37 lines
1.1 KiB
Elixir
37 lines
1.1 KiB
Elixir
defmodule FarmbotOS.Platform.Target.InfoWorker.CpuUsage do
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@moduledoc false
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use GenServer
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@default_timeout_ms 60_000
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@error_timeout_ms 5_000
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alias FarmbotCore.BotState
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def start_link(args) do
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GenServer.start_link(__MODULE__, args)
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end
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def init([]) do
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{:ok, nil, 0}
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end
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def handle_info(:timeout, state) do
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usage = collect_report()
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if GenServer.whereis(BotState) do
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BotState.report_cpu_usage(usage)
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{:noreply, state, @default_timeout_ms}
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else
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{:noreply, state, @error_timeout_ms}
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end
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end
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def collect_report do
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:erlang.system_flag(:scheduler_wall_time, true)
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stat0 = :lists.sort(:erlang.statistics(:scheduler_wall_time))
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Process.sleep(1000)
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stat1 = :lists.sort(:erlang.statistics(:scheduler_wall_time))
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{active, total} = Enum.zip(stat0, stat1) |> List.foldl({0, 0}, fn {{_, a0, t0}, {_, a1, t1}}, {ai, ti} -> {ai + (a1 - a0), ai + (t1 - t0)} end)
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((active / total) * (:erlang.system_info(:schedulers) + :erlang.system_info(:dirty_cpu_schedulers))) / :erlang.system_info(:logical_processors_available)
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end
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end
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