Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
2
datasets available to search
ShareScore release 0.9.0
Dataset results
2 results for “write allocate”
Artifact description: CloverLeaf on Intel Multi-Core CPUs: A Case Study in Write-Allocate Evasion
<p>In this paper we analyze the MPI-only version of the CloverLeaf code from the SPEChpc 2021 benchmark suite on recent Intel Xeon "Ice Lake" and "Sapphire Rapids" server CPUs. We observe peculiar breakdowns in performance when the number of processes is prime. Investigating this effect, we create first-principles data traffic models for each of the stencil-like hotspot loops. With application measurements and microbenchmarks to study memory data traffic behavior, we can connect the breakdowns to SpecI2M, a new write-allocate evasion feature in current Intel CPUs. For serial and full-node cases we are able to predict the memory data volume analytically with an error of a few percent. We find that if the number of processes is prime, SpecI2M fails to work properly, which we can attribute to short inner loops emerging from the one-dimensional domain decomposition in this case. We can also rule out other possible causes of the prime number effect, such as breaking layer conditions, MPI communication overhead, and load imbalance.</p>
Artifact description for PMBS'23 paper: Calculating Primes the Expensive Way: A Case Study in Write-Allocate Evasion on Intel Ice Lake SP
<p>The article investigates a new hardware feature introduced with the Intel Ice Lake SP microarchitecture that automatically avoids write-allocate traffic for streaming write accesses. The analysis uses the CloverLeaf benchmark code from the SPEChpc2021 suite and micro-benchmarks to assess the effectiveness. The artifact description contains scripts to make CloverLeaf a stand-alone application without the SPEC benchmarking harness and patches for code changes applied to the CloverLeaf benchmark code for the in-depth analysis. Moreover, depending on the task, there are scripts that gather data for multiple parameters, commonly thread counts.</p> <p>All data collecting scripts produce CSV files for further analysis or plotting. For reference, the CSV files with the results shown in the paper are part of the artifact description. Moreover, the artifact description contains the TeX sources to plot all figures presented in this work. They contain the transformations done to the data (scaling from GByte to Byte, etc.) before plotting.</p> <p>With a working installation of the SPEChpc2021 suite, an Intel Ice Lake SP system and applied patches from this artifact description, all benchmarks can be re-run and reproduce the data presented in this work. It is important to note that the write-allocate avoidance feature behaves differently on different Ice Lake SP chips. For a full reproduction of the shown results, one has to use systems with Intel Xeon Platinum 8360Y as well. Furthermore, for disabling certain hardware features like the hardware prefetchers, SpecI2M or other undocumented prefetchers, one needs root access to the system.</p>
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.