code: def all_host_infos():
      '''
          Summarize all host information.
      '''
      output = []
      output.append(["Operating system", os()])
      output.append(["CPUID information", cpu()])
      output.append(["CC information", compiler()])
      output.append(["JDK information", from_cmd("java -version")])
      output.append(["MPI information", from_cmd("mpirun -version")])
      output.append(["Scala information", from_cmd("scala -version")])
      output.append(["OpenCL headers", from_cmd(
          "find /usr/include|grep opencl.h")])
      output.append(["OpenCL libraries", from_cmd(
          "find /usr/lib/ -iname '*opencl*'")])
      output.append(["NVidia SMI", from_cmd("nvidia-smi -q")])
      output.append(["OpenCL Details", opencl()])
      return outpuf all_host_infos():
      '''
          Summarize all host information.
      '''
      output = []
      output.append(["Operating system", os()])
      output.append(["CPUID information", cpu()])
      output.append(["CC information", compiler()])
      output.append(["JDK information", from_cmd("java -version")])
      output.append(["MPI information", from_cmd("mpirun -version")])
      output.append(["Scala information", from_cmd("scala -version")])
      output.append(["OpenCL headers", from_cmd(
          "find /usr/include|grep opencl.h")])
      output.append(["OpenCL libraries", from_cmd(
          "find /usr/lib/ -iname '*opencl*'")])
      output.append(["NVidia SMI", from_cmd("nvidia-smi -q")])
      output.append(["OpenCL Details", opencl()])
      return output
docs: Summarize all host information.