Date: Thu, 5 Apr 2012 20:31:07 +0300 From: Ivan Klymenko <fidaj@ukr.net> To: =?UTF-8?B?0JvRjtCx0L7QvNC40YAg0JPRgNC40LPQvtGA0L7Qsg==?= <nm.knife@gmail.com> Cc: Volodymyr Kostyrko <c.kworr@gmail.com>, freebsd-stable@freebsd.org Subject: Re: lowest C-state changes Message-ID: <20120405203107.60cb3b79@nonamehost.> In-Reply-To: <CAHi1JscsVbGNcqaZZ78xpCXoGh%2BYK7b2SOJmSK=O=Xpfvniniw@mail.gmail.com> References: <CAHi1Jscju7t1PdZa7yjY6kKK0tAuqwc8GUidO3e8o=P__BybQA@mail.gmail.com> <4F7D70C7.60105@gmail.com> <4f7d73db.96e7d80a.509c.2afaSMTPIN_ADDED@mx.google.com> <CAHi1JscsVbGNcqaZZ78xpCXoGh%2BYK7b2SOJmSK=O=Xpfvniniw@mail.gmail.com>
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В Thu, 5 Apr 2012 10:10:30 -0700 Любомир Григоров <nm.knife@gmail.com> пишет: > > Have you checked http://wiki.freebsd.org/TuningPowerConsumption? > I have. It was kind of confusing and didn't know about: > > 1. For CX states to function correctly you better disable throttling > > and powerd. I also witnessed at least one machine that hitting any > > CX mode stops generate interrupts on APIC clock (I had to boot it > > with a mousee until I disabled APIC clocks). > So do you recommend I use throttling or C3? I think C3 runs slightly > cooler. I can't tell since I don't drop under 50C in X. Fan increases > at 60C and drops me back. > > > 2. You don't need to set each processor CX value, you only need to > > set: > > > > hw.acpi.cpu.cx_lowest=C3 > > > > All cpu's will inherit default profile. > > > Thanks. > > > First need to see what state the processor supports the current > > system > >sysctl -a | grep cx_ > This is before heavy load while it still remembers the C3: > > hw.acpi.cpu.cx_lowest: C1 > dev.cpu.0.cx_supported: C1/1 C2/80 C3/109 > dev.cpu.0.cx_lowest: C3 > dev.cpu.0.cx_usage: 0.89% 0.77% 98.32% last 47us > dev.cpu.1.cx_supported: C1/1 C2/80 C3/109 > dev.cpu.1.cx_lowest: C3 > dev.cpu.1.cx_usage: 3.30% 3.18% 93.50% last 3852us > dev.cpu.2.cx_supported: C1/1 C2/80 C3/109 > dev.cpu.2.cx_lowest: C3 > dev.cpu.2.cx_usage: 2.95% 1.42% 95.61% last 293us > dev.cpu.3.cx_supported: C1/1 C2/80 C3/109 > dev.cpu.3.cx_lowest: C3 > dev.cpu.3.cx_usage: 2.73% 1.55% 95.71% last 8471us > > After lowest becomes C1, all 4 cores are 100% C1. So I have to > manually set back, or disable powerd or C states. I prefer powerd, > tbh, so please recommend what I should use. > > Cheers. > sysctl hw.acpi.acline - changes its value when disconnecting the power supply to the laptop?
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