Re: MPS command line parameters

[Pip Cet <pipcet@protonmail.com>]

"Eli Zaretskii" <eliz@gnu.org> writes:

>> From: Helmut Eller <eller.helmut@gmail.com>
>> CC: emacs-devel@gnu.org, Gerd Möllmann
>>  <gerd.moellmann@gmail.com>
>> Date: Fri, 16 Aug 2024 09:32:14 +0200
>>
>> The patches below add a command line option to configure MPS.  It can be
>> used like
>>
>>   emacs --igc-param pause_time=INF \
>>         --igc-param gen_params=64000k80%,256000k20% \
>>         --igc-param commit_limit=1000000000
>
> Is there any way of changing these parameters when Emacs is already
> running?

For most parameters, yes, but the generation chain parameters can only
be set when the pool using them is created.  It's possible, of course,
to create a new pool for new allocations when the parameters change and
use that, but then we'd have to keep track of obsolete pools and that
would complicate things further.

> It is quite un-Emacsy to allow some configuration only via
> the command line.  Also, relatively inconvenient, since you must
> restart Emacs each time you want to change these parameters.

Unfortunately, the generation size settings have a huge influence on
performance, so we might have to implement the pool-switching thing
after all...

Pip