Max Kington <[EMAIL PROTECTED]> writes: > Does anyone know the structure of the IO stacks on blackdown on Java > HotSpot(TM) 64-Bit Server VM (build Blackdown-1.4.2-01, mixed mode) > running on Redhat ES4 (AMD_64)? > > I'm testing a high throughput application and occasionally the > transaction journal seems to get out of sync, and I'm wondering if > something is happening asynchronously and it's screwing my ordering > up. Also, I had heard of some VM vendors re-building their bio > stacks on top of their nio stacks,
At least in Sun's and Blackdown's VMs, blocking IO is really blocking. > has anyone used nio on Blackdown and what results have you received? I would be interested in such reports too. It works well and the poll based selector scales like expected in my tests. The Blackdown VM also has an epoll based selector (-Djava.nio.use_epoll=true) which scales even better than poll based implementation. Juergen -- Juergen Kreileder, Blackdown Java-Linux Team http://blog.blackdown.de/ ---------------------------------------------------------------------- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]