cygwin application on MsTerminal, enabling win32-raw-mode results in runway memory/CPU usage.

[Adamyg Mob]

 *One suspect is the fhandler_console::cons_master_thread (), which
attempts to mine signals within the input stream; yet it may not handle a
single key being represented by multiple events.*; furthermore one of the
few uses of WriteConsoleInput
Is there any means of disabling the feature for testing?

Interface details can be under:
https://github.com/microsoft/terminal/blob/main/doc/specs/%234999%20-%20Improved%20keyboard%20handling%20in%20Conpty.md

On Sat, Aug 31, 2024 at 10:33 AM Takashi Yano <takashi.yano@nifty.ne.jp>
wrote:

> On Fri, 30 Aug 2024 19:56:34 +0800
> Adamyg Mob wrote:
> >  Cygwin: CYGWIN_NT-10.0-19045 WEED3 3.5.4-1.x86_64 2024-08-25 16:52 UTC
> > x86_64 Cygwin
> > Windows Terminal version:  1.20.11781.0
> > Windows build number: 10.0.19045.4780
> >
> > When running a cygwin64 based terminal application under a MsTerminal
> > session, with win32-raw-mode "\033[?9001h" enabled,
> > after brief input in the application becoming unresponsive and the
> session
> > rapidly consumes all available memory/cpu..
> >
> > Test application attached, plus ticket
> > https://github.com/microsoft/terminal/issues/17824 contains additional
> > information.
>
> Thanks for the report.
>
> Are there any documents for win32-raw-mode "\033[?9001h" ?
>
> I am very puzzled with that WriteConsoleInput() with one event
> generates ~15 input events for ReadConsoleInput() in this mode.
>
> --
> Takashi Yano <takashi.yano@nifty.ne.jp>
>