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VCD file is not flushed if stdout is piped into 'less' #877

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veripoolbot opened this issue Feb 3, 2015 · 1 comment
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VCD file is not flushed if stdout is piped into 'less' #877

veripoolbot opened this issue Feb 3, 2015 · 1 comment
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resolution: wontfix Closed; work won't continue on an issue or pull request

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Author Name: Iztok Jeras (@jeras)
Original Redmine Issue: 877 from https://www.veripool.org
Original Date: 2015-02-03

Hi,

I created a bench which outputs a lot of text after the first error, so I piped the output into less like this:

LD_LIBRARY_PATH=/usr/local/lib/ obj_dir/Vrp8_verilator |less

The VCD file is not generated entirely till I scroll to the bottom in the less editor. It seems to stop at about the same time in the simulation where the currently visible error in the editor was generated.

Regards,
Iztok Jeras
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Original Redmine Comment
Author Name: Wilson Snyder (@wsnyder)
Original Date: 2015-02-03T20:03:44Z

This is the nature of how unbuffered IO works in the OSes, which is required to get reasonable trace performance under normal usage. Sorry.

@veripoolbot veripoolbot added the resolution: wontfix Closed; work won't continue on an issue or pull request label Dec 22, 2019
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