simple-mon.lua

local fiber = require 'fiber'
local clock = require 'clock'
local fun   = require 'fun'

require 'jit'.on()
fiber.top_enable()

local COLLECT_INTERVAL = 1
fiber.create(function()
	fiber.name("monitor")
	fiber.yield()

	local prev = {}
	local tx_time = clock.thread()

	while true do
		local cpu = fiber.top().cpu
		local info = fiber.info({ bt = false })

		local fids = fun.totable(info)
		table.sort(fids)

		print("------------------------------------------------------")

		local run_diff = 0

		-- collect sched
		if prev[1] then
			local diff = cpu['1/sched'].time - prev[1]
			print(1, "sched", 1000*diff)
			run_diff = run_diff + diff
			prev[1] = cpu['1/sched'].time
		end
		prev[1] = cpu['1/sched'].time

		for _, fid in ipairs(fids) do
			local finfo = info[fid]
			local cpu_time = cpu[fid..'/'..finfo.name]
			cpu_time = cpu_time and cpu_time.time or finfo.time
			if prev[fid] then
				local diff = cpu_time - prev[fid]
				run_diff = run_diff + diff
				print(fid, finfo.name, 1000*diff)
			end
			prev[fid] = cpu_time
		end

		local current_tx = clock.thread()
		print("tx ", "tx", 1000*(current_tx-tx_time))
		print("diff", "diff", 1000*run_diff)
		tx_time = current_tx

		fiber.sleep(COLLECT_INTERVAL)
	end
end)

stdout.txt

------------------------------------------------------
1       sched   0.140917
101     lua     0
102     on_shutdown     0
104     monitor 0.141165
tx      tx      5.803333
diff    diff    0.282082
------------------------------------------------------
1       sched   0.122536
101     lua     0
102     on_shutdown     0
104     monitor 0.283506
tx      tx      4.337542
diff    diff    0.406042
------------------------------------------------------
1       sched   0.122907
101     lua     0
102     on_shutdown     0
104     monitor 0.088674
tx      tx      5.346792
diff    diff    0.211581
------------------------------------------------------
1       sched   0.06869
101     lua     0
102     on_shutdown     0
104     monitor 0.10689
tx      tx      2.858416
diff    diff    0.17558
------------------------------------------------------
1       sched   0.075669
101     lua     0
102     on_shutdown     0
104     monitor 0.146545
tx      tx      2.934209
diff    diff    0.222214
------------------------------------------------------
1       sched   0.072609999999999
101     lua     0
102     on_shutdown     0
104     monitor 0.120014
tx      tx      2.692958
diff    diff    0.192624
------------------------------------------------------
1       sched   0.070706
101     lua     0
102     on_shutdown     0
104     monitor 0.066752999999999
tx      tx      2.690458
diff    diff    0.137459
------------------------------------------------------
1       sched   0.077798
101     lua     0
102     on_shutdown     0
104     monitor 0.185081
tx      tx      2.880042
diff    diff    0.262879