[knot-dns-users] Feature Request: Workers

Hello knot, I have recently started a long over due migration to knot 2.* and I have noticed that the server.workers config stanza is now split into three separate stanzas [server.tcp-workers, server.udp-workers & server.background-workers]. Although this is great for flexibility it does make automation a little bit more difficult. With the 1.6 configuration I could easily say something like the following workers = $server_cpu_count - 2 This meant I would always have 2 cpu cores available for other processes e.g. doc, tcpdump. With the new configuration I would need to do something like the following $avalible_workers = $server_cpu_count - 2 $udp_workers = $avalible_workers * 0.6 $tcp_workers = $avalible_workers * 0.3 $background_workers = $avalible_workers * 0.1 The above code is lacking error detection and rounding corrections which will add further complexity and potentially lacking itelagence that is available in knot to better balance resources. As you have already implemented logic in knot to ensure cpus are correctly balanced I wonder if you could add back a workers configurations to act as the upper bound used in the *-workers configuration. Such that *-workes defaults: "Default: auto-estimated optimal value based on the number of online CPUs or the value set by `workers` which ever is lower) Thanks John