Date: Thu, 20 May 2021 18:59:17 UTC
Michael Gmelin wrote this message on Thu, May 20, 2021 at 18:01 +0200: > I'm leaving this here, mostly so that others (or future me) can google > it up. > > Traditionally, CTRL-t would give a one-line output + whatever the > process specific signal handler comes up with: > > # sleep 120 <--- hits CTRL-t > load: 0.27 cmd: sleep 38162 [nanslp] 0.64r 0.00u 0.00s 0% 1780k > sleep: about 119 second(s) left out of the original 120 > > # cat <--- hits CTRL-t > load: 0.02 cmd: cat 24379 [ttyin] 0.63r 0.00u 0.00s 0% 2308k > > > On 13 I get: > > # sleep 120 <--- hits CTRL-t > load: 0.12 cmd: sleep 3241 [nanslp] 0.52r 0.00u 0.00s 0% 2172k > mi_switch+0xc1 sleepq_catch_signals+0x2e6 sleepq_timedwait_sig+0x12 > _sleep+0x199 kern_clock_nanosleep+0x1e1 sys_nanosleep+0x3b > amd64_syscall+0x10c fast_syscall_common+0xf8 sleep: about 119 > second(s) left out of the original 120 > > # cat <--- hits CTRL-t > load: 0.09 cmd: cat 3240 [ttyin] 0.23r 0.00u 0.00s 0% 2300k > mi_switch+0xc1 sleepq_catch_signals+0x2e6 sleepq_wait_sig+0x9 > _cv_wait_sig+0xe4 tty_wait+0x1c ttydisc_read+0x2ac ttydev_read+0x56 > devfs_read_f+0xd5 dofileread+0x81 sys_read+0xbc amd64_syscall+0x10c > fast_syscall_common+0xf8 > > which is quite way too verbose when checking the progress of > long-running processes, like cp, dd, or poudriere. Especially as CTRL-t > is part of the user experience to me - I use it to interact with the > machine outside of debugging software issues. > > Setting > > sysctl kern.tty_info_kstacks=0 > echo kern.tty_info_kstacks=0 >>/etc/sysctl.conf > > fixes this permanently. > > Apparently, this was enabled by default on purpose, so that people > find the feature (which certainly worked ^_^), but I think it would > been worth mentioning the sysctl somewhere in the release notes/errata, > so that people understand how to disable it again. I think the original intent was to disable this on -stable or at least -RELEASEs, but it looks like this didn't happen. This is VERY helpful for a developer, but not as helpful for most users. Conrad, Should this be disabled on -stable now? -- John-Mark Gurney Voice: +1 415 225 5579 "All that I will do, has been done, All that I have, has not."