Re: [Iverilog-devel] More vec4-stack progress

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

Memory use is reported by 'vvp -v'. With the master branch, I get

Compiling VVP ...
  ... VVP file version 0.10.0 (devel) (s20121218-480-g020e280-dirty)
Compile cleanup...
  ... Linking
  ... Removing symbol tables
  ... Compiletf functions
  ...     9343 functors (net_fun pool=786432 bytes)
                2807 logic
                   0 bufif
                   0 resolv
                2181 signals
  ...     8707 filters (net_fil pool=1310720 bytes)
  ...    44817 opcodes (1081344 bytes)
  ...     5474 nets
  ...     9343 vvp_nets (1048544 bytes)
  ...       12 arrays (129 words)
  ...      125 memories
                 125 logic (277608 words)
                   0 real (0 words)
  ...      407 scopes
  ... 0.167 seconds, 59244.0/17172.0/2052.0 KBytes size/rss/shared
Running ...
  ...execute EndOfCompile callbacks
  ...propagate initialization events
  ...execute StartOfSim callbacks
  ...run scheduler
Generating expected results
Running test
  ...execute Postsim callbacks
  ... 59.719 seconds, 261020.0/219492.0/2344.0 KBytes size/rss/shared
Event counts:
       130139 time steps (pool=128)
      2411954 thread schedule events
     23563521 assign events
              ...assign(vec4) pool=18724
              ...assign(vec8) pool=204
              ...assign(real) pool=256
              ...assign(word) pool=128
              ...assign(word/r) pool=204
      9721848 other events (pool=4096)

With the vec4-stack branch, the only differences are:

  ...    45991 opcodes (1105920 bytes)

  ... 0.17 seconds, 60368.0/18228.0/2044.0 KBytes size/rss/shared

  ... 55.939 seconds, 555040.0/513392.0/2356.0 KBytes size/rss/shared


Stephen Williams wrote:
>
> Those are pretty encouraging results.
>
> What are you looking at for the memory use?
>
> On 12/05/2014 12:06 PM, Martin Whitaker wrote:
>> Time taken for my long sequence of short tests:
>>
>>     master      22:48
>>     vec4-stack  18:28
>>
>> Time taken for my short sequence of longer tests:
>>
>>     master     (lossless)  12:12
>>     vec4-stack (lossless)   9:53
>>
>>     master     (strict)    11:49
>>     vec4-stack (strict)     9:35
>>
>> So performance looks good. Memory use is still a bit of a concern - for the
>> particular test I looked at, vvp reported
>>
>>     master      261,016 KB
>>     vec4-stack  554,984 KB
>>
>>
>> Stephen Williams wrote:
>>
>> I have received some feedback on the vec4-stack branch, and I've
>> responded to that feedback with some performance improvements.
>> Now, at least for the tests I've run so far, the new vec4-stack
>> branch runtime is significantly faster then that of the master branch.
>>
>> With this milestone, the merge of the vec4-stack branch into master
>> is becoming imminent. I'm thinking maybe early next week. So please
>> give it a go at your convenience, so we can find any issues as
>> soon as possible.
>>
>> Thanks,
>>
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