This is clearly a regression as Drools should be not be using busy waits in fireUntilHalt(). It should use monitors and locks as it was doing before.
Can anyone open a JIRA? also, if anyone would be willing to take investigate and fix this one, it would really help. Otherwise, I will add it to my queue. Thanks, Edson 2010/10/25 Norman C <[email protected]>: > > > Note that the 100% CPU issue with fireUntiHalt is only with the 5.1 version of > Drools. In 5.0.x, CPU is close to 0% when there are no rules to fire. I saw > this when I was testing upgrading to 5.1. > > Norman > > > > ----- Original Message ---- > From: jschmied <[email protected]> > To: [email protected] > Sent: Sun, October 24, 2010 4:06:02 AM > Subject: Re: [rules-users] Starting engine using fireUntilHalt and inserting > no > facts results in 50% CPU usage > > > Hi! > > fireUntilHalt uses one processor with 100%. You have a dualcore, so it's > 50%. It's by design like this. > > You can: > - Call fireAllRules after every insert if you have no ruleflow. > > - Use fireAllRules in a loop with a small sleep and check for the end of the > ruleflow in the loop: > > while (prc.getState() == ProcessInstance.STATE_ACTIVE) { > Threads.sleep(20); > ksession.fireAllRules(); > } > > with both methods you get a low cpu load. > > bye > > juergen > -- > View this message in context: > http://drools-java-rules-engine.46999.n3.nabble.com/Starting-engine-using-fireUntilHalt-and-inserting-no-facts-results-in-50-CPU-usage-tp1760370p1761821.html > > Sent from the Drools - User mailing list archive at Nabble.com. > _______________________________________________ > rules-users mailing list > [email protected] > https://lists.jboss.org/mailman/listinfo/rules-users > > > > > > _______________________________________________ > rules-users mailing list > [email protected] > https://lists.jboss.org/mailman/listinfo/rules-users > -- Edson Tirelli JBoss Drools Core Development JBoss by Red Hat @ www.jboss.com _______________________________________________ rules-users mailing list [email protected] https://lists.jboss.org/mailman/listinfo/rules-users
