Date: Mon, 10 Jan 2011 23:39:16 +0100 From: "Arno J. Klaassen" <arno@heho.snv.jussieu.fr> To: Alexander Motin <mav@FreeBSD.org> Cc: acpi@FreeBSD.org, John Baldwin <jhb@FreeBSD.org> Subject: Re: Tyan S3992-E: hpet no longer working Message-ID: <wpoc7o1izv.fsf@heho.snv.jussieu.fr> In-Reply-To: <4D2B8944.6030200@FreeBSD.org> (Alexander Motin's message of "Tue\, 11 Jan 2011 00\:33\:40 %2B0200") References: <wpk4ij3u9f.fsf@heho.snv.jussieu.fr> <201101101500.45783.jhb@freebsd.org> <4D2B67E4.70907@FreeBSD.org> <201101101515.47127.jhb@freebsd.org> <wpwrmc4f9n.fsf@heho.snv.jussieu.fr> <4D2B8944.6030200@FreeBSD.org>
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Alexander Motin <mav@FreeBSD.org> writes: > Arno J. Klaassen wrote: >> Sure .. that said, the BIOS I use is the last official release for this >> board (Sept 2009) and not even a more recent beta-release is available. >> >> I would expect reporting a disabled device which cannot be enabled via >> de BIOS a bug deserving a newer release. >> >> Anyway, this bug isn't very harmful for me, but the non-hpet >> timecounters don't seem that fun either : >> >> # uptime >> 10:27PM up 2 days, 5:44 >> >> # sysctl kern.timecounter.hardware kern.timecounter.choice >> kern.timecounter.hardware: ACPI-safe >> kern.timecounter.choice: TSC(-100) i8254(0) ACPI-safe(850) dummy(-1000000) >> >> # vmstat -i | fgrep cpu: >> cpu0:timer 38599321 199 >> cpu6:timer 2151003 11 >> cpu1:timer 7121075 36 >> cpu3:timer 1808269 9 >> cpu5:timer 3832463 19 >> cpu2:timer 2399988 12 >> cpu7:timer 2013444 10 >> cpu4:timer 21630368 111 >> >> (default HZ ....) >> >> Maybe I should try downgrading the BIOS? > > So what here seems not funny to you? Lower timer interrupt rate is not a > bug but feature of 9-CURRENT. the standard deviation in the values; I don't have another 8-way by hand, but a 4-way 6-STABLE gives : cpu0: timer 3299774936 2000 cpu2: timer 3299757640 2000 cpu3: timer 3299757640 2000 cpu1: timer 3299757640 2000 and my 8-STABLE notebook (with kern.hz=100) : cpu0: timer 323161363 400 cpu1: timer 323161114 400 A range from 9 to 199 is 'funny', maybe I choose the wrong word, but I didn't see such discrepancies before. Sorry Best, Arno
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