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Instructions (delete me)
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========================
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This is due **INSTRUCTOR TODO**.
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This is due Sunday, September 13 at midnight.
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**Summary:** In this project, you'll implement GPU stream compaction in CUDA,
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from scratch. This algorithm is widely used, and will be important for
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* The [slides on Parallel Algorithms](https://github.com/CIS565-Fall-2015/cis565-fall-2015.github.io/raw/master/lectures/2-Parallel-Algorithms.pptx)
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for Scan, Stream Compaction, and Work-Efficient Parallel Scan.
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* [GPU Gems 3, Chapter 39](http://http.developer.nvidia.com/GPUGems3/gpugems3_ch39.html).
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* GPU Gems 3, Chapter 39 - [Parallel Prefix Sum (Scan) with CUDA](http://http.developer.nvidia.com/GPUGems3/gpugems3_ch39.html).
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Your GPU stream compaction implementation will live inside of the
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`stream_compaction` subproject. This way, you will be able to easily copy it
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the `scan` function.
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* `StreamCompaction::CPU::compactWithScan`: stream compaction using the `scan`
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function. Map the input array to an array of 0s and 1s, scan it, and use
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Scatter to produce the output. You will need a **CPU** Scatter implementation
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scatter to produce the output. You will need a **CPU** scatter implementation
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for this (see slides or GPU Gems chapter for an explanation).
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These implementations should only be a few lines long.
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`StreamCompaction::Efficient::compact`
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This is equivalent to the "Work-Efficient Parallel Scan" from the slides and
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*GPU Gems 3* section 39.2.2. You will need to implement the Scatter algorithm
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*GPU Gems 3* section 39.2.2. You will need to implement the scatter algorithm
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presented in the slides and the GPU Gems chapter.
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In `stream_compaction/common.cu`, implement these for use in `compact`:
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1. Open a GitHub pull request so that we can see that you have finished.
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The title should be "Submission: YOUR NAME".
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2. Send an email to the TA (gmail: kainino1+cis565@) with:
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* **Subject**: in the form of `[CIS565] Project 0: PENNKEY`
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* **Subject**: in the form of `[CIS565] Project 2: PENNKEY`
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* Direct link to your pull request on GitHub
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* In the form of a grade (0-100+) with comments, evaluate your own
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performance on the project.

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