0
0
Fork 0
mirror of https://github.com/matrix-construct/construct synced 2024-12-12 00:22:58 +01:00
construct/include/ircd/prof/psi.h

71 lines
1.5 KiB
C
Raw Normal View History

// Matrix Construct
//
// Copyright (C) Matrix Construct Developers, Authors & Contributors
// Copyright (C) 2016-2019 Jason Volk <jason@zemos.net>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted, provided that the above
// copyright notice and this permission notice is present in all copies. The
// full license for this software is available in the LICENSE file.
#pragma once
#define HAVE_IRCD_PROF_PSI_H
namespace ircd::prof::psi
{
struct file;
struct metric;
struct trigger;
// Read and update the referenced extern.
bool refresh(file &) noexcept;
// Yield ircd::ctx until event; returns unrefreshed
file &wait(const vector_view<const trigger> & = {});
extern const bool supported;
extern const string_view path[3];
extern file cpu, mem, io;
}
struct ircd::prof::psi::trigger
{
const psi::file &file;
string_view string;
};
struct ircd::prof::psi::metric
{
struct avg
{
seconds window;
float pct;
};
struct
{
microseconds total; // stall value direct from system
microseconds relative; // value since last sample only
microseconds window; // duration since last sample
float pct; // % of stall time since last sample
}
stall;
std::array<struct avg, 3> avg;
};
struct ircd::prof::psi::file
{
string_view name;
system_point sampled;
metric some, full;
};
#ifndef __linux__
inline bool
ircd::prof::psi::refresh(metric &)
noexcept
{
return false; // unsupported platform
}
#endif