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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/ewald/pme.h"
49 #include "gromacs/gpu_utils/gpu_utils.h"
50 #include "gromacs/taskassignment/taskassignment.h"
51 #include "gromacs/utility/arrayref.h"
52 #include "gromacs/utility/cstringutil.h"
53 #include "gromacs/utility/logger.h"
54 #include "gromacs/utility/stringutil.h"
55 #include "gromacs/utility/sysinfo.h"
63 /*! \brief Count and return the number of unique GPUs (per node) selected.
65 * As sharing GPUs among multiple ranks is possible, the number of
66 * GPUs used (per node) can be different from the number of GPU IDs
69 size_t countUniqueGpuIdsUsed(ArrayRef
<const GpuTaskAssignment
> gpuTaskAssignmentOnRanksOfThisNode
)
71 std::set
<int> uniqueIds
;
72 for (const auto& assignmentsOnRank
: gpuTaskAssignmentOnRanksOfThisNode
)
74 for (const auto& assignmentOfTask
: assignmentsOnRank
)
76 uniqueIds
.insert(assignmentOfTask
.deviceId_
);
79 return uniqueIds
.size();
84 void reportGpuUsage(const MDLogger
& mdlog
,
85 ArrayRef
<const GpuTaskAssignment
> gpuTaskAssignmentOnRanksOfThisNode
,
86 size_t numGpuTasksOnThisNode
,
90 PmeRunMode pmeRunMode
)
92 size_t numGpusInUse
= countUniqueGpuIdsUsed(gpuTaskAssignmentOnRanksOfThisNode
);
93 if (numGpusInUse
== 0)
100 std::string gpuIdsString
;
101 const char* currentSeparator
= "";
102 const char* separator
= ",";
103 for (const auto& assignmentsOnRank
: gpuTaskAssignmentOnRanksOfThisNode
)
105 if (assignmentsOnRank
.empty())
107 gpuIdsString
+= currentSeparator
;
108 gpuIdsString
+= "none";
109 currentSeparator
= separator
;
113 for (const auto& assignmentOnRank
: assignmentsOnRank
)
115 const char* rankType
= (assignmentOnRank
.task_
== GpuTask::Nonbonded
? "PP" : "PME");
116 gpuIdsString
+= currentSeparator
;
117 gpuIdsString
+= formatString("%s:%d", rankType
, assignmentOnRank
.deviceId_
);
118 currentSeparator
= separator
;
122 bool bPluralGpus
= numGpusInUse
> 1;
127 gmx_gethostname(host
, STRLEN
);
128 output
+= gmx::formatString("On host %s ", host
);
130 output
+= gmx::formatString(
131 "%zu GPU%s selected for this run.\n"
132 "Mapping of GPU IDs to the %zu GPU task%s in the %zu rank%s on this node:\n %s\n",
133 numGpusInUse
, bPluralGpus
? "s" : "", numGpuTasksOnThisNode
,
134 (numGpuTasksOnThisNode
> 1) ? "s" : "", numRanks
, (numRanks
> 1) ? "s" : "",
135 gpuIdsString
.c_str());
136 // Because there is a GPU in use, there must be a PP task on a GPU.
137 output
+= gmx::formatString(
138 "PP tasks will do (non-perturbed) short-ranged%s interactions on the GPU\n",
139 useGpuForBonded
? " and most bonded" : "");
140 if (pmeRunMode
== PmeRunMode::Mixed
)
142 output
+= gmx::formatString("PME tasks will do only spread and gather on the GPU\n");
144 else if (pmeRunMode
== PmeRunMode::GPU
)
146 output
+= gmx::formatString("PME tasks will do all aspects on the GPU\n");
150 /* NOTE: this print is only for and on one physical node */
151 GMX_LOG(mdlog
.warning
).appendText(output
);