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ircd::perf: Start a perf profiling subsystem; move ctx::prof counter utils.

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This commit is contained in:
Jason Volk 2019-03-31 18:04:11 -07:00
parent 9b54f4e4a2
commit 403bf52867
9 changed files with 144 additions and 72 deletions
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2
include/ircd/ctx/ctx.h
View file

@ -118,6 +118,4 @@ namespace ircd
using ctx::critical_assertion;
using ctx::critical_indicator;
using ctx::prof::cycles;
}

62
include/ircd/ctx/prof.h
View file

@ -32,12 +32,6 @@ namespace ircd::ctx::prof
enum class event :uint8_t;
struct ticker;
// util
unsigned long long rdpmc(const uint &);
unsigned long long rdtscp();
unsigned long long rdtsc();
uint64_t cycles();
string_view reflect(const event &);
// totals
@ -101,59 +95,3 @@ struct ircd::ctx::prof::ticker
// monotonic counters for events
std::array<uint64_t, num_of<prof::event>()> event {{0}};
};
inline uint64_t
__attribute__((flatten, always_inline, gnu_inline, artificial))
ircd::ctx::prof::cycles()
{
return rdtsc();
}
#if defined(__x86_64__) || defined(__i386__)
inline unsigned long long
__attribute__((always_inline, gnu_inline, artificial))
ircd::ctx::prof::rdtsc()
{
return __builtin_ia32_rdtsc();
}
#else
inline unsigned long long
ircd::ctx::prof::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::ctx::prof::rdtscp()
{
uint32_t ia32_tsc_aux;
return __builtin_ia32_rdtscp(&ia32_tsc_aux);
}
#else
inline unsigned long long
ircd::ctx::prof::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::ctx::prof::rdpmc(const uint &c)
{
return __builtin_ia32_rdpmc(c);
}
#else
inline unsigned long long
ircd::ctx::prof::rdpmc(const uint &c)
{
static_assert(false, "TODO: Implement fallback here");
return 0;
}
#endif

1
include/ircd/ircd.h
View file

@ -47,6 +47,7 @@
#include "magics.h"
#include "conf.h"
#include "stats.h"
#include "perf.h"
#include "fs/fs.h"
#include "ios.h"
#include "ctx/ctx.h"

92
include/ircd/perf.h Normal file
View file

@ -0,0 +1,92 @@
// 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

1
ircd/Makefile.am
View file

@ -116,6 +116,7 @@ libircd_la_SOURCES = \
logger.cc \
magic.cc \
stats.cc \
perf.cc \
fs.cc \
sodium.cc \
openssl.cc \

10
ircd/ctx.cc
View file

@ -872,7 +872,7 @@ ircd::ctx::this_ctx::slice_usage_warning::slice_usage_warning(const string_view
// Set the start value to the total number of cycles accrued by this
// context including the current time slice.
!current?
prof::cycles():
perf::cycles():
~cur().flags & context::SLICE_EXEMPT?
cur().profile.cycles + prof::cur_slice_cycles():
0
@ -898,7 +898,7 @@ noexcept
{
current?
cur().profile.cycles + prof::cur_slice_cycles():
prof::cycles()
perf::cycles()
};
assert(stop >= start);
@ -1663,13 +1663,13 @@ ircd::ctx::prof::handle_cur_continue()
void
ircd::ctx::prof::slice_enter()
{
_slice_start = cycles();
_slice_start = perf::cycles();
}
void
ircd::ctx::prof::slice_leave()
{
_slice_stop = cycles();
_slice_stop = perf::cycles();
auto &c(cur());
assert(_slice_stop >= _slice_start);
@ -1811,7 +1811,7 @@ ircd::ctx::prof::slice_exceeded_warning(const ulong &cycles)
ulong
ircd::ctx::prof::cur_slice_cycles()
{
return cycles() - cur_slice_start();
return perf::cycles() - cur_slice_start();
}
const ulong &

6
ircd/ios.cc
View file

@ -208,7 +208,7 @@ ircd::ios::handler::fault(handler *const &handler)
// needs to be tied off here instead.
if(!ret)
{
stats.slice_last = cycles() - handler->slice_start;
stats.slice_last = perf::cycles() - handler->slice_start;
stats.slice_total += stats.slice_last;
assert(handler::current == handler);
@ -226,7 +226,7 @@ ircd::ios::handler::leave(handler *const &handler)
assert(descriptor.stats);
auto &stats(*descriptor.stats);
stats.slice_last = cycles() - handler->slice_start;
stats.slice_last = perf::cycles() - handler->slice_start;
stats.slice_total += stats.slice_last;
assert(handler::current == handler);
@ -245,7 +245,7 @@ ircd::ios::handler::enter(handler *const &handler)
assert(!handler::current);
handler::current = handler;
handler->slice_start = cycles();
handler->slice_start = perf::cycles();
}
bool

1
ircd/ircd.cc
View file

@ -202,6 +202,7 @@ noexcept try
// more appropriate.
fs::init _fs_; // Local filesystem
perf::init _perf_; // Profiling related
magic::init _magic_; // libmagic
ctx::ole::init _ole_; // Thread OffLoad Engine
nacl::init _nacl_; // nacl crypto

41
ircd/perf.cc Normal file
View file

@ -0,0 +1,41 @@
// 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.
#ifdef HAVE_LINUX_PERF_EVENT_H
#include <linux/perf_event.h>
#endif
//
// init
//
#ifdef HAVE_LINUX_PERF_EVENT_H
ircd::perf::init::init()
{
}
#else
ircd::perf::init::init()
{
}
#endif
#ifdef HAVE_LINUX_PERF_EVENT_H
ircd::perf::init::~init()
noexcept
{
}
#else
ircd::perf::init::~init()
noexcept
{
}
#endif