What's wrong with you, Linux developers?

You are, for the most part, university students or graduates, but you write code which is worse than troll's snot. I mean, 30-40% CPU load when copying a file to another machine across the network. Are you for real? On a Windows machine with an antivirus it only takes around 10% CPU to copy the same file. And mind you, that Windows host runs on a 2 core CPU, while the Linux host has 4 cores, so its figure has to be cut in half for an honest comparison. Windows 7 outperforms Linux Fedora 26 by 6-8x times. These are physical cores, so do not even dare to bring up the topic of HT.

What's wrong with you? Ever heard of DMA? Or are you still using CPU to read, write and move around byte arrays? Or maybe you are copying byte by byte because you never heard of MMX, SSL and 3DNow? FFS, this is becoming absurd, if in 2018 I need 30-40% of a 4-core 3 GHz CPU to send a file across a 1 Gbit network at 60-80 MB/s sustained rate.

It suddenly dawned on me during this experiment that I am reading from an encrypted partition in Linux, so I stopped and attached another hard disk, formatted it to ext4 without encryption, created another test file on it and re-run the test. This is where I got 30-40%, as when it was from an encrypted partition I was getting 40-60% CPU load.

Linux is a fucking joke if in 2018 one file transfer can choke almost 2 cores out of 4 by just copying a file. This is so bad, that I will not even rant about how file transfers still choke Linux by allocating all free RAM to cache and never freeing it if other apps need more RAM. This travesty is going on for 10+ years and I blogged about this long time ago. Not going anymore. The funnyiest part is that copying a file onto a Windows CIFS share never succeeds: there is always an error at the end. Can you, super-intelligent knowing it all Linux developers, who close all my bug reports without resolution and without anyone even looking into them several years later due to "end of life", get anything right?

Posted by: LinuxLies at 10:40 AM | No Comments | Add Comment
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