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HBASE-13307 Making methods under ScannerV2#next inlineable, faster

This commit is contained in:
stack 2015-04-17 08:15:07 -07:00
parent bcc5e1b353
commit 92af695ea1
6 changed files with 173 additions and 82 deletions
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13
hbase-common/src/main/java/org/apache/hadoop/hbase/util/Bytes.java
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@ -55,6 +55,7 @@ import sun.misc.Unsafe;
import com.google.common.annotations.VisibleForTesting;
import com.google.common.collect.Lists;
import org.apache.hadoop.hbase.util.Bytes.LexicographicalComparerHolder.UnsafeComparer;
/**
@ -62,6 +63,7 @@ import org.apache.hadoop.hbase.util.Bytes.LexicographicalComparerHolder.UnsafeCo
* comparisons, hash code generation, manufacturing keys for HashMaps or
* HashSets, and can be used as key in maps or trees.
*/
@SuppressWarnings("restriction")
@InterfaceAudience.Public
@InterfaceStability.Stable
@edu.umd.cs.findbugs.annotations.SuppressWarnings(
@ -121,6 +123,11 @@ public class Bytes implements Comparable<Bytes> {
*/
public static final int SIZEOF_SHORT = Short.SIZE / Byte.SIZE;
/**
* Mask to apply to a long to reveal the lower int only. Use like this:
* int i = (int)(0xFFFFFFFF00000000L ^ some_long_value);
*/
public static final long MASK_FOR_LOWER_INT_IN_LONG = 0xFFFFFFFF00000000L;
/**
* Estimate of size cost to pay beyond payload in jvm for instance of byte [].
@ -638,12 +645,12 @@ public class Bytes implements Comparable<Bytes> {
// Just in case we are passed a 'len' that is > buffer length...
if (off >= b.length) return result.toString();
if (off + len > b.length) len = b.length - off;
for (int i = off; i < off + len ; ++i ) {
for (int i = off; i < off + len ; ++i) {
int ch = b[i] & 0xFF;
if ( (ch >= '0' && ch <= '9')
|| (ch >= 'A' && ch <= 'Z')
|| (ch >= 'a' && ch <= 'z')
|| " `~!@#$%^&*()-_=+[]{}|;:'\",.<>/?".indexOf(ch) >= 0 ) {
|| " `~!@#$%^&*()-_=+[]{}|;:'\",.<>/?".indexOf(ch) >= 0) {
result.append((char)ch);
} else {
result.append(String.format("\\x%02X", ch));
@ -665,7 +672,7 @@ public class Bytes implements Comparable<Bytes> {
* @return The converted hex value as a byte.
*/
public static byte toBinaryFromHex(byte ch) {
if ( ch >= 'A' && ch <= 'F' )
if (ch >= 'A' && ch <= 'F')
return (byte) ((byte)10 + (byte) (ch - 'A'));
// else
return (byte) (ch - '0');

215
hbase-server/src/main/java/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.java
View File

@ -117,7 +117,7 @@ public class HFileReaderImpl implements HFile.Reader, Configurable {
private HFileContext hfileContext;
/** Filesystem-level block reader. */
protected HFileBlock.FSReader fsBlockReader;
private HFileBlock.FSReader fsBlockReader;
/**
* A "sparse lock" implementation allowing to lock on a particular block
@ -212,8 +212,8 @@ public class HFileReaderImpl implements HFile.Reader, Configurable {
fileInfo = new FileInfo();
fileInfo.read(blockIter.nextBlockWithBlockType(BlockType.FILE_INFO).getByteStream());
byte[] creationTimeBytes = fileInfo.get(FileInfo.CREATE_TIME_TS);
this.hfileContext.setFileCreateTime(creationTimeBytes == null ?
0 : Bytes.toLong(creationTimeBytes));
this.hfileContext.setFileCreateTime(creationTimeBytes == null? 0:
Bytes.toLong(creationTimeBytes));
lastKey = fileInfo.get(FileInfo.LASTKEY);
avgKeyLen = Bytes.toInt(fileInfo.get(FileInfo.AVG_KEY_LEN));
avgValueLen = Bytes.toInt(fileInfo.get(FileInfo.AVG_VALUE_LEN));
@ -500,29 +500,79 @@ public class HFileReaderImpl implements HFile.Reader, Configurable {
}
protected void readKeyValueLen() {
blockBuffer.mark();
currKeyLen = blockBuffer.getInt();
currValueLen = blockBuffer.getInt();
if (currKeyLen < 0 || currValueLen < 0 || currKeyLen > blockBuffer.limit()
|| currValueLen > blockBuffer.limit()) {
throw new IllegalStateException("Invalid currKeyLen " + currKeyLen + " or currValueLen "
+ currValueLen + ". Block offset: "
+ block.getOffset() + ", block length: " + blockBuffer.limit() + ", position: "
+ blockBuffer.position() + " (without header).");
// This is a hot method. We go out of our way to make this method short so it can be
// inlined and is not too big to compile. We also manage position in ByteBuffer ourselves
// because it is faster than going via range-checked ByteBuffer methods or going through a
// byte buffer array a byte at a time.
int p = blockBuffer.position() + blockBuffer.arrayOffset();
// Get a long at a time rather than read two individual ints. In micro-benchmarking, even
// with the extra bit-fiddling, this is order-of-magnitude faster than getting two ints.
long ll = Bytes.toLong(blockBuffer.array(), p);
// Read top half as an int of key length and bottom int as value length
this.currKeyLen = (int)(ll >> Integer.SIZE);
this.currValueLen = (int)(Bytes.MASK_FOR_LOWER_INT_IN_LONG ^ ll);
checkKeyValueLen();
// Move position past the key and value lengths and then beyond the key and value
p += (Bytes.SIZEOF_LONG + currKeyLen + currValueLen);
if (reader.getFileContext().isIncludesTags()) {
// Tags length is a short.
this.currTagsLen = Bytes.toShort(blockBuffer.array(), p);
checkTagsLen();
p += (Bytes.SIZEOF_SHORT + currTagsLen);
}
ByteBufferUtils.skip(blockBuffer, currKeyLen + currValueLen);
if (this.reader.getFileContext().isIncludesTags()) {
// Read short as unsigned, high byte first
currTagsLen = ((blockBuffer.get() & 0xff) << 8) ^ (blockBuffer.get() & 0xff);
if (currTagsLen < 0 || currTagsLen > blockBuffer.limit()) {
throw new IllegalStateException("Invalid currTagsLen " + currTagsLen + ". Block offset: "
+ block.getOffset() + ", block length: " + blockBuffer.limit() + ", position: "
+ blockBuffer.position() + " (without header).");
readMvccVersion(p);
}
private final void checkTagsLen() {
if (checkLen(this.currTagsLen)) {
throw new IllegalStateException("Invalid currTagsLen " + this.currTagsLen +
". Block offset: " + block.getOffset() + ", block length: " + this.blockBuffer.limit() +
", position: " + this.blockBuffer.position() + " (without header).");
}
}
/**
* Read mvcc. Does checks to see if we even need to read the mvcc at all.
* @param position
*/
protected void readMvccVersion(final int position) {
// See if we even need to decode mvcc.
if (!this.reader.shouldIncludeMemstoreTS()) return;
if (!this.reader.isDecodeMemstoreTS()) {
currMemstoreTS = 0;
currMemstoreTSLen = 1;
return;
}
_readMvccVersion(position);
}
/**
* Actually do the mvcc read. Does no checks.
* @param position
*/
private void _readMvccVersion(final int position) {
// This is Bytes#bytesToVint inlined so can save a few instructions in this hot method; i.e.
// previous if one-byte vint, we'd redo the vint call to find int size.
// Also the method is kept small so can be inlined.
byte firstByte = blockBuffer.array()[position];
int len = WritableUtils.decodeVIntSize(firstByte);
if (len == 1) {
this.currMemstoreTS = firstByte;
} else {
long i = 0;
for (int idx = 0; idx < len - 1; idx++) {
byte b = blockBuffer.array()[position + 1 + idx];
i = i << 8;
i = i | (b & 0xFF);
}
ByteBufferUtils.skip(blockBuffer, currTagsLen);
currMemstoreTS = (WritableUtils.isNegativeVInt(firstByte) ? ~i : i);
}
readMvccVersion();
blockBuffer.reset();
this.currMemstoreTSLen = len;
}
protected void readMvccVersion() {
// TODO CLEANUP!!!
readMvccVersion(blockBuffer.arrayOffset() + blockBuffer.position());
}
/**
@ -579,7 +629,8 @@ public class HFileReaderImpl implements HFile.Reader, Configurable {
}
}
blockBuffer.reset();
int keyOffset = blockBuffer.arrayOffset() + blockBuffer.position() + (Bytes.SIZEOF_INT * 2);
int keyOffset =
blockBuffer.arrayOffset() + blockBuffer.position() + (Bytes.SIZEOF_INT * 2);
keyOnlyKv.setKey(blockBuffer.array(), keyOffset, klen);
int comp = reader.getComparator().compareOnlyKeyPortion(key, keyOnlyKv);
@ -814,16 +865,9 @@ public class HFileReaderImpl implements HFile.Reader, Configurable {
}
/**
* Go to the next key/value in the block section. Loads the next block if
* necessary. If successful, {@link #getKey()} and {@link #getValue()} can
* be called.
*
* @return true if successfully navigated to the next key/value
* Set the position on current backing blockBuffer.
*/
@Override
public boolean next() throws IOException {
assertSeeked();
private void positionThisBlockBuffer() {
try {
blockBuffer.position(getNextCellStartPosition());
} catch (IllegalArgumentException e) {
@ -834,25 +878,39 @@ public class HFileReaderImpl implements HFile.Reader, Configurable {
+ "; currBlock currBlockOffset = " + block.getOffset());
throw e;
}
}
/**
* Set our selves up for the next 'next' invocation, set up next block.
* @return True is more to read else false if at the end.
* @throws IOException
*/
private boolean positionForNextBlock() throws IOException {
// Methods are small so they get inlined because they are 'hot'.
long lastDataBlockOffset = reader.getTrailer().getLastDataBlockOffset();
if (block.getOffset() >= lastDataBlockOffset) {
setNonSeekedState();
return false;
}
return isNextBlock();
}
private boolean isNextBlock() throws IOException {
// Methods are small so they get inlined because they are 'hot'.
HFileBlock nextBlock = readNextDataBlock();
if (nextBlock == null) {
setNonSeekedState();
return false;
}
updateCurrBlock(nextBlock);
return true;
}
private final boolean _next() throws IOException {
// Small method so can be inlined. It is a hot one.
if (blockBuffer.remaining() <= 0) {
long lastDataBlockOffset =
reader.getTrailer().getLastDataBlockOffset();
if (block.getOffset() >= lastDataBlockOffset) {
setNonSeekedState();
return false;
}
// read the next block
HFileBlock nextBlock = readNextDataBlock();
if (nextBlock == null) {
setNonSeekedState();
return false;
}
updateCurrBlock(nextBlock);
return true;
return positionForNextBlock();
}
// We are still in the same block.
@ -860,6 +918,22 @@ public class HFileReaderImpl implements HFile.Reader, Configurable {
return true;
}
/**
* Go to the next key/value in the block section. Loads the next block if
* necessary. If successful, {@link #getKey()} and {@link #getValue()} can
* be called.
*
* @return true if successfully navigated to the next key/value
*/
@Override
public boolean next() throws IOException {
// This is a hot method so extreme measures taken to ensure it is small and inlineable.
// Checked by setting: -XX:+UnlockDiagnosticVMOptions -XX:+PrintInlining -XX:+PrintCompilation
assertSeeked();
positionThisBlockBuffer();
return _next();
}
/**
* Positions this scanner at the start of the file.
*
@ -908,6 +982,26 @@ public class HFileReaderImpl implements HFile.Reader, Configurable {
return blockSeek(key, seekBefore);
}
/**
* @param v
* @return True if v < 0 or v > current block buffer limit.
*/
protected final boolean checkLen(final int v) {
return v < 0 || v > this.blockBuffer.limit();
}
/**
* Check key and value lengths are wholesome.
*/
protected final void checkKeyValueLen() {
if (checkLen(this.currKeyLen) || checkLen(this.currValueLen)) {
throw new IllegalStateException("Invalid currKeyLen " + this.currKeyLen +
" or currValueLen " + this.currValueLen + ". Block offset: " + block.getOffset() +
", block length: " + this.blockBuffer.limit() + ", position: " +
this.blockBuffer.position() + " (without header).");
}
}
/**
* Updates the current block to be the given {@link HFileBlock}. Seeks to
* the the first key/value pair.
@ -934,19 +1028,6 @@ public class HFileReaderImpl implements HFile.Reader, Configurable {
this.nextIndexedKey = null;
}
protected void readMvccVersion() {
if (this.reader.shouldIncludeMemstoreTS()) {
if (this.reader.isDecodeMemstoreTS()) {
currMemstoreTS = Bytes.readAsVLong(blockBuffer.array(), blockBuffer.arrayOffset()
+ blockBuffer.position());
currMemstoreTSLen = WritableUtils.getVIntSize(currMemstoreTS);
} else {
currMemstoreTS = 0;
currMemstoreTSLen = 1;
}
}
}
protected ByteBuffer getFirstKeyInBlock(HFileBlock curBlock) {
ByteBuffer buffer = curBlock.getBufferWithoutHeader();
// It is safe to manipulate this buffer because we own the buffer object.
@ -1014,7 +1095,7 @@ public class HFileReaderImpl implements HFile.Reader, Configurable {
*/
public final static int KEY_VALUE_LEN_SIZE = 2 * Bytes.SIZEOF_INT;
protected boolean includesMemstoreTS = false;
private boolean includesMemstoreTS = false;
protected boolean decodeMemstoreTS = false;
@ -1321,7 +1402,7 @@ public class HFileReaderImpl implements HFile.Reader, Configurable {
private final HFileBlockDecodingContext decodingCtx;
private final DataBlockEncoder.EncodedSeeker seeker;
private final DataBlockEncoder dataBlockEncoder;
protected final HFileContext meta;
private final HFileContext meta;
public EncodedScanner(HFile.Reader reader, boolean cacheBlocks,
boolean pread, boolean isCompaction, HFileContext meta) {
@ -1548,7 +1629,7 @@ public class HFileReaderImpl implements HFile.Reader, Configurable {
protected HFileContext createHFileContext(FSDataInputStreamWrapper fsdis, long fileSize,
HFileSystem hfs, Path path, FixedFileTrailer trailer) throws IOException {
HFileContextBuilder builder = new HFileContextBuilder()
.withIncludesMvcc(this.includesMemstoreTS)
.withIncludesMvcc(shouldIncludeMemstoreTS())
.withHBaseCheckSum(true)
.withCompression(this.compressAlgo);
@ -1593,7 +1674,7 @@ public class HFileReaderImpl implements HFile.Reader, Configurable {
HFileContext context = builder.build();
if (LOG.isTraceEnabled()) {
LOG.trace("Reader" + (path != null ? " for " + path : "" ) +
LOG.trace("Reader" + (path != null? " for " + path: "") +
" initialized with cacheConf: " + cacheConf +
" comparator: " + comparator.getClass().getSimpleName() +
" fileContext: " + context);

16
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HRegion.java
View File

@ -348,7 +348,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
private boolean disallowWritesInRecovering = false;
// when a region is in recovering state, it can only accept writes not reads
private volatile boolean isRecovering = false;
private volatile boolean recovering = false;
private volatile Optional<ConfigurationManager> configurationManager;
@ -706,7 +706,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
Map<String, Region> recoveringRegions = rsServices.getRecoveringRegions();
String encodedName = getRegionInfo().getEncodedName();
if (recoveringRegions != null && recoveringRegions.containsKey(encodedName)) {
this.isRecovering = true;
this.recovering = true;
recoveringRegions.put(encodedName, this);
}
} else {
@ -836,7 +836,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
// overlaps used sequence numbers
if (this.writestate.writesEnabled) {
nextSeqid = WALSplitter.writeRegionSequenceIdFile(this.fs.getFileSystem(), this.fs
.getRegionDir(), nextSeqid, (this.isRecovering ? (this.flushPerChanges + 10000000) : 1));
.getRegionDir(), nextSeqid, (this.recovering ? (this.flushPerChanges + 10000000) : 1));
} else {
nextSeqid++;
}
@ -1148,7 +1148,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
* Reset recovering state of current region
*/
public void setRecovering(boolean newState) {
boolean wasRecovering = this.isRecovering;
boolean wasRecovering = this.recovering;
// before we flip the recovering switch (enabling reads) we should write the region open
// event to WAL if needed
if (wal != null && getRegionServerServices() != null && !writestate.readOnly
@ -1189,8 +1189,8 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
}
}
this.isRecovering = newState;
if (wasRecovering && !isRecovering) {
this.recovering = newState;
if (wasRecovering && !recovering) {
// Call only when wal replay is over.
coprocessorHost.postLogReplay();
}
@ -1198,7 +1198,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
@Override
public boolean isRecovering() {
return this.isRecovering;
return this.recovering;
}
@Override
@ -5992,7 +5992,7 @@ public class HRegion implements HeapSize, PropagatingConfigurationObserver, Regi
this.openSeqNum = initialize(reporter);
this.setSequenceId(openSeqNum);
if (wal != null && getRegionServerServices() != null && !writestate.readOnly
&& !isRecovering) {
&& !recovering) {
// Only write the region open event marker to WAL if (1) we are not read-only
// (2) dist log replay is off or we are not recovering. In case region is
// recovering, the open event will be written at setRecovering(false)

4
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/HStore.java
View File

@ -1758,8 +1758,8 @@ public class HStore implements Store {
* @return true if the cell is expired
*/
static boolean isCellTTLExpired(final Cell cell, final long oldestTimestamp, final long now) {
// Do not create an Iterator or Tag objects unless the cell actually has
// tags
// Do not create an Iterator or Tag objects unless the cell actually has tags.
// TODO: This check for tags is really expensive. We decode an int for key and value. Costs.
if (cell.getTagsLength() > 0) {
// Look for a TTL tag first. Use it instead of the family setting if
// found. If a cell has multiple TTLs, resolve the conflict by using the

5
hbase-server/src/main/java/org/apache/hadoop/hbase/regionserver/RSRpcServices.java
View File

@ -2226,7 +2226,10 @@ public class RSRpcServices implements HBaseRPCErrorHandler,
if (maxResultSize <= 0) {
maxResultSize = maxQuotaResultSize;
}
List<Cell> values = new ArrayList<Cell>();
// This is cells inside a row. Default size is 10 so if many versions or many cfs,
// then we'll resize. Resizings show in profiler. Set it higher than 10. For now
// arbitrary 32. TODO: keep record of general size of results being returned.
List<Cell> values = new ArrayList<Cell>(32);
region.startRegionOperation(Operation.SCAN);
try {
int i = 0;

2
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestTags.java
View File

@ -279,7 +279,7 @@ public class TestTags {
Put put = new Put(row);
byte[] value = Bytes.toBytes("value");
put.add(fam, qual, HConstants.LATEST_TIMESTAMP, value);
int bigTagLen = Short.MAX_VALUE + 5;
int bigTagLen = Short.MAX_VALUE - 5;
put.setAttribute("visibility", new byte[bigTagLen]);
table.put(put);
Put put1 = new Put(row1);