Date: Fri, 20 Apr 2018 14:11:36 +0800 From: Julian Elischer <julian@freebsd.org> To: freebsd-hackers@freebsd.org Subject: Re: RFC: Hiding per-CPU kernel output behind bootverbose Message-ID: <4be440e4-e70f-3652-e755-ed2d924ff3d2@freebsd.org> In-Reply-To: <CAHEMsqYSDYHUJhxmkU_U1hZZLSUwCAV6%2BK_v22kSoDn0NHfxxQ@mail.gmail.com> References: <01000162df15f856-1e5d2641-2a72-4250-8d8e-adcd47bc5db4-000000@email.amazonses.com> <CAHEMsqYSDYHUJhxmkU_U1hZZLSUwCAV6%2BK_v22kSoDn0NHfxxQ@mail.gmail.com>
next in thread | previous in thread | raw e-mail | index | archive | help
On 20/4/18 4:48 am, Steven Hartland wrote: > Sounds good to me, I think we could actually benefit from even quieter > modes if I’m honest. > > On Thu, 19 Apr 2018 at 21:09, Colin Percival <cperciva@tarsnap.com> wrote: > >> On large systems (e.g., EC2's x1e.32xlarge instance type, with 128 vCPUs) >> the boot time console output contains a large number of lines of the forms >> >> SMP: AP CPU #N Launched! >> cpuN: <ACPI CPU> on acpi0 >> estN: <Enhanced SpeedStep Frequency Control> on cpuN >> >> Having 128 almost-identical lines of output doesn't seem very useful, and >> it actually has a nontrivial impact on the time spent booting. >> >> Does anyone mind if I hide these by default, having them only show up if >> boot verbosity is requested? make them single line and just type a CR at the end so they cycle through on the same line. or "previous line repeated N times with only 3 characters different" >> -- >> Colin Percival >> Security Officer Emeritus, FreeBSD | The power to serve >> Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid >> _______________________________________________ >> freebsd-hackers@freebsd.org mailing list >> https://lists.freebsd.org/mailman/listinfo/freebsd-hackers >> To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" >> > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" > >
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?4be440e4-e70f-3652-e755-ed2d924ff3d2>