| 402 | | * [https://pm.bsc.es/ftp/ompss-2/doc/examples/local/sphinx/02-examples.html] |
| 403 | | * [https://en.wikipedia.org/wiki/Matrix_multiplication_algorithm] |
| 404 | | |
| 405 | | |
| 406 | | ---- |
| | 404 | * [https://en.wikipedia.org/wiki/N-body_simulation] |
| | 405 | |
| | 406 | |
| | 407 | ---- |
| | 408 | |
| | 409 | |
| | 410 | = heat benchmark (MPI+OmpSs-2+TAMPI) = |
| | 411 | |
| | 412 | Users must clone/download this example's repository from [https://pm.bsc.es/gitlab/ompss-2/examples/heat] and transfer it to a DEEP working directory. |
| | 413 | |
| | 414 | == Description == |
| | 415 | |
| | 416 | This benchmark uses an iterative Gauss-Seidel method to solve the heat equation, |
| | 417 | which is a parabolic partial differential equation that describes the distribution of heat (or variation in temperature) in a given region over time. The heat equation is of fundamental importance in a wide range of science fields. In |
| | 418 | mathematics, it is the parabolic partial differential equation par excellence. In statistics, it is related to the study of the Brownian motion. Also, the diffusion equation is a generic version of the heat equation, and it is related to the study of chemical diffusion processes. |
| | 419 | |
| | 420 | There are **9 implementations** of this benchmark which are compiled in different |
| | 421 | binaries by executing the command `make`. |
| | 422 | |
| | 423 | The interoperability versions (MPI+OmpSs-2+TAMPI) are compiled only if the environment variable `TAMPI_HOME` is set to the Task-Aware MPI (TAMPI) library's installation directory. |
| | 424 | |
| | 425 | == Execution instructions == |
| | 426 | |
| | 427 | The binaries accept several options. The most relevant options are the size |
| | 428 | of the matrix in each dimension (`-s`) and the number of timesteps (`-t`). More options can be seen with the `-h` option. An example of execution |
| | 429 | could be: |
| | 430 | |
| | 431 | `mpiexec -n 4 -bind-to hwthread:16 ./heat -t 150 -s 8192` |
| | 432 | |
| | 433 | in which the application will perform 150 timesteps in 4 MPI processes with 16 |
| | 434 | hardware threads in each process (used by the OmpSs-2 runtime). The size of the |
| | 435 | matrix in each dimension will be 8192 (8192^2^ elements in total), this means |
| | 436 | that each process will have 2048x8192 elements (16 blocks per process). |
| | 437 | |
| | 438 | == References == |
| | 439 | |
| | 440 | * [https://pm.bsc.es/gitlab/ompss-2/examples/heat] |
| | 441 | * [https://pm.bsc.es/ftp/ompss-2/doc/examples/local/sphinx/04-mpi+ompss-2.html] |
| | 442 | * [https://en.wikipedia.org/wiki/Heat_equation] |
| | 443 | |
| | 444 | ---- |
| | 445 | |
| | 446 | = krist benchmark (OmpSs-2+CUDA) = |
| | 447 | |
| | 448 | Users must clone/download this example's repository from [https://pm.bsc.es/gitlab/ompss-2/examples/krist] and transfer it to a DEEP working directory. |
| | 449 | |
| | 450 | == Description == |
| | 451 | |
| | 452 | This benchmark represents the krist kernel, which is used on crystallography to find the exact shape of a molecule using Rntgen diffraction on single crystals or powders. |
| | 453 | |
| | 454 | There are **2 implementations** of this benchmark, ''krist'' and ''krist-unified'' using regular and unified CUDA memory, repectively. |
| | 455 | |
| | 456 | == Execution instructions == |
| | 457 | |
| | 458 | `./krist N_A N_R` |
| | 459 | |
| | 460 | where: |
| | 461 | * `N_A` is the number of atoms (1000 by default). |
| | 462 | * `N_R` is the umber of reflections (10000 by default). |
| | 463 | |
| | 464 | == References == |
| | 465 | |
| | 466 | * [https://pm.bsc.es/gitlab/ompss-2/examples/krist] |
