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36 * \brief Defines routine for reporting GPU usage.
38 * \author Mark Abraham <mark.j.abraham@gmail.com>
39 * \ingroup module_taskassignment
43 #include "reportgpuusage.h"
48 #include "gromacs/gpu_utils/gpu_utils.h"
49 #include "gromacs/utility/cstringutil.h"
50 #include "gromacs/utility/logger.h"
51 #include "gromacs/utility/stringutil.h"
52 #include "gromacs/utility/sysinfo.h"
60 /*! \brief Count and return the number of unique GPUs (per node) selected.
62 * As sharing GPUs among multiple ranks is possible, the number of
63 * GPUs used (per node) can be different from the number of GPU IDs
66 size_t countUniqueGpuIdsUsed(const GpuTaskAssignments &gpuTaskAssignmentOnRanksOfThisNode)
68 std::set<int> uniqueIds;
69 for (const auto &assignmentsOnRank : gpuTaskAssignmentOnRanksOfThisNode)
71 for (const auto &assignmentOfTask : assignmentsOnRank)
73 uniqueIds.insert(assignmentOfTask.deviceId_);
76 return uniqueIds.size();
82 reportGpuUsage(const MDLogger &mdlog,
84 const GpuTaskAssignments &gpuTaskAssignmentOnRanksOfThisNode,
85 size_t numGpuTasksOnThisNode,
89 size_t numGpusInUse = countUniqueGpuIdsUsed(gpuTaskAssignmentOnRanksOfThisNode);
90 if (numGpusInUse == 0)
97 std::string gpuIdsString;
98 const char *currentSeparator = "";
99 const char *separator = ",";
100 for (const auto &assignmentsOnRank : gpuTaskAssignmentOnRanksOfThisNode)
102 if (assignmentsOnRank.empty())
104 gpuIdsString += currentSeparator;
105 gpuIdsString += "none";
106 currentSeparator = separator;
110 for (const auto &assignmentOnRank : assignmentsOnRank)
112 const char *rankType = (assignmentOnRank.task_ == GpuTask::Nonbonded ? "PP" : "PME");
113 gpuIdsString += currentSeparator;
114 gpuIdsString += formatString("%s:%d", rankType, assignmentOnRank.deviceId_);
115 currentSeparator = separator;
119 bool bPluralGpus = numGpusInUse > 1;
124 gmx_gethostname(host, STRLEN);
125 output += gmx::formatString("On host %s ", host);
127 output += gmx::formatString("%zu GPU%s %sselected for this run.\n"
128 "Mapping of GPU IDs to the %zu GPU task%s in the %zu rank%s on this node:\n %s\n",
129 numGpusInUse, bPluralGpus ? "s" : "",
130 userSetGpuIds ? "user-" : "auto-",
131 numGpuTasksOnThisNode,
132 (numGpuTasksOnThisNode > 1) ? "s" : "",
134 (numRanks > 1) ? "s" : "",
135 gpuIdsString.c_str());
138 /* NOTE: this print is only for and on one physical node */
139 GMX_LOG(mdlog.warning).appendText(output);