Hello, our product "MIMIC Simulator" has been running on Fedora for a long time (eg. see http://www.gambitcomm.com/site/support/support_platforms.shtml ). But, we have seen a steady decline in performance over successive versions of Fedora (eg. see http://gambitcomm.blogspot.com/2010/06/mimic-1030-performance-test-report-high.html Our application is somewhat unique in that it can create many (10s of thousands) IP aliases, opens sockets to multiple ports on each. Only with Fedora 13 (kernel version 2.6.33.6-147.fc13.x86_64) have we seen a surprising performance improvement, where running 20,000 simulated agents is the same as running 10, in terms of networking performance. At first we could not believe it, but subsequent tests have confirmed that we indeed are seeing the improved performance. The specific improvement seems to be that the kernel seems to be efficiently demultiplexing among all open sockets to deliver received messages from the network card. Can some expert point me at a specific fix (spec, kernel module, source code revision) that could account for this? It would be in the networking code, possibly the socket demultiplexer. I have looked for this for a while and just cannot find it. This change would be after Fedora 12. Any hint would be appreciated. Thank you in advance. Uwe Zimmermann Gambit Communications -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines
