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99 lines
3.0 KiB
99 lines
3.0 KiB
7 months ago
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/*
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* Copyright (C) 2020 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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#include "chre/platform/shared/dram_vote_client.h"
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#include <cinttypes>
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#include "chre/platform/assert.h"
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#include "chre/platform/fatal_error.h"
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#include "chre/platform/log.h"
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#include "chre/platform/system_time.h"
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namespace chre {
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void DramVoteClient::voteDramAccess(bool enabled) {
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LockGuard<Mutex> lock(mMutex);
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mLastDramRequest = enabled;
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bool needDram = (enabled || mDramVoteCount > 0);
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if (needDram != mLastDramVote) {
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issueDramVote(needDram);
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mLastDramVote = needDram;
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}
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}
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void DramVoteClient::incrementDramVoteCount() {
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LockGuard<Mutex> lock(mMutex);
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if (mDramVoteCount++ == 0) {
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mVoteCountStart = Milliseconds(SystemTime::getMonotonicTime());
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// TODO(b/181172259): Change back to LOGW once buffered logging path is
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// refactored.
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// LOGW("DRAM vote count begins");
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printf("CHRE: DRAM vote count begins");
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if (!mLastDramVote) {
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// Do not call voteDramAccess() directly as it will override
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// mLastDramRequest.
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issueDramVote(true /* enabled */);
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mLastDramVote = true;
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}
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} else {
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checkDramDuration();
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}
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}
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void DramVoteClient::decrementDramVoteCount() {
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LockGuard<Mutex> lock(mMutex);
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CHRE_ASSERT_LOG(mDramVoteCount > 0,
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"Tried to decrement DRAM vote count when it's 0");
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if (--mDramVoteCount == 0) {
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// TODO(b/181172259): Change back to LOGW once buffered logging path is
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// refactored.
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// LOGW("DRAM vote count ends: %" PRIu64 " ms", checkDramDuration());
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printf("CHRE: DRAM vote count ends: %" PRIu64 " ms", checkDramDuration());
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// There's no DRAM activity now, remove CHRE's DRAM access vote.
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if (!mLastDramRequest) {
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issueDramVote(false /* enabled */);
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mLastDramVote = false;
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}
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}
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}
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Milliseconds DramVoteClient::checkDramDuration() const {
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Milliseconds duration(0);
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if (mDramVoteCount > 0) {
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duration = Milliseconds(SystemTime::getMonotonicTime()) - mVoteCountStart;
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}
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// DRAM memory fallback only intends to handle a surge of DRAM memory
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// requests. If there's a prolonged period of memory fallback, this might
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// indicate a memory leak or inadequate SRAM heap size.
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if (duration > kMaxDramDuration) {
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FATAL_ERROR("Forced into DRAM for %" PRIu64 " msec",
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duration.getMilliseconds());
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}
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return duration;
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}
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//! Explicitly instantiate the DramVoteClient singleton to reduce code size.
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template class Singleton<DramVoteClient>;
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} // namespace chre
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