This report by Jack J. Dongarra compares the performance of various computer systems in solving dense systems of linear equations, covering a wide range of machines from personal computers to supercomputers. The comparison includes approximately a hundred computers, with timing information provided for three metrics: the LINPACK benchmark for a 100x100 matrix, solving a 1000x1000 system of equations, and the theoretical peak performance. The report emphasizes that the results reflect only one specific problem area and should not be used to judge overall system performance. The data is collected over time and is subject to change as new machines are added and hardware and software improve. The report also discusses parallel processing and highly parallel computing, providing benchmarks for these areas. The software used to generate the data is available for download, and users are encouraged to verify the results by running the programs on their own machines. The report concludes with acknowledgments and references to relevant literature.This report by Jack J. Dongarra compares the performance of various computer systems in solving dense systems of linear equations, covering a wide range of machines from personal computers to supercomputers. The comparison includes approximately a hundred computers, with timing information provided for three metrics: the LINPACK benchmark for a 100x100 matrix, solving a 1000x1000 system of equations, and the theoretical peak performance. The report emphasizes that the results reflect only one specific problem area and should not be used to judge overall system performance. The data is collected over time and is subject to change as new machines are added and hardware and software improve. The report also discusses parallel processing and highly parallel computing, providing benchmarks for these areas. The software used to generate the data is available for download, and users are encouraged to verify the results by running the programs on their own machines. The report concludes with acknowledgments and references to relevant literature.