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RadioObservatory
LOFAR
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5e8c7d7c
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5e8c7d7c
authored
15 years ago
by
Rob van Nieuwpoort
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Bug 1198: intro
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@@ -1529,7 +1529,6 @@ doc/papers/2010/SPM/figures/performance-graph-v2.pdf -text
doc/papers/2010/SPM/figures/performance-graph-v2.svg -text
doc/papers/2010/SPM/figures/processing-overview.pdf -text
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doc/papers/2010/SPM/outline.txt -text
doc/papers/2010/SPM/spconf.sty -text
doc/papers/2010/SPM/spm.bib -text
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pas je algorithmen aan op many-cores
1) zoek parallelisme in je algorithme.
vaak aanwezig. Zoek onafhankelijke operaties:
voorbeelden:
- correlator: kanalen, polatisaties, subbanden zijn onafhankelijk.
- polyphase: stations zijn onafhankelijk
- imaging: maak parallelisme: beeld elk kanaal af op een image, tel deze later op
2) mem bw/ops neemt af met many cores
optimaliseer.
dus optimaliseren:
- algo specifiek (reduceer mem loads)
- architectuur-specifieke optimalisaties (cache gedrag, delays, floating point instructions)
manycores ondersteunen complex niet erg goed. Alleen BG/P wel.
Vaal in aparte arrays stoppen.
---------------------------
- into
- modern astronomy
- LOFAR, SKA
- correlator algorithme zelf
- many cores algemeen
- optimaliseren van het algorithme: tiles, etc
- info per many core arch
- architectuur specifieke optimalisaties + performance
- programmeerbaarheid
- conclusies
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