Date: Sun, 12 Sep 2010 12:29:37 +0300 From: Alexander Motin <mav@FreeBSD.org> To: Norikatsu Shigemura <nork@FreeBSD.org> Cc: FreeBSD-Current <freebsd-current@freebsd.org>, Andriy Gapon <avg@icyb.net.ua> Subject: Re: CPU C-state storange on Panasonic TOUGH BOOK CF-R9 Message-ID: <4C8C9D81.9090401@FreeBSD.org> In-Reply-To: <20100912182625.c49d3f1d.nork@FreeBSD.org> References: <4C8BCAC5.5050008@root.org> <mailpost.1284277196.1767764.83548.mailing.freebsd.current@FreeBSD.cs.nctu.edu.tw> <4C8C8B64.8020907@FreeBSD.org> <20100912182625.c49d3f1d.nork@FreeBSD.org>
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Norikatsu Shigemura wrote: > On Sun, 12 Sep 2010 11:12:20 +0300 > Alexander Motin <mav@freebsd.org> wrote: >>>>> PROCESSOR-0696 [257314] cpu_cx_cst : acpi_cpu3: C2[1] not available. >>>>> PROCESSOR-0730 [257314] cpu_cx_cst : acpi_cpu3: Got C3 - 245 latency >>>> I think the issue is that C2 is not available for some reason and thus >>>> C3 can't be used either. The way to tell is to use acpidump and look for >>>> the CPU objects' _CST fields. >>> The "not available" message means that transition latency is defined too high. >>> That is, in this case latency is greater than 100 for C2. >> Just an idea. Limits of 100 and 1000 are defined for detection of >> C-states using P_LVLx_LAT registers. Because _CST explicitly specifies > > Oops! I forgot. Thank you, I tried. > But cx_lowest is not changed: > - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - > $ sysctl -a | grep cx > hw.acpi.cpu.cx_lowest: C1 > dev.cpu.0.cx_supported: C1/3 C2/245 > dev.cpu.0.cx_lowest: C1 > dev.cpu.0.cx_usage: 100.00% 0.00% last 3641us > dev.cpu.1.cx_supported: C1/3 C2/245 > dev.cpu.1.cx_lowest: C1 > dev.cpu.1.cx_usage: 100.00% 0.00% last 798us > dev.cpu.2.cx_supported: C1/3 C2/245 > dev.cpu.2.cx_lowest: C1 > dev.cpu.2.cx_usage: 100.00% 0.00% last 158us > dev.cpu.3.cx_supported: C1/3 C2/245 > dev.cpu.3.cx_lowest: C1 > dev.cpu.3.cx_usage: 100.00% 0.00% last 227us > - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - hw.acpi.cpu.cx_lowest has default in C1. Have you tried to rise it via sysctl? -- Alexander Motin
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