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CPU throttling in C++

By : Jouvent
Date : July 28 2020, 10:00 AM
it helps some times I am not aware of any API to do get the OS's scheduler to do what you want (even if your thread is idle-priority, if there are no higher-priority ready threads, yours will run). However, I think you can improvise a fairly elegant throttling function based on what you are already doing. Essentially (I don't have a Windows dev machine handy):
Pick a default amount of time the thread will sleep each iteration. Then, on each iteration (or on every nth iteration, such that the throttling function doesn't itself become a significant CPU load),
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Is there any way of throttling CPU/Memory of a process?

By : AykutBulut
Date : March 29 2020, 07:55 AM
I wish this help you The platform SDK used to come with stress tools for doing just this back in the good old days (STRESS.EXE, CPUSTRESS.EXE in the SDK), but they might still be there (check your platform SDK and/or Visual Studio installation for these two files -- unfortunately I have niether the PSDK nor VS installed on the machine I'm typing from.)
Other tools:

How to control cpu throttling on android

By : Sabarish
Date : March 29 2020, 07:55 AM
it helps some times It turns out to be a thermal problem. As the app is running the android battery temperature is rising. At 48 degrees android os has throttled down the cpu from 1.4 Ghz to 0.8 Ghz.

Throttling CPU from within Java

By : Yan Li
Date : March 29 2020, 07:55 AM
Does that help Really interesting thread. I found out Java does not provide means for doing what I want to do, and the only way to do this is from outside the JVM. I ended up using nice to alter the scheduling priority in my test (Linux) environment, will still need to find something similar for WIn-based OSs.
Everyone's intervention has been much appreciated.

Do I need to have CPU throttling turned off just to build ATLAS or all the time?

By : user2933271
Date : March 29 2020, 07:55 AM
hop of those help? You only have to turn it off during the installation phase. It interferes with the performance tests and measurements during the install phase.
The related section in the installation guide states:

Pod CPU Throttling

By : Jocelyn Merlaud
Date : March 29 2020, 07:55 AM
it helps some times If you see the documentation you see when you issue a Request for CPUs it actually uses the --cpu-shares option in Docker which actually uses the cpu.shares attribute for the cpu,cpuacct cgroup on Linux. So a value of 50m is about --cpu-shares=51 based on the maximum being 1024. 1024 represents 100% of the shares, so 51 would be 4-5% of the share. That's pretty low, to begin with. But the important factor here is that this relative to how many pods/container you have on your system and what cpu-shares those have (are they using the default).
So let's say that on your node you have another pod/container with 1024 shares which is the default and you have this pod/container with 4-5 shares. Then this container will get about get about 0.5% CPU, while the other pod/container will get about 99.5% of the CPU (if it has not limits). So again it all depends on how many pods/container you have on the node and what their shares are.
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