An NTP server that Keeps It Simple, Stupid https://github.com/moparisthebest/kiss-ntpd
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+rsntp+ is an experimental high-performance NTP server written in Rust. It does
not implement a full NTP client and relies on another NTP client and server to
be running on the system instead. It periodically updates its state to mirror
the real NTP client/server and uses multiple threads to serve the current
By default, +rsntp+ uses one thread for IPv4 and another for IPv6. In order to
get the best performance, it's necessary to increase the number of threads
using the +--ipv4-threads+ and +--ipv6-threads+ options to correspond to the
number of CPU cores available on the system.
The real NTP client/server needs to be configured to listen on 127.0.0.1 on
port 11123 (or another port if specified with the +--server-addr+ option). For
instance, the following configuration should work with +chronyd+:
The following table shows the maximum number of NTP requests handled per second
measured on a Linux (4.16) machine with an Intel E5-1220 CPU (4 cores) and an
Intel I350 network card (1 Gb/s).
| 1 thread | 430 kpps
| 2 threads | 750 kpps
| 3 threads | 1030 kpps
| 4 threads | 1100 kpps (maximum for 1 Gb/s)