103 lines
4.1 KiB
C#
103 lines
4.1 KiB
C#
using System.Collections.Generic;
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using System.Diagnostics;
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using System.Linq;
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using System.Threading;
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using System.Threading.Tasks;
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using App.Metrics;
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using Discord;
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using Discord.WebSocket;
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using NodaTime.Extensions;
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using PluralKit.Core;
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using Serilog;
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namespace PluralKit.Bot
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{
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public class PeriodicStatCollector
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{
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private DiscordShardedClient _client;
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private IMetrics _metrics;
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private SystemStore _systems;
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private MemberStore _members;
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private SwitchStore _switches;
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private MessageStore _messages;
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private ILogger _logger;
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public PeriodicStatCollector(IDiscordClient client, IMetrics metrics, SystemStore systems, MemberStore members, SwitchStore switches, MessageStore messages, ILogger logger)
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{
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_client = (DiscordShardedClient) client;
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_metrics = metrics;
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_systems = systems;
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_members = members;
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_switches = switches;
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_messages = messages;
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_logger = logger.ForContext<PeriodicStatCollector>();
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}
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public async Task CollectStats()
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{
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var stopwatch = new Stopwatch();
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stopwatch.Start();
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// Aggregate guild/channel stats
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_metrics.Measure.Gauge.SetValue(BotMetrics.Guilds, _client.Guilds.Count);
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_metrics.Measure.Gauge.SetValue(BotMetrics.Channels, _client.Guilds.Sum(g => g.TextChannels.Count));
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// Aggregate member stats
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var usersKnown = new HashSet<ulong>();
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var usersOnline = new HashSet<ulong>();
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foreach (var guild in _client.Guilds)
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foreach (var user in guild.Users)
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{
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usersKnown.Add(user.Id);
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if (user.Status == UserStatus.Online) usersOnline.Add(user.Id);
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}
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_metrics.Measure.Gauge.SetValue(BotMetrics.MembersTotal, usersKnown.Count);
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_metrics.Measure.Gauge.SetValue(BotMetrics.MembersOnline, usersOnline.Count);
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// Aggregate DB stats
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_metrics.Measure.Gauge.SetValue(CoreMetrics.SystemCount, await _systems.Count());
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_metrics.Measure.Gauge.SetValue(CoreMetrics.MemberCount, await _members.Count());
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_metrics.Measure.Gauge.SetValue(CoreMetrics.SwitchCount, await _switches.Count());
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_metrics.Measure.Gauge.SetValue(CoreMetrics.MessageCount, await _messages.Count());
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// Process info
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var process = Process.GetCurrentProcess();
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_metrics.Measure.Gauge.SetValue(CoreMetrics.ProcessPhysicalMemory, process.WorkingSet64);
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_metrics.Measure.Gauge.SetValue(CoreMetrics.ProcessVirtualMemory, process.VirtualMemorySize64);
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_metrics.Measure.Gauge.SetValue(CoreMetrics.ProcessPrivateMemory, process.PrivateMemorySize64);
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_metrics.Measure.Gauge.SetValue(CoreMetrics.ProcessThreads, process.Threads.Count);
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_metrics.Measure.Gauge.SetValue(CoreMetrics.ProcessHandles, process.HandleCount);
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_metrics.Measure.Gauge.SetValue(CoreMetrics.CpuUsage, await EstimateCpuUsage());
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stopwatch.Stop();
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_logger.Information("Updated metrics in {Time}", stopwatch.ElapsedDuration());
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}
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private async Task<double> EstimateCpuUsage()
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{
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// We get the current processor time, wait 5 seconds, then compare
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// https://medium.com/@jackwild/getting-cpu-usage-in-net-core-7ef825831b8b
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_logger.Information("Estimating CPU usage...");
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var stopwatch = new Stopwatch();
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stopwatch.Start();
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var cpuTimeBefore = Process.GetCurrentProcess().TotalProcessorTime;
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await Task.Delay(5000);
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stopwatch.Stop();
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var cpuTimeAfter = Process.GetCurrentProcess().TotalProcessorTime;
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var cpuTimePassed = cpuTimeAfter - cpuTimeBefore;
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var timePassed = stopwatch.Elapsed;
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var percent = cpuTimePassed / timePassed;
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_logger.Information("CPU usage measured as {Percent:P}", percent);
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return percent;
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}
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}
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} |