31–40 of 41 posts
what are units of load average?
Load of 0 means idle (nothing to run), load of 1 means e.g. one process running and nothing in the queue.
what are units of load average?
I can't think of a good way to put it without just giving examples, so here goes: 1.0 = 100% usage of a 1-core system 1.0 = 50% usage of a 2-core system 4.0 = 50% usage of an 8-core system 8.0 = 100% usage of an 8-core system And IIRC, load average is represented usually as 3 numbers, which are over the last 5, 10, and 15 minutes.
1, 5 and 15 minutes is the most common intervals
I love htop. But I can't figure out a way to disable the CPU monitors. I use a machine with 768 cores which makes it kind of useless.
If you don't mind me asking what kind of machine has 768 cores?
The idea is that you can run embarrassingly parallel workflows without needing to recode for a GPU; just launch processes with appropriate affinities. NERSC has compute clusters with thousands of these beasts. They make astronomers very happy.
Htop is great! One thing not mentioned in the article is you can interact with htop using the mouse, for example clicking on column headers to sort by that column, or selecting a process. You can get get this mouse support for example by installing the gpm package, which enables the mouse support for the terminal.
Earlier quoted context omitted.
I can't think of a good way to put it without just giving examples, so here goes: 1.0 = 100% usage of a 1-core system 1.0 = 50% usage of a 2-core system 4.0 = 50% usage of an 8-core system 8.0 = 100% usage of an 8-core system And IIRC, load average is represented usually as 3 numbers, which are over the last 5, 10, and 15 minutes.
> And IIRC, load average is represented usually as 3 numbers, which are over the last 5, 10, and 15 minutes 1, 5 and 15 minutes is the most common intervals
As a consequence of trying htop after a long time, I got a reminder that VIRT is not related to RES. I noticed Libreoffice Calc with 29.7 GB of virtual memory and only 198 MB actually used. I wonder why LO made a malloc of nearly 30 GB, but memory is cheap especially because it's virtual. The next one on the list is Firefox with 8.5 GB VIRT and 994 MB RES. By the way, I've got 16 GB of RAM and no swap. Anyway all tha…
I love htop. But I can't figure out a way to disable the CPU monitors. I use a machine with 768 cores which makes it kind of useless.
I love htop. But I can't figure out a way to disable the CPU monitors. I use a machine with 768 cores which makes it kind of useless.
Open `~/.config/htop/htoprc` and modify the line: left_meters=AllCPUs Memory Swap to be left_meters=CPU Memory Swap That will replace the default CPU monitor with a single meter for the average across all cores. After that, you'll be able to customize things the standard way by pressing F2 within htop.
Earlier quoted context omitted.
If you don't mind me asking what kind of machine has 768 cores?
Likely a machine with a group of Xeon Phi coprocessors, each a PCI card containing 64 fully-capable x86 cores: https://www-ssl.intel.com/content/www/us/en/processors/xeon/... The idea is that you can run embarrassingly parallel workflows without needing to recode for a GPU; just launch processes with appropriate affinities. NERSC has compute clusters with thousands of these beasts. They make astronomers very happy.