On Tue, 6 Apr 2010 15:35:25 +1000 ronnie sahlberg <ronniesahlberg@xxxxxxxxx> wrote: > I dont think that is viable for Chandra. > > TGTD is pretty limited performance wise with its central eventloop. On > a many-core machine with a lot of memory > the central event loop quickly becomes a bottleneck. Can you have the performance analysis with tools such as perf? The most of network processing happens in kernel space. The I/O processing too. They are not related with the number of user processes. Yeah, tgtd would be a bottleneck but there are lots of other possible bottlenecks. > For these usecases you really want to run multiple instances of tgtd. > In particular if you have a high-end storage subsystem attached > that can deliver high enough throughput. > > Perhaps have one instance of TGTD for each 10GbE adapter. Perhaps one > instance of TGTD for every 2 cores. As I said yesterday, I think that we need to think about using multiple threads for targets (or initiators) if necessary. But we need the evidence first. -- To unsubscribe from this list: send the line "unsubscribe stgt" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
