andrewflash/in4342_embedded-systems_laboratory

IN4342 Embedded Systems Laboratory Course

in4342_embedded-systems_laboratory's Issues

[Assig 2] Task List

Week 4

Baseline

• Modify makefile in baseline code to be able to run mcprof
• Add ifdef MCPROF in canny_edge.c to easily switch between profiling in PC and compiling to ARM
• Add floating point support in source code and compiler options (vfp option)
• Do profiling using mcprof (PC - to see predominant functions that preferably selected to be optimized), gprof (PC and ARM), and timing info echoed from board
• Do profiling for each of the pictures (both using vfp and without). Remember, there are 3 pictures in this assignment. Use makefile to configure.
• Profiling analysis

Optimization / Profiling Result

• good resource to understand basic of gaussian blur (pretty much we will be doing the optimization here)

http://www.pixelstech.net/article/1353768112-Gaussian-Blur-Algorithm
https://www.youtube.com/watch?v=C_zFhWdM4ic

Pool Notify

• Learn pool_notify application from example code
• Sending and receiving pgm picture between ARM and DSP using sample code, i.e. pool_notify
  https://pixhawk.ethz.ch/tutorials/omap/dsplink_api

DSP calculation

• Implement gaussian on DSP
• Floating point operation to fixed point operation conversion, good article to start:
  http://www.eetindia.co.in/ARTICLES/1998APR/PDF/EEIOL_1998APR03_EMS_TA.pdf?SOURCES=DOWNLOAD

Neon

• Learn how to implement Neon code from example (using intrinsic or maybe assembler, auto-vectorization did not affect the computation significantly) source: http://processors.wiki.ti.com/index.php/Cortex-A8
• Convert the gaussian smoothing to neon instruction (manipulate sequential addition and multiplication to parallel operation)
• Convert it to fixed point operation
• Check for variation Q-format
• Compare the result (pixel error) with baseline result

Report

• Introduction
• Problem statement

Week 5

Integration

• pool notify + DSP + Neon (load sharing)
• Verification

Week 6

Week 7

Integration

• Sending rows and cols info from GPP to DSP in one NOTIFY message (Uint32)
• Load sharing implementation (first try to split data into two parts)

DSP

Week 8

deadline 3 June