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Re: RFC: Allow emergency EH pool size to be controlled (for stage 1)
On 13 December 2016 at 16:52, Richard Biener <richard.guenther@gmail.com> wrote:
> On Tue, Dec 13, 2016 at 3:45 PM, Ville Voutilainen
> <ville.voutilainen@gmail.com> wrote:
>> On 13 December 2016 at 16:42, Richard Biener <richard.guenther@gmail.com> wrote:
>>> Also maybe N should be the number of exception objects rather
>>> than bytes? Otherwise a target independent N is hard to specify
>>> for say, a distribution that wants either a different default or a
>>> static buffer.
>>
>>
>> But how to specify the number of exception objects that may have
>> different sizes?
>
> We have EMERGENCY_OBJ_SIZE for this (yeah, some guesstimate)
> which can be easily target configured in libstdc++ itself. We possibly
> should split it into a sizeof () of the exception header plus some
> payload guesstimate.
Ah, yes, that's what the patch does with the default-size when there
is nothing in the environment to customize
the value. Makes sense.
I don't know whether a separate byte-wise count would be useful, I
must admit I have no field experience with such
tunings.