On Tue, 3 Dec 2024 20:42:42 +0900 Takashi Yano wrote: > On Mon, 2 Dec 2024 19:57:25 +0000 > Steven Buehler wrote: > > I am experiencing an abnormal number of page-faults per second (averaging > > 800 to over 2000) when using Cygwin within the Windows Terminal app. This > > produces visible stutters and cursor movement during terminal screen > > redraws. > > > > I have opened an issue on the Windows Terminal GitHub issues page. The > > initial investigation by one of the Windows Terminal developers has > > determined that "Cygwin is calling console APIs in its steady state. It > > looks like it's calling GetConsoleProcessList in a tight loop, which > > results in the allocation of a new buffer that is returned to their process > > via condrv's ioctl interface. I don't think there's anything we can do > > about that, other than stopping them from doing so." > > > > Following this response, I am attempting to bring this issue to the Cygwin > > developer team's awareness for a possible resolution. Please see > > https://github.com/microsoft/terminal/issues/18264 for a detailed > > discussion and accompanying video demonstration of the page-fault counter. > > Thanks for the report. > However, I cannot reproduce your problem. > Which cygwin version do you use?
I cound finally reproduce it. With Windows Terminal (Release version: 1.21.3231.0), this does not happen. Also, if the shell is tcsh (not bash), this does not happen as well. With Windows Termianl 1.22.3232.0 and bash, I cound reproduce that. As the issue does not occur with 1.21.3231.0, isn't this a regression of Windows Terminal (preview)? I cannot understand the reason why calling GetConsoleProcessList() exhosts the buffer memory, because the buffer lpdwProcessList is allocated by cygwin side (not in condrv). If we cannot call GetConsoleProcessList() frequently, I think it is the problem of Windows API side. -- Takashi Yano <takashi.y...@nifty.ne.jp> -- Problem reports: https://cygwin.com/problems.html FAQ: https://cygwin.com/faq/ Documentation: https://cygwin.com/docs.html Unsubscribe info: https://cygwin.com/ml/#unsubscribe-simple
