Re: [Iverilog-devel] vec4-stack branch: I just pushed some performance improvements

[Martin W. <mai...@ma...>]

Stephen Williams wrote:
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> Working on the "multiply_large" test in the ivtest test suite,
> I was able to substantially improve its performance, and I have
> pushed to the git vec4-stack branch those improvements. The
> changes suggest whole categories of performance improvements,
> so there is plenty of room for more, if you have any simple
> examples that I can performance-test with the profiler.
>
Definitely improved. For one particular test, the master branch vvp reports

  ...    45208 opcodes (1105920 bytes)
  ... 60.972 seconds, 252652.0/210984.0/2336.0 KBytes size/rss/shared

Before pulling the latest changes, the vec4-stack branch vvp reports

  ...    49735 opcodes (1204224 bytes)
  ... 114.567 seconds, 556200.0/514564.0/2364.0 KBytes size/rss/shared

After pulling the latest changes, the vec4-stack branch vvp reports

  ...    48493 opcodes (1179648 bytes)
  ... 93.482 seconds, 556204.0/514672.0/2344.0 KBytes size/rss/shared

(also note that memory use has more than doubled c.f. the master branch).

I can't share the Verilog code, but could run the profiler and send you the 
results if that would help.

Martin