> > + * The worker MPM should not accept more connections than it
> > + currently has available workers. Instead, the listener thread
> > + should block on a condition of the fdqueue such that it waits
> > + until there are at least one idle worker before continuing
> > + into the accept-loop.
>
> Here is an alternate idea... keep track of the number of available workers with a
counter.
> If the accept loop detects that the number of available workers has dropped to 0, the
> accept thread simply yields it's quanta. Very simple and no overhead associated with
>a
> condition variable. Something like this:
>
> if (!avail_workers) {
> yield(); /* or what ever the Unix call is. I know there must be one */
> continue;
> }
> else {
> accept();
> }
>
> Bill
Forgot to mention what is probably obvious... this is not a perfect solution because of
race conditions between the threads incrementing/decrementing avail_workers and the
listener thread doing the checking. It narrows the exposure but does not eliminate it
entirely.
Bill
