===============================================================
General Matrix Matrix Product (GEMM): Simple Cache Optimization         [TOC]
===============================================================

---- SHELL (path=session15/, hide) ---------------------------------------------
rm -rf gemm
mkdir gemm
--------------------------------------------------------------------------------

Needed Material
===============

For this ecercise we need:

- The test program `test_dgemm.c`.  You can copy it from
  `/home/numerik/pub/hpc/ss18/ulmblas/`:

  ---- SHELL (path=session15/gemm) ---------------------------------------------
  cp /home/numerik/pub/hpc/ss18/ulmblas/test_dgemm.c .
  ------------------------------------------------------------------------------

- The auxiliary functions declared in `ulmaux.h` and defined in `ulmaux.c`:

  ---- SHELL (path=session15/gemm) ---------------------------------------------
  cp /home/numerik/pub/hpc/ss18/ulmblas/ulmaux.* .
  ------------------------------------------------------------------------------

- The header file `ulmblas.h`:

  ---- SHELL (path=session15/gemm) ---------------------------------------------
  cp /home/numerik/pub/hpc/ss18/ulmblas/ulmblas.h .
  ------------------------------------------------------------------------------

- The *incomplete* implementation `ulmblas.c` in
  `/home/numerik/pub/hpc/ss18/ulmblas/session15a`:

  ---- SHELL (path=session15/gemm) ---------------------------------------------
  cp /home/numerik/pub/hpc/ss18/ulmblas/session15a/ulmblas.c .
  ------------------------------------------------------------------------------

Exercise
========
- Implement in `ulmblas.c` function `dgemm`.  Use the simple cache optimzation
  introduced in the lecture.
- Check your implementation by running `test_dgemm check`.
- Benchmark different case of storage orders.  For example, run

  - `test_dgemm bench colmajorA colmajorB colmajorC`
  - `test_dgemm bench rowmajorA colmajorB colmajorC`
  - `test_dgemm bench rowmajorA rowmajorB colmajorC`
  - ...