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changeset 19443:ac5b08ea9a6a

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Make Truffle compilations multi-threaded on multi-core systems. Introduce TruffleCompilerThreads option for a manual override.
author Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
date Tue, 17 Feb 2015 01:43:24 +0100
parents a5c9756f9649
children d786fa19dc47
files graal/com.oracle.graal.truffle.hotspot/src/com/oracle/graal/truffle/hotspot/HotSpotTruffleRuntime.java graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/TruffleCompilerOptions.java
diffstat 2 files changed, 15 insertions(+), 1 deletions(-) [+]
line wrap: on
line diff
--- a/graal/com.oracle.graal.truffle.hotspot/src/com/oracle/graal/truffle/hotspot/HotSpotTruffleRuntime.java	Tue Feb 17 01:26:27 2015 +0100
+++ b/graal/com.oracle.graal.truffle.hotspot/src/com/oracle/graal/truffle/hotspot/HotSpotTruffleRuntime.java	Tue Feb 17 01:43:24 2015 +0100
@@ -98,7 +98,18 @@
                 }
             }
         });
-        compileQueue = new ThreadPoolExecutor(1, 1, 0L, TimeUnit.MILLISECONDS, new LinkedBlockingQueue<Runnable>(), factory);
+        int selectedProcessors = TruffleCompilerOptions.TruffleCompilerThreads.getValue();
+        if (selectedProcessors == 0) {
+            // No manual selection made, check how many processors are available.
+            int availableProcessors = Runtime.getRuntime().availableProcessors();
+            if (availableProcessors >= 4) {
+                selectedProcessors = 2;
+            } else if (availableProcessors >= 12) {
+                selectedProcessors = 4;
+            }
+        }
+        selectedProcessors = Math.max(1, selectedProcessors);
+        compileQueue = new ThreadPoolExecutor(2, 2, 0L, TimeUnit.MILLISECONDS, new LinkedBlockingQueue<Runnable>(), factory);
 
     }
 
--- a/graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/TruffleCompilerOptions.java	Tue Feb 17 01:26:27 2015 +0100
+++ b/graal/com.oracle.graal.truffle/src/com/oracle/graal/truffle/TruffleCompilerOptions.java	Tue Feb 17 01:43:24 2015 +0100
@@ -104,6 +104,9 @@
     @Option(help = "Enable asynchronous truffle compilation in background thread", type = OptionType.Expert)
     public static final OptionValue<Boolean> TruffleBackgroundCompilation = new OptionValue<>(true);
 
+    @Option(help = "Manually set the number of compiler threads", type = OptionType.Expert)
+    public static final StableOptionValue<Integer> TruffleCompilerThreads = new StableOptionValue<>(0);
+
     @Option(help = "Enable inlining across Truffle boundary", type = OptionType.Expert)
     public static final OptionValue<Boolean> TruffleInlineAcrossTruffleBoundary = new OptionValue<>(false);