Public bug reported: Binary package hint: kernel-image-2.6.22-14-generic-di
Gigabit ethernet adapters use 400-500% more CPU in Gutsy compared to Feisty for the same load. To reproduce: 1. Find two computers with gigabit NICs (I've tested with e1000, rt8169, tg3, sky2, forcedeth) plugged in to a suitable gigabit switch or connect with a suitable cross over cable. 2. Boot Feisty LiveCD in both computers, enable universe, and "sudo apt-get install iperf" on both computers. Then run iperf -s on one and iperf -c on the other and observe CPU usage for iperf (in the 10-20% range). 3. Repeat same procedure with Gutsy LiveCD. Note CPU usage for iperf (90-100+%). This should go in the Gutsy caveats in a very visible place as I don't think very many people will want to upgrade their servers if they know this. Just a little searching revealed this possibly related discussion on the LKML: http://www.mail-archive.com/[EMAIL PROTECTED]/msg213242.html ** Affects: linux-source-2.6.22 (Ubuntu) Importance: Undecided Status: New -- network performance and cpu usage in gutsy vs feisty https://bugs.launchpad.net/bugs/152741 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
