On Thu, Jul 13, 2017 at 9:15 PM, Chifeng Chou <cfc...@gmail.com> wrote:
>
> I implemented a weighted fair queue using a naive approach which is giving
> different amount of attempts according to weights to access upstreams.
> However, when calls of fetch() come very fast, our internal sync constructs
> are not ready(when select) and many attempts are simply wasted.
> It seems that Go's scheduler steps in, therefore the results of many
> scenarios are not always predictable.
>
> The involvement of Go's scheduler seems unavoidable. So is it innately unfit
> to implement WFQ in this way?

I don't understand why you are using a select statement with a default case.

Just use the comma-ok form to read from the channel, as in
https://play.golang.org/p/OqK0nELGcX .

Ian

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