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Kernel: Move Performance-measurement code to the Tasks subdirectory
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commit
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23 changed files with 24 additions and 24 deletions
155
Kernel/Tasks/PerformanceEventBuffer.h
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155
Kernel/Tasks/PerformanceEventBuffer.h
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/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#pragma once
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#include <AK/Error.h>
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#include <Kernel/Library/KBuffer.h>
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namespace Kernel {
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class KBufferBuilder;
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struct RegisterState;
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struct [[gnu::packed]] MallocPerformanceEvent {
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size_t size;
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FlatPtr ptr;
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};
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struct [[gnu::packed]] FreePerformanceEvent {
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size_t size;
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FlatPtr ptr;
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};
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struct [[gnu::packed]] MmapPerformanceEvent {
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size_t size;
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FlatPtr ptr;
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char name[64];
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};
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struct [[gnu::packed]] MunmapPerformanceEvent {
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size_t size;
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FlatPtr ptr;
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};
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struct [[gnu::packed]] ProcessCreatePerformanceEvent {
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pid_t parent_pid;
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char executable[64];
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};
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struct [[gnu::packed]] ProcessExecPerformanceEvent {
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char executable[64];
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};
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struct [[gnu::packed]] ThreadCreatePerformanceEvent {
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pid_t parent_tid;
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};
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struct [[gnu::packed]] ContextSwitchPerformanceEvent {
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pid_t next_pid;
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u32 next_tid;
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};
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struct [[gnu::packed]] KMallocPerformanceEvent {
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size_t size;
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FlatPtr ptr;
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};
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struct [[gnu::packed]] KFreePerformanceEvent {
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size_t size;
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FlatPtr ptr;
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};
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struct [[gnu::packed]] SignpostPerformanceEvent {
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FlatPtr arg1;
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FlatPtr arg2;
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};
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struct [[gnu::packed]] ReadPerformanceEvent {
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int fd;
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size_t size;
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size_t filename_index;
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size_t start_timestamp;
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bool success;
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};
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struct [[gnu::packed]] PerformanceEvent {
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u32 type { 0 };
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u8 stack_size { 0 };
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u32 pid { 0 };
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u32 tid { 0 };
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u64 timestamp;
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u32 lost_samples;
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union {
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MallocPerformanceEvent malloc;
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FreePerformanceEvent free;
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MmapPerformanceEvent mmap;
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MunmapPerformanceEvent munmap;
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ProcessCreatePerformanceEvent process_create;
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ProcessExecPerformanceEvent process_exec;
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ThreadCreatePerformanceEvent thread_create;
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ContextSwitchPerformanceEvent context_switch;
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KMallocPerformanceEvent kmalloc;
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KFreePerformanceEvent kfree;
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SignpostPerformanceEvent signpost;
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ReadPerformanceEvent read;
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} data;
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static constexpr size_t max_stack_frame_count = 64;
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FlatPtr stack[max_stack_frame_count];
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};
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enum class ProcessEventType {
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Create,
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Exec
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};
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class PerformanceEventBuffer {
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public:
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static OwnPtr<PerformanceEventBuffer> try_create_with_size(size_t buffer_size);
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ErrorOr<void> append(int type, FlatPtr arg1, FlatPtr arg2, StringView arg3, Thread* current_thread = Thread::current(), FlatPtr arg4 = 0, u64 arg5 = 0, ErrorOr<FlatPtr> const& arg6 = 0);
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ErrorOr<void> append_with_ip_and_bp(ProcessID pid, ThreadID tid, FlatPtr eip, FlatPtr ebp,
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int type, u32 lost_samples, FlatPtr arg1, FlatPtr arg2, StringView arg3, FlatPtr arg4 = 0, u64 arg5 = {}, ErrorOr<FlatPtr> const& arg6 = 0);
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ErrorOr<void> append_with_ip_and_bp(ProcessID pid, ThreadID tid, RegisterState const& regs,
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int type, u32 lost_samples, FlatPtr arg1, FlatPtr arg2, StringView arg3, FlatPtr arg4 = 0, u64 arg5 = {}, ErrorOr<FlatPtr> const& arg6 = 0);
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void clear()
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{
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m_count = 0;
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}
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size_t capacity() const { return m_buffer->size() / sizeof(PerformanceEvent); }
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size_t count() const { return m_count; }
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PerformanceEvent const& at(size_t index) const
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{
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return const_cast<PerformanceEventBuffer&>(*this).at(index);
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}
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ErrorOr<void> to_json(KBufferBuilder&) const;
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ErrorOr<void> add_process(Process const&, ProcessEventType event_type);
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ErrorOr<FlatPtr> register_string(NonnullOwnPtr<KString>);
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private:
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explicit PerformanceEventBuffer(NonnullOwnPtr<KBuffer>);
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template<typename Serializer>
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ErrorOr<void> to_json_impl(Serializer&) const;
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PerformanceEvent& at(size_t index);
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size_t m_count { 0 };
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NonnullOwnPtr<KBuffer> m_buffer;
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HashMap<NonnullOwnPtr<KString>, size_t> m_strings;
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};
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extern bool g_profiling_all_threads;
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extern PerformanceEventBuffer* g_global_perf_events;
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extern u64 g_profiling_event_mask;
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}
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