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construct/include/ircd/prof/system.h

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// 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_SYSTEM_H
namespace ircd::prof
{
struct system;
using read_closure = std::function<void (const type &, const uint64_t &val)>;
void for_each(const const_buffer &read, const read_closure &);
system &hotsample(system &) noexcept;
system &operator+=(system &a, const system &b);
system &operator-=(system &a, const system &b);
system operator+(const system &a, const system &b);
system operator-(const system &a, const system &b);
}
/// Frontend to perf_event_open(2). This has the highest resolution.
struct ircd::prof::system
:std::array<std::array<uint64_t, 2>, 7>
{
using array_type = std::array<std::array<uint64_t, 2>, 7>;
static prof::group group;
// [N][0] = KERNEL, [N][1] = USER
//
// 0: TIME_PROF,
// 1: TIME_CPU,
// 2: TIME_TASK,
// 3: PF_MINOR,
// 4: PF_MAJOR,
// 5: SWITCH_TASK,
// 6: SWITCH_CPU,
system(sample_t) noexcept;
system() :array_type{{{0}}} {}
~system() noexcept;
};