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[REMOTE-SHUFFLE-11] Support DAOS Object Async API (#14)
Reconstruct IO Layer and Support DAOS Object Async API Signed-off-by: jiafu zhang <jiafu.zhang@intel.com>
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187 changes: 187 additions & 0 deletions
187
shuffle-daos/src/main/java/org/apache/spark/shuffle/daos/DaosReaderAsync.java
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| @@ -0,0 +1,187 @@ | ||
| /* | ||
| * (C) Copyright 2018-2021 Intel Corporation. | ||
| * | ||
| * Licensed under the Apache License, Version 2.0 (the "License"); | ||
| * you may not use this file except in compliance with the License. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| * | ||
| * GOVERNMENT LICENSE RIGHTS-OPEN SOURCE SOFTWARE | ||
| * The Government's rights to use, modify, reproduce, release, perform, display, | ||
| * or disclose this software are subject to the terms of the Apache License as | ||
| * provided in Contract No. B609815. | ||
| * Any reproduction of computer software, computer software documentation, or | ||
| * portions thereof marked with this legend must also reproduce the markings. | ||
| */ | ||
|
|
||
| package org.apache.spark.shuffle.daos; | ||
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| import io.daos.DaosEventQueue; | ||
| import io.daos.TimedOutException; | ||
| import io.daos.obj.DaosObject; | ||
| import io.daos.obj.IODataDescBase; | ||
| import io.daos.obj.IOSimpleDDAsync; | ||
| import io.netty.buffer.ByteBuf; | ||
|
|
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| import java.io.IOException; | ||
| import java.util.*; | ||
|
|
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| public class DaosReaderAsync extends DaosReaderBase { | ||
|
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| private DaosEventQueue eq; | ||
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| private Set<IOSimpleDDAsync> runningDescSet = new LinkedHashSet<>(); | ||
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| private LinkedList<IOSimpleDDAsync> readyList = new LinkedList<>(); | ||
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| private List<DaosEventQueue.Attachment> completedList = new LinkedList<>(); | ||
|
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| public DaosReaderAsync(DaosObject object, ReaderConfig config) throws IOException { | ||
| super(object, config); | ||
| eq = DaosEventQueue.getInstance(0); | ||
| } | ||
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| @Override | ||
| protected IODataDescBase createFetchDataDesc(String reduceId) throws IOException { | ||
| return object.createAsyncDataDescForFetch(reduceId, eq.getEqWrapperHdl()); | ||
| } | ||
|
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| @Override | ||
| protected void addFetchEntry(IODataDescBase desc, String mapId, long offset, long readSize) throws IOException { | ||
| if (readSize > Integer.MAX_VALUE) { | ||
| throw new IllegalArgumentException("readSize should not exceed " + Integer.MAX_VALUE); | ||
| } | ||
| ((IOSimpleDDAsync) desc).addEntryForFetch(mapId, offset, (int)readSize); | ||
| } | ||
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| @Override | ||
| public ByteBuf nextBuf() throws IOException { | ||
| ByteBuf buf = tryCurrentEntry(); | ||
| if (buf != null) { | ||
| return buf; | ||
| } | ||
| // next entry | ||
| buf = tryCurrentDesc(); | ||
| if (buf != null) { | ||
| return buf; | ||
| } | ||
| // next desc | ||
| entryIdx = 0; | ||
| return readFromDaos(); | ||
| } | ||
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| private ByteBuf enterNewDesc(IOSimpleDDAsync desc) throws IOException { | ||
| if (currentDesc != null) { | ||
| currentDesc.release(); | ||
| } | ||
| currentDesc = desc; | ||
| return validateLastEntryAndGetBuf(desc.getEntry(entryIdx)); | ||
| } | ||
|
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| private IOSimpleDDAsync nextDesc() throws IOException { | ||
| return readyList.poll(); | ||
| } | ||
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| private void progress() throws IOException { | ||
| if (runningDescSet.isEmpty()) { | ||
| return; | ||
| } | ||
| completedList.clear(); | ||
| long timeOutMs = config.getWaitDataTimeMs(); | ||
| long start = System.currentTimeMillis(); | ||
| int n = eq.pollCompleted(completedList, runningDescSet.size(), timeOutMs); | ||
| while (n == 0) { | ||
| long dur = System.currentTimeMillis() - start; | ||
| if (dur > timeOutMs) { | ||
| throw new TimedOutException("timed out after " + dur); | ||
| } | ||
| n = eq.pollCompleted(completedList, runningDescSet.size(), timeOutMs - dur); | ||
| } | ||
| verifyCompleted(); | ||
| } | ||
|
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| private ByteBuf readFromDaos() throws IOException { | ||
| if (runningDescSet.isEmpty()) { | ||
| DaosEventQueue.Event event = null; | ||
| TimedOutException te = null; | ||
| try { | ||
| event = acquireEvent(); | ||
| } catch (TimedOutException e) { | ||
| te = e; | ||
| } | ||
| IOSimpleDDAsync taskDesc = (IOSimpleDDAsync) createNextDesc(config.getMaxBytesInFlight()); | ||
| if (taskDesc == null) { | ||
| if (event != null) { | ||
| event.putBack(); | ||
| } | ||
| return null; | ||
| } | ||
| if (te != null) { // have data to read, but no event | ||
| throw te; | ||
| } | ||
| runningDescSet.add(taskDesc); | ||
| taskDesc.setEvent(event); | ||
| try { | ||
| object.fetchAsync(taskDesc); | ||
| } catch (IOException e) { | ||
| taskDesc.release(); | ||
| runningDescSet.remove(taskDesc); | ||
| throw e; | ||
| } | ||
| } | ||
| progress(); | ||
| IOSimpleDDAsync desc = nextDesc(); | ||
| if (desc != null) { | ||
| return enterNewDesc(desc); | ||
| } | ||
| return null; | ||
| } | ||
|
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| private DaosEventQueue.Event acquireEvent() throws IOException { | ||
| completedList.clear(); | ||
| DaosEventQueue.Event event = eq.acquireEventBlocking(config.getWaitDataTimeMs(), completedList); | ||
| verifyCompleted(); | ||
| return event; | ||
| } | ||
|
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| private void verifyCompleted() throws IOException { | ||
| IOSimpleDDAsync failed = null; | ||
| int failedCnt = 0; | ||
| for (DaosEventQueue.Attachment attachment : completedList) { | ||
| if (runningDescSet.contains(attachment)) { | ||
| IOSimpleDDAsync desc = (IOSimpleDDAsync) attachment; | ||
| runningDescSet.remove(attachment); | ||
| if (desc.isSucceeded()) { | ||
| readyList.add(desc); | ||
| continue; | ||
| } | ||
| failedCnt++; | ||
| if (failed == null) { | ||
| failed = desc; | ||
| } | ||
| } | ||
| } | ||
| if (failedCnt > 0) { | ||
| throw new IOException("failed to read " + failedCnt + " IOSimpleDDAsync. First failed is " + failed); | ||
| } | ||
| } | ||
|
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| @Override | ||
| public void close(boolean force) { | ||
| readyList.forEach(desc -> desc.release()); | ||
| runningDescSet.forEach(desc -> desc.release()); | ||
| if (!(readyList.isEmpty() && runningDescSet.isEmpty())) { | ||
| StringBuilder sb = new StringBuilder(); | ||
| sb.append(readyList.isEmpty() ? "" : "not all data consumed. "); | ||
| sb.append(runningDescSet.isEmpty() ? "" : "some data is on flight"); | ||
| throw new IllegalStateException(sb.toString()); | ||
| } | ||
| } | ||
| } |
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