gtop On a system with many cores, only a few are listed

Environment

OS: Ubuntu 16.04 LTS on Packet Type 2A / Cavium ThunderX 96-core ARMv8
Node version: ($ node --version) 4.2.6
gtop version: ($ npm info gtop version) 0.1.5

Description

The system I am using (Packet's Type 2A, a 96-core ARMv8 system) has more cores in it than the gtop display can easily show. A screen shot illustrates:

It looks like if the "CPU" window were floated to the top it could display things better.

Aug 24 '17 04:08 vielmetti

Hi @vielmetti

I don't know how intuitive to draw more than 8 cores in a terminal chart with really low resolution. It was my hobby hacking and I didn't foresee that somebody would actually run it on 96 core machine. :)

Initially, I needed the usage of each core to see how optimized my algorithm is or where I should make things multi thread etc.

I think, after a certain limit, it should only show total CPU percentage. What do you suggest?

Aug 24 '17 13:08 aksakalli

Yeah, the terminal chart is fine, it's got enough resolution to pull out the detail I'm looking for. (It doesn't for some reason show 100% cores though very well).

I'm more thinking of the column on the far right hand side showing CPU number and %. I think there's room on the screen if that column gets longer to overlap it instead of having it go to the back.

Aug 24 '17 14:08 vielmetti

I think there is a lot of value in having the usages available per core in percentage format even with absurdly-high core count, but perhaps not by default. I would say maybe a 'paging' hotkey to scroll through sets of 8 cores at a time would be good, or perhaps put them into their own column that spans two rows such that CPU History and CPU Utilization would be 2 columns on the first row, and Memory and Swap History, Memory, Swap, and CPU Utilization would be on the second row. I personally do a lot of bench-marking with multi-socket systems and pin processes to individual cores, and one of the first metrics I look at is CPU utilization for red-flags, and if the chart doesn't have a colored-Key for the chart representing each core, it would make it less apparent which cores are behaving strangely.

Aug 24 '17 15:08 jsd1710

I’ve got the same problem on my 80 core Xeon based server, maybe it should just wrap?

Oct 04 '17 20:10 alex-taffe

Hi, @aksakalli and many cores guys

I has occur the same problem too with my RYZEN Threadripper 2990WX PC( it has 64 logical cores ).

I think, a paging idea is the simple and good solution. If you implement it then I want an auto paging feature and load sorting feature. A paging feature is switch a page automatic with a timer. And, a sorting feature is sort by an averaged load or a processor index.