net6501 Speedstep/cpufreq
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net6501 Speedstep/cpufreq
by Ben Kochie-2
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I'm testing my net6501-70 boxes right now with Vyatta Linux
(2.6.37-1-586-vyatta) The cpufreq modules don't seem to be loading properly. This is likely because it can't find the ACPI table from the BIOS to setup the correct modes for the Atom E680. I tried loading some of the modules manually, but they don't seem to work. The CPU runs at about 115F which isn't too bad, but it would be nice if speestep worked. Has anyone had any luck with this? Maybe it's possible to load the required tables from userspace. # uname -a Linux vyatta 2.6.37-1-586-vyatta #1 SMP Thu Jul 7 22:01:14 PDT 2011 i686 GNU/Linux # lsmod | grep cpu acpi_cpufreq 4411 0 processor 21816 1 acpi_cpufreq mperf 907 1 acpi_cpufreq cpufreq_userspace 1392 0 cpufreq_stats 1950 0 cpufreq_powersave 614 0 cpufreq_ondemand 6180 0 freq_table 1679 3 acpi_cpufreq,cpufreq_stats,cpufreq_ondemand cpufreq_conservative 6182 0 # cpufreq-info cpufrequtils 007: cpufreq-info (C) Dominik Brodowski 2004-2009 Report errors and bugs to cpufreq@..., please. analyzing CPU 0: no or unknown cpufreq driver is active on this CPU maximum transition latency: 0.00 ms. analyzing CPU 1: no or unknown cpufreq driver is active on this CPU maximum transition latency: 0.00 ms. # dmesg | grep -i cpu [ 0.000000] x86 PAT enabled: cpu 0, old 0x7040600070406, new 0x7010600070106 [ 0.000000] Processor #0 (Bootup-CPU) [ 0.000000] SMP: Allowing 2 CPUs, 0 hotplug CPUs [ 0.000000] setup_percpu: NR_CPUS:32 nr_cpumask_bits:32 nr_cpu_ids:2 nr_node_ids:1 [ 0.000000] PERCPU: Embedded 12 pages/cpu @f5000000 s25088 r0 d24064 u2097152 [ 0.000000] pcpu-alloc: s25088 r0 d24064 u2097152 alloc=1*4194304 [ 0.000000] pcpu-alloc: [0] 0 1 [ 0.000000] Initializing CPU#0 [ 0.000000] SLUB: Genslabs=15, HWalign=64, Order=0-3, MinObjects=0, CPUs=2, Nodes=1 [ 0.000000] RCU-based detection of stalled CPUs is disabled. [ 0.000000] CPU 0 irqstacks, hard=f4c08000 soft=f4c0a000 [ 0.010790] CPU: Physical Processor ID: 0 [ 0.010803] CPU: Processor Core ID: 0 [ 0.010817] mce: CPU supports 5 MCE banks [ 0.010849] CPU0: Thermal monitoring enabled (TM1) [ 0.114604] CPU0: Genuine Intel(R) CPU @ 1.60GHz stepping 01 [ 0.231080] CPU 1 irqstacks, hard=f4c62000 soft=f4c64000 [ 0.020000] Initializing CPU#1 [ 0.400054] Brought up 2 CPUs [ 3.474210] cpuidle: using governor ladder [ 3.474210] cpuidle: using governor menu _______________________________________________ Soekris-tech mailing list Soekris-tech@... http://lists.soekris.com/mailman/listinfo/soekris-tech |
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Re: net6501 Speedstep/cpufreq
by Chris Boot
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On 17 Mar 2012, at 19:22, Ben Kochie <superq@...> wrote: > I'm testing my net6501-70 boxes right now with Vyatta Linux > (2.6.37-1-586-vyatta) > > The cpufreq modules don't seem to be loading properly. This is likely > because it can't find the ACPI table from the BIOS to setup the > correct modes for the Atom E680. I tried loading some of the modules > manually, but they don't seem to work. > > The CPU runs at about 115F which isn't too bad, but it would be nice > if speestep worked. Has anyone had any luck with this? Maybe it's > possible to load the required tables from userspace. [snip] The 6501 BIOS has no ACPI and there are no plans to implement it. Without ACPI you can't get cpufreq on these newer processors. Basically, you can't use cpufreq scaling on the 6501 and won't be able to for the foreseeable future. HTH, Chris -- Chris Boot bootc@... _______________________________________________ Soekris-tech mailing list Soekris-tech@... http://lists.soekris.com/mailman/listinfo/soekris-tech |
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Re: net6501 Speedstep/cpufreq
by Stanislav Meduna
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On 18.03.2012 13:03, Chris Boot wrote:
> The 6501 BIOS has no ACPI and there are no plans to implement > it. Without ACPI you can't get cpufreq on these newer processors. > Basically, you can't use cpufreq scaling on the 6501 and won't > be able to for the foreseeable future. You might try your luck in some of the linux mailing lists. As long as only the cpufreq is requested this should not be so hard to implement - basically taking the old speedstep-centrino.c driver and dig the correct values of the frequency/voltage table from the CPU manual. If you find out how to contact this guy http://software.intel.com/en-us/forums/showthread.php?t=61309 who tried this with another processor 3 years ago, maybe he is able to give some hints. Regards -- Stano _______________________________________________ Soekris-tech mailing list Soekris-tech@... http://lists.soekris.com/mailman/listinfo/soekris-tech |
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Re: net6501 Speedstep/cpufreq
by Soren Kristensen
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Hi,
Chris Boot wrote: > > On 17 Mar 2012, at 19:22, Ben Kochie<superq@...> wrote: > >> I'm testing my net6501-70 boxes right now with Vyatta Linux >> (2.6.37-1-586-vyatta) >> >> The cpufreq modules don't seem to be loading properly. This is >> likely because it can't find the ACPI table from the BIOS to setup >> the correct modes for the Atom E680. I tried loading some of the >> modules manually, but they don't seem to work. >> >> The CPU runs at about 115F which isn't too bad, but it would be >> nice if speestep worked. Has anyone had any luck with this? Maybe >> it's possible to load the required tables from userspace. > > [snip] > > The 6501 BIOS has no ACPI and there are no plans to implement it. > Without ACPI you can't get cpufreq on these newer processors. > Basically, you can't use cpufreq scaling on the 6501 and won't be > able to for the foreseeable future. Although it's not highest priority, I am looking into implementing ACPI, it's not that complicated as long as it's just the tables and not the advanced power management.... But despite having all kind of docs on the Atom E6xx series, including BIOS writers guide under RSNDA, I haven't managed yet to get the P-State tables.... And there isn't that much power to save anyway, the Atom core itself is using less power than the memory and io controllers.... Best Regards, Soren Kristensen CEO & Chief Engineer Soekris Engineering, Inc. _______________________________________________ Soekris-tech mailing list Soekris-tech@... http://lists.soekris.com/mailman/listinfo/soekris-tech |
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Re: net6501 Speedstep/cpufreq
by Stanislav Meduna
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On 18.03.2012 14:07, Soren Kristensen wrote:
> But despite having all kind of docs on the Atom E6xx series, including > BIOS writers guide under RSNDA, I haven't managed yet to get the P-State > tables.... Wow, you are right - I digged through nearly everything and did not found anything usable. When did this Intel policy change? Anyway, reading and saving the table from some existing ACPI-enabled BIOS via a published interface should not count as anything illegal, does it? - in that case the acpi-cpufreq log messages would be also illegal... At least for a person that did not sign any NDA. > And there isn't that much power to save anyway, the Atom core itself is > using less power than the memory and io controllers.... OK, then it probably does not really make sense anyway. Regards -- Stano _______________________________________________ Soekris-tech mailing list Soekris-tech@... http://lists.soekris.com/mailman/listinfo/soekris-tech |
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Re: net6501 Speedstep/cpufreq
by Ben Kochie-2
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I wonder if the tables are in coreboot. I know some people who might be able to help with this. On Mar 18, 2012 12:36 PM, "Stanislav Meduna" <stano@...> wrote:
On 18.03.2012 14:07, Soren Kristensen wrote: _______________________________________________ Soekris-tech mailing list Soekris-tech@... http://lists.soekris.com/mailman/listinfo/soekris-tech |
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