| 1. Identity statement | |
| Reference Type | Journal Article |
| Site | mtc-m16.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Identifier | 6qtX3pFwXQZsFDuKxG/GJ8xn |
| Repository | sid.inpe.br/marciana/2005/07.11.12.53 (restricted access) |
| Last Update | 2005:07.11.03.00.00 (UTC) administrator |
| Metadata Repository | sid.inpe.br/marciana/2005/07.11.12.53.53 |
| Metadata Last Update | 2018:06.05.01.21.36 (UTC) administrator |
| Secondary Key | INPE-12877-PRE/8167 |
| ISSN | 0041-1450 |
| Citation Key | SoutoCampStepChal:2004:PeAnRa |
| Title | Performance analysis of radiative transfer algorithms in a parallel environment  |
| Project | Processamento de alto desempenho |
| Year | 2004 |
| Access Date | 2025, May 11 |
| Secondary Type | PRE PI |
| Number of Files | 1 |
| Size | 162 KiB |
| 2. Context | |
| Author | 1 Souto, Roberto Pinto 2 Campos Velho, Haroldo Fraga de 3 Stephany, Stephan 4 Chalhoub, Ezzat Selim |
| Resume Identifier | 1 2 8JMKD3MGP5W/3C9JHC3 3 8JMKD3MGP5W/3C9JJ9D 4 8JMKD3MGP5W/3C9JH3F |
| Group | 1 LAC-INPE-MCT-BR 2 LAC-INPE-MCT-BR 3 LAC-INPE-MCT-BR 4 LAC-INPE-MCT-BR |
| Affiliation | 1 Instituto Nacional de Pesquisas Espaciais, Laboratório Associado de Computação e Matemática Aplicada, (INPE. LAC) 2 Instituto Nacional de Pesquisas Espaciais, Laboratório Associado de Computação e Matemática Aplicada, (INPE. LAC) 3 Instituto Nacional de Pesquisas Espaciais, Laboratório Associado de Computação e Matemática Aplicada, (INPE. LAC) 4 Instituto Nacional de Pesquisas Espaciais, Laboratório Associado de Computação e Matemática Aplicada, (INPE. LAC) |
| Journal | Transport Theory and Statistical Physics |
| Volume | 33 |
| Number | 5-7 |
| Pages | 449-468 |
| History (UTC) | 2006-01-20 13:28:30 :: sergio -> administrator :: 2006-09-28 22:28:58 :: administrator -> sergio :: 2008-01-07 12:54:04 :: sergio -> marciana :: 2008-02-18 16:46:07 :: marciana -> administrator :: 2018-06-05 01:21:36 :: administrator -> marciana :: 2004 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| Content Type | External Contribution |
| Keywords | COMPUTER SCIENCE Algorithms Radiative transfer equation (RTE) Hydrolight PEESNA LTSN Hydrological optics COMPUTAÇÃO APLICADA Algorítmos Equação de transferência radioativa Ótica hidrológica |
| Abstract | Three algorithms for solving the radiative transfer equation (RTE) were studied: Hydrolight, PEESNA and LTSN. These algorithms correspond, respectively, to invariant imbedding, analytical discrete-ordinates and LTSN methods. As a first step, the performance of each algorithm was evaluated running in the same sequential machine. The related codes were used in a Hydrological Optics typical coastal water test case, in order to calculate the surface-emergent radiation intensities (radiances) given the incident radiances and inherent optical properties such as the absorption and the scattering coefficients. Timing and profiling of the three codes was performed in order to evaluate processing times and to identify performance bottlenecks. Next, each algorithm was studied concerning the feasibility of its parallelization using the MPI message passing communication library and execution in a distributed memory machine, a multicomputer based on IA-32 architecture. The three codes perform spatial discretization of the domain and Fourier decomposition of the radiances obtaining independent azimuthal modes. Therefore, an independent RTE can be written for each azimuthal mode and can be assigned to a different processor, in a parallel implementation. The speed-up that can be achieved increases with the fraction of time spent in the azimuthal mode, but total execution time is also an important issue. Results are discussed and further strategies are proposed. |
| Area | COMP |
| Arrangement | urlib.net > BDMCI > Fonds > Produção anterior à 2021 > LABAC > Performance analysis of... |
| doc Directory Content | access |
| source Directory Content | there are no files |
| agreement Directory Content | there are no files |
| 4. Conditions of access and use | |
| Language | en |
| Target File | performance analysis.pdf |
| User Group | administrator marciana sergio |
| Visibility | shown |
| Copy Holder | SID/SCD |
| Archiving Policy | denypublisher denyfinaldraft12 |
| Read Permission | deny from all and allow from 150.163 |
| 5. Allied materials | |
| Next Higher Units | 8JMKD3MGPCW/3ESGTTP |
| Dissemination | WEBSCI |
| Host Collection | sid.inpe.br/banon/2003/08.15.17.40 |
| 6. Notes | |
| Empty Fields | alternatejournal archivist callnumber copyright creatorhistory descriptionlevel documentstage doi e-mailaddress electronicmailaddress format isbn label lineage mark mirrorrepository month nextedition notes orcid parameterlist parentrepositories previousedition previouslowerunit progress readergroup rightsholder schedulinginformation secondarydate secondarymark session shorttitle sponsor subject tertiarymark tertiarytype typeofwork url versiontype |
| 7. Description control | |
| e-Mail (login) | marciana |
| update | |