In languages like C, unsynchronized reads and writes to the same memory location from different threads is undefined behavior. But in the CPU, cache coherence says that if one core writes to a memo...

I want to filter some data (100s of MB to a few GBs). The user can change the filters so I have to re-filter the data frequently. The code is rather simple: std::vector<Event*> filteredEven...

Is there an API to get the number of CPUs available in Linux? I mean, without using /proc/cpuinfo or any other sys-node file... I've found this implementation using sched.h: int GetCPUCount() { cp...

I am using Intel(R) Core(TM) i5 CPU M 560 @ 2.67GHz as I found out from cat /proc/cpuinfo. But I want to know exact hierarchy like how many sockets are there, and how many cores are there per socke...

I am trying to detect the current p-state of my cpu. I have noticed that the p-state status MSR (C001_0063) always returns 2 on my ryzen 1700x system, even if the core is clearly not in that state....

I want to create a near 100% load on a Linux machine. It's quad core system and I want all cores going full speed. Ideally, the CPU load would last a designated amount of time and then stop. I'm ho...

I read that the multithreading is the feature that a single core can manage many threads (not in parallel) and the benefit is that the CPU is always working. For the Hyperthreading that a single co...

Ideally I have to find out the CPU usage of pods on each node in percentage. But I have tried to find out the CPU usage of each node. I have written the query but it gives me more than 100 % (it ca...

How can I get the current system status (current CPU, RAM, free disk space, etc.) in Python? Ideally, it would work for both Unix and Windows platforms. There seems to be a few possible ways of ext...

I have a Node app deployed on AWS Fargate on the 1 vCPU/2GB memory task config. I have been wondering about the behavior that Node.js has when running on this setup in relationship to the vCPUs tha...

Sometimes you need to know how much memory does your program need during it's peak, but might not care a lot about when exactly this peak occurs and how long etc. Pytorch has this nice tool for rep...

This is the original tests. The figure shows that CPU=8 in Intel Core i9-12900K has the fastest access to all other cores. Therefore, I am wondering what makes it happen. Besides, I am also curious...

I have the VirtualBox installed on my Macbook Pro, and I want to install a linux VM on VirtualBox. When I launched the new VM, it prompts that "Your CPU does not support long mode. Use a 32bit dist...

(The question is not specific to three.js but I will use it as an example) I have been using three.js to develop a web app interface lately and written some nice fallback between WebGL and Canvas ...

I just want to share a small script that I made to enhance the docker stats command. I am not sure about the exactitude of this method. Can I assume that the total amount of memory consumed by the...

Before you laugh at me: I want to ask arithmetic operation is done in ALU unit or accumulator. I read a book it says accumulator is a register for doing arithmetic. This Accumulator said Withou...

How many instructions on zen 3 CPUs are exclusive to AMD? I am aware of only 3: mwaitx, monitorx, and clzero Also, the 3DNow! and lwp instruction sets were once AMD exclusive but they have since be...

I have recently installed tensorflow (Windows CPU version) and received the following message: Successfully installed tensorflow-1.4.0 tensorflow-tensorboard-0.4.0rc2 Then when I tried to run im...

for example AMD Ryzen 5 1600 has 6 (2 logical cores per physical) cores with Clockspeed: 3.2 GHz Turbo Speed: 3.6 GHz . In contrast, Intel Core i5-7600 has 4 cores with Clockspeed: 3.5 GHz Turbo S...

I want to get the CPU temperature. Below is what I've done using C++ and WMI. I'm reading MSAcpi_ThermalZoneTemperature, but it's always the same and it's not the CPU temperature at all. Is there...

Assuming that I have a CPU with 4 cores and 4 threads, does it make sense to run e.g. 8 PHP-FPM workers by setting pm.max_children = 8 option? As far as I'm concerned, CPU with 4 threads can only r...

Is anyway (any function etc) to show CPU cores utilization in MATLAB in a GUI likes that we have in Task Manager of windows (Performance Tab)? Thanks.

In the book Computer Systems: A Programmer's Perspective, the Exercise 5.5 shows a piece of code to compute the value of a polynomial double poly(double a[], double x, int degree) { long in...

What is the best way to do programming for GPU? I know: CUDA is very good, much developer support and very nice zo debug, but only on NVidia Hardware OpenCL is very flexible, run on NVidia, ...

I know store buffer and invalidate queues are reasons that cause memory reordering. What I don't know is if Out-of-Order-Execution can cause memory reordering. In my opinion, Out-of-Order-Execution...