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CodeXL

zhongliangong
Journeyman III

Disrepancy between CPU Frequency reported by CodeXL 1.6.7247 and dmidecode

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When running reference xhpl (LINPACK) benchmark, the CodeXL power profiler displays the CPU frequency as 2.4GHz.

power_profile1.png

I ran nbench (a single-threaded benchmark) to verify that the reported speed was not due to throttling, but in both cases, the CPU speed was 2.2-2.4GHz

power_profile_single.png

Which of the output values should I take as the accurate one?

Thank you!

Zhong Liang ONG

System setup:

    Hardware
        AMD Kaveri A10-3850K - 3.7GHz (advertised speed and dmidecode value)

        32GB DDR3-2133 RAM

        Crucial M550 240GB SSD

    Environment

        Centos 7.0.1406 x86_64

        AMD Catalyst Omega 14.501.1003 driver

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rajeebbarman
Staff
Staff

Re: Disrepancy between CPU Frequency reported by CodeXL 1.6.7247 and dmidecode

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Dear Zhongliangong,

The frequency shown here in CodeXL power profiler is "Core Effective Frequency". This is the effective frequency of a core over a period of time.

Regards,

Rajeeb

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rajeebbarman
Staff
Staff

Re: Disrepancy between CPU Frequency reported by CodeXL 1.6.7247 and dmidecode

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Dear Zhongliangong,

The frequency shown here in CodeXL power profiler is "Core Effective Frequency". This is the effective frequency of a core over a period of time.

Regards,

Rajeeb

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