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Record W2148032086 · doi:10.1145/2694344.2694356

DeNovoSync

2015· article· en· W2148032086 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.

fundA Canadian funder is recorded on the work.
no affNo Canadian affiliation: this work is invisible to an affiliation-only frame.
No Canadian affiliation. An affiliation-only frame, the usual design, would never have seen this work. It is one of the works that make the case for inverting the frame.

Bibliographic record

Venuenot available
Typearticle
Languageen
FieldComputer Science
TopicParallel Computing and Optimization Techniques
Canadian institutionsnot available
FundersMinistère de l'Économie, de la Science et de l'Innovation - QuébecNational Science Foundation
KeywordsComputer scienceSynchronization (alternating current)ExploitCache coherenceCacheProtocol (science)Embedded systemCoherence (philosophical gambling strategy)Parallel computingComputer networkCPU cacheComputer securityChannel (broadcasting)

Abstract

fetched live from OpenAlex

Current shared-memory hardware is complex and inefficient. Prior work on the DeNovo coherence protocol showed that disciplined shared-memory programming models can enable more complexity-, performance-, and energy-efficient hardware than the state-of-the-art MESI protocol. DeNovo, however, severely restricted the synchronization constructs an application can support. This paper proposes DeNovoSync, a technique to support arbitrary synchronization in DeNovo. The key challenge is that DeNovo exploits race-freedom to use reader-initiated local self-invalidations (instead of conventional writer-initiated remote cache invalidations) to ensure coherence. Synchronization accesses are inherently racy and not directly amenable to self-invalidations. DeNovoSync addresses this challenge using a novel combination of registration of all synchronization reads with a judicious hardware backoff to limit unnecessary registrations. For a wide variety of synchronization constructs and applications, compared to MESI, DeNovoSync shows comparable or up to 22% lower execution time and up to 58% lower network traffic, enabling DeNovo's advantages for a much broader class of software than previously possible.

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 categoriesnone
Consensus categoriesnone
DomainCandidate signal: none · Consensus signal: none
Study designCandidate signal: Simulation or modeling · Consensus signal: none
GenreCandidate signal: Methods · Consensus signal: Methods
Teacher disagreement score0.881
Threshold uncertainty score0.147

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 communication0.0000.000
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 head0.040
GPT teacher head0.275
Teacher spread0.235 · 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