[backend-opencl]

Parameterises the OpenCL backend with

1. platform-id — for selecting platform id:

   int | string

2. device-type — for selecting what type of device(s) to run on:

   all | cpu | gpu | accelerator

3. device-id — for selecting which device(s) to run on:

   int | string | local-rank | uuid

4. gimmik-max-nnz — cutoff for GiMMiK in terms of the number of non-zero entires in a constant matrix, defaults to 2048:

   int

5. gimmik-nkerns — number of kernel algorithms to try when benchmarking, defaults to 8:

   int

6. gimmik-nbench — number of benchmarking runs for each kernel, defaults to 5:

   int

Example:

[backend-opencl]
platform-id = 0
device-type = gpu
device-id = local-rank
gimmik-max-nnz = 512