Re: [myhdl-list] OSS CVC vpi module

[Paul.Y.Zhang <yzh...@gm...>]

After some test，I found the memory leak is caused by "vpi_put_value()".

- Paul

在 2014/12/17 0:13, Christopher Felton 写道:
> On 12/16/2014 9:46 AM, Paul.Y.Zhang wrote:
>> Hi, Chris,
>>
>> Excuse me, I am not very familar with the PLI/VPI technology. I do not
>> see any tf_ functions in "myhdl_vpi.c" codes. Waiting for your progress.
>>
>> - Paul
> I didn't look ... I wonder what Steve was referring to
> then?
>
> .chris
>
>> 在 2014/12/16 22:58, Christopher Felton 写道:
>>> On 12/13/2014 7:43 PM, Paul.Y.Zhang wrote:
>>>> neccHi,
>>>>
>>>> I post the cver vpi module (cosimulation/cver/myhdl_vpi.c) to Steve
>>>> Meyer (the author of OSS CVC?), to get help of the memory leak issue.
>>>> Got the below replay:
>>>>
>>>>        I assume calltf means the PLI uses the old tf_ interface.  You need to
>>>> translate (or find) a version of your myhdl PLI coded in vpi_.  tf_ is obsolete
>>>> old 1990s Verilog XL PLI that is deprecated (removed from) IEEE 1364 2005.
>>>> The reason tf_ is removed is that it just grew in Cadence XL so nobody could
>>>> duplicate behavior.
>>> According to the 1364-2005 LRM [1] which contains the
>>> PLI/VPI definition, indicates the tf_ functions are
>>> deprecated (section 24).
>>>
>>> Wow - I am a little slow to follow this thread, I didn't
>>> realize that the Tachyon re-opened/released their
>>> simulator, originally they open-sourced GPLCVER [2] and
>>> now they open-sourced CVC [3].  This is pretty amazing
>>> because CVC is fast and a great companion with MyHDL (IMO).
>>>
>>> I will try and experiment replacing the tf_ functions
>>> with the OSS CVC and see if the leak can be resolved.
>>>
>>> Regards,
>>> Chris
>>>
>>>
>>> [1] http://ieeexplore.ieee.org/servlet/opac?punumber=10779
>>>         (probably can alos be found by googling, note "Verilog"
>>>          has been merged with SV in the 1800 standard ...)
>>>
>>> [2] http://sourceforge.net/projects/gplcver/
>>>
>>> [3] http://www.tachyon-da.com/
>>>
>>>
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-- 
Paul