Re: Suppressing useless wakeups in walreceiver

On Mon, Oct 17, 2022 at 03:21:18PM +0900, Kyotaro Horiguchi wrote:
> Now that I see the fix for the implicit conversion:
>
> L527: + nap = Max(0, (nextWakeup - now + 999) / 1000);
> ..
> L545: + (int) Min(INT_MAX, nap),
>
>
> I think limiting the naptime at use is confusing. Don't we place these
> adjacently? Then we could change the nap to an integer. Or we can
> just assert out for the nap time longer than INT_MAX (but this would
> require another int64 variable. I belive we won't need such a long
> nap, (or that is no longer a nap?)

Yeah, I guess this deserves a comment. I could also combine it easily:

nap = (int) Min(INT_MAX, Max(0, (nextWakeup - now + 999) / 1000));

We could probably just remove the WL_TIMEOUT flag and set timeout to -1
whenever "nap" is calculated to be > INT_MAX, but I didn't think it was
worth complicating the code in order to save an extra wakeup every ~25
days.

--
Nathan Bossart
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