mirror of
https://github.com/matrix-construct/construct
synced 2024-12-29 08:54:02 +01:00
892 lines
17 KiB
C++
892 lines
17 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2019 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#include <RB_INC_SYS_SYSCALL_H
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#include <RB_INC_SYS_IOCTL_H
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#include <RB_INC_SYS_MMAN_H
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#include <RB_INC_SYS_RESOURCE_H
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#include <linux/perf_event.h>
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#include <RB_INC_VALGRIND_CALLGRIND_H
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#include <boost/chrono/chrono.hpp>
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#include <boost/chrono/process_cpu_clocks.hpp>
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namespace ircd::prof
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{
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std::ostream &debug(std::ostream &, const ::perf_event_mmap_page &);
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template<class... args> event *
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create(group &,
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const uint32_t &,
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const uint64_t &,
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args&&...);
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static event &leader(group &);
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static event *leader(group *const &);
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extern conf::item<bool> enable;
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}
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struct ircd::prof::event
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:instance_list<event>
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{
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perf_event_attr attr;
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fs::fd fd;
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uint64_t id {0};
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size_t map_size {0};
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char *map {nullptr};
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perf_event_mmap_page *head {nullptr};
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const_buffer body;
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uint64_t rdpmc() const;
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long ioctl(const ulong &req, const long &arg = 0);
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void reset(const long & = 0);
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void enable(const long & = 0);
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void disable(const long & = 0);
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event(const int &group,
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const uint32_t &type,
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const uint64_t &config,
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const bool &user,
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const bool &kernel,
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const bool &use_map = true);
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~event() noexcept;
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};
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decltype(ircd::prof::enable)
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ircd::prof::enable
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{
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{ "name", "ircd.prof.enable" },
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{ "default", false },
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{ "persist", false },
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};
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//
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// init
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//
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ircd::prof::init::init()
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try
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{
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if(!enable)
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return;
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create(system::group, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_CLOCK, true, false);
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create(system::group, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_CLOCK, false, true);
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create(system::group, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_TASK_CLOCK, true, false);
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create(system::group, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_TASK_CLOCK, false, true);
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create(system::group, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MIN, true, false);
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create(system::group, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MIN, false, true);
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create(system::group, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MAJ, true, false);
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create(system::group, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_PAGE_FAULTS_MAJ, false, true);
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create(system::group, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CONTEXT_SWITCHES, true, false);
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create(system::group, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CONTEXT_SWITCHES, false, true);
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create(system::group, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_MIGRATIONS, true, false);
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create(system::group, PERF_TYPE_SOFTWARE, PERF_COUNT_SW_CPU_MIGRATIONS, false, true);
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}
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catch(const std::exception &e)
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{
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log::error
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{
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"Profiling system initialization :%s",
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e.what()
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};
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this->~init();
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throw;
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}
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ircd::prof::init::~init()
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noexcept
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{
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system::group.clear();
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}
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//
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// interface
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//
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void
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ircd::prof::reset(group &group)
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{
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leader(group).reset(PERF_IOC_FLAG_GROUP);
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}
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void
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__attribute__((optimize("s"), flatten))
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ircd::prof::start(group &group)
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{
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leader(group).enable(PERF_IOC_FLAG_GROUP);
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}
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void
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__attribute__((optimize("s"), flatten))
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ircd::prof::stop(group &group)
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{
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auto &leader(*group.front());
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leader.disable(PERF_IOC_FLAG_GROUP);
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assert(!group.empty());
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}
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ircd::prof::event &
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__attribute__((optimize("s")))
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ircd::prof::leader(group &group)
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{
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assert(!group.empty() && group.front());
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return *group.front();
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}
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ircd::prof::event *
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ircd::prof::leader(group *const &group)
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{
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return group && !group->empty()?
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group->front().get():
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nullptr;
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}
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template<class... args>
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ircd::prof::event *
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ircd::prof::create(group &group,
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const uint32_t &type,
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const uint64_t &config,
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args&&... a)
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try
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{
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const int gfd
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{
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leader(&group)? leader(group).fd : -1
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};
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group.emplace_back(std::make_unique<event>
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(
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gfd, type, config, std::forward<args>(a)...
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));
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return group.back().get();
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}
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catch(const std::exception &e)
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{
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log::dwarning
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{
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"Failed to create event type:%u config:%lu :%s",
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type,
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config,
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e.what()
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};
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return nullptr;
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}
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//
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// prof::vg
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//
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namespace ircd::prof::vg
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{
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static bool _enabled;
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}
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//
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// prof::vg::enable
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//
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ircd::prof::vg::enable::enable()
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noexcept
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{
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start();
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}
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ircd::prof::vg::enable::~enable()
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noexcept
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{
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stop();
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}
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//
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// prof::vg::disable
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//
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ircd::prof::vg::disable::disable()
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noexcept
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{
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stop();
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}
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ircd::prof::vg::disable::~disable()
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noexcept
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{
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start();
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}
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//
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// prof::vg util
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//
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void
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ircd::prof::vg::stop()
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noexcept
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{
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#ifdef HAVE_VALGRIND_CALLGRIND_H
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CALLGRIND_STOP_INSTRUMENTATION;
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assert(_enabled);
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_enabled = false;
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#endif
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}
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void
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ircd::prof::vg::start()
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noexcept
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{
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#ifdef HAVE_VALGRIND_CALLGRIND_H
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assert(!_enabled);
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_enabled = true;
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CALLGRIND_START_INSTRUMENTATION;
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#endif
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}
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void
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ircd::prof::vg::reset()
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{
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#ifdef HAVE_VALGRIND_CALLGRIND_H
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CALLGRIND_ZERO_STATS;
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#endif
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}
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void
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ircd::prof::vg::toggle()
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{
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#ifdef HAVE_VALGRIND_CALLGRIND_H
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CALLGRIND_TOGGLE_COLLECT;
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#endif
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}
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void
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ircd::prof::vg::dump(const char *const reason)
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{
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#ifdef HAVE_VALGRIND_CALLGRIND_H
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CALLGRIND_DUMP_STATS_AT(reason);
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#endif
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}
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bool
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ircd::prof::vg::enabled()
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{
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return _enabled;
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}
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//
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// instructions
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//
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ircd::prof::instructions::instructions()
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noexcept
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{
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if(!create(this->group, PERF_TYPE_HARDWARE, PERF_COUNT_HW_INSTRUCTIONS, true, false))
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throw error
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{
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"Cannot sample instruction counter."
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};
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reset(this->group);
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start(this->group);
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}
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ircd::prof::instructions::~instructions()
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noexcept
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{
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}
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const uint64_t &
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__attribute__((optimize("s"), flatten))
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ircd::prof::instructions::sample()
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{
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retired = prof::leader(group).rdpmc();
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return retired;
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}
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const uint64_t &
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ircd::prof::instructions::at()
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const
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{
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return retired;
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}
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//
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// syscall_timer
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//
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ircd::prof::syscall_timer::syscall_timer()
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noexcept
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:started
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{
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time_kern()
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}
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,stopped
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{
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0UL
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}
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{
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}
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uint64_t
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ircd::prof::syscall_timer::sample()
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{
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stopped = time_kern();
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return at();
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}
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uint64_t
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ircd::prof::syscall_timer::at()
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const
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{
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return stopped - started;
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}
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//
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// syscall_timer::high_resolution
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//
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ircd::prof::syscall_timer::high_resolution::high_resolution()
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noexcept
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:started
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{
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resource(prof::sample).at(resource::TIME_KERN)
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}
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,stopped
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{
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0UL
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}
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{
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}
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uint64_t
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ircd::prof::syscall_timer::high_resolution::sample()
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{
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stopped = resource(prof::sample).at(resource::TIME_KERN);
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return at();
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}
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uint64_t
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ircd::prof::syscall_timer::high_resolution::at()
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const
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{
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return stopped - started;
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}
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//
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// time_*() suite
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//
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uint64_t
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ircd::prof::time_thrd()
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{
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struct ::timespec tv;
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syscall(::clock_gettime, CLOCK_THREAD_CPUTIME_ID, &tv);
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return ulong(tv.tv_sec) * 1000000000UL + tv.tv_nsec;
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}
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uint64_t
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ircd::prof::time_proc()
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{
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struct ::timespec tv;
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syscall(::clock_gettime, CLOCK_PROCESS_CPUTIME_ID, &tv);
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return ulong(tv.tv_sec) * 1000000000UL + tv.tv_nsec;
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}
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//
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// Interface (cross-platform)
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//
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uint64_t
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ircd::prof::time_real()
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{
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return boost::chrono::process_real_cpu_clock::now().time_since_epoch().count();
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}
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uint64_t
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ircd::prof::time_kern()
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{
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return boost::chrono::process_system_cpu_clock::now().time_since_epoch().count();
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}
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uint64_t
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ircd::prof::time_user()
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{
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return boost::chrono::process_user_cpu_clock::now().time_since_epoch().count();
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}
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//
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// times
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//
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ircd::prof::times::times(sample_t)
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:real{}
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,kern{}
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,user{}
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{
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const auto tp
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{
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boost::chrono::process_cpu_clock::now()
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};
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const auto d
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{
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tp.time_since_epoch()
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};
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this->real = d.count().real;
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this->kern = d.count().system;
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this->user = d.count().user;
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}
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//
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// resource
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//
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ircd::prof::resource
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ircd::prof::operator-(const resource &a,
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const resource &b)
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{
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resource ret;
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std::transform(begin(a), end(a), begin(b), begin(ret), std::minus<resource::value_type>{});
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return ret;
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}
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ircd::prof::resource
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ircd::prof::operator+(const resource &a,
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const resource &b)
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{
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resource ret;
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std::transform(begin(a), end(a), begin(b), begin(ret), std::plus<resource::value_type>{});
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return ret;
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}
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ircd::prof::resource &
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ircd::prof::operator-=(resource &a,
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const resource &b)
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{
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for(size_t i(0); i < a.size(); ++i)
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a[i] -= b[i];
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return a;
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}
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ircd::prof::resource &
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ircd::prof::operator+=(resource &a,
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const resource &b)
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{
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for(size_t i(0); i < a.size(); ++i)
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a[i] += b[i];
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return a;
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}
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//
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// resource::resource
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//
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ircd::prof::resource::resource(sample_t)
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{
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struct ::rusage ru;
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syscall(::getrusage, RUSAGE_SELF, &ru);
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at(TIME_USER) = ru.ru_utime.tv_sec * 1000000UL + ru.ru_utime.tv_usec;
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at(TIME_KERN) = ru.ru_stime.tv_sec * 1000000UL + ru.ru_stime.tv_usec;
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at(RSS_MAX) = ru.ru_maxrss;
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at(PF_MINOR) = ru.ru_minflt;
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at(PF_MAJOR) = ru.ru_majflt;
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at(BLOCK_IN) = ru.ru_inblock;
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at(BLOCK_OUT) = ru.ru_oublock;
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at(SCHED_YIELD) = ru.ru_nvcsw;
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at(SCHED_PREEMPT) = ru.ru_nivcsw;
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}
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//
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// system
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//
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decltype(ircd::prof::system::group)
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ircd::prof::system::group;
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ircd::prof::system
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ircd::prof::operator-(const system &a,
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const system &b)
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{
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system ret(a);
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ret -= b;
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return ret;
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}
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ircd::prof::system
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ircd::prof::operator+(const system &a,
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const system &b)
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{
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system ret(a);
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ret += b;
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return ret;
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}
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ircd::prof::system &
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ircd::prof::operator-=(system &a,
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const system &b)
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{
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for(size_t i(0); i < a.size(); ++i)
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for(size_t j(0); j < a[i].size(); ++j)
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a[i][j] -= b[i][j];
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return a;
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}
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ircd::prof::system &
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ircd::prof::operator+=(system &a,
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const system &b)
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{
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for(size_t i(0); i < a.size(); ++i)
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for(size_t j(0); j < a[i].size(); ++j)
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a[i][j] += b[i][j];
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return a;
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}
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ircd::prof::system &
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ircd::prof::hotsample(system &s)
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noexcept
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{
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thread_local char buf[1024];
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auto &leader
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{
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prof::leader(system::group)
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};
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const const_buffer read
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{
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buf, size_t(syscall(::read, int(leader.fd), buf, sizeof(buf)))
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};
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for_each(read, [&s]
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(const type &type, const uint64_t &val)
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{
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auto &r0
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{
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s.at(size_t(type.counter))
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};
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auto &r1
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{
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r0.at(size_t(type.dpl))
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};
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r1 = val;
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});
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return s;
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}
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void
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ircd::prof::for_each(const const_buffer &buf,
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const read_closure &closure)
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{
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struct head
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{
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uint64_t nr, te, tr;
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}
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const *const &head
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{
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reinterpret_cast<const struct head *>(data(buf))
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};
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struct body
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{
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uint64_t val, id;
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}
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const *const &body
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{
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reinterpret_cast<const struct body *>(data(buf) + sizeof(struct head))
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};
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// Start with the pseudo-results; these should always be the same for
|
|
// non-hw profiling, so the DPL is meaningless.
|
|
closure(type{dpl::KERNEL, uint8_t(-1)}, head->te);
|
|
closure(type{dpl::USER, uint8_t(-1)}, head->tr);
|
|
|
|
// Iterate the result list
|
|
for(size_t i(0); i < head->nr; ++i)
|
|
for(auto it(begin(event::list)); it != end(event::list); ++it)
|
|
if((*it)->id == body[i].id)
|
|
return closure(type(**it), body[i].val);
|
|
}
|
|
|
|
ircd::prof::system::system(sample_t)
|
|
noexcept
|
|
{
|
|
stop(group);
|
|
hotsample(*this);
|
|
start(group);
|
|
}
|
|
|
|
//
|
|
// event
|
|
//
|
|
|
|
template<>
|
|
decltype(ircd::util::instance_list<ircd::prof::event>::allocator)
|
|
ircd::util::instance_list<ircd::prof::event>::allocator
|
|
{};
|
|
|
|
template<>
|
|
decltype(ircd::util::instance_list<ircd::prof::event>::list)
|
|
ircd::util::instance_list<ircd::prof::event>::list
|
|
{
|
|
allocator
|
|
};
|
|
|
|
//
|
|
// event::event
|
|
//
|
|
|
|
ircd::prof::event::event(const int &group,
|
|
const uint32_t &type,
|
|
const uint64_t &config,
|
|
const bool &user,
|
|
const bool &kernel,
|
|
const bool &use_map)
|
|
:attr{[&]
|
|
{
|
|
struct ::perf_event_attr ret {0};
|
|
ret.size = sizeof(ret);
|
|
|
|
ret.type = type;
|
|
ret.config = config;
|
|
ret.exclude_user = !user;
|
|
ret.exclude_kernel = !kernel;
|
|
|
|
ret.read_format |= PERF_FORMAT_GROUP;
|
|
ret.read_format |= PERF_FORMAT_ID;
|
|
ret.read_format |= PERF_FORMAT_TOTAL_TIME_ENABLED;
|
|
ret.read_format |= PERF_FORMAT_TOTAL_TIME_RUNNING;
|
|
|
|
ret.exclude_idle = true;
|
|
ret.exclude_host = false;
|
|
ret.exclude_hv = true;
|
|
ret.exclude_guest = true;
|
|
ret.exclude_callchain_user = true;
|
|
ret.exclude_callchain_kernel = true;
|
|
|
|
ret.disabled = true;
|
|
return ret;
|
|
}()}
|
|
,fd{[this, &group]
|
|
{
|
|
ulong flags(0);
|
|
flags |= PERF_FLAG_FD_CLOEXEC;
|
|
|
|
const int cpu(-1);
|
|
const pid_t pid(0);
|
|
return int(syscall<SYS_perf_event_open>(&attr, pid, cpu, group, flags));
|
|
}()}
|
|
,id{[this]
|
|
{
|
|
uint64_t ret;
|
|
syscall(::ioctl, int(fd), PERF_EVENT_IOC_ID, &ret);
|
|
return ret;
|
|
}()}
|
|
,map_size
|
|
{
|
|
use_map && type == PERF_TYPE_HARDWARE?
|
|
size_t(1UL + 0UL) * info::page_size:
|
|
0UL
|
|
}
|
|
,map{[this]
|
|
{
|
|
int prot(0);
|
|
prot |= PROT_READ;
|
|
prot |= PROT_WRITE;
|
|
|
|
int flags(0);
|
|
flags |= MAP_SHARED;
|
|
|
|
void *const ret
|
|
{
|
|
map_size?
|
|
::mmap(nullptr, map_size, prot, flags, int(this->fd), 0):
|
|
nullptr
|
|
};
|
|
|
|
if(ret == (void *)-1)
|
|
throw std::system_error
|
|
{
|
|
errno, std::system_category()
|
|
};
|
|
|
|
if(map_size && ret == nullptr)
|
|
throw error
|
|
{
|
|
"mmap(2) failed on event (fd:%d)", int(fd)
|
|
};
|
|
|
|
return reinterpret_cast<char *>(ret);
|
|
}()}
|
|
,head
|
|
{
|
|
map?
|
|
reinterpret_cast<::perf_event_mmap_page *>(map):
|
|
nullptr
|
|
}
|
|
,body
|
|
{
|
|
head?
|
|
map + head->data_offset:
|
|
nullptr,
|
|
head?
|
|
head->data_size:
|
|
0UL
|
|
}
|
|
{
|
|
assert(size(body) % info::page_size == 0);
|
|
assert(map_size % info::page_size == 0);
|
|
}
|
|
|
|
ircd::prof::event::~event()
|
|
noexcept
|
|
{
|
|
assert(!map || map_size);
|
|
assert(!map_size || map);
|
|
|
|
if(map)
|
|
syscall(::munmap, map, map_size);
|
|
}
|
|
|
|
inline void
|
|
__attribute__((optimize("s")))
|
|
ircd::prof::event::disable(const long &arg)
|
|
{
|
|
::ioctl(int(fd), PERF_EVENT_IOC_DISABLE, arg);
|
|
}
|
|
|
|
inline void
|
|
__attribute__((optimize("s")))
|
|
ircd::prof::event::enable(const long &arg)
|
|
{
|
|
const int &fd(this->fd);
|
|
__builtin_ia32_mfence();
|
|
__builtin_ia32_lfence();
|
|
::ioctl(fd, PERF_EVENT_IOC_ENABLE, arg);
|
|
}
|
|
|
|
void
|
|
ircd::prof::event::reset(const long &arg)
|
|
{
|
|
ioctl(PERF_EVENT_IOC_RESET, arg);
|
|
}
|
|
|
|
long
|
|
ircd::prof::event::ioctl(const ulong &req,
|
|
const long &arg)
|
|
{
|
|
return syscall(::ioctl, int(fd), req, arg);
|
|
}
|
|
|
|
inline uint64_t
|
|
__attribute__((optimize("s")))
|
|
ircd::prof::event::rdpmc()
|
|
const
|
|
{
|
|
assert(head->cap_user_time);
|
|
assert(head->cap_user_rdpmc);
|
|
|
|
uint64_t ret;
|
|
uint32_t seq; do
|
|
{
|
|
seq = head->lock;
|
|
__sync_synchronize();
|
|
//assert(head->time_enabled == head->time_running);
|
|
ret = head->offset;
|
|
ret += head->index? x86::rdpmc(head->index - 1) : 0UL;
|
|
__sync_synchronize();
|
|
}
|
|
while(head->lock != seq);
|
|
return ret;
|
|
}
|
|
|
|
//
|
|
// type
|
|
//
|
|
|
|
ircd::prof::type::type(const enum dpl &dpl,
|
|
const uint8_t &type_id,
|
|
const uint8_t &counter,
|
|
const uint8_t &cacheop,
|
|
const uint8_t &cacheres)
|
|
:dpl{dpl}
|
|
,type_id{type_id}
|
|
,counter{counter}
|
|
,cacheop{cacheop}
|
|
,cacheres{cacheres}
|
|
{
|
|
}
|
|
|
|
ircd::prof::type::type(const event &event)
|
|
:dpl
|
|
{
|
|
event.attr.exclude_kernel? dpl::USER : dpl::KERNEL
|
|
}
|
|
,type_id
|
|
{
|
|
uint8_t(event.attr.type)
|
|
}
|
|
,counter
|
|
{
|
|
uint8_t(event.attr.config)
|
|
}
|
|
,cacheop
|
|
{
|
|
uint8_t(event.attr.config >> 8)
|
|
}
|
|
,cacheres
|
|
{
|
|
uint8_t(event.attr.config >> 16)
|
|
}
|
|
{
|
|
}
|
|
|
|
//
|
|
// internal
|
|
//
|
|
|
|
std::ostream &
|
|
ircd::prof::debug(std::ostream &s,
|
|
const ::perf_event_mmap_page &head)
|
|
{
|
|
s << "version: " << head.version << std::endl;
|
|
s << "compat: " << head.compat_version << std::endl;
|
|
s << "lock: " << head.lock << std::endl;
|
|
s << "index: " << head.index << std::endl;
|
|
s << "offset: " << head.offset << std::endl;
|
|
s << "time_enabled: " << head.time_enabled << std::endl;
|
|
s << "time_running: " << head.time_running << std::endl;
|
|
s << "cap_user_rdpmc: " << head.cap_user_rdpmc << std::endl;
|
|
s << "cap_user_time: " << head.cap_user_time << std::endl;
|
|
s << "cap_user_time_zero: " << head.cap_user_time_zero << std::endl;
|
|
s << "pmc_width: " << head.pmc_width << std::endl;
|
|
s << "time_shift: " << head.time_shift << std::endl;
|
|
s << "time_mult: " << head.time_mult << std::endl;
|
|
s << "time_offset: " << head.time_offset << std::endl;
|
|
s << "data_head: " << head.data_head << std::endl;
|
|
s << "data_tail: " << head.data_tail << std::endl;
|
|
s << "data_offset: " << head.data_offset << std::endl;
|
|
s << "data_size: " << head.data_size << std::endl;
|
|
s << "aux_head: " << head.aux_head << std::endl;
|
|
s << "aux_tail: " << head.aux_tail << std::endl;
|
|
s << "aux_offset: " << head.aux_offset << std::endl;
|
|
s << "aux_size: " << head.aux_size << std::endl;
|
|
|
|
return s;
|
|
}
|