Issue Updated: Solved my first question about sorting, but now I can’t figure out how to show the correct diagram for the earliest deadline first algorithm with idle times. Here is my code so far: import java.util.*; class deadlineprototype {
Continue readingTag: cpu
[SOLVED] why memcpy is slower than copying data in bytes granularity?
Issue I write three different codes to copy data from a 4GB buffer to another 4GB buffer. I measure their bandwidth and the cache miss with perf stat. The code is shown below: #include<stdio.h> #include<stdlib.h> #include <string.h> #include <time.h> #include
Continue reading[SOLVED] mysql cpu usage is more than system cpu
Issue I have a CentOs server with Plesk, it has a 24 cpu core and 32 GB of RAM. When I use TOP in linux, I see mysql cpu usage is about 200% despite the total system cpu being about
Continue reading[SOLVED] Does Java blocked threads take up more CPU resources?
Issue i would like to ask if Java will utilize more CPU resources when threads are blocked, i.e. waiting to lock a monitor which is currently being locked by another thread. I am now looking at a thread dump whereby
Continue reading[SOLVED] tensorflow using gpu on wsl2 is not learning
Issue I am using Ubuntu 20.04 on wsl2 running on win11. The code to execute is as follows: import tensorflow as tf from tensorflow import keras from keras.layers.convolutional import Conv2D, MaxPooling2D import numpy as np (X_train, y_train), (X_test, y_test) =
Continue reading[SOLVED] segmentation fault (core dumped) while huge number of for loops in c code
Issue the following code caused segmentation fault (core dumped) with 1000000000 times loop. but by reducing the looping time to 100000, it goes ok. so is it causing any thing wrong in cpu, hardware, or anywhere? is it caused by
Continue reading[SOLVED] Does it make sense to run more PHP-FPM children than number of CPU cores?
Issue 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
Continue reading[SOLVED] Why the CPU usage is higher when using OpenCV on C++ than on Python
Issue I am using Ubuntu 20.04.4, and I compiled OpenCV as release mode. Whenever I read frames, it consumes quite a lot of my CPU. I tested this in other machines as well. However, using a very similar script on
Continue reading[SOLVED] Why do we need to compile for different platforms (e.g. Windows/Linux)?
Issue I’ve learned the basics about CPUs/ASM/C and don’t understand why we need to compile C code differently for different OS targets. What the compiler does is create Assembler code that then gets assembled to binary machine code. The ASM
Continue reading[SOLVED] How to get current CPU and RAM usage in Python?
Issue 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 extracting that from
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