1 /* Copyright (c) 2016-2022. 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. */
6 #include "smpi_utils.hpp"
9 #include "smpi_config.hpp"
10 #include "src/surf/xml/platf.hpp"
12 #include "xbt/file.hpp"
14 #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 void add_benched_time(double time){
53 total_benched_time += time;
56 void account_malloc_size(size_t size, std::string_view file, int line, const void* ptr)
58 if (smpi_cfg_display_alloc()) {
59 alloc_metadata_t metadata;
64 allocs.try_emplace(ptr, metadata);
66 total_malloc_size += size;
67 if(size > max_malloc.size){
68 max_malloc.size = size;
69 max_malloc.line = line;
70 max_malloc.numcall = 1;
71 max_malloc.file = file;
72 } else if (size == max_malloc.size && max_malloc.line == line && max_malloc.file == file) {
78 void account_shared_size(size_t size){
79 if (smpi_cfg_display_alloc()) {
80 total_shared_size += size;
85 void print_time_analysis(double global_time){
86 if (simgrid::config::get_value<bool>("smpi/display-timing")) {
87 XBT_INFO("Simulated time: %g seconds. \n\n"
88 "The simulation took %g seconds (after parsing and platform setup)\n"
89 "%g seconds were actual computation of the application",
90 simgrid_get_clock(), global_time, total_benched_time);
91 if (total_benched_time/global_time>=0.75)
92 XBT_INFO("More than 75%% of the time was spent inside the application code.\n"
93 "You may want to use sampling functions or trace replay to reduce this.");
97 static void print_leaked_handles()
99 // Put the leaked non-default handles in a vector to sort them by id
100 std::vector<std::pair<unsigned int, smpi::F2C*>> handles;
101 if (simgrid::smpi::F2C::lookup() != nullptr)
102 std::copy_if(simgrid::smpi::F2C::lookup()->begin(), simgrid::smpi::F2C::lookup()->end(),
103 std::back_inserter(handles),
104 [](auto const& entry) { return entry.first >= simgrid::smpi::F2C::get_num_default_handles(); });
108 auto max = static_cast<unsigned long>(simgrid::config::get_value<int>("smpi/list-leaks"));
109 std::string message = "Probable memory leaks in your code: SMPI detected %zu unfreed MPI handles:";
111 message += "\nHINT: Display types and addresses (n max) with --cfg=smpi/list-leaks:n.\n"
112 "Running smpirun with -wrapper \"valgrind --leak-check=full\" can provide more information";
113 XBT_INFO(message.c_str(), handles.size());
117 // we cannot trust F2C::lookup()->size() > F2C::get_num_default_handles() because some default handles are already
118 // freed at this point
119 bool display_advice = false;
120 std::map<std::string, int, std::less<>> count;
121 for (const auto& [_, elem] : handles) {
122 std::string key = elem->name();
123 if ((not xbt_log_no_loc) && (not elem->call_location().empty()))
124 key += " at " + elem->call_location();
126 display_advice = true;
127 auto& result = count.try_emplace(key, 0).first->second;
131 XBT_WARN("To get more information (location of allocations), compile your code with -trace-call-location flag of "
134 for (const auto& [key, value] : count) {
136 XBT_INFO("leaked handle of type %s", key.c_str());
138 XBT_INFO("%d leaked handles of type %s", value, key.c_str());
143 if (max < count.size())
144 XBT_INFO("(%lu more handle leaks hidden as you wanted to see only %lu of them)", count.size() - max, max);
147 static void print_leaked_buffers()
152 auto max = static_cast<unsigned long>(simgrid::config::get_value<int>("smpi/list-leaks"));
153 std::string message = "Probable memory leaks in your code: SMPI detected %zu unfreed buffers:";
155 message += "display types and addresses (n max) with --cfg=smpi/list-leaks:n.\nRunning smpirun with -wrapper "
156 "\"valgrind --leak-check=full\" can provide more information";
157 XBT_INFO(message.c_str(), allocs.size());
162 // gather by allocation origin (only one group reported in case of no-loc or if trace-call-location is not used)
169 std::map<std::string, struct buff_leak, std::less<>> leaks_aggreg;
170 for (const auto& [_, elem] : allocs) {
171 std::string key = "leaked allocations";
172 if (not xbt_log_no_loc)
173 key = elem.file + ":" + std::to_string(elem.line) + ": " + key;
174 auto& result = leaks_aggreg.try_emplace(key, buff_leak{0, 0, elem.size, elem.size}).first->second;
176 result.total_size += elem.size;
177 if (elem.size > result.max_size)
178 result.max_size = elem.size;
179 else if (elem.size < result.min_size)
180 result.min_size = elem.size;
182 // now we can order by total size.
183 std::vector<std::pair<std::string, buff_leak>> leaks(leaks_aggreg.begin(), leaks_aggreg.end());
184 std::sort(leaks.begin(), leaks.end(),
185 [](auto const& a, auto const& b) { return a.second.total_size > b.second.total_size; });
188 for (const auto& [key, value] : leaks) {
189 if (value.min_size == value.max_size)
190 XBT_INFO("%s of total size %zu, called %d times, each with size %zu", key.c_str(), value.total_size, value.count,
193 XBT_INFO("%s of total size %zu, called %d times, with minimum size %zu and maximum size %zu", key.c_str(),
194 value.total_size, value.count, value.min_size, value.max_size);
199 if (max < leaks_aggreg.size())
200 XBT_INFO("(more buffer leaks hidden as you wanted to see only %lu of them)", max);
203 void print_memory_analysis()
205 if (smpi_cfg_display_alloc()) {
206 print_leaked_handles();
207 print_leaked_buffers();
209 if(total_malloc_size != 0)
210 XBT_INFO("Memory Usage: Simulated application allocated %lu bytes during its lifetime through malloc/calloc calls.\n"
211 "Largest allocation at once from a single process was %zu bytes, at %s:%d. It was called %u times during the whole simulation.\n"
212 "If this is too much, consider sharing allocations for computation buffers.\n"
213 "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",
214 total_malloc_size, max_malloc.size, simgrid::xbt::Path(max_malloc.file).get_base_name().c_str(), max_malloc.line, max_malloc.numcall
218 "Allocations analysis asked, but 0 bytes were allocated through malloc/calloc calls intercepted by SMPI.\n"
219 "The code may not use malloc() to allocate memory, or it was built with SMPI_NO_OVERRIDE_MALLOC");
220 if(total_shared_size != 0)
221 XBT_INFO("%lu bytes were automatically shared between processes, in %u calls\n", total_shared_size, total_shared_calls);
225 void set_current_handle(F2C* handle){
226 current_handle=handle;
229 void print_current_handle(){
231 if(current_handle->call_location().empty())
232 XBT_INFO("To get handle location information, pass -trace-call-location flag to smpicc/f90 as well");
234 XBT_INFO("Handle %s was allocated by a call at %s", current_handle->name().c_str(),
235 (char*)(current_handle->call_location().c_str()));
239 void set_current_buffer(int i, const char* name, const void* buf){
242 if(not current_buffer1.name.empty()){
243 current_buffer1.name="";
245 if(not current_buffer2.name.empty()){
246 current_buffer2.name="";
249 auto meta = allocs.find(buf);
250 if (meta == allocs.end()) {
251 XBT_DEBUG("Buffer %p was not allocated with malloc/calloc", buf);
255 current_buffer1.alloc = meta->second;
256 current_buffer1.name = name;
258 current_buffer2.alloc=meta->second;
259 current_buffer2.name=name;
263 void print_buffer_info()
265 if (not current_buffer1.name.empty())
266 XBT_INFO("Buffer %s was allocated from %s line %d, with size %zu", current_buffer1.name.c_str(),
267 current_buffer1.alloc.file.c_str(), current_buffer1.alloc.line, current_buffer1.alloc.size);
268 if (not current_buffer2.name.empty())
269 XBT_INFO("Buffer %s was allocated from %s line %d, with size %zu", current_buffer2.name.c_str(),
270 current_buffer2.alloc.file.c_str(), current_buffer2.alloc.line, current_buffer2.alloc.size);
273 size_t get_buffer_size(const void* buf){
274 auto meta = allocs.find(buf);
275 if (meta == allocs.end()) {
276 //we don't know this buffer (on stack or feature disabled), assume it's fine.
277 return std::numeric_limits<std::size_t>::max();
279 return meta->second.size;
282 void account_free(const void* ptr){
283 if (smpi_cfg_display_alloc()) {
288 int check_collectives_ordering(MPI_Comm comm, const std::string& call)
290 unsigned int count = comm->get_collectives_count();
291 comm->increment_collectives_count();
292 if (auto vec = collective_calls.find(comm->id()); vec == collective_calls.end()) {
293 collective_calls.try_emplace(comm->id(), std::vector<std::string>{call});
295 // are we the first ? add the call
296 if (vec->second.size() == count) {
297 vec->second.emplace_back(call);
298 } else if (vec->second.size() > count) {
299 if (vec->second[count] != call) {
300 XBT_WARN("Collective operation mismatch. For process %ld, expected %s, got %s",
301 simgrid::s4u::this_actor::get_pid(), vec->second[count].c_str(), call.c_str());
302 return MPI_ERR_OTHER;
310 } // namespace simgrid::smpi::utils