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"lscpu" info
Hello!
I'am Debian user. On default kernel, lspcu output: :: Code ::
# lscpu Architecture: x86_64 CPU op-mode(s): 32-bit, 64-bit Byte Order: Little Endian CPU(s): 4 On-line CPU(s) list: 0-3 Thread(s) per core: 2 Core(s) per socket: 2 Socket(s): 1 NUMA node(s): 1 Vendor ID: GenuineIntel CPU family: 6 Model: 60 Model name: Intel(R) Core(TM) i5-4200H CPU @ 2.80GHz Stepping: 3 CPU MHz: 800.000 CPU max MHz: 3400.0000 CPU min MHz: 800.0000 BogoMIPS: 5587.07 Virtualization: VT-x L1d cache: 32K L1i cache: 32K L2 cache: 256K L3 cache: 3072K NUMA node0 CPU(s): 0-3 Flags: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov pat pse36 clflush dts acpi mmx fxsr sse_perfmon pebs bts rep_good nopl xtopology nonstop_tsc aperfmperf eagerfpu pni pclmulqdq dtes64 monitor ds_cpl vmx est tm2 sst tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm abm epb tpr_shadow vnmi flexpriority ept vpid fsgsbase tsc_adjust bmi on liquorix kernel, value of "CPU max MHz" == default == 2800. I think, you did not activate kernel options of Intel P-States... Back to top |
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Hi eiff,
I disabled the intel p-state module a few versions ago when Phoronix revealed unpredictable performance over ondemand. It can be faster, it can be slower, but when it's slower, it can be really bad. I'm interested in turning it back on, but I'm waiting for more benchmarks to verify that it's consistently as good or better than ondemand. There's also schedutil in development and already in mainline. It looks very promising but it's also consistently about 5% or so slower than ondemand, but has potential for much higher power savings. On the other hand, you can see what frequency you're really running by i7z or turbostat (whatever your distribution has). From what I understand, if you're running at the highest frequency with ondemand, turbo kicks in and you can see the real frequency you're running at through these two utilities. At least on my personal / work machines, I'm consistently in turbo when under full load. Hope that clears things up for you. Back to top |
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