Revise SystemInfo (#2047)

* Revise SystemInfo

Cleans up and adds a bit more info (logical core count and available mem at launch) to logs.

- Extract CPU name from CPUID when supported.
- Linux: Robust parsing of procfs files
- Windows: Prefer native calls to WMI
- Remove unnecessary virtual specifiers

* Address gdkchan's comments

* Address AcK's comments

* Address formatting nits

Ryujinx.Common/SystemInfo/LinuxSystemInfo.cs

@@ -1,19 +1,80 @@
+using System;
+using System.Collections.Generic;
+using System.Globalization;
 using System.IO;
-using System.Linq;
 using System.Runtime.Versioning;
+using Ryujinx.Common.Logging;
 
 namespace Ryujinx.Common.SystemInfo
 {
     [SupportedOSPlatform("linux")]
-    internal class LinuxSystemInfo : SystemInfo
+    class LinuxSystemInfo : SystemInfo
     {
-        public override string CpuName { get; }
-        public override ulong RamSize { get; }
-
-        public LinuxSystemInfo()
+        internal LinuxSystemInfo()
         {
-            CpuName = File.ReadAllLines("/proc/cpuinfo").Where(line => line.StartsWith("model name")).ToList()[0].Split(":")[1].Trim();
-            RamSize = ulong.Parse(File.ReadAllLines("/proc/meminfo")[0].Split(":")[1].Trim().Split(" ")[0]) * 1024;
+            string cpuName = GetCpuidCpuName();
+
+            if (cpuName == null)
+            {
+                var cpuDict = new Dictionary<string, string>(StringComparer.Ordinal)
+                {
+                    ["model name"] = null,
+                    ["Processor"] = null,
+                    ["Hardware"] = null
+                };
+
+                ParseKeyValues("/proc/cpuinfo", cpuDict);
+
+                cpuName = cpuDict["model name"] ?? cpuDict["Processor"] ?? cpuDict["Hardware"] ?? "Unknown";
+            }
+
+            var memDict = new Dictionary<string, string>(StringComparer.Ordinal)
+            {
+                ["MemTotal"] = null,
+                ["MemAvailable"] = null
+            };
+
+            ParseKeyValues("/proc/meminfo", memDict);
+
+            // Entries are in KB
+            ulong.TryParse(memDict["MemTotal"]?.Split(' ')[0], NumberStyles.Integer, CultureInfo.InvariantCulture, out ulong totalKB);
+            ulong.TryParse(memDict["MemAvailable"]?.Split(' ')[0], NumberStyles.Integer, CultureInfo.InvariantCulture, out ulong availableKB);
+
+            CpuName = $"{cpuName} ; {LogicalCoreCount} logical";
+            RamTotal = totalKB * 1024;
+            RamAvailable = availableKB * 1024;
+        }
+
+        private static void ParseKeyValues(string filePath, Dictionary<string, string> itemDict)
+        {
+            if (!File.Exists(filePath))
+            {
+                Logger.Error?.Print(LogClass.Application, $"File \"{filePath}\" not found");
+
+                return;
+            }
+
+            int count = itemDict.Count;
+
+            using (StreamReader file = new StreamReader(filePath))
+            {
+                string line;
+                while ((line = file.ReadLine()) != null)
+                {
+                    string[] kvPair = line.Split(':', 2, StringSplitOptions.TrimEntries);
+
+                    if (kvPair.Length < 2) continue;
+
+                    string key = kvPair[0];
+
+                    if (itemDict.TryGetValue(key, out string value) && value == null)
+                    {
+                        itemDict[key] = kvPair[1];
+
+                        if (--count <= 0) break;
+                    }
+                }
+            }
         }
     }
 }