Or is it only me?
top immediately upon starting:
this post was submitted on 26 Apr 2025
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TOP averages out readings from the last few seconds. If there aren't enough samples the displayed values can be⦠off
Well it does make sense that the CPU has to work a bit when loading a new program.
All four cores at 100%? We don't see that kind of spike when we open some other application right? Is it the experience of everyone? Or am I wrong in this?
I mean, maybe. Imagine averaging the usage over a single instruction cycle. Whatever ran that instruction is using 100% of the processor for that time period.
That first data point is simply invalid. Ignore it. Monitoring software usually report some kind of statistic (mean, median, min/max, etc) taken from measurements over a period of time instead of the instantaneous value when the report is updated. But they can't do that for the first data point when the application is launched because there's no time period over which to measure it.
Lim t->0 x/t =infinity when x>0
Math - not even once.
I paid for all the cores, I'm gonna use all the cores!
Unless bottlenecked somewhere else, we would want to see 100 % with everything that takes more than some milliseconds.
This is the real answer. Other apps might be bottlenecked by IO so the CPU doesnβt work as hard. Get faster disks, the CPU will see more use. Since top is so small that it loads into memory almost instantly, and has no need for further IO, the CPU is free to spin all the way!
People get worked up when CPU usage is high, but unless thereβs a resource leak somewhere, that just means the computer is working at full efficiency.
Top revs the engine as a test /s
It's like when the boss walks in so everybody becomes visibly busy. Never want to look like you could be the couple pennies shaved off the budget when management bonus calculation time comes around.
Absolutely. That's why race to idle is a thing. As soon as the CPU is fed cycles it races to complete the task as quickly as possible. When the program first launches and starts monitoring the only thing it knows is that it was just doing something. It hasn't had a change to not do something. It's now completed its race and now it's able to relax for a second and idle.
It's going to be an artifact of the data collection method. The sample size is extremely small and taken during the period where top has never stopped running.
Same happens opening Windows Task Manager, my older server rig used to lock up frequently, stalling programs like Home Assistant, and the only thing I had to do to fix it was remote in and open Task Manager. CPU usage dropped to between 70% and 30%.
This, incidentally, was why I was convinced I needed better hardware for a dedicated Proxmox rig. I was very wrong. With Windows, I can barely run three services (HA, AgentDVR, Emby) alongside their stupid NTFS scan and antivirus. With Proxmox I can run 20 services with no issue. CPU is usually 60%-70% with everything.
I'm running like 18 machines inside of hyper-v and don't have that problem. Were you using a consumer version of windows or something?
Yes aha, Windows 10 Home, 22H2 update. Only Windows OS I owned and this was before I tried Linux
Yeah that explains it lol. Fwiw, if you ever want to try windows as a hypervisor again, server editions can run for 180 days on a trial license and you can buy legit product keys from dodgy resellers online for like $10. I'd go that route for running any kind of real services.
btop ftw
btop is nice and I use it sometimes; but htop, my beloved, doesn't complain about the screen size being too small. And it's more visual for me anyways.
yeah htop is useful on a phone
btw to format inline code blocks, put a single backtick on each side of the code, like this: btop.
How dare you call my laptop a "phone" /s
(btop on the left)
Also, thanks for the tip, I just used voyager's formatting cause I was on my phone :'D
I like the color scheme of the buttons in the top right
That's a very nice desktop.
Can't wait for zztop
Wasn't htop abandoned?
It was, but it's been back for some years now
Oh neat, thanks! I didn't hear that someone took it up again.
btm ftw
glances Btw
Same, but if you haven't aliased top to btm --battery you're not really living
You guys hate GUI, don't you?
No but sometimes you're in a terminal anyway and its trivial to pop open a new tab and run an arbitrary command. It isn't that we hate GUI; TUI/CLI is just objectively faster for a lot of things.
Sometimes you have a runaway process sucking up another gigabyte of your swap every second and you don't have a chance in hell of bringing up some kind of system management gui
Looking at you, BattleBit.exe
sometimes you're in terninal anyway
Said confidently Fully Casual Personal Computational Machine Operator
No, but I don't see the value in using the GUI for something that can be gotten with less complexity and overhead.
You're dyslexic, aren't you?