Author: steve.ebersole(a)jboss.com Date: 2007-09-21 12:26:29 -0400 (Fri, 21 Sep 2007) New Revision: 14019 Modified: sandbox/trunk/jdbc-proxy/src/test/perf/org/hibernate/jdbc/PerformanceTest.java Log: more robust forced gc to better isolate runs Modified: sandbox/trunk/jdbc-proxy/src/test/perf/org/hibernate/jdbc/PerformanceTest.java =================================================================== --- sandbox/trunk/jdbc-proxy/src/test/perf/org/hibernate/jdbc/PerformanceTest.java 2007-09-21 16:24:13 UTC (rev 14018) +++ sandbox/trunk/jdbc-proxy/src/test/perf/org/hibernate/jdbc/PerformanceTest.java 2007-09-21 16:26:29 UTC (rev 14019) @@ -15,6 +15,7 @@ */ package org.hibernate.jdbc; +import java.lang.ref.WeakReference; import java.sql.Connection; import java.sql.PreparedStatement; import java.sql.ResultSet; @@ -126,11 +127,8 @@ } } - System.gc(); - System.gc(); + // prime ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~p~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - // prime ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ - for ( int a = 0, Z = datums.length; a < Z; a++ ) { process( datums[a], 1 ); } @@ -157,6 +155,15 @@ System.out.println( "-----------------------------------------------------------------------------------" ); } + private void doGC() throws Throwable { + WeakReference dumb = new WeakReference( new Object() ); + System.gc(); + System.gc(); + while ( dumb.get() != null) { + Thread.sleep( 500 ); + } + } + private ProcessResult average(ProcessResult[][] results, int extrapolation) { long jdbcAvg = 0, proxyAvg = 0, delegAvg = 0; // the first dimension is the object counts... @@ -205,6 +212,8 @@ LogicalConnectionImpl lc; long start; + doGC(); + start = System.currentTimeMillis(); c = services.getConnectionProvider().getConnection(); for ( int i = 0; i < statementCount; i++ ) { @@ -213,6 +222,8 @@ services.getConnectionProvider().closeConnection( c ); long jdbc = System.currentTimeMillis() - start; + doGC(); + start = System.currentTimeMillis(); lc = new LogicalConnectionImpl( null, ConnectionReleaseMode.AFTER_TRANSACTION, services ); c = ProxyBuilder.buildConnection( lc ); @@ -223,6 +234,8 @@ lc.close(); long proxy = System.currentTimeMillis() - start; + doGC(); + start = System.currentTimeMillis(); lc = new LogicalConnectionImpl( null, ConnectionReleaseMode.AFTER_TRANSACTION, services ); c = new ConnectionDelegate( lc );