Originally posted by GreatEmerald
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Benchmarking The Intel P-State, CPUfreq Changes
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Originally posted by Pontostroy View PostProblem with _RADEON_ driver and kernel 3.8+
Probably we need more clever cpu governor that would take into account gpu activity to ensure best performance with OpenGL & OpenCL apps. Though I think the behavior of the ondemand governor can also be improved by tuning its parameters, e.g. the following seems to help on my system (though as I said I'm usually just switching to performance governor, so I didn't test it a lot):
Code:echo 60 > /sys/devices/system/cpu/cpufreq/ondemand/up_threshold
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Originally posted by Ericg View PostThat works too, its just a personal preference for me to use the designated tool rather than hack together a unit file / shell script. But you are right, that would work
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Originally posted by GreatEmerald View PostWell, when using Arch or Gentoo, such unit files shouldn't be much of a problem. You're configuring everything manually, anyway.All opinions are my own not those of my employer if you know who they are.
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Originally posted by vadimg View PostThough I think the behavior of the ondemand governor can also be improved by tuning its parameters, e.g. the following seems to help on my system (though as I said I'm usually just switching to performance governor, so I didn't test it a lot):
Code:echo 60 > /sys/devices/system/cpu/cpufreq/ondemand/up_threshold
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don't select governors.,...
Originally posted by AnonymousCoward View Post95% does seem too high, honestly. Perhaps they designed it with the expectation that most CPU heavy loads would be hitting 100%.
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Originally posted by fenrus View PostThe native P state driver does NOT use cpufreq governors.... no point selecting or setting them (in fact, nothing good can come out that so please just don't do that)
the most interesting benchmarks for this sort of thing are cases where the cpu is not 100% busy.
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Wow!!! LMFAO! Somebody doesn't know the first thing about frequency governors or how to test them. Unless there is something particularly broken about them, when maximum CPU is demanded, they will ALL ramp the CPU up to full power. PERIOD. END OF STORY. That means that there WILL BE no difference in peak performance, which means that testing the peak performance of them is entirely absurd!
What you need to test is POWER CONSUMPTION and SYSTEM RESPONSIVENESS at low to moderate loads.
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Originally posted by droidhacker View PostWow!!! LMFAO! Somebody doesn't know the first thing about frequency governors or how to test them. Unless there is something particularly broken about them, when maximum CPU is demanded, they will ALL ramp the CPU up to full power. PERIOD. END OF STORY. That means that there WILL BE no difference in peak performance, which means that testing the peak performance of them is entirely absurd!
What you need to test is POWER CONSUMPTION and SYSTEM RESPONSIVENESS at low to moderate loads.
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Powersavings ?
Hi,
The pstate is around now for several weeks and I wonder if there are people, who have actually measured some energy savings.
So, before I try my newest kernel compilation, are there any powertop measurements or similar which could show
improvements in battery life. This is what concerns me most, I am not interested in playing high-cpu games but to hear
experiences in normal programming/email/surfing usage.
Thanks to all the others
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