On Tue, May 3, 2022 at 6:24 AM Cay Horstmann <cay.horstm...@gmail.com> wrote: > > Hi, I am trying to experiment with Loom > (https://openjdk.java.net/jeps/425) virtual threads in Tomcat 10. There > is a nice extension point in server.xml where I can provide an Executor > and use it in the default Connector. It works like a charm--all my > requests run on a virtual thread, and AFAIK, nothing else does. > > There is just one issue. It takes forever for Tomcat to execute the > virtual threads. I made a timestamp for each invocation of > > public void execute(Runnable command) > > called from org.apache.tomcat.util.net.AbstractEndpoint.processSocket > > When I fire 1000 simultaneous requests, I can see that method being > invoked 1000 times, but it takes a while to work through the requests. > The last invocation occurs two minutes (!) from the sending of the requests. > > When using the org.apache.catalina.core.StandardThreadExecutor, that > many requests are handled in 3 seconds. > > Is there something that I am overlooking? I had hoped that execute would > be called near-instantly 1000 times, and then the Loom virtual threads > could show their mettle and execute concurrently.
I wanted to experiment with Loom, but most likely the current Tomcat NIO(2) connector is not nice for that. I was thinking that resurrecting the java.io code (actually: writing a new java.io connector) could be a slightly better plan, but to be honest I don't expect very good results. I wasn't planning to do it immediately since Loom is so experimental right now. Rémy > Thanks, > > Cay > > -- > > Cay S. Horstmann | http://horstmann.com | mailto:c...@horstmann.com > > --------------------------------------------------------------------- > To unsubscribe, e-mail: dev-unsubscr...@tomcat.apache.org > For additional commands, e-mail: dev-h...@tomcat.apache.org > --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@tomcat.apache.org For additional commands, e-mail: dev-h...@tomcat.apache.org
