Measuring Communication and Computation Overlap
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Measuring Pure Communication Time
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Iallgather
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Iallgather_pure
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Iallgatherv
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Iallgatherv_pure
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Iallreduce
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Iallreduce_pure
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Ialltoall
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Ialltoall_pure
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Ialltoallv
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Ialltoallv_pure
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Ibarrier
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Ibarrier_pure
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Ibcast
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Ibcast_pure
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Igather
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Igather_pure
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Igatherv
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Igatherv_pure
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Ireduce
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Ireduce_pure
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Ireduce_scatter
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Ireduce_scatter_pure
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Iscatter
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Iscatter_pure
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Iscatterv
                                                    
                                                    
                                                
                                                    
                                                    
                                                        Iscatterv_pure
                                                    
                                                    
                                                
                                            
                                        Benchmark Methodology
This section describes:
- Different ways to manage Intel(R) MPI Benchmarks control flow 
- Command-line syntax for running the benchmarks 
- Sample output data from Intel(R) MPI Benchmarks 
- Control Flow
- Command-line Control 
    - Benchmark Selection Arguments
- -npmin Option
- -multi Option
- -off_cache cache_size[,cache_line_size] Option
- -iter Option
- -iter_policy Option
- -time Option
- -mem Option
- -input <File> Option
- -msglen <File> Option
- -map PxQ Option
- -include [[benchmark1] benchmark2 …]
- -exclude [[benchmark1] benchmark2 …]
- -msglog [<minlog>:]<maxlog>
- -thread_level Option
- -sync Option
- -imb_barrier Option
- -root_shift Option
- -data_type Option
- -red_data_type Option
- -contig_type Option
- -zero_size Option
- -mem_alloc_type Option
 
- Command-Line Control for IMB-P2P Benchmarks
- Command-Line Control for IMB-MT Benchmarks
- Parameters Controlling Intel(R) MPI Benchmarks
- Hard-Coded Settings
- Checking Results
- Output