Re: Program run at startup hogs cpu?

[Benoît Minisini <benoit.minisini@xxxxxxxxxxxxxxxx>]

Le 11/03/2025 à 18:42, Bruce Steers a écrit :
> On Tue, 11 Mar 2025 at 16:43, Benoît Minisini <benoit.minisini@gambas- 
> basic.org <mailto:benoit.minisini@xxxxxxxxxxxxxxxx>> wrote:
>
>     Le 11/03/2025 à 12:17, Bruce Steers a écrit :
>      >
>      > Here's a peculiar problem...
>      > My launcher program Desktop-ish does something strange.
>      >
>      > For some reason the program hogs the cpu , my fans blow hard and the
>      > program uses 98% cpu.
>      >
>      > If i close it then re-run it from the desktop icon it runs fine
>     and does
>      > not hog cpu.
>      > If i do not launch it at startup and just run it from the icon it
>     is okay.
>      >
>      > But for some reason launching it from ~/.config/autostart/ makes
>      > something go loop-de-loo.
>      >
>      > Anyone seen anything like this before?
>      > Know what might cause it,  know what to do?
>      > gmail.txt archive is 600k so I cannot attach.
>      > It's on git though...
>      > git clone https://gitlab.com/bsteers4/desktop-ish.git <https://
>     gitlab.com/bsteers4/desktop-ish.git> <https://
>      > gitlab.com/bsteers4/desktop-ish.git <http://gitlab.com/bsteers4/
>     desktop-ish.git>>
>      >
>      > Respects
>      > BruceS
>
>     Use 'gdb' to know where the infinite loop is:
>
>     $ sudo gdb gbr3 <process id of my program>
>     ...
>     (gdb) bt
>     (gdb) p DEBUG_get_current_position()
>
>     And send the result of the two last gdb commands.
>
>     Regards,
>
>     -- 
>     Benoît Minisini.
>
>
> Thanks Benoit...
> (gdb) bt
> #0  0x00007ebbe051b4cd in __GI___poll (fds=0x5852867fdf90, nfds=6, 
> timeout=229) at ../sysdeps/unix/sysv/linux/poll.c:29
> #1  0x00007ebbdd76466e in ??? () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
> #2  0x00007ebbdd704a53 in g_main_context_iteration () at /lib/x86_64- 
> linux-gnu/libglib-2.0.so.0
> #3  0x00007ebbdddfec19 in gtk_main_iteration () at /lib/x86_64-linux- 
> gnu/libgtk-3.so.0
> #4  0x00007ebbdebc7ae5 in MAIN_do_iteration 
> (do_not_block=do_not_block@entry=false) at main.cpp:703
> #5  0x00007ebbdebc7b2e in hook_loop () at main.cpp:579
> #6  0x0000585246e395ff in main (argc=<optimised out>, argv=<optimised 
> out>) at gbx.c:520
> (gdb) p DEBUG_get_current_position()
> $1 = 0x585246e9102d "?"
> (gdb)
>
> On closer inspection it does not start at high cpu usage it slowly 
> steadily increases until eventually maxed out.
>
> Respects
> BruceS

Then it may be a watched file descriptor that triggers again and again. 
I have fixed a bug relatively to that behaviour in Gambas 3.20.2.

--
Benoît Minisini.