GNU bug report logs - #79346
igc: PolicyShouldCollectWorld

Previous Next

Full log

Message #59 received at 79346 <at> debbugs.gnu.org (full text, mbox):

From: Helmut Eller <eller.helmut <at> gmail.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: gerd.moellmann <at> gmail.com, 79346 <at> debbugs.gnu.org
Subject: Re: bug#79346: igc: PolicyShouldCollectWorld
Date: Fri, 05 Sep 2025 19:08:09 +0200

On Fri, Sep 05 2025, Eli Zaretskii wrote:

[...]
>> It seems to me that the arena pause_time parameter must be tuned
>> together with the size(s) of the generation(s).  Smaller generations
>> require shorter pause_times.  I gravitate towards 10MB for the first
>> generation and 10 milliseconds pause time.  My feeling is that something
>> in the order of 10MB should work better than 100MB.  Of course, this
>> requires measurements to be sure.
>
> Not sure if I make sense,

No, you don't :-)

> but 10 ms of pause for GC sounds an awful
> lot to me.

The current value of the parameter is 100ms.

> Would 1 ms or 2 ms be reasonable?  They should be imperceptible.

That probably below MPS's sweet spot.  In my limited experiments, 16MB
with 10ms had the lowest overhead.

Helmut

Previous Next

GNU bug tracking system
Copyright (C) 1999 Darren O. Benham, 1997,2003 nCipher Corporation Ltd, 1994-97 Ian Jackson.