Date: Thu, 22 Mar 2012 00:24:22 -0700 From: John <john@theusgroup.com> To: Kevin Oberman <kob6558@gmail.com> Cc: Matthias Gamsjager <mgamsjager@gmail.com>, freebsd-stable@freebsd.org Subject: Re: powerd and increase in energy need Message-ID: <20120322072422.5F4DD2B5@server.theusgroup.com> In-Reply-To: <CAN6yY1tKYbTjgQsL1gnfrc9r68c%2BQDCb1SAb%2BM=RFA90jvLpnw@mail.gmail.com> References: <CA%2BD9Qhv5EmrkqvLetx9T5WD_1BRuCpUyZ=VYnRSjwRYqA7phdg@mail.gmail.com> <20120321000058.177F8256@server.theusgroup.com> <CA%2BD9QhsMMXYbLKg__jZx=7KbCHtK6LjqkfL9WSWs=pdT-t9r0w@mail.gmail.com> <CAN6yY1tKYbTjgQsL1gnfrc9r68c%2BQDCb1SAb%2BM=RFA90jvLpnw@mail.gmail.com>
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> >If you are trying to reduce power consumption, why are you limiting Cx >states to C2 (which save little) and not C3 (which will save a LOT of >power when the CPU is not heavily loaded). With my hardware, i5-650, using C3 does not result in lower power consumption versus C2. Both states draw exactly the same power. hw.acpi.cpu.cx_lowest: C3 dev.cpu.0.cx_supported: C1/3 C2/205 C3/245 dev.cpu.0.cx_lowest: C3 dev.cpu.1.cx_supported: C1/3 C2/205 C3/245 dev.cpu.1.cx_lowest: C3 dev.cpu.2.cx_supported: C1/3 C2/205 C3/245 dev.cpu.2.cx_lowest: C3 dev.cpu.3.cx_supported: C1/3 C2/205 C3/245 dev.cpu.3.cx_lowest: C3 71w idle power hw.acpi.cpu.cx_lowest: C2 dev.cpu.0.cx_supported: C1/3 C2/205 C3/245 dev.cpu.0.cx_lowest: C2 dev.cpu.1.cx_supported: C1/3 C2/205 C3/245 dev.cpu.1.cx_lowest: C2 dev.cpu.2.cx_supported: C1/3 C2/205 C3/245 dev.cpu.2.cx_lowest: C2 dev.cpu.3.cx_supported: C1/3 C2/205 C3/245 dev.cpu.3.cx_lowest: C2 71w idle power John Theus TheUs Group TheUsGroup.com
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