On Sun, Aug 6, 2017 at 3:57 PM, Pau Freixes <pfrei...@gmail.com> wrote: > Hi guys, > > I would appreciate any feedback about the idea of implementing a new > load function to ask about how saturated is your reactor.
Hi, Would it be possible for you to rephrase what you've done in terms of asyncio terminology? From what I can tell, "reactor" isn't a term used in the asyncio docs or code base. It might also improve the readability of your asyncio patch to use asyncio terminology in the code comments, doc strings, etc. --Chris > > I have a proof of concept [1] of how the load function might be > implemented in the Asyncio python loop. > > The idea is to provide a method that can be used to ask about the load > of the reactor in a specific time, this implementation returns the > load taking into account the last 60 seconds but it can easily return > the 5m and 15minutes ones u others. > > This method can help services built on to of Asyncio to implement back > pressure mechanisms that take into account a metric coming from the > loop, instead of inferring the load using other metrics provided by > external agents such as the CPU, load average u others. > > Nowadays exists some alternatives for other languages that address > this situation using the lag of a scheduler callback, produced by > saturated reactors. The most known implementation is toobusy [2] a > nodejs implementation. > > IMHO the solution provided by tobusy has a strong dependency with the > hardware needing to tune the maximum lag allowed in terms of > milliseconds [3]. in the POF presented the user can use an exact value > meaning the percentage of the load, perhaps 0.9 > > Any comment would be appreciated. > > [1] > https://github.com/pfreixes/cpython/commit/5fef3cae043abd62165ce40b181286e18f5fb19c > [2] https://www.npmjs.com/package/toobusy > [3] https://www.npmjs.com/package/toobusy#tunable-parameters > -- > --pau > _______________________________________________ > Async-sig mailing list > Async-sig@python.org > https://mail.python.org/mailman/listinfo/async-sig > Code of Conduct: https://www.python.org/psf/codeofconduct/ _______________________________________________ Async-sig mailing list Async-sig@python.org https://mail.python.org/mailman/listinfo/async-sig Code of Conduct: https://www.python.org/psf/codeofconduct/
