[Mod] Time, Lag and Position HUDisplay [poshud]

[orwell]

Hello again,

This is a small server-side mod which displays the following information on a head-up display in the bottom right screen corner:
- Current game time
- Average and maximum lag time (see below)
- Current player position

The "Lag" value is determined by analyzing and averaging the "dtime" value of globalsteps. This value can be used to measure the current server load. The avg value in () is a longer-term average. The max value is constantly decreased by small amounts. This is not synced to the engine's max_lag, because there's no convenient way to get this value.



License: LGPLv2.1
Uses code from minetest_time (kazea's code tweaked by cg72 with help from crazyR and Zeno) and mthudclock (https://gitlab.com/Rochambeau/mthudclock/tree/master, WTFPL)
Depends on nothing.

Download: https://github.com/orwell96/poshud/archive/master.zip
Git: https://github.com/orwell96/poshud

[gpcf]

You can actually get the max_lag, using this hacky code I found here: https://github.com/Pitriss/overridemodp ... ster/munin

Code: Select all

local status = minetest.get_server_status()
local status_splitted = {}
for k, v in string.gmatch(status, "([_%w]+)=([%+%w%.]+)") do
        status_splitted[k] = v
end
local uptime = status_splitted.uptime
local max_lag = status_splitted.max_lag


Another, different problem, is that max_lag is essentially worthless, since it doesn't say that much about actual server lag.

[orwell]

I said, there's no convenient way to get this value. I know this approach, and the original unpublished version of this also used this code. I just didn't want to publish a mod that will likely break somewhen in the future.

[sorcerykid]

Another, different problem, is that max_lag is essentially worthless, since it doesn't say that much about actual server lag.

I developed a mod that measures server lag far more accurately than the max_lag value calculated internally by the engine. (including a variety of different metrics like peak lag, mean short-term lag, mean long-term lag, current lag, etc.). It also has an API for use by mod developers. I kind of put the project on hold due to other things in my life at the moment, but I'll try to get it published soon!

PS. Worth noting is that dtime itself is not a reliable nor accurate method for measuring server lag, because it doesn't always correspond to the elapsed time between server steps (I've performed a variety of tests comparing dtime vs minetest.get_us_time).

[orwell]

So, then, I'm looking forward to that.

[sorcerykid]

Yes, I've made note to send you a PM when it's ready (I might also get your help testing it with your mod if that's okay).

[orwell]

Perfect.