total_shared_size, total_shared_calls);
283 void set_current_handle(F2C* handle){
284 current_handle=handle;
287 void print_current_handle(){
289 if(current_handle->call_location().empty())
290 XBT_INFO("To get handle location information, pass -trace-call-location flag to smpicc/f90 as well");
292 XBT_INFO("Handle %s was allocated by a call at %s", current_handle->name().c_str(),
293 (char*)(current_handle->call_location().c_str()));
297 void set_current_buffer(int i, const char* name, const void* buf){
300 if(not current_buffer1.name.empty()){
301 current_buffer1.name="";
303 if(not current_buffer2.name.empty()){
304 current_buffer2.name="";
307 auto meta = allocs.find(buf);
308 if (meta == allocs.end()) {
309 XBT_DEBUG("Buffer %p was not allocated with malloc/calloc", buf);
313 current_buffer1.alloc = meta->second;
314 current_buffer1.name = name;
316 current_buffer2.alloc=meta->second;
317 current_buffer2.name=name;
321 void print_buffer_info()
323 if (not current_buffer1.name.empty())
324 XBT_INFO("Buffer %s was allocated from %s line %d, with size %zu", current_buffer1.name.c_str(),
325 current_buffer1.alloc.file.c_str(), current_buffer1.alloc.line, current_buffer1.alloc.size);
326 if (not current_buffer2.name.empty())
327 XBT_INFO("Buffer %s was allocated from %s line %d, with size %zu", current_buffer2.name.c_str(),
328 current_buffer2.alloc.file.c_str(), current_buffer2.alloc.line, current_buffer2.alloc.size);
331 size_t get_buffer_size(const void* buf){
332 auto meta = allocs.find(buf);
333 if (meta == allocs.end()) {
334 //we don't know this buffer (on stack or feature disabled), assume it's fine.
335 return std::numeric_limits<std::size_t>::max();
337 return meta->second.size;
340 void account_free(const void* ptr){
341 if (smpi_cfg_display_alloc()) {
346 int check_collectives_ordering(MPI_Comm comm, const std::string& call)
348 unsigned int count = comm->get_collectives_count();
349 comm->increment_collectives_count();
350 if (auto vec = collective_calls.find(comm->id()); vec == collective_calls.end()) {
351 collective_calls.try_emplace(comm->id(), std::vector<std::string>{call});
353 // are we the first ? add the call
354 if (vec->second.size() == count) {
355 vec->second.emplace_back(call);
356 } else if (vec->second.size() > count) {
357 if (vec->second[count] != call) {
358 XBT_WARN("Collective operation mismatch. For process %ld, expected %s, got %s",
359 simgrid::s4u::this_actor::get_pid(), vec->second[count].c_str(), call.c_str());
360 return MPI_ERR_OTHER;
368 } // namespace simgrid::smpi::utils