/**
Copyright (C) SYSTAP, LLC DBA Blazegraph 2006-2016. All rights reserved.
Contact:
SYSTAP, LLC DBA Blazegraph
2501 Calvert ST NW #106
Washington, DC 20008
licenses@blazegraph.com
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
package com.bigdata.rdf.sparql.ast.eval;
import java.lang.management.ManagementFactory;
import java.lang.management.ThreadMXBean;
import junit.framework.TestCase;
import com.bigdata.rdf.sparql.ast.ASTContainer;
public class TestBlockingBufferPerformance740 extends AbstractDataDrivenSPARQLTestCase {
public TestBlockingBufferPerformance740() {
}
public TestBlockingBufferPerformance740(String name) {
super(name);
}
/**
* This test measures the percent utilization by comparing CPU time
* with wall clock time. The test fails if this is less than 80%.
* Obviously, the expected value is greater for machines with more CPUs, the
* test does not take this into account.
* @throws Exception
*/
public void test_ticket_740() throws Exception {
new TestHelper("blocking-buffer-740",// testURI,
"blocking-buffer-740.rq",// queryFileURL
"blocking-buffer-740.rdf",// dataFileURL
"blocking-buffer-740.srx"// resultFileURL
){
@Override
public ASTContainer runTest() throws Exception {
ThreadMXBean mgmt = ManagementFactory.getThreadMXBean();
// mgmt.getThreadCPUTime() ;
long startCpuTime = currentTotalCpuTime(mgmt);
long startWallClock = System.currentTimeMillis();
try {
return super.runTest();
}
finally {
long cpuTime = currentTotalCpuTime(mgmt) - startCpuTime;
long clockTime = System.currentTimeMillis() - startWallClock;
cpuTime /= 1000000;
double utilization = cpuTime * 1.0 / clockTime;
TestCase.assertTrue("Performance was poor: "+(int)(utilization*100)+"% [< 80%]",utilization>0.8);
System.out.println("BlockingBuffer: performance was good: "+(int)(utilization*100)+"%");
}
}
/**
* This is a pretty optimistic implementation ...
* it does not deal with threads dying.
* It seems to suffice for this test though.
* @param mgmt
* @return
*/
private long currentTotalCpuTime(ThreadMXBean mgmt) {
long rslt = 0;
for (long tid:mgmt.getAllThreadIds()) {
long t = mgmt.getThreadCpuTime(tid);
if (t != -1)
rslt += t;
}
return rslt;
}
}.runTest();
}
}