Ticket #36094

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XON/XOFF hardcoded limits too high

Open Date: 2016-03-04 01:31 Last Update: 2016-03-17 21:47

Reporter: (Anonymous) Owner: (None)
Type: Bugs Status: Open
Component: (None) MileStone: (None)
Priority: 5 - Medium Severity: 5 - Medium
Resolution: None


XON/XOFF limits are currently set to 2048 bytes. This number is too high. The software flow control numbers are set from the ends of the buffer, and most UART buffers are much smaller than 2048. This causes poor performance in software flow control mode because the UART would send XON/XOFF constantly.

https://osdn.jp/projects/ttssh2/scm/svn/blobs/head/trunk/teraterm/teraterm/commlib.c lines 81/82.

Recommend changing XON/XOFF hardcoded limits to 128/128.

Prefer adding user-setting for XON/XOFF limits to configuration window.

Thank you.

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Ticket History (3/3 Histories)

2016-03-04 01:31 Updated by: None
  • New Ticket "XON/XOFF hardcoded limits too high" created
2016-03-04 01:33 Updated by: None
2016-03-17 21:47 Updated by: maya

Thank you for your report.

Where can we confirm that 128 is recommended bytes of these limits?


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