straylight | European Space Agency , achieving significant speedups | GPU library

by ttsiodras C++ Version: Current License: Non-SPDX

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kandi X-RAY | straylight Summary

straylight is a C++ library typically used in Hardware, GPU, Example Codes applications. straylight has no bugs, it has no vulnerabilities and it has low support. However straylight has a Non-SPDX License. You can download it from GitHub.

Note: complete blog post about this [is here] This is the software I developed for Task 2.2 of the "TASTE Maintenance and Evolutions" project of the European Space Agency. It is a port of the IDL implementation of the StrayLight algorithm to C, and it utilizes OpenMP, Eigen and CUDA to achieve much better speeds than the original IDL code (execution time in gdl: 18 seconds - execution time of my C code: 169 ms).

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straylight has a low active ecosystem.

It has 17 star(s) with 3 fork(s). There are 4 watchers for this library.

It had no major release in the last 6 months.

There are 0 open issues and 1 have been closed. There are no pull requests.

It has a neutral sentiment in the developer community.

The latest version of straylight is current.

Quality

straylight has 0 bugs and 0 code smells.

Security

straylight has no vulnerabilities reported, and its dependent libraries have no vulnerabilities reported.

straylight code analysis shows 0 unresolved vulnerabilities.

There are 0 security hotspots that need review.

License

straylight has a Non-SPDX License.

Non-SPDX licenses can be open source with a non SPDX compliant license, or non open source licenses, and you need to review them closely before use.

Reuse

straylight releases are not available. You will need to build from source code and install.

Installation instructions are not available. Examples and code snippets are available.

It has 68 lines of code, 1 functions and 3 files.

It has low code complexity. Code complexity directly impacts maintainability of the code.

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straylight Key Features

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straylight Examples and Code Snippets

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Community Discussions

Trending Discussions on straylight

Find shortest distance, while visiting every node exactly once

QUESTION

Find shortest distance, while visiting every node exactly once

Asked 2020-Sep-01 at 22:56

For practicing reasons, I am working on Advent of Code 2015, and I am stuck at day 9. The goal is to find the shortest distance, while visiting every location within the graph exactly once. Every point is directly connected to each other and the end point must be different from the starting point. I have formulated a solution, but the final value is not correct, and I am not seeing the underlying problem.

First, I create a graph object with the locations and the distances. Then I collect every permutation of the locations into a list, and then I find and summarize the distances for each permutation. Finally, I print out the minimum distance value, which is the solution to the exercise.

The code:

...

ANSWER

Answered 2020-Sep-01 at 22:56

I have found the error thanks to Setonix's comment! Turns out, the approach is working (it is most probably nowhere near a nice implementation of TSP, as mentioned by Mark Ransom, but it is functional nonetheless!), I was only careless, when defining the set of locations.

I have assumed that every location is present at least once in the beginning of the instruction strings. However, one location ("Arbre") was only present at the end of the instructions. Therefore, the graph was incomplete, hence the wrong outputs.

As a quick fix, I have modified the code in the following way:

Source https://stackoverflow.com/questions/63691213

Community Discussions, Code Snippets contain sources that include Stack Exchange Network

Vulnerabilities

No vulnerabilities reported

Install straylight

You can download it from GitHub.

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I wrote extensive documentation of the optimizations I performed to achieve these speedups [inside the deliverable in the doc/ folder](https://github.com/ttsiodras/straylight/raw/master/doc/finalReport.pdf).

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