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Record W2170949421 · doi:10.1109/ipdps.2008.4536144

A Hybrid MPI design using SCTP and iWARP

2008· article· en· W2170949421 on OpenAlex

Why this work is in the frame

A frame that forgets how it found something cannot be audited. These are the routes that admitted this work.

affAt least one author lists a Canadian institution in the pinned OpenAlex snapshot.

Bibliographic record

VenueProceedings - IEEE International Parallel and Distributed Processing Symposium · 2008
Typearticle
Languageen
FieldEngineering
TopicIPv6, Mobility, Handover, Networks, Security
Canadian institutionsUniversity of British Columbia
Fundersnot available
KeywordsStream Control Transmission ProtocolComputer scienceRemote direct memory accessMiddleware (distributed applications)Protocol stackComputer networkImplementationProtocol (science)Operating systemExploitInfiniBandStack (abstract data type)

Abstract

fetched live from OpenAlex

Remote direct memory access (RDMA) and point- to-point network fabrics both have their own advantages. MPI middleware implementations typically use one or the other, however, the appearance of the Internet Wide Area RDMA Protocol (iWARP), RDMA over IP, and protocol off-load devices introduces the opportunity to use a hybrid design for MPI middleware that uses both iWARP and a transport protocol directly. We explore the design of a new MPICH2 channel device based on iWARP and the stream control transmission protocol (SCTP) that uses SCTP for all point-to-point MPI routines and iWARP for all remote memory access routines (i.e., one-sided communication). The design extends the Ohio Supercomputer Center software- based iWARP stack and our MPICH2 SCTP-based channel device. The hybrid channel device aligns the semantics of the MPI routine with the underlying protocol that best supports the routine and also allows the MPI API to exploit the potential performance benefits of the underlying hardware more directly. We describe the design and issues related to the progress engine design and connection setup. We demonstrate how to implement iWARP over SCTP rather than TCP and discuss its advantages and disadvantages. We are not aware of any other software implementations of iWARP over SCTP, nor MPI middleware that uses both iWARP verbs and the SCTP API.

Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.

Full frame distilled prediction

Teacher imitation

Not calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.

metaresearch head score (Codex)0.000
metaresearch head score (Gemma)0.000
Version: codex-gemma-dda1882f352aValidation status: machine_predicted_unvalidated
Candidate categoriesMeta-epidemiology (narrow)
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: Simulation or modeling
GenreCandidate signal: Empirical · Consensus signal: Empirical
Teacher disagreement score0.484
Threshold uncertainty score1.000

Codex and Gemma teacher scores by category

CategoryCodexGemma
Metaresearch0.0000.000
Meta-epidemiology (narrow)0.0000.000
Meta-epidemiology (broad)0.0000.000
Bibliometrics0.0000.000
Science and technology studies0.0000.000
Scholarly communication0.0000.001
Open science0.0000.000
Research integrity0.0000.000
Insufficient payload (model declined to judge)0.0000.000

Machine scores (provisional)

The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.

Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.

Opus teacher head0.029
GPT teacher head0.243
Teacher spread0.214 · how far apart the two teachers sit on this one work
Validation statusscore_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from it