| 1. Identity statement | |
| Reference Type | Conference Paper (Conference Proceedings) |
| Site | mtc-m16.sid.inpe.br |
| Holder Code | isadg {BR SPINPE} ibi 8JMKD3MGPCW/3DT298S |
| Repository | sid.inpe.br/marciana/2004/03.15.16.37 |
| Last Update | 2004:04.01.03.00.00 (UTC) administrator |
| Metadata Repository | sid.inpe.br/marciana/2004/03.15.16.37.42 |
| Metadata Last Update | 2018:06.05.01.20.52 (UTC) administrator |
| Secondary Key | INPE-10535-PRE/6007 |
| Citation Key | SoutoCampStepChal:2003:PeAnRa |
| Title | Performance analysis of radiative transfer algorithms in a parallel environment  |
| Format | On-line |
| Project | Processamento de alto desempenho |
| Year | 2003 |
| Access Date | 2024, Dec. 26 |
| Secondary Type | PRE CI |
| 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) |
| Conference Name | International Conference on Transport Theory, 18 (ICTT). |
| Conference Location | Rio de Janeiro |
| Date | 20-25 july |
| Publisher | INPE |
| Pages | 69-75 |
| Book Title | Proceedings |
| History (UTC) | 2006-11-09 18:34:55 :: administrator -> marciana :: 2008-02-18 16:42:41 :: marciana -> administrator :: 2018-06-05 01:20:52 :: administrator -> marciana :: 2003 |
| 3. Content and structure | |
| Is the master or a copy? | is the master |
| Content Stage | completed |
| Transferable | 1 |
| 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 | |
| data URL | http://urlib.net/ibi/sid.inpe.br/marciana/2004/03.15.16.37 |
| zipped data URL | http://urlib.net/zip/sid.inpe.br/marciana/2004/03.15.16.37 |
| Language | en |
| Target File | 18ictt-a.pdf |
| User Group | administrator marciana |
| Visibility | shown |
| Copy Holder | SID/SCD |
| Read Permission | allow from all |
| 5. Allied materials | |
| Next Higher Units | 8JMKD3MGPCW/3ESGTTP |
| Citing Item List | sid.inpe.br/mtc-m21/2012/07.13.14.49.40 8 sid.inpe.br/mtc-m21/2012/07.13.14.45.49 2 sid.inpe.br/mtc-m21/2012/07.13.15.00.38 2 |
| Host Collection | sid.inpe.br/banon/2003/08.15.17.40 |
| 6. Notes | |
| Empty Fields | archivingpolicy archivist callnumber contenttype copyright creatorhistory descriptionlevel dissemination documentstage doi e-mailaddress edition editor electronicmailaddress identifier isbn issn label lineage mark mirrorrepository nextedition notes numberofvolumes orcid organization parameterlist parentrepositories previousedition previouslowerunit progress publisheraddress readergroup rightsholder schedulinginformation secondarydate secondarymark serieseditor session shorttitle sponsor subject tertiarymark tertiarytype type url versiontype volume |
| 7. Description control | |
| e-Mail (login) | marciana |
| update | |