internal static IEnumerable <CpuStatistics> GetAll()
{
var statReader = new Utf8FileReader(StatPath, 4096);
try
{
while (!statReader.EndOfStream)
{
var cpuStr = statReader.ReadWord();
if (!cpuStr.StartsWith(CpuNumberStart.Span))
{
yield break;
}
var cpuNumberStr = cpuStr.Slice(CpuNumberStart.Length);
short?cpuNumber;
if (cpuNumberStr.Length == 0)
{
cpuNumber = null;
}
else
{
Utf8Parser.TryParse(cpuNumberStr, out short num, out _);
cpuNumber = num;
}
var ticksPerSecond = (double)ProcFs.TicksPerSecond;
var userTime = statReader.ReadInt64() / ticksPerSecond;
var niceTime = statReader.ReadInt64() / ticksPerSecond;
var kernelTime = statReader.ReadInt64() / ticksPerSecond;
var idleTime = statReader.ReadInt64() / ticksPerSecond;
statReader.SkipWord();
var irqTime = statReader.ReadInt64() / ticksPerSecond;
var softIrqTime = statReader.ReadInt64() / ticksPerSecond;
statReader.SkipLine();
yield return(new CpuStatistics
{
CpuNumber = cpuNumber,
UserTime = userTime,
NiceTime = niceTime,
KernelTime = kernelTime,
IdleTime = idleTime,
IrqTime = irqTime,
SoftIrqTime = softIrqTime
});
}
}
finally
{
statReader.Dispose();
}
}
public void Refresh()
{
_initialized = false;
_commandLine = null;
_startTimeUtc = null;
var statReader = new Utf8FileReader($"{ProcFs.RootPath}/{Pid}/stat", 512);
try
{
// See http://man7.org/linux/man-pages/man5/proc.5.html /proc/[pid]/stat section
// (1) pid
statReader.SkipWord();
// (2) name
var name = statReader.ReadWord();
_name = name.Slice(1, name.Length - 2).ToUtf8String();
// (3) state
_state = GetProcessState((char)statReader.ReadWord()[0]);
// (4) ppid
_parentPid = statReader.ReadInt32();
// (5) pgrp
_groupId = statReader.ReadInt32();
// (6) session
_sessionId = statReader.ReadInt32();
// (7) tty_nr
statReader.SkipWord();
// (8) tpgid
statReader.SkipWord();
// (9) flags
statReader.SkipWord();
// (10) minflt
_minorFaults = statReader.ReadInt64();
// (11) cminflt
statReader.SkipWord();
// (12) majflt
_majorFaults = statReader.ReadInt64();
// (13) cmajflt
statReader.SkipWord();
// (14) utime
_userProcessorTime = statReader.ReadInt64() / (double)ProcFs.TicksPerSecond;
// (15) stime
_kernelProcessorTime = statReader.ReadInt64() / (double)ProcFs.TicksPerSecond;
// (16) cutime
statReader.SkipWord();
// (17) cstime
statReader.SkipWord();
// (18) priority
_priority = statReader.ReadInt16();
// (19) nice
_nice = statReader.ReadInt16();
// (20) num_threads
_threadCount = statReader.ReadInt32();
// (21) itrealvalue
statReader.SkipWord();
// (22) starttime
_startTimeTicks = statReader.ReadInt64();
// (23) vsize
_virtualMemorySize = statReader.ReadInt64();
// (24) rss
_residentSetSize = statReader.ReadInt64() * Environment.SystemPageSize;
}
finally
{
statReader.Dispose();
}
_initialized = true;
}
