Re: Emacs [scratch/igc 6682d0e6c96] crash on Linux 6.6.41 KDE 6.0.5, wayland

[execvy@gmail.com]

> That's still a very large size for the initial generation, in
particular.  May I ask why you decided to do that? 

When I living in Emacs, I like long press `j` (evil-next-line) and `k` (evil-previous-line) to move around the code.
In master build, long press `j` and `k` are very smooth.
But in mps build, long press `j` and `k` can feel frequent brief pauses. 

So I tested whether increasing the number in `mps_gen_param_s` would make long-pressing `j` and `k` smoother. After the test, it did help, but I still feel pauses when long-pressing `j` and `k`.


> Are we sure that it's GC causing this?  I assume control + right click
shows a buffer menu, so it builds a list of all buffers, and you have a
lot of them...

No, I think the ctrl + right click is not related to GC.




On 9/3/24 6:57 PM, Pip Cet <pipcet@protonmail.com> wrote:
> <execvy@gmail.com> writes:
> 
> > After I change `mps_gen_param_s gens[] = { { 128000, 0.8 }, { 5 * 128000, 0.4 } };`
> > to `mps_gen_param_s gens[] = { { 12800000, 0.8 }, { 5 * 12800000, 0.4 } };`, the Emacs never crash again.
> 
> That's still a very large size for the initial generation, in
> particular.  May I ask why you decided to do that?  I think for
> interactive use, you want to keep the initial generation reasonably
> small.
> 
> > And it's RES mem is 2661M, I think it's good, I'm editing 2000 rust files in Emacs with rust-analyzer lsp server. 99% of time I don't feel GC's lag.
> > But, When I hit `Ctrl + right click`, I feel a very long GC lag ( > 10 seconds). It's reproducible.
> 
> Are we sure that it's GC causing this?  I assume control + right click
> shows a buffer menu, so it builds a list of all buffers, and you have a
> lot of them...
> 
> I've played around a little creating 10,000 buffers and showing the
> buffer menu, and there does appear to be some lag, but this is true both
> with and without MPS.  I also tried a build with --with-x-toolkit=no,
> and that seemed to have less lag.
> 
> > So I profiler-start, then `Ctrl + right click`, then `profiler-stop`, got:
> > ```
> >         14726  58%   Automatic GC
> >         10528  41% - help-command-error-confusable-suggestions
> >         10528  41%  - debug
> >         10528  41%   - recursive-edit
> >           391   1%    - substitute-command-keys
> 
> I cannot tell from this whether MPS was called once and took a very long
> time to run, or was called many times and the problem lies elsewhere.
> 
> Does the problem happen with the default generation sizes?
> 
> Pip
> 
>