PA1: SIMD and MPI Programming

Due time: Wed 1/28 11:59pm. Late submission: Friday 1/30 11:59pm
This is a group assignment with at most 2 persons per group. Please see the grading policy.

Detailed description

Part 1 MPI

• Download this tar ball to start. It contains Makefile, and a set of c template code. The Makefile shows how to compile and run tests on Expanse.
• To debug in a local machine, use a pre-installed Open-MPI package (or install by youself) in your CSIL account. A sample Makefile for CSIL is here.

  To compile on a CSIL machine, type "make -f Makefile-CSIL".

  To test the tree sum code, type "make -f Makefile-CSIL run-treesum_test_mpi".

  To test the iterative matrix multiplication code, type "make -f Makefile-CSIL run-itmv_mult_test_mpi".

• Before running your code on Expanse, make sure it works on a CSIL machine or a local computer.
  • The instruction to obtain an Expanse account and CPU allocation was posted in Piazza. You must act now if you have not done as it may take some time to set up accounts properly.
  • Information on how to run MPI on Expanse.

Submission Instructions. Submit your MPI code and README.txt report to GradeScope which allows a quick grading feedback.

• GradeScope submission: submit under "PA1 MPI".

• Files to submit: itmv_mult_mpi.c, itmv_mult_test_mpi.c, treesum_test_mpi.c, treesum_mpi.c, README.txt

  You must mark your submission as a group submission and specify your partner name. Only one student submits from your group. Also you should directly submit these files without using a subdirectory. If you put them under a subdirectory and submit that directory, our script may not find these files.

  The grading script on GradeScope first compiles your submitted treesum_mpi.c/itmv_mult_mpi.c and our own test code to run the tests. Then it compiles treesum_test_mpi.c/itmv_mult_test_mpi.c, and our own solution to run the tests. Our current grading script still cannot grade in your test code automatically and the TA or reader will review when grading.

  This grading script limits your submission at most once every 20 minutes to avoid overloading GradeScope servers.

  If your code passes all autograding tests, you will obtain most of points. We will check your code and report, and give the final points.

  README.txt has this format:

  Last name of Student 1:
First name of Student 1:
Email of Student 1:
Last name of Student 2:
First name of Student 2:
Email of Student 2:

Report for Question 2.a

Report for Question 2.b


Part 2 SIMD

• Download this tar ball to start. It contains Makefile, and startup code files.
• The Makefile shows how to compile and run tests on Expanse. To compile on Expanse, you need to pre-load gcc compiler with "module load gcc/7.2.0"
• The code and Makefile can work on a CSIL machine.
• To test, use binary simd_test compiled with -O flag and simd_test3 with -O3.

Submission Instructions

• Submit under "PA1 SIMD" on GradeScope.

• Files to submit: simd_sum.c, README.txt

  README.txt contains your report to list the time and GFLOPS of the code compiled with -O and -O3, seperately. Answer the raised qustions described in detailed assignment description.