On 日, 2019-06-09 at 14:12 +0200, Pavel Machek wrote: > Hi! > > > > > > > > > When I start flightgear, I get framerates around 20 fps and cpu > > > at > > > 3GHz: > > > > > > pavel@duo:~/bt$ cat /proc/cpuinfo | grep MHz > > > cpu MHz : 3027.471 > > > cpu MHz : 2981.863 > > > cpu MHz : 2958.352 > > > cpu MHz : 2864.001 > > > pavel@duo:~/bt$ > > > > > > (Ok, fgfs is really only running at single core, so why do both > > > cores > > > run at 3GHz?) > > > > > > But temperatures get quite high: > > > > > > pavel@duo:~/bt$ sensors > > > thinkpad-isa-0000 > > > Adapter: ISA adapter > > > fan1: 4485 RPM > > > > > > coretemp-isa-0000 > > > Adapter: ISA adapter > > > Package id 0: +98.0°C (high = +86.0°C, crit = +100.0°C) > > > Core 0: +98.0°C (high = +86.0°C, crit = +100.0°C) > > > Core 1: +91.0°C (high = +86.0°C, crit = +100.0°C) > > > > > > And soon cpu goes to 1.5GHz range, with framerates going down to > > > 12fps. That's a bit low. > > > > > > Room temperature is 26Celsius. > > > > > > The CPU is Intel(R) Core(TM) i5-2520M CPU @ 2.50GHz . I guess it > > > means > > > it should be able to sustain both cores running at 2.5GHz? > > > > > > Any ideas? Were there any recent changes in that area? > > I tried kernel compile. It keeps both cores at 3GHz, temperature > > goes > > up over 95C, and then cpus start going down to 2.3GHz... and then > > down > > to 2GHz... and down to 1.9GHz. > > > > watch bash -c 'sensors; cat /proc/cpuinfo | grep MHz' > Situation is very different with v4.6 distro based kernel. > > CPU MHz is only getting values round to 100MHz. It does not go above > 2.5GHz, but it does not go below 2.5GHz under the load, either. > > ACPI adapter appears in sensors output. what temperature does coretemp report? can you please provide the sensors output in 4.6 during kernel compiling? can you attach the output of "grep . /sys/class/thermal/thermal*/*" when the temperature goes high in both kernels? thanks, rui > > Now I tried going to 5.2-rc4. It behaves the same as 5.2-rc2. Goes up > to 3GHz briefly but then down to 2.0GHz and below under load. > > Ideas welcome. > > Best regards, > > Pavel
