http://git-wip-us.apache.org/repos/asf/hbase-site/blob/cef8af03/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/CompactionPipeline.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/CompactionPipeline.html b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/CompactionPipeline.html index a736734..0522a39 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/CompactionPipeline.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/CompactionPipeline.html @@ -51,10 +51,10 @@ <span class="sourceLineNo">043</span> * suffix of the pipeline.<a name="line.43"></a> <span class="sourceLineNo">044</span> *<a name="line.44"></a> <span class="sourceLineNo">045</span> * The synchronization model is copy-on-write. 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Segment#close()<a name="line.266"></a> +<span class="sourceLineNo">267</span> // will release the MSLAB chunks to pool. But in case of index merge there wont be any data copy<a name="line.267"></a> +<span class="sourceLineNo">268</span> // from old MSLABs. So the new cells in new segment also refers to same chunks. In case of data<a name="line.268"></a> +<span class="sourceLineNo">269</span> // compaction, we would have copied the cells data from old MSLAB chunks into a new chunk<a name="line.269"></a> +<span class="sourceLineNo">270</span> // created for the result segment. 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extends Segment> localCopy = getSegments();<a name="line.294"></a> +<span class="sourceLineNo">295</span> if(localCopy.isEmpty()) {<a name="line.295"></a> +<span class="sourceLineNo">296</span> return null;<a name="line.296"></a> +<span class="sourceLineNo">297</span> }<a name="line.297"></a> +<span class="sourceLineNo">298</span> return localCopy.get(localCopy.size() - 1);<a name="line.298"></a> +<span class="sourceLineNo">299</span> }<a name="line.299"></a> +<span class="sourceLineNo">300</span><a name="line.300"></a> +<span class="sourceLineNo">301</span> private boolean addFirst(ImmutableSegment segment) {<a name="line.301"></a> +<span class="sourceLineNo">302</span> pipeline.addFirst(segment);<a name="line.302"></a> +<span class="sourceLineNo">303</span> return true;<a name="line.303"></a> +<span class="sourceLineNo">304</span> }<a name="line.304"></a> +<span class="sourceLineNo">305</span><a name="line.305"></a> +<span class="sourceLineNo">306</span> // debug method<a name="line.306"></a> +<span class="sourceLineNo">307</span> private boolean validateSuffixList(LinkedList<ImmutableSegment> suffix) {<a name="line.307"></a> +<span class="sourceLineNo">308</span> if(suffix.isEmpty()) {<a name="line.308"></a> +<span class="sourceLineNo">309</span> // empty suffix is always valid<a name="line.309"></a> +<span class="sourceLineNo">310</span> return true;<a name="line.310"></a> +<span class="sourceLineNo">311</span> }<a name="line.311"></a> +<span class="sourceLineNo">312</span> Iterator<ImmutableSegment> pipelineBackwardIterator = pipeline.descendingIterator();<a name="line.312"></a> +<span class="sourceLineNo">313</span> Iterator<ImmutableSegment> suffixBackwardIterator = suffix.descendingIterator();<a name="line.313"></a> +<span class="sourceLineNo">314</span> ImmutableSegment suffixCurrent;<a name="line.314"></a> +<span class="sourceLineNo">315</span> ImmutableSegment pipelineCurrent;<a name="line.315"></a> +<span class="sourceLineNo">316</span> for( ; suffixBackwardIterator.hasNext(); ) {<a name="line.316"></a> +<span class="sourceLineNo">317</span> if(!pipelineBackwardIterator.hasNext()) {<a name="line.317"></a> +<span class="sourceLineNo">318</span> // a suffix longer than pipeline is invalid<a name="line.318"></a> +<span class="sourceLineNo">319</span> return false;<a name="line.319"></a> +<span class="sourceLineNo">320</span> }<a name="line.320"></a> +<span class="sourceLineNo">321</span> suffixCurrent = suffixBackwardIterator.next();<a name="line.321"></a> +<span class="sourceLineNo">322</span> pipelineCurrent = pipelineBackwardIterator.next();<a name="line.322"></a> +<span class="sourceLineNo">323</span> if(suffixCurrent != pipelineCurrent) {<a name="line.323"></a> +<span class="sourceLineNo">324</span> // non-matching suffix<a name="line.324"></a> +<span class="sourceLineNo">325</span> return false;<a name="line.325"></a> +<span class="sourceLineNo">326</span> }<a name="line.326"></a> +<span class="sourceLineNo">327</span> }<a name="line.327"></a> +<span class="sourceLineNo">328</span> // suffix matches pipeline suffix<a name="line.328"></a> +<span class="sourceLineNo">329</span> return true;<a name="line.329"></a> +<span class="sourceLineNo">330</span> }<a name="line.330"></a> +<span class="sourceLineNo">331</span><a name="line.331"></a> +<span class="sourceLineNo">332</span>}<a name="line.332"></a>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/cef8af03/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.CompactionChecker.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.CompactionChecker.html b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.CompactionChecker.html index 61c9b54..a7697c0 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.CompactionChecker.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.CompactionChecker.html @@ -650,7 +650,7 @@ <span class="sourceLineNo">642</span> if (!conf.getBoolean("hbase.testing.nocluster", false)) {<a name="line.642"></a> <span class="sourceLineNo">643</span> // Open connection to zookeeper and set primary watcher<a name="line.643"></a> <span class="sourceLineNo">644</span> zooKeeper = new ZooKeeperWatcher(conf, getProcessName() + ":" +<a name="line.644"></a> -<span class="sourceLineNo">645</span> rpcServices.isa.getPort(), this, canCreateBaseZNode());<a name="line.645"></a> +<span class="sourceLineNo">645</span> rpcServices.isa.getPort(), this, canCreateBaseZNode(), true);<a name="line.645"></a> <span class="sourceLineNo">646</span><a name="line.646"></a> <span class="sourceLineNo">647</span> this.csm = (BaseCoordinatedStateManager) csm;<a name="line.647"></a> <span class="sourceLineNo">648</span> this.csm.initialize(this);<a name="line.648"></a> http://git-wip-us.apache.org/repos/asf/hbase-site/blob/cef8af03/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.MovedRegionInfo.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.MovedRegionInfo.html b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.MovedRegionInfo.html index 61c9b54..a7697c0 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.MovedRegionInfo.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.MovedRegionInfo.html @@ -650,7 +650,7 @@ <span class="sourceLineNo">642</span> if (!conf.getBoolean("hbase.testing.nocluster", false)) {<a name="line.642"></a> <span class="sourceLineNo">643</span> // Open connection to zookeeper and set primary watcher<a name="line.643"></a> <span class="sourceLineNo">644</span> zooKeeper = new ZooKeeperWatcher(conf, getProcessName() + ":" +<a name="line.644"></a> -<span class="sourceLineNo">645</span> rpcServices.isa.getPort(), this, canCreateBaseZNode());<a name="line.645"></a> +<span class="sourceLineNo">645</span> rpcServices.isa.getPort(), this, canCreateBaseZNode(), true);<a name="line.645"></a> <span class="sourceLineNo">646</span><a name="line.646"></a> <span class="sourceLineNo">647</span> this.csm = (BaseCoordinatedStateManager) csm;<a name="line.647"></a> <span class="sourceLineNo">648</span> this.csm.initialize(this);<a name="line.648"></a> http://git-wip-us.apache.org/repos/asf/hbase-site/blob/cef8af03/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.MovedRegionsCleaner.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.MovedRegionsCleaner.html b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.MovedRegionsCleaner.html index 61c9b54..a7697c0 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.MovedRegionsCleaner.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.MovedRegionsCleaner.html @@ -650,7 +650,7 @@ <span class="sourceLineNo">642</span> if (!conf.getBoolean("hbase.testing.nocluster", false)) {<a name="line.642"></a> <span class="sourceLineNo">643</span> // Open connection to zookeeper and set primary watcher<a name="line.643"></a> <span class="sourceLineNo">644</span> zooKeeper = new ZooKeeperWatcher(conf, getProcessName() + ":" +<a name="line.644"></a> -<span class="sourceLineNo">645</span> rpcServices.isa.getPort(), this, canCreateBaseZNode());<a name="line.645"></a> +<span class="sourceLineNo">645</span> rpcServices.isa.getPort(), this, canCreateBaseZNode(), true);<a name="line.645"></a> <span class="sourceLineNo">646</span><a name="line.646"></a> <span class="sourceLineNo">647</span> this.csm = (BaseCoordinatedStateManager) csm;<a name="line.647"></a> <span class="sourceLineNo">648</span> this.csm.initialize(this);<a name="line.648"></a> http://git-wip-us.apache.org/repos/asf/hbase-site/blob/cef8af03/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.PeriodicMemstoreFlusher.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.PeriodicMemstoreFlusher.html b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.PeriodicMemstoreFlusher.html index 61c9b54..a7697c0 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.PeriodicMemstoreFlusher.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.PeriodicMemstoreFlusher.html @@ -650,7 +650,7 @@ <span class="sourceLineNo">642</span> if (!conf.getBoolean("hbase.testing.nocluster", false)) {<a name="line.642"></a> <span class="sourceLineNo">643</span> // Open connection to zookeeper and set primary watcher<a name="line.643"></a> <span class="sourceLineNo">644</span> zooKeeper = new ZooKeeperWatcher(conf, getProcessName() + ":" +<a name="line.644"></a> -<span class="sourceLineNo">645</span> rpcServices.isa.getPort(), this, canCreateBaseZNode());<a name="line.645"></a> +<span class="sourceLineNo">645</span> rpcServices.isa.getPort(), this, canCreateBaseZNode(), true);<a name="line.645"></a> <span class="sourceLineNo">646</span><a name="line.646"></a> <span class="sourceLineNo">647</span> this.csm = (BaseCoordinatedStateManager) csm;<a name="line.647"></a> <span class="sourceLineNo">648</span> this.csm.initialize(this);<a name="line.648"></a> http://git-wip-us.apache.org/repos/asf/hbase-site/blob/cef8af03/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.html b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.html index 61c9b54..a7697c0 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/HRegionServer.html @@ -650,7 +650,7 @@ <span class="sourceLineNo">642</span> if (!conf.getBoolean("hbase.testing.nocluster", false)) {<a name="line.642"></a> <span class="sourceLineNo">643</span> // Open connection to zookeeper and set primary watcher<a name="line.643"></a> <span class="sourceLineNo">644</span> zooKeeper = new ZooKeeperWatcher(conf, getProcessName() + ":" +<a name="line.644"></a> -<span class="sourceLineNo">645</span> rpcServices.isa.getPort(), this, canCreateBaseZNode());<a name="line.645"></a> +<span class="sourceLineNo">645</span> rpcServices.isa.getPort(), this, canCreateBaseZNode(), true);<a name="line.645"></a> <span class="sourceLineNo">646</span><a name="line.646"></a> <span class="sourceLineNo">647</span> this.csm = (BaseCoordinatedStateManager) csm;<a name="line.647"></a> <span class="sourceLineNo">648</span> this.csm.initialize(this);<a name="line.648"></a> http://git-wip-us.apache.org/repos/asf/hbase-site/blob/cef8af03/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/MemStoreLABImpl.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/MemStoreLABImpl.html b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/MemStoreLABImpl.html index f19fbda..a1f9481 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/MemStoreLABImpl.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/regionserver/MemStoreLABImpl.html @@ -86,209 +86,226 @@ <span class="sourceLineNo">078</span> private final int chunkSize;<a name="line.78"></a> <span class="sourceLineNo">079</span> private final int maxAlloc;<a name="line.79"></a> <span class="sourceLineNo">080</span> private final ChunkCreator chunkCreator;<a name="line.80"></a> -<span class="sourceLineNo">081</span><a name="line.81"></a> -<span class="sourceLineNo">082</span> // This flag is for closing this instance, its set when clearing snapshot of<a name="line.82"></a> -<span class="sourceLineNo">083</span> // memstore<a name="line.83"></a> -<span class="sourceLineNo">084</span> private volatile boolean closed = false;<a name="line.84"></a> -<span class="sourceLineNo">085</span> // This flag is for reclaiming chunks. Its set when putting chunks back to<a name="line.85"></a> -<span class="sourceLineNo">086</span> // pool<a name="line.86"></a> -<span class="sourceLineNo">087</span> private AtomicBoolean reclaimed = new AtomicBoolean(false);<a name="line.87"></a> -<span class="sourceLineNo">088</span> // Current count of open scanners which reading data from this MemStoreLAB<a name="line.88"></a> -<span class="sourceLineNo">089</span> private final AtomicInteger openScannerCount = new AtomicInteger();<a name="line.89"></a> -<span class="sourceLineNo">090</span><a name="line.90"></a> -<span class="sourceLineNo">091</span> // Used in testing<a name="line.91"></a> -<span class="sourceLineNo">092</span> public MemStoreLABImpl() {<a name="line.92"></a> -<span class="sourceLineNo">093</span> this(new Configuration());<a name="line.93"></a> -<span class="sourceLineNo">094</span> }<a name="line.94"></a> -<span class="sourceLineNo">095</span><a name="line.95"></a> -<span class="sourceLineNo">096</span> public MemStoreLABImpl(Configuration conf) {<a name="line.96"></a> -<span class="sourceLineNo">097</span> chunkSize = conf.getInt(CHUNK_SIZE_KEY, CHUNK_SIZE_DEFAULT);<a name="line.97"></a> -<span class="sourceLineNo">098</span> maxAlloc = conf.getInt(MAX_ALLOC_KEY, MAX_ALLOC_DEFAULT);<a name="line.98"></a> -<span class="sourceLineNo">099</span> this.chunkCreator = ChunkCreator.getInstance();<a name="line.99"></a> -<span class="sourceLineNo">100</span> // if we don't exclude allocations >CHUNK_SIZE, we'd infiniteloop on one!<a name="line.100"></a> -<span class="sourceLineNo">101</span> Preconditions.checkArgument(maxAlloc <= chunkSize,<a name="line.101"></a> -<span class="sourceLineNo">102</span> MAX_ALLOC_KEY + " must be less than " + CHUNK_SIZE_KEY);<a name="line.102"></a> -<span class="sourceLineNo">103</span> }<a name="line.103"></a> -<span class="sourceLineNo">104</span><a name="line.104"></a> -<span class="sourceLineNo">105</span> @Override<a name="line.105"></a> -<span class="sourceLineNo">106</span> public Cell copyCellInto(Cell cell) {<a name="line.106"></a> -<span class="sourceLineNo">107</span> int size = KeyValueUtil.length(cell);<a name="line.107"></a> -<span class="sourceLineNo">108</span> Preconditions.checkArgument(size >= 0, "negative size");<a name="line.108"></a> -<span class="sourceLineNo">109</span> // Callers should satisfy large allocations directly from JVM since they<a name="line.109"></a> -<span class="sourceLineNo">110</span> // don't cause fragmentation as badly.<a name="line.110"></a> -<span class="sourceLineNo">111</span> if (size > maxAlloc) {<a name="line.111"></a> -<span class="sourceLineNo">112</span> return null;<a name="line.112"></a> -<span class="sourceLineNo">113</span> }<a name="line.113"></a> -<span class="sourceLineNo">114</span> Chunk c = null;<a name="line.114"></a> -<span class="sourceLineNo">115</span> int allocOffset = 0;<a name="line.115"></a> -<span class="sourceLineNo">116</span> while (true) {<a name="line.116"></a> -<span class="sourceLineNo">117</span> // Try to get the chunk<a name="line.117"></a> -<span class="sourceLineNo">118</span> c = getOrMakeChunk();<a name="line.118"></a> -<span class="sourceLineNo">119</span> // we may get null because the some other thread succeeded in getting the lock<a name="line.119"></a> -<span class="sourceLineNo">120</span> // and so the current thread has to try again to make its chunk or grab the chunk<a name="line.120"></a> -<span class="sourceLineNo">121</span> // that the other thread created<a name="line.121"></a> -<span class="sourceLineNo">122</span> // Try to allocate from this chunk<a name="line.122"></a> -<span class="sourceLineNo">123</span> if (c != null) {<a name="line.123"></a> -<span class="sourceLineNo">124</span> allocOffset = c.alloc(size);<a name="line.124"></a> -<span class="sourceLineNo">125</span> if (allocOffset != -1) {<a name="line.125"></a> -<span class="sourceLineNo">126</span> // We succeeded - 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The Memstore addition of every Cell<a name="line.161"></a> +<span class="sourceLineNo">162</span> // call getTagsLength().<a name="line.162"></a> +<span class="sourceLineNo">163</span> return new NoTagByteBufferChunkCell(buf, offset, len, cell.getSequenceId());<a name="line.163"></a> +<span class="sourceLineNo">164</span> } else {<a name="line.164"></a> +<span class="sourceLineNo">165</span> return new ByteBufferChunkCell(buf, offset, len, cell.getSequenceId());<a name="line.165"></a> +<span class="sourceLineNo">166</span> }<a name="line.166"></a> +<span class="sourceLineNo">167</span> }<a name="line.167"></a> +<span class="sourceLineNo">168</span><a name="line.168"></a> +<span class="sourceLineNo">169</span> /**<a name="line.169"></a> +<span class="sourceLineNo">170</span> * Close this instance since it won't be used any more, try to put the chunks<a name="line.170"></a> +<span class="sourceLineNo">171</span> * back to pool<a name="line.171"></a> +<span class="sourceLineNo">172</span> */<a name="line.172"></a> +<span class="sourceLineNo">173</span> @Override<a name="line.173"></a> +<span class="sourceLineNo">174</span> public void close() {<a name="line.174"></a> +<span class="sourceLineNo">175</span> this.closed = true;<a name="line.175"></a> +<span class="sourceLineNo">176</span> // We could put back the chunks to pool for reusing only when there is no<a name="line.176"></a> +<span class="sourceLineNo">177</span> // opening scanner which will read their data<a name="line.177"></a> +<span class="sourceLineNo">178</span> int count = openScannerCount.get();<a name="line.178"></a> +<span class="sourceLineNo">179</span> if(count == 0) {<a name="line.179"></a> +<span class="sourceLineNo">180</span> recycleChunks();<a name="line.180"></a> +<span class="sourceLineNo">181</span> }<a name="line.181"></a> +<span class="sourceLineNo">182</span> }<a name="line.182"></a> +<span class="sourceLineNo">183</span><a name="line.183"></a> +<span class="sourceLineNo">184</span> /**<a name="line.184"></a> +<span class="sourceLineNo">185</span> * Called when opening a scanner on the data of this MemStoreLAB<a name="line.185"></a> +<span class="sourceLineNo">186</span> */<a name="line.186"></a> +<span class="sourceLineNo">187</span> @Override<a name="line.187"></a> +<span class="sourceLineNo">188</span> public void incScannerCount() {<a name="line.188"></a> +<span class="sourceLineNo">189</span> this.openScannerCount.incrementAndGet();<a name="line.189"></a> +<span class="sourceLineNo">190</span> }<a name="line.190"></a> +<span class="sourceLineNo">191</span><a name="line.191"></a> +<span class="sourceLineNo">192</span> /**<a name="line.192"></a> +<span class="sourceLineNo">193</span> * Called when closing a scanner on the data of this MemStoreLAB<a name="line.193"></a> +<span class="sourceLineNo">194</span> */<a name="line.194"></a> +<span class="sourceLineNo">195</span> @Override<a name="line.195"></a> +<span class="sourceLineNo">196</span> public void decScannerCount() {<a name="line.196"></a> +<span class="sourceLineNo">197</span> int count = this.openScannerCount.decrementAndGet();<a name="line.197"></a> +<span class="sourceLineNo">198</span> if (this.closed && count == 0) {<a name="line.198"></a> +<span class="sourceLineNo">199</span> recycleChunks();<a name="line.199"></a> +<span class="sourceLineNo">200</span> }<a name="line.200"></a> +<span class="sourceLineNo">201</span> }<a name="line.201"></a> +<span class="sourceLineNo">202</span><a name="line.202"></a> +<span class="sourceLineNo">203</span> private void recycleChunks() {<a name="line.203"></a> +<span class="sourceLineNo">204</span> if (reclaimed.compareAndSet(false, true)) {<a name="line.204"></a> +<span class="sourceLineNo">205</span> chunkCreator.putbackChunks(chunks);<a name="line.205"></a> +<span class="sourceLineNo">206</span> }<a name="line.206"></a> +<span class="sourceLineNo">207</span> }<a name="line.207"></a> +<span class="sourceLineNo">208</span><a name="line.208"></a> +<span class="sourceLineNo">209</span> /**<a name="line.209"></a> +<span class="sourceLineNo">210</span> * Try to retire the current chunk if it is still<a name="line.210"></a> +<span class="sourceLineNo">211</span> * <code>c</code>. Postcondition is that curChunk.get()<a name="line.211"></a> +<span class="sourceLineNo">212</span> * != c<a name="line.212"></a> +<span class="sourceLineNo">213</span> * @param c the chunk to retire<a name="line.213"></a> +<span class="sourceLineNo">214</span> * @return true if we won the race to retire the chunk<a name="line.214"></a> +<span class="sourceLineNo">215</span> */<a name="line.215"></a> +<span class="sourceLineNo">216</span> private void tryRetireChunk(Chunk c) {<a name="line.216"></a> +<span class="sourceLineNo">217</span> curChunk.compareAndSet(c, null);<a name="line.217"></a> +<span class="sourceLineNo">218</span> // If the CAS succeeds, that means that we won the race<a name="line.218"></a> +<span class="sourceLineNo">219</span> // to retire the chunk. We could use this opportunity to<a name="line.219"></a> +<span class="sourceLineNo">220</span> // update metrics on external fragmentation.<a name="line.220"></a> +<span class="sourceLineNo">221</span> //<a name="line.221"></a> +<span class="sourceLineNo">222</span> // If the CAS fails, that means that someone else already<a name="line.222"></a> +<span class="sourceLineNo">223</span> // retired the chunk for us.<a name="line.223"></a> +<span class="sourceLineNo">224</span> }<a name="line.224"></a> +<span class="sourceLineNo">225</span><a name="line.225"></a> +<span class="sourceLineNo">226</span> /**<a name="line.226"></a> +<span class="sourceLineNo">227</span> * Get the current chunk, or, if there is no current chunk,<a name="line.227"></a> +<span class="sourceLineNo">228</span> * allocate a new one from the JVM.<a name="line.228"></a> +<span class="sourceLineNo">229</span> */<a name="line.229"></a> +<span class="sourceLineNo">230</span> private Chunk getOrMakeChunk() {<a name="line.230"></a> +<span class="sourceLineNo">231</span> // Try to get the chunk<a name="line.231"></a> +<span class="sourceLineNo">232</span> Chunk c = curChunk.get();<a name="line.232"></a> +<span class="sourceLineNo">233</span> if (c != null) {<a name="line.233"></a> +<span class="sourceLineNo">234</span> return c;<a name="line.234"></a> +<span class="sourceLineNo">235</span> }<a name="line.235"></a> +<span class="sourceLineNo">236</span> // No current chunk, so we want to allocate one. 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