Choel, There are two types of locks in XMLBeans: - a global lock that is used only on operations involving two documents in different locales are used - a local lock, per locale, by default each new doc gets its locale, using options same locale can be used for more docs)
Even for read operations because it involves state, there is a need for a lock to be used. But for your case, which seems so performance oriented, if you know what you do, you can try using unsynchronized documents (use option when creating your doc), but you need to handle the synchronization separately. Cezar -----Original Message----- From: choel [mailto:ch...@gmx.de] Sent: Wednesday, May 26, 2010 12:29 PM To: user@xmlbeans.apache.org Subject: Bad performance using multiple threads Hi, to improve the performance I started parallelizing (simple fork and join) some tasks. After testing the correctness of the output I found the performance on the parallel tasks extremely bad. In my testcase it is actually 4 times slower as normal single threaded usage. I am using a standard dual core cpu running two threads parallel. Is there anything known on bad multithreading performance using xmlbeans? In my case there is a lot parallel reading on the same data. Readlocks are for my usage not neccessary. Thanks in advance for some help. Here is some performance data: 1 Thread on dual core: Creating graph with 2407 nodes, took: 375 ms Routing 3170 connections, took: 31610 ms 4 Threads on dual core: Creating graph with 601 nodes, took: 250 ms Creating graph with 601 nodes, took: 266 ms Creating graph with 604 nodes, took: 282 ms Creating graph with 601 nodes, took: 282 ms Routing 794 connections, took: 57172 ms Routing 792 connections, took: 59625 ms Routing 792 connections, took: 60469 ms Routing 792 connections, took: 60485 ms Bye Claus -- View this message in context: http://old.nabble.com/Bad-performance-using-multiple-threads-tp28683839p28683839.html Sent from the Xml Beans - User mailing list archive at Nabble.com. --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@xmlbeans.apache.org For additional commands, e-mail: user-h...@xmlbeans.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: user-unsubscr...@xmlbeans.apache.org For additional commands, e-mail: user-h...@xmlbeans.apache.org
