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construct/include/ircd/perf.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_PERF_H
namespace ircd::perf
{
struct init;
IRCD_EXCEPTION(ircd::error, error)
unsigned long long rdpmc(const uint &);
unsigned long long rdtscp();
unsigned long long rdtsc();
uint64_t cycles();
}
namespace ircd
{
using perf::cycles;
}
struct ircd::perf::init
{
init();
~init() noexcept;
};
inline uint64_t
__attribute__((flatten, always_inline, gnu_inline, artificial))
ircd::perf::cycles()
{
return perf::rdtsc();
}
#if defined(__x86_64__) || defined(__i386__)
inline unsigned long long
__attribute__((always_inline, gnu_inline, artificial))
ircd::perf::rdtsc()
{
return __builtin_ia32_rdtsc();
}
#else
inline unsigned long long
ircd::perf::rdtsc()
{
static_assert(false, "TODO: Implement fallback here");
return 0;
}
#endif
#if defined(__x86_64__) || defined(__i386__)
inline unsigned long long
__attribute__((always_inline, gnu_inline, artificial))
ircd::perf::rdtscp()
{
uint32_t ia32_tsc_aux;
return __builtin_ia32_rdtscp(&ia32_tsc_aux);
}
#else
inline unsigned long long
ircd::perf::rdtscp()
{
static_assert(false, "TODO: Implement fallback here");
return 0;
}
#endif
#if defined(__x86_64__) || defined(__i386__)
inline unsigned long long
__attribute__((always_inline, gnu_inline, artificial))
ircd::perf::rdpmc(const uint &c)
{
return __builtin_ia32_rdpmc(c);
}
#else
inline unsigned long long
ircd::perf::rdpmc(const uint &c)
{
static_assert(false, "TODO: Implement fallback here");
return 0;
}
#endif