541 lines
20 KiB
C++
541 lines
20 KiB
C++
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/*
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* Copyright (C) 2022 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#define LOG_TAG "AidlBufferPool"
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//#define LOG_NDEBUG 0
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#include <sys/types.h>
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#include <stdint.h>
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#include <time.h>
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#include <unistd.h>
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#include <utils/Log.h>
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#include <thread>
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#include "Accessor.h"
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#include "BufferPool.h"
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#include "Connection.h"
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#include "DataHelper.h"
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namespace aidl::android::hardware::media::bufferpool2::implementation {
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namespace {
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static constexpr int64_t kCleanUpDurationMs = 500; // 0.5 sec
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static constexpr int64_t kLogDurationMs = 5000; // 5 secs
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static constexpr size_t kMinAllocBytesForEviction = 1024*1024*15;
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static constexpr size_t kMinBufferCountForEviction = 25;
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static constexpr size_t kMaxUnusedBufferCount = 64;
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static constexpr size_t kUnusedBufferCountTarget = kMaxUnusedBufferCount - 16;
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}
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BufferPool::BufferPool()
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: mTimestampMs(::android::elapsedRealtime()),
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mLastCleanUpMs(mTimestampMs),
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mLastLogMs(mTimestampMs),
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mSeq(0),
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mStartSeq(0) {
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mValid = mInvalidationChannel.isValid();
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}
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// Statistics helper
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template<typename T, typename S>
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int percentage(T base, S total) {
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return int(total ? 0.5 + 100. * static_cast<S>(base) / total : 0);
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}
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std::atomic<std::uint32_t> BufferPool::Invalidation::sInvSeqId(0);
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BufferPool::~BufferPool() {
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std::lock_guard<std::mutex> lock(mMutex);
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ALOGD("Destruction - bufferpool2 %p "
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"cached: %zu/%zuM, %zu/%d%% in use; "
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"allocs: %zu, %d%% recycled; "
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"transfers: %zu, %d%% unfetched",
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this, mStats.mBuffersCached, mStats.mSizeCached >> 20,
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mStats.mBuffersInUse, percentage(mStats.mBuffersInUse, mStats.mBuffersCached),
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mStats.mTotalAllocations, percentage(mStats.mTotalRecycles, mStats.mTotalAllocations),
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mStats.mTotalTransfers,
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percentage(mStats.mTotalTransfers - mStats.mTotalFetches, mStats.mTotalTransfers));
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}
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void BufferPool::Invalidation::onConnect(
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ConnectionId conId, const std::shared_ptr<IObserver>& observer) {
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mAcks[conId] = mInvalidationId; // starts from current invalidationId
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mObservers.insert(std::make_pair(conId, observer));
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}
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void BufferPool::Invalidation::onClose(ConnectionId conId) {
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mAcks.erase(conId);
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mObservers.erase(conId);
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}
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void BufferPool::Invalidation::onAck(
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ConnectionId conId,
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uint32_t msgId) {
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auto it = mAcks.find(conId);
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if (it == mAcks.end()) {
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ALOGW("ACK from inconsistent connection! %lld", (long long)conId);
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return;
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}
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if (isMessageLater(msgId, it->second)) {
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mAcks[conId] = msgId;
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}
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}
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void BufferPool::Invalidation::onBufferInvalidated(
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BufferId bufferId,
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BufferInvalidationChannel &channel) {
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for (auto it = mPendings.begin(); it != mPendings.end();) {
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if (it->isInvalidated(bufferId)) {
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uint32_t msgId = 0;
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if (it->mNeedsAck) {
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msgId = ++mInvalidationId;
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if (msgId == 0) {
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// wrap happens
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msgId = ++mInvalidationId;
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}
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}
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channel.postInvalidation(msgId, it->mFrom, it->mTo);
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it = mPendings.erase(it);
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continue;
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}
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++it;
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}
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}
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void BufferPool::Invalidation::onInvalidationRequest(
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bool needsAck,
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uint32_t from,
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uint32_t to,
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size_t left,
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BufferInvalidationChannel &channel,
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const std::shared_ptr<Accessor> &impl) {
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uint32_t msgId = 0;
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if (needsAck) {
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msgId = ++mInvalidationId;
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if (msgId == 0) {
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// wrap happens
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msgId = ++mInvalidationId;
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}
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}
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ALOGV("bufferpool2 invalidation requested and queued");
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if (left == 0) {
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channel.postInvalidation(msgId, from, to);
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} else {
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ALOGV("bufferpoo2 invalidation requested and pending");
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Pending pending(needsAck, from, to, left, impl);
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mPendings.push_back(pending);
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}
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Accessor::sInvalidator->addAccessor(mId, impl);
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}
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void BufferPool::Invalidation::onHandleAck(
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std::map<ConnectionId, const std::shared_ptr<IObserver>> *observers,
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uint32_t *invalidationId) {
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if (mInvalidationId != 0) {
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*invalidationId = mInvalidationId;
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std::set<int> deads;
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for (auto it = mAcks.begin(); it != mAcks.end(); ++it) {
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if (it->second != mInvalidationId) {
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const std::shared_ptr<IObserver> observer = mObservers[it->first];
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if (observer) {
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observers->emplace(it->first, observer);
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ALOGV("connection %lld will call observer (%u: %u)",
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(long long)it->first, it->second, mInvalidationId);
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// N.B: onMessage will be called later. ignore possibility of
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// onMessage# oneway call being lost.
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it->second = mInvalidationId;
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} else {
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ALOGV("bufferpool2 observer died %lld", (long long)it->first);
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deads.insert(it->first);
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}
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}
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}
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if (deads.size() > 0) {
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for (auto it = deads.begin(); it != deads.end(); ++it) {
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onClose(*it);
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}
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}
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}
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if (mPendings.size() == 0) {
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// All invalidation Ids are synced and no more pending invalidations.
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Accessor::sInvalidator->delAccessor(mId);
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}
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}
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bool BufferPool::handleOwnBuffer(
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ConnectionId connectionId, BufferId bufferId) {
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bool added = insert(&mUsingBuffers, connectionId, bufferId);
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if (added) {
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auto iter = mBuffers.find(bufferId);
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iter->second->mOwnerCount++;
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}
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insert(&mUsingConnections, bufferId, connectionId);
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return added;
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}
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bool BufferPool::handleReleaseBuffer(
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ConnectionId connectionId, BufferId bufferId) {
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bool deleted = erase(&mUsingBuffers, connectionId, bufferId);
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if (deleted) {
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auto iter = mBuffers.find(bufferId);
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iter->second->mOwnerCount--;
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if (iter->second->mOwnerCount == 0 &&
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iter->second->mTransactionCount == 0) {
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if (!iter->second->mInvalidated) {
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mStats.onBufferUnused(iter->second->mAllocSize);
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mFreeBuffers.insert(bufferId);
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} else {
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mStats.onBufferUnused(iter->second->mAllocSize);
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mStats.onBufferEvicted(iter->second->mAllocSize);
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mBuffers.erase(iter);
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mInvalidation.onBufferInvalidated(bufferId, mInvalidationChannel);
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}
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}
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}
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erase(&mUsingConnections, bufferId, connectionId);
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ALOGV("release buffer %u : %d", bufferId, deleted);
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return deleted;
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}
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bool BufferPool::handleTransferTo(const BufferStatusMessage &message) {
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auto completed = mCompletedTransactions.find(
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message.transactionId);
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if (completed != mCompletedTransactions.end()) {
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// already completed
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mCompletedTransactions.erase(completed);
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return true;
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}
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// the buffer should exist and be owned.
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auto bufferIter = mBuffers.find(message.bufferId);
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if (bufferIter == mBuffers.end() ||
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!contains(&mUsingBuffers, message.connectionId, FromAidl(message.bufferId))) {
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return false;
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}
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auto found = mTransactions.find(message.transactionId);
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if (found != mTransactions.end()) {
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// transfer_from was received earlier.
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found->second->mSender = message.connectionId;
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found->second->mSenderValidated = true;
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return true;
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}
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if (mConnectionIds.find(message.targetConnectionId) == mConnectionIds.end()) {
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// N.B: it could be fake or receive connection already closed.
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ALOGD("bufferpool2 %p receiver connection %lld is no longer valid",
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this, (long long)message.targetConnectionId);
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return false;
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}
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mStats.onBufferSent();
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mTransactions.insert(std::make_pair(
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message.transactionId,
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std::make_unique<TransactionStatus>(message, mTimestampMs)));
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insert(&mPendingTransactions, message.targetConnectionId,
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FromAidl(message.transactionId));
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bufferIter->second->mTransactionCount++;
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return true;
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}
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bool BufferPool::handleTransferFrom(const BufferStatusMessage &message) {
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auto found = mTransactions.find(message.transactionId);
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if (found == mTransactions.end()) {
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// TODO: is it feasible to check ownership here?
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mStats.onBufferSent();
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mTransactions.insert(std::make_pair(
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message.transactionId,
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std::make_unique<TransactionStatus>(message, mTimestampMs)));
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insert(&mPendingTransactions, message.connectionId,
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FromAidl(message.transactionId));
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auto bufferIter = mBuffers.find(message.bufferId);
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bufferIter->second->mTransactionCount++;
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} else {
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if (message.connectionId == found->second->mReceiver) {
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found->second->mStatus = BufferStatus::TRANSFER_FROM;
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}
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}
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return true;
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}
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bool BufferPool::handleTransferResult(const BufferStatusMessage &message) {
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auto found = mTransactions.find(message.transactionId);
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if (found != mTransactions.end()) {
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bool deleted = erase(&mPendingTransactions, message.connectionId,
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FromAidl(message.transactionId));
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if (deleted) {
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if (!found->second->mSenderValidated) {
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mCompletedTransactions.insert(message.transactionId);
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}
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auto bufferIter = mBuffers.find(message.bufferId);
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if (message.status == BufferStatus::TRANSFER_OK) {
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handleOwnBuffer(message.connectionId, message.bufferId);
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}
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bufferIter->second->mTransactionCount--;
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if (bufferIter->second->mOwnerCount == 0
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&& bufferIter->second->mTransactionCount == 0) {
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if (!bufferIter->second->mInvalidated) {
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mStats.onBufferUnused(bufferIter->second->mAllocSize);
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mFreeBuffers.insert(message.bufferId);
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} else {
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mStats.onBufferUnused(bufferIter->second->mAllocSize);
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mStats.onBufferEvicted(bufferIter->second->mAllocSize);
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mBuffers.erase(bufferIter);
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mInvalidation.onBufferInvalidated(message.bufferId, mInvalidationChannel);
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}
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}
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mTransactions.erase(found);
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}
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ALOGV("transfer finished %llu %u - %d", (unsigned long long)message.transactionId,
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message.bufferId, deleted);
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return deleted;
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}
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ALOGV("transfer not found %llu %u", (unsigned long long)message.transactionId,
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message.bufferId);
|
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return false;
|
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}
|
||
|
|
|
||
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void BufferPool::processStatusMessages() {
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std::vector<BufferStatusMessage> messages;
|
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mObserver.getBufferStatusChanges(messages);
|
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mTimestampMs = ::android::elapsedRealtime();
|
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for (BufferStatusMessage& message: messages) {
|
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bool ret = false;
|
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switch (message.status) {
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case BufferStatus::NOT_USED:
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ret = handleReleaseBuffer(
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message.connectionId, message.bufferId);
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break;
|
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case BufferStatus::USED:
|
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// not happening
|
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break;
|
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case BufferStatus::TRANSFER_TO:
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ret = handleTransferTo(message);
|
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break;
|
||
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case BufferStatus::TRANSFER_FROM:
|
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ret = handleTransferFrom(message);
|
||
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break;
|
||
|
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case BufferStatus::TRANSFER_TIMEOUT:
|
||
|
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// TODO
|
||
|
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break;
|
||
|
|
case BufferStatus::TRANSFER_LOST:
|
||
|
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// TODO
|
||
|
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break;
|
||
|
|
case BufferStatus::TRANSFER_FETCH:
|
||
|
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// not happening
|
||
|
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break;
|
||
|
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case BufferStatus::TRANSFER_OK:
|
||
|
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case BufferStatus::TRANSFER_ERROR:
|
||
|
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ret = handleTransferResult(message);
|
||
|
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break;
|
||
|
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case BufferStatus::INVALIDATION_ACK:
|
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|
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mInvalidation.onAck(message.connectionId, message.bufferId);
|
||
|
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ret = true;
|
||
|
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break;
|
||
|
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}
|
||
|
|
if (ret == false) {
|
||
|
|
ALOGW("buffer status message processing failure - message : %d connection : %lld",
|
||
|
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message.status, (long long)message.connectionId);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
messages.clear();
|
||
|
|
}
|
||
|
|
|
||
|
|
bool BufferPool::handleClose(ConnectionId connectionId) {
|
||
|
|
// Cleaning buffers
|
||
|
|
auto buffers = mUsingBuffers.find(connectionId);
|
||
|
|
if (buffers != mUsingBuffers.end()) {
|
||
|
|
for (const BufferId& bufferId : buffers->second) {
|
||
|
|
bool deleted = erase(&mUsingConnections, bufferId, connectionId);
|
||
|
|
if (deleted) {
|
||
|
|
auto bufferIter = mBuffers.find(bufferId);
|
||
|
|
bufferIter->second->mOwnerCount--;
|
||
|
|
if (bufferIter->second->mOwnerCount == 0 &&
|
||
|
|
bufferIter->second->mTransactionCount == 0) {
|
||
|
|
// TODO: handle freebuffer insert fail
|
||
|
|
if (!bufferIter->second->mInvalidated) {
|
||
|
|
mStats.onBufferUnused(bufferIter->second->mAllocSize);
|
||
|
|
mFreeBuffers.insert(bufferId);
|
||
|
|
} else {
|
||
|
|
mStats.onBufferUnused(bufferIter->second->mAllocSize);
|
||
|
|
mStats.onBufferEvicted(bufferIter->second->mAllocSize);
|
||
|
|
mBuffers.erase(bufferIter);
|
||
|
|
mInvalidation.onBufferInvalidated(bufferId, mInvalidationChannel);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
mUsingBuffers.erase(buffers);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Cleaning transactions
|
||
|
|
auto pending = mPendingTransactions.find(connectionId);
|
||
|
|
if (pending != mPendingTransactions.end()) {
|
||
|
|
for (const TransactionId& transactionId : pending->second) {
|
||
|
|
auto iter = mTransactions.find(transactionId);
|
||
|
|
if (iter != mTransactions.end()) {
|
||
|
|
if (!iter->second->mSenderValidated) {
|
||
|
|
mCompletedTransactions.insert(transactionId);
|
||
|
|
}
|
||
|
|
BufferId bufferId = iter->second->mBufferId;
|
||
|
|
auto bufferIter = mBuffers.find(bufferId);
|
||
|
|
bufferIter->second->mTransactionCount--;
|
||
|
|
if (bufferIter->second->mOwnerCount == 0 &&
|
||
|
|
bufferIter->second->mTransactionCount == 0) {
|
||
|
|
// TODO: handle freebuffer insert fail
|
||
|
|
if (!bufferIter->second->mInvalidated) {
|
||
|
|
mStats.onBufferUnused(bufferIter->second->mAllocSize);
|
||
|
|
mFreeBuffers.insert(bufferId);
|
||
|
|
} else {
|
||
|
|
mStats.onBufferUnused(bufferIter->second->mAllocSize);
|
||
|
|
mStats.onBufferEvicted(bufferIter->second->mAllocSize);
|
||
|
|
mBuffers.erase(bufferIter);
|
||
|
|
mInvalidation.onBufferInvalidated(bufferId, mInvalidationChannel);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
mTransactions.erase(iter);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
mConnectionIds.erase(connectionId);
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
bool BufferPool::getFreeBuffer(
|
||
|
|
const std::shared_ptr<BufferPoolAllocator> &allocator,
|
||
|
|
const std::vector<uint8_t> ¶ms, BufferId *pId,
|
||
|
|
const native_handle_t** handle) {
|
||
|
|
auto bufferIt = mFreeBuffers.begin();
|
||
|
|
for (;bufferIt != mFreeBuffers.end(); ++bufferIt) {
|
||
|
|
BufferId bufferId = *bufferIt;
|
||
|
|
if (allocator->compatible(params, mBuffers[bufferId]->mConfig)) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (bufferIt != mFreeBuffers.end()) {
|
||
|
|
BufferId id = *bufferIt;
|
||
|
|
mFreeBuffers.erase(bufferIt);
|
||
|
|
mStats.onBufferRecycled(mBuffers[id]->mAllocSize);
|
||
|
|
*handle = mBuffers[id]->handle();
|
||
|
|
*pId = id;
|
||
|
|
ALOGV("recycle a buffer %u %p", id, *handle);
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
BufferPoolStatus BufferPool::addNewBuffer(
|
||
|
|
const std::shared_ptr<BufferPoolAllocation> &alloc,
|
||
|
|
const size_t allocSize,
|
||
|
|
const std::vector<uint8_t> ¶ms,
|
||
|
|
BufferId *pId,
|
||
|
|
const native_handle_t** handle) {
|
||
|
|
|
||
|
|
BufferId bufferId = mSeq++;
|
||
|
|
if (mSeq == Connection::SYNC_BUFFERID) {
|
||
|
|
mSeq = 0;
|
||
|
|
}
|
||
|
|
std::unique_ptr<InternalBuffer> buffer =
|
||
|
|
std::make_unique<InternalBuffer>(
|
||
|
|
bufferId, alloc, allocSize, params);
|
||
|
|
if (buffer) {
|
||
|
|
auto res = mBuffers.insert(std::make_pair(
|
||
|
|
bufferId, std::move(buffer)));
|
||
|
|
if (res.second) {
|
||
|
|
mStats.onBufferAllocated(allocSize);
|
||
|
|
*handle = alloc->handle();
|
||
|
|
*pId = bufferId;
|
||
|
|
return ResultStatus::OK;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return ResultStatus::NO_MEMORY;
|
||
|
|
}
|
||
|
|
|
||
|
|
void BufferPool::cleanUp(bool clearCache) {
|
||
|
|
if (clearCache || mTimestampMs > mLastCleanUpMs + kCleanUpDurationMs ||
|
||
|
|
mStats.buffersNotInUse() > kMaxUnusedBufferCount) {
|
||
|
|
mLastCleanUpMs = mTimestampMs;
|
||
|
|
if (mTimestampMs > mLastLogMs + kLogDurationMs ||
|
||
|
|
mStats.buffersNotInUse() > kMaxUnusedBufferCount) {
|
||
|
|
mLastLogMs = mTimestampMs;
|
||
|
|
ALOGD("bufferpool2 %p : %zu(%zu size) total buffers - "
|
||
|
|
"%zu(%zu size) used buffers - %zu/%zu (recycle/alloc) - "
|
||
|
|
"%zu/%zu (fetch/transfer)",
|
||
|
|
this, mStats.mBuffersCached, mStats.mSizeCached,
|
||
|
|
mStats.mBuffersInUse, mStats.mSizeInUse,
|
||
|
|
mStats.mTotalRecycles, mStats.mTotalAllocations,
|
||
|
|
mStats.mTotalFetches, mStats.mTotalTransfers);
|
||
|
|
}
|
||
|
|
for (auto freeIt = mFreeBuffers.begin(); freeIt != mFreeBuffers.end();) {
|
||
|
|
if (!clearCache && mStats.buffersNotInUse() <= kUnusedBufferCountTarget &&
|
||
|
|
(mStats.mSizeCached < kMinAllocBytesForEviction ||
|
||
|
|
mBuffers.size() < kMinBufferCountForEviction)) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
auto it = mBuffers.find(*freeIt);
|
||
|
|
if (it != mBuffers.end() &&
|
||
|
|
it->second->mOwnerCount == 0 && it->second->mTransactionCount == 0) {
|
||
|
|
mStats.onBufferEvicted(it->second->mAllocSize);
|
||
|
|
mBuffers.erase(it);
|
||
|
|
freeIt = mFreeBuffers.erase(freeIt);
|
||
|
|
} else {
|
||
|
|
++freeIt;
|
||
|
|
ALOGW("bufferpool2 inconsistent!");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void BufferPool::invalidate(
|
||
|
|
bool needsAck, BufferId from, BufferId to,
|
||
|
|
const std::shared_ptr<Accessor> &impl) {
|
||
|
|
for (auto freeIt = mFreeBuffers.begin(); freeIt != mFreeBuffers.end();) {
|
||
|
|
if (isBufferInRange(from, to, *freeIt)) {
|
||
|
|
auto it = mBuffers.find(*freeIt);
|
||
|
|
if (it != mBuffers.end() &&
|
||
|
|
it->second->mOwnerCount == 0 && it->second->mTransactionCount == 0) {
|
||
|
|
mStats.onBufferEvicted(it->second->mAllocSize);
|
||
|
|
mBuffers.erase(it);
|
||
|
|
freeIt = mFreeBuffers.erase(freeIt);
|
||
|
|
continue;
|
||
|
|
} else {
|
||
|
|
ALOGW("bufferpool2 inconsistent!");
|
||
|
|
}
|
||
|
|
}
|
||
|
|
++freeIt;
|
||
|
|
}
|
||
|
|
|
||
|
|
size_t left = 0;
|
||
|
|
for (auto it = mBuffers.begin(); it != mBuffers.end(); ++it) {
|
||
|
|
if (isBufferInRange(from, to, it->first)) {
|
||
|
|
it->second->invalidate();
|
||
|
|
++left;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
mInvalidation.onInvalidationRequest(needsAck, from, to, left, mInvalidationChannel, impl);
|
||
|
|
}
|
||
|
|
|
||
|
|
void BufferPool::flush(const std::shared_ptr<Accessor> &impl) {
|
||
|
|
BufferId from = mStartSeq;
|
||
|
|
BufferId to = mSeq;
|
||
|
|
mStartSeq = mSeq;
|
||
|
|
// TODO: needsAck params
|
||
|
|
ALOGV("buffer invalidation request bp:%u %u %u", mInvalidation.mId, from, to);
|
||
|
|
if (from != to) {
|
||
|
|
invalidate(true, from, to, impl);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
} // namespace aidl::android::hardware::media::bufferpool2::implementation
|