24 May 15:41
Problems with scaling with Core i7 2670QM
Leandro Scott R.Z. Jacques <lsrzj <at> yahoo.com>
2012-05-24 13:41:05 GMT
2012-05-24 13:41:05 GMT
Hello, I'm using Ubuntu 12.04 and I noticed a strange behaviour when I compile a kernel from sou rce. I tried kernel 3.3.7 and made a make oldconfig of my stock kernel from ubuntu and defaulted all the new options, so I was guarateeing that all th e configs of the stock kernel were being imported to the newly compiled and that scaling would work as it should. The problem is the scaling frequency reported by cpuinfo_cur_freq and scaling_cur_freq as shown below, I compar ed those from compiled and stock kernels. What am I missing? Or it's a kind of bug? /proc/cpuinfo processor : 0 vendor_id : GenuineIntel cp u family : 6 model : 42 model name : Intel( R) Core(TM) i7-2670QM CPU @ 2.20GHz stepping : 7 microco de : 0C39723 cpu MHz : 800.000 cache size : 6144 KB physical id : 0 siblings : 8 core id : 0 cpu cores : 4 apicid : 0 init ial apicid : 0 fpu : yes fpu_exception : yes cpuid level : 13 wp : yes flags : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx rdtscp lm co nstant_tsc arch_perfmon pebs bts nopl xtopology nonstop_tsc aperfmperf p ni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 ssse3 cx16 xtpr pdcm pcid sse4_1 sse4_2 x2apic(Continue reading)
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