1
    2
    3
    4
    5
    6
    7
    8
    9
   10
   11
   12
   13
   14
   15
   16
   17
   18
   19
   20
   21
   22
   23
   24
   25
   26
   27
   28
   29
   30
   31
   32
   33
   34
   35
   36
   37
   38
   39
   40
   41
   42
   43
   44
   45
   46
   47
   48
   49
   50
   51
   52
   53
   54
   55
   56
   57
   58
   59
   60
   61
   62
   63
   64
   65
   66
   67
   68
   69
   70
   71
   72
   73
   74
   75
   76
   77
   78
   79
   80
   81
   82
   83
   84
   85
   86
   87
   88
   89
   90
   91
   92
   93
   94
   95
   96
   97
   98
   99
  100
  101
  102
  103
  104
  105
  106
  107
  108
  109
  110
  111
  112
  113
  114
  115
  116
  117
  118
  119
  120
  121
  122
  123
  124
  125
  126
  127
  128
  129
  130
  131
  132
  133
  134
  135
  136
  137
  138
  139
  140
  141
  142


gpu / command_buffer / service / transfer_buffer_manager.cc [blame]

// Copyright 2012 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#include "gpu/command_buffer/service/transfer_buffer_manager.h"

#include <stdint.h>

#include <limits>
#include <memory>

#include "base/containers/contains.h"
#include "base/logging.h"
#include "base/process/process_handle.h"
#include "base/strings/stringprintf.h"
#include "base/task/single_thread_task_runner.h"
#include "base/trace_event/memory_allocator_dump.h"
#include "base/trace_event/memory_dump_manager.h"
#include "base/trace_event/process_memory_dump.h"
#include "base/trace_event/trace_event.h"
#include "gpu/command_buffer/common/cmd_buffer_common.h"
#include "gpu/command_buffer/service/memory_tracking.h"

namespace gpu {

TransferBufferManager::TransferBufferManager(MemoryTracker* memory_tracker)
    : shared_memory_bytes_allocated_(0), memory_tracker_(memory_tracker) {
  // When created from InProcessCommandBuffer, we won't have a |memory_tracker_|
  // so don't register a dump provider.
  if (memory_tracker_) {
    base::trace_event::MemoryDumpManager::GetInstance()->RegisterDumpProvider(
        this, "gpu::TransferBufferManager",
        base::SingleThreadTaskRunner::GetCurrentDefault());
  }
}

TransferBufferManager::~TransferBufferManager() {
  while (!registered_buffers_.empty()) {
    BufferMap::iterator it = registered_buffers_.begin();
    DCHECK(shared_memory_bytes_allocated_ >= it->second->size());
    shared_memory_bytes_allocated_ -= it->second->size();
    registered_buffers_.erase(it);
  }
  DCHECK(!shared_memory_bytes_allocated_);

  base::trace_event::MemoryDumpManager::GetInstance()->UnregisterDumpProvider(
      this);
}

bool TransferBufferManager::RegisterTransferBuffer(
    int32_t id,
    scoped_refptr<Buffer> buffer) {
  if (id <= 0) {
    DVLOG(0) << "Cannot register transfer buffer with non-positive ID.";
    return false;
  }

  // Fail if the ID is in use.
  if (base::Contains(registered_buffers_, id)) {
    DVLOG(0) << "Buffer ID already in use.";
    return false;
  }

  // Check buffer alignment is sane.
  DCHECK(!(reinterpret_cast<uintptr_t>(buffer->memory()) &
           (kCommandBufferEntrySize - 1)));

  shared_memory_bytes_allocated_ += buffer->size();

  registered_buffers_[id] = std::move(buffer);

  return true;
}

void TransferBufferManager::DestroyTransferBuffer(int32_t id) {
  BufferMap::iterator it = registered_buffers_.find(id);
  if (it == registered_buffers_.end()) {
    DVLOG(0) << "Transfer buffer ID was not registered.";
    return;
  }

  DCHECK(shared_memory_bytes_allocated_ >= it->second->size());
  shared_memory_bytes_allocated_ -= it->second->size();

  registered_buffers_.erase(it);
}

scoped_refptr<Buffer> TransferBufferManager::GetTransferBuffer(int32_t id) {
  if (id == 0)
    return nullptr;

  BufferMap::iterator it = registered_buffers_.find(id);
  if (it == registered_buffers_.end())
    return nullptr;

  return it->second;
}

bool TransferBufferManager::OnMemoryDump(
    const base::trace_event::MemoryDumpArgs& args,
    base::trace_event::ProcessMemoryDump* pmd) {
  using base::trace_event::MemoryAllocatorDump;
  using base::trace_event::MemoryDumpLevelOfDetail;

  if (args.level_of_detail == MemoryDumpLevelOfDetail::kBackground) {
    std::string dump_name = base::StringPrintf("gpu/transfer_memory/client_%d",
                                               memory_tracker_->ClientId());
    MemoryAllocatorDump* dump = pmd->CreateAllocatorDump(dump_name);
    dump->AddScalar(MemoryAllocatorDump::kNameSize,
                    MemoryAllocatorDump::kUnitsBytes,
                    shared_memory_bytes_allocated_);

    // Early out, no need for more detail in a BACKGROUND dump.
    return true;
  }

  for (const auto& buffer_entry : registered_buffers_) {
    int32_t buffer_id = buffer_entry.first;
    const Buffer* buffer = buffer_entry.second.get();
    std::string dump_name =
        base::StringPrintf("gpu/transfer_memory/client_%d/buffer_%d",
                           memory_tracker_->ClientId(), buffer_id);
    MemoryAllocatorDump* dump = pmd->CreateAllocatorDump(dump_name);
    dump->AddScalar(MemoryAllocatorDump::kNameSize,
                    MemoryAllocatorDump::kUnitsBytes, buffer->size());

    auto shared_memory_guid = buffer->backing()->GetGUID();
    if (!shared_memory_guid.is_empty()) {
      pmd->CreateSharedMemoryOwnershipEdge(dump->guid(), shared_memory_guid,
                                           0 /* importance */);
    } else {
      auto guid = GetBufferGUIDForTracing(memory_tracker_->ClientTracingId(),
                                          buffer_id);
      pmd->CreateSharedGlobalAllocatorDump(guid);
      pmd->AddOwnershipEdge(dump->guid(), guid);
    }
  }

  return true;
}

}  // namespace gpu