https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Core-2-Duo-frequency-after-throttling/m-p/861704#M2436 <P>My operating system is QNX, which does not have API to query cpu frequency after throttled. I had tried to throttle each core and read cpu tempeature by porting from Linux succeessfully.. However,thethrottled cpu frequencyreading from two methodscan not returncorrect values: (1) MSR_FSB_FREQ(0xcd) and MSR_IA32_EBL_CR_POWERON (0x2a), or (2)MSR_IA32_APERF and MSR_IA32_MPERF. </P> <P>In order to read correctthrottled cpu frequency, which MSR register should I use?</P> Fri, 18 May 2007 09:36:39 GMT tsunghsunwu 2007-05-18T09:36:39Z https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Core-2-Duo-frequency-after-throttling/m-p/861704#M2436 <P>My operating system is QNX, which does not have API to query cpu frequency after throttled. I had tried to throttle each core and read cpu tempeature by porting from Linux succeessfully.. However,thethrottled cpu frequencyreading from two methodscan not returncorrect values: (1) MSR_FSB_FREQ(0xcd) and MSR_IA32_EBL_CR_POWERON (0x2a), or (2)MSR_IA32_APERF and MSR_IA32_MPERF. </P> <P>In order to read correctthrottled cpu frequency, which MSR register should I use?</P> Fri, 18 May 2007 09:36:39 GMT https://community.intel.com/t5/Intel-Moderncode-for-Parallel/Core-2-Duo-frequency-after-throttling/m-p/861704#M2436 tsunghsunwu 2007-05-18T09:36:39Z