cpufreq | System Monitor and Power Manager | Monitoring library
kandi X-RAY | cpufreq Summary
kandi X-RAY | cpufreq Summary
CPUFreq is a lightweight CPU scaling monitor and powerful CPU management tool. The extension is using Linux kernel to collect information and manage power governors, frequencies etc. It needs root permission to able changing governors.
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QUESTION
I'm trying to run only:
...ANSWER
Answered 2021-Jun-09 at 16:46Only certain processors and architectures support reading or adjusting the frequency. See https://superuser.com/questions/533507/how-can-i-manually-set-the-cpu-frequency . In addition to processor support, the kernel has to be configured for it as well, and CentOS 7 is an antique.
FOLLOWUP
The only practical method for doing this on Windows is to use the BIOS.
Now, let me make a speech. The processor vendor, the system OEM, and and the operating system vendor have a very strong incentive to give you the best possible performance. The power and clock management modules in your chip and your operating system are ENORMOUSLY complicated. You cannot imagine the tens of thousands of lines of code involved here. They are using inputs based on system load, chip temperature, fan speed, and power usage, and feeding those into time-based formulas that adjust the frequency automatically. In some cases, the frequency is adjusted tens or hundreds of times per second. I'm not sure what you might be planning, but much like dinking with priorities and thread affinity, ANYTHING YOU DO IS JUST GOING TO MAKE THINGS WORSE. If you're a hard-core gamer, then you've enabled BIOS-based overclocking and added an aftermarket cooling system to support that, but playing with frequencies on the fly is counter-productive.
QUESTION
I run my Android app (based on Java), and it works. Next, I add to my app code:
FirebaseFirestore fdb = FirebaseFirestore.getInstance();
This code I got from the official Android site https://firebase.google.com/docs/firestore/quickstart
App runs, but next the running device shows the message "app has stopped".
I use a device simulator available in Android Studio.
It is my first Android app, and I can't understand what is going.
----Trace------ 2021-06-08 20:57:30.186 7155-7155/? D/AndroidRuntime: >>>>>> START com.android.internal.os.RuntimeInit uid 2000 <<<<<< 2021-06-08 20:57:30.188 7155-7155/? D/AndroidRuntime: CheckJNI is ON 2021-06-08 20:57:30.210 7155-7155/? W/art: Unexpected CPU variant for X86 using defaults: x86 2021-06-08 20:57:30.214 7155-7155/? D/ICU: No timezone override file found: /data/misc/zoneinfo/current/icu/icu_tzdata.dat 2021-06-08 20:57:30.229 7155-7155/? E/memtrack: Couldn't load memtrack module (No such file or directory) 2021-06-08 20:57:30.229 7155-7155/? E/android.os.Debug: failed to load memtrack module: -2 2021-06-08 20:57:30.230 7155-7155/? I/Radio-JNI: register_android_hardware_Radio DONE 2021-06-08 20:57:30.239 7155-7155/? D/AndroidRuntime: Calling main entry com.android.commands.am.Am
...ANSWER
Answered 2021-Jun-09 at 03:39At the end of your log, just before the initial crash. there is a warning:
Default FirebaseApp failed to initialize because no default options were found. This usually means that com.google.gms:google-services was not applied to your gradle project.
simply adding com.google.gms:google-services should fix any issues you have, if you have issues, ensure your Gradle cache is cleared or run without the build cache
--no-build-cache
QUESTION
I want to change the CPU frequency scaling governor on my Google Cloud instance running Linux.
The usual way of setting it
echo performance | sudo tee /sys/devices/system/cpu/cpu*/cpufreq/scaling_governor
Doesn't work because the cpufreq folder does not exist (Inside cpu0/cpu1/cpu2/cpu3/cpu).
Tried installing cpufrequtils but still the folder did not show up. So is it that Google doesn't want too much power consumption from high CPU usage and disables it?
...ANSWER
Answered 2021-Mar-19 at 17:41You are running in a virtualized environment. You cannot control the underlying hardware.
QUESTION
I am getting the below error 50% of the time during startup on an STM32 based processor (OSD32MP15x).
I've tried over 40 versions configs and setups none work and I am under high pressure to deliver this piece of hardware to a client. To me this looks like some kind of timing issue because it doesn't always happen.
I've tried to disable USB related configs, change DTS files and strip out everything that is not needed and last but not least change power config in the linux config and DTS.
Questions: How can I debug the below? What does this error look like to you?
...ANSWER
Answered 2020-Nov-04 at 18:22It looks like the problem was introduced by the patch: regulator: stpmic1: Usb boost over-current protection workaround.
- The "boost" interrupt handler
stpmic1_boost_irq_handlercallsregulator_lock(usb_data->boost_rdev); - The "boost" interrupt handler (
stpmic1_boost_irq_handler) is set up by thestpmic1_boost_registerfunction, butusb_data->boost_rdevis still null at this time. usb_data->boost_rdevis set to the return value of thestpmic1_boost_registerfunction by thestpmic1_regulator_probefunction.- If the "boost" interrupt handler
stpmic1_boost_irq_handlergets called beforeusb_data->boost_rdevhas been set by thestpmic1_regulator_probefunction, then the crash occurs.
A workaround would be to set usb_data->boost_rdev = rdev; in the stpmic1_boost_register function after it has set rdev but before it sets up the interrupt handler.
This should be reported to the author of the patch. See the "Signed-off-by:" line in the patch for the email address.
QUESTION
I have this script to grab the current cpu speed of a RPi
...ANSWER
Answered 2020-Oct-03 at 10:21With GNU awk:
QUESTION
In the dts file of my kernel, I have:
...ANSWER
Answered 2018-Nov-15 at 19:17I'm not totally sure if it's generic or specific to my ARM device, but I figured out by reading commit comments that the number (1, 4, 10) correspond to throttle of the CPU only in ondemand mode. In my particular case, those numbers represent a measure of throttle in 100MHz. Therefore, 10 means that the CPU is throttle at 1GHz less than its maximum frequency.
QUESTION
I have created a WebView app which is suppose to open a new WebView popup window on request. It works fine on the first try but after wards, the app crashes. The app crashes on the second attempt to call a new window and i keep getting the below error message
My Logcat
...ANSWER
Answered 2020-Feb-03 at 16:15In the code above, create a new instance of newWebView for each popup window.
You cannot reuse the same newWebView every time.
QUESTION
I am using the USRP N210 through a Debian (4.19.0-6-amd64 #1 SMP Debian 4.19.67-2+deb10u1) VM and run very quickly into processing overflow. GnuRadio-Companion is printing the letter "D" the moment one of the CPUs load is reaching 100 %. This was tested by increasing the number of taps for a low-pass filter, as shown in the picture with a sampling rate of 6.25 MHz.
I have done all instructions on How to tune an USRP, except the CPU governor. This is because I am not able to do this due to a missing driver reported by cpufreq-info. The exact output is
No or unknown cpufreq driver is active on this CPU.
The output of the lscpu command is also shown in a picture.
Has anyone an idea how I can resolve the problem? Or is GnuRadio just not fully supported for VMs?
...ANSWER
Answered 2020-Jan-15 at 19:15Dropping packets when your CPU can't keep up is expected. It's the direct effect of that.
The problem is most likely to be not within your VM, but with the virtualizer.
Virtualization adds some overhead, and whilst modern virtualizers have gotten pretty good at it, you're requesting that
- an application with hard real-time requirements runs
- under high network load.
This might take away CPU cycles on your host side that your VM doesn't even know of – your 100% is less than it looks!
So, first of all, make sure your virtualizer does as little things with the network traffic as possible. Especially, no NAT, but best-case hardware bridging.
Then, the freq-xlating FIR definitely isn't the highest-performing block. Try using a rotator instead, followed by an FFT FIR. In your case, let that FIR decimate by a factor of 2 – you've done enough low-pass filtering to reduce the sampling rate without getting aliases.
Lastly, might be a good idea to use a newer version of GNU Radio. In Debian testing, apt will get you a 3.8 release series GNU Radio.
QUESTION
Note: exhaustive system details are given at the end of the question.
I am trying to get my development machine to have a very stable CPU frequency so that I can get precise benchmarks of some linear algebra codes - however, it still displays significant frequency fluctuations.
I have set scaling governor to performance mode:
ANSWER
Answered 2019-Aug-25 at 23:19One case not mentioned in your post is Intel's turbo boost. You can disable it by writing 1 to /sys/devices/system/cpu/intel_pstate/no_turbo. This setting is also available in BIOS, but I'm not sure if the effects are 100% equivalent.
QUESTION
I created a fresh virtual environment: virtualenv -p python2 test_venv/
And installed tensorflow: pip install --upgrade --no-cache-dir tensorflow
import tensorflow gives me Illegal instruction (core dumped)
Please help me understand what's going on and how I can fix it. Thank you.
CPU information: ...ANSWER
Answered 2018-Sep-14 at 08:22I would use older version. Looks like your CPU does not support AVX instructions.
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