Date: Tue, 8 Dec 2015 15:59:43 -0500 (EST) From: Rick Macklem <rmacklem@uoguelph.ca> To: John Baldwin <jhb@freebsd.org> Cc: freebsd-current@freebsd.org, Adrian Chadd <adrian.chadd@gmail.com>, Alexander Kabaev <kabaev@gmail.com> Subject: Re: slow screen updates on laptop console (i386) Message-ID: <3445221.124330583.1449608383662.JavaMail.zimbra@uoguelph.ca> In-Reply-To: <1558819.MnyjzOdus5@ralph.baldwin.cx> References: <900422043.121631608.1449496955386.JavaMail.zimbra@uoguelph.ca> <CAJ-Vmom3xd7B%2B3hcFvP-yzGSDv1m3E%2BdRj_EdL8s%2BVzKMHN2zQ@mail.gmail.com> <387840531.122544462.1449529268528.JavaMail.zimbra@uoguelph.ca> <1558819.MnyjzOdus5@ralph.baldwin.cx>
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John Baldwin wrote: > On Monday, December 07, 2015 06:01:08 PM Rick Macklem wrote: > > Adrian Chadd wrote: > > > Hi, > > > > > > ok. please file a bug for that. It may be something to do with the > > > hardware and sleep states and skipping wakeups/interrupts or > > > something. > > > > > > Please try using the default again (LAPIC?) and set > > > kern.eventtimer.periodic=1. See if that fixes it. > > > > > Actually made it worse. Instead of being intermittently slow, it was > > almost constantly slow. > > Try disabling C-states if they are enabled. If you have a BIOS option > for C1E you might need to disable that as well. If this fixes it, then > there isn't a really viable solution in software, and you might prefer > to use the RTC to get the power savings from C-states. > Oh, I do see stuff like: hw.acpi.cpu.cx_lowest: C2 and dev.cpu.0.cx_supported: C1/1/1 C2/2/1 C3/3/85 Is there a sysctl to disable "C states"? Thanks, rick ps: Like I said, I don't care, but maybe Adrian would like me to try settings? > -- > John Baldwin > _______________________________________________ > freebsd-current@freebsd.org mailing list > https://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe@freebsd.org" >
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