finalize available GPU hardware introspection functions

lib/gpu/lal_device.cpp

@@ -18,6 +18,7 @@
 #include <map>
 #include <cmath>
 #include <cstdlib>
+#include <iostream>
 #if (LAL_USE_OMP == 1)
 #include <omp.h>
 #endif
@@ -1027,12 +1028,19 @@ Device<PRECISION,ACC_PRECISION> global_device;
 
 using namespace LAMMPS_AL;
 
-bool lmp_has_device()
+bool lmp_has_gpu_device()
 {
-  auto tmpgpu = new UCL_Device();
-  int num = tmpgpu->num_platforms();
-  delete tmpgpu;
-  return num > 0;
+  UCL_Device gpu;
+  return (gpu.num_platforms() > 0);
+}
+
+std::string lmp_gpu_device_info()
+{
+  std::ostringstream out;
+  UCL_Device gpu;
+  if (gpu.num_platforms() > 0)
+    gpu.print_all(out);
+  return out.str();
 }
 
 int lmp_init_device(MPI_Comm world, MPI_Comm replica, const int ngpu,

src/info.cpp

@@ -320,7 +320,8 @@ void Info::command(int narg, char **arg)
   if (flags & ACCELERATOR) {
     fmt::print(out,"\nAccelerator configuration:\n\n{}",
                get_accelerator_info());
-    fmt::print(out,"\nGPU present: {}\n",has_gpu_device() ? "yes" : "no");
+    if (Info::has_gpu_device())
+      fmt::print(out,"\nAvailable GPU devices:\n{}\n",get_gpu_device_info());
   }
 
   if (flags & MEMORY) {
@@ -1140,17 +1141,27 @@ bool Info::has_package(const std::string &package_name) {
 
 #if defined(LMP_GPU)
 extern bool lmp_gpu_config(const std::string &, const std::string &);
-extern bool lmp_has_device();
+extern bool lmp_has_gpu_device();
+extern std::string lmp_gpu_device_info();
 
 bool Info::has_gpu_device()
 {
-  return lmp_has_device();
+  return lmp_has_gpu_device();
+}
+
+std::string Info::get_gpu_device_info()
+{
+  return lmp_gpu_device_info();
 }
 #else
 bool Info::has_gpu_device()
 {
   return false;
 }
+std::string Info::get_gpu_device_info()
+{
+  return "";
+}
 #endif
 
 #if defined(LMP_KOKKOS)

src/info.h

@@ -48,6 +48,7 @@ class Info : public Command {
                                       const std::string &,
                                       const std::string &);
   static bool has_gpu_device();
+  static std::string get_gpu_device_info();
 
   static std::string get_os_info();
   static std::string get_compiler_info();

src/lammps.cpp

@@ -1328,6 +1328,7 @@ void LAMMPS::print_config(FILE *fp)
 
   fmt::print(fp,"Accelerator configuration:\n\n{}\n",
              Info::get_accelerator_info());
+  fmt::print(fp,"GPU present: {}\n\n",Info::has_gpu_device() ? "yes" : "no");
 
   fputs("Active compile time flags:\n\n",fp);
   if (Info::has_gzip_support()) fputs("-DLAMMPS_GZIP\n",fp);