Re: parallel GC only after at least one thread was created?

I think this is the change.  They took a preventive measure in case the
client provides a custom marker procedure which isn't thread-safe.

https://github.com/ivmai/bdwgc/commit/020b05d7d567926a023dc428cde7b6add246cd65

For Gauche, I believe we can start parallel markers safely.


On Wed, Mar 27, 2024 at 10:02 AM Shiro Kawai <[email protected]> wrote:

> It does seem so; when I create the first thread in Gauche, GC spawns a
> bunch of marker threads (bdwgc intercepts pthread_create).
>
> I vaguely remember it wasn't the case before.   I'll check bdwgc history.
>
>
> On Wed, Mar 27, 2024 at 6:10 AM Jens Thiele <[email protected]> wrote:
>
>> Hi,
>>
>> maybe this is a feature, but from "top" it looks like parallel GC only
>> is used after at least one thread was created?
>>
>> No parallel GC:
>>
>> #!/usr/bin/env gosh
>> (use gauche.threads)
>>
>> (define (main args)
>>   (while #t
>>     (gc))
>>   0)
>>
>> looks like parallel GC is used:
>>
>> #!/usr/bin/env gosh
>> (use gauche.threads)
>>
>> (define (main args)
>>   (let1 t (make-thread (lambda() (+ 1 2)))
>>     (thread-start! t)
>>     #?=(thread-join! t))
>>   (while #t
>>     (gc))
>>   0)
>>
>> Greetings,
>> Jens
>>
>>
>> _______________________________________________
>> Gauche-devel mailing list
>> [email protected]
>> https://lists.sourceforge.net/lists/listinfo/gauche-devel
>>
>

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