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https://github.com/LadybirdBrowser/ladybird.git
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6cb640eeba
Use the TimerQueue to expire blocking operations, which is one less thing the Scheduler needs to check on every iteration. Also, add a BlockTimeout class that will automatically handle relative or absolute timeouts as well as overriding timeouts (e.g. socket timeouts) more consistently. Also, rework the TimerQueue class to be able to fire events from any processor, which requires Timer to be RefCounted. Also allow creating id-less timers for use by blocking operations.
132 lines
4.5 KiB
C++
132 lines
4.5 KiB
C++
/*
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* Copyright (c) 2020, Andreas Kling <kling@serenityos.org>
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/JsonArraySerializer.h>
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#include <AK/JsonObject.h>
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#include <AK/JsonObjectSerializer.h>
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#include <Kernel/KBufferBuilder.h>
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#include <Kernel/PerformanceEventBuffer.h>
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namespace Kernel {
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PerformanceEventBuffer::PerformanceEventBuffer()
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: m_buffer(KBuffer::create_with_size(4 * MiB))
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{
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}
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KResult PerformanceEventBuffer::append(int type, FlatPtr arg1, FlatPtr arg2)
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{
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if (count() >= capacity())
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return KResult(-ENOBUFS);
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PerformanceEvent event;
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event.type = type;
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switch (type) {
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case PERF_EVENT_MALLOC:
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event.data.malloc.size = arg1;
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event.data.malloc.ptr = arg2;
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#ifdef VERY_DEBUG
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dbg() << "PERF_EVENT_MALLOC: " << (void*)event.data.malloc.ptr << " (" << event.data.malloc.size << ")";
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#endif
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break;
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case PERF_EVENT_FREE:
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event.data.free.ptr = arg1;
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#ifdef VERY_DEBUG
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dbg() << "PERF_EVENT_FREE: " << (void*)event.data.free.ptr;
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#endif
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break;
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default:
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return KResult(-EINVAL);
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}
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FlatPtr ebp;
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asm volatile("movl %%ebp, %%eax"
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: "=a"(ebp));
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auto current_thread = Thread::current();
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auto eip = current_thread->get_register_dump_from_stack().eip;
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Vector<FlatPtr> backtrace;
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{
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SmapDisabler disabler;
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backtrace = current_thread->raw_backtrace(ebp, eip);
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}
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event.stack_size = min(sizeof(event.stack) / sizeof(FlatPtr), static_cast<size_t>(backtrace.size()));
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memcpy(event.stack, backtrace.data(), event.stack_size * sizeof(FlatPtr));
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#ifdef VERY_DEBUG
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for (size_t i = 0; i < event.stack_size; ++i)
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dbg() << " " << (void*)event.stack[i];
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#endif
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event.timestamp = TimeManagement::the().uptime_ms();
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at(m_count++) = event;
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return KSuccess;
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}
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PerformanceEvent& PerformanceEventBuffer::at(size_t index)
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{
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ASSERT(index < capacity());
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auto* events = reinterpret_cast<PerformanceEvent*>(m_buffer.data());
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return events[index];
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}
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KBuffer PerformanceEventBuffer::to_json(ProcessID pid, const String& executable_path) const
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{
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KBufferBuilder builder;
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JsonObjectSerializer object(builder);
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object.add("pid", pid.value());
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object.add("executable", executable_path);
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auto array = object.add_array("events");
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for (size_t i = 0; i < m_count; ++i) {
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auto& event = at(i);
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auto event_object = array.add_object();
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switch (event.type) {
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case PERF_EVENT_MALLOC:
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event_object.add("type", "malloc");
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event_object.add("ptr", static_cast<u64>(event.data.malloc.ptr));
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event_object.add("size", static_cast<u64>(event.data.malloc.size));
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break;
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case PERF_EVENT_FREE:
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event_object.add("type", "free");
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event_object.add("ptr", static_cast<u64>(event.data.free.ptr));
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break;
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}
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event_object.add("timestamp", event.timestamp);
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auto stack_array = event_object.add_array("stack");
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for (size_t j = 0; j < event.stack_size; ++j) {
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stack_array.add(event.stack[j]);
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}
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stack_array.finish();
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event_object.finish();
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}
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array.finish();
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object.finish();
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return builder.build();
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}
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}
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