Re: on small terminals, irqtop shows "(null)" at startup

On Thu, Mar 20, 2025 at 10:57:50AM +0100, Benno Schulenberg wrote:
> 
> To reproduce, run `xterm -geometry 80x12 &`, and in that xterm
> run `irqtop`.  See that the table of IRQs is empty at first,
> apart from the string "(null)" -- like this:
> 
>    IRQ   TOTAL   DELTA NAME
> (null)

I cannot reproduce this issue. My system:

 $ uname -r
 6.12.11-200.fc41.x86_64

 $ rpm -qf /usr/bin/xterm
 xterm-397-1.fc41.x86_64

> After three seconds a list of IRQs appears.

Please try the current Git. I made small changes to improve the debug
output and to avoid "(null)." However, I'm still not sure why you do
not see the data. 

>    ./irqtop -c disable  2>TRAIL

I do not see anything wrong in the log. The library gets data and
calculates the output as expected.

> on an `xterm -geometry 80x12`, where I've pressed q as soon as
> the table did appear after three full seconds.

Yes, there is a 3-second delay between reloads (use, for example, "-d
0.5" to change it). I'm not sure why you don't see the data the first
time.

    Karel

-- 
 Karel Zak  <[email protected]>
 http://karelzak.blogspot.com