Public bug reported: Note: This bug report may be misplaced because I'm not sure to which package/program to attribute the oversight/problem. Is it a kernel package I'm perhaps missing? Nothing immediately jumped out at me while perusing the kernel packages via Adept.
Setup: Dell Vostro 1500, Core 2 Duo Installed Hardy alpha 6, KDE4 To save someone 5 minutes of head scratching, I'll repeat: that's KDE4, not KDE3. However, looking through the /etc/init.d/kdm script, I see references to kde3, so not sure ... Background: I have a Core 2 Duo at 2.2 GHz, with plenty of RAM. That means effectively 2 CPUs or cores. While researching/preparing https://bugs.launchpad.net/ubuntu/+source/kdebase-workspace/+bug/204136 , my kdm binary started hogging a core. This still left a free available core. However, things noticeably slowed down. For instance, typing the previous bug report in Konqueror was slow. On a single core system I'd expect this, but on a dual-core system, with one core not being utilized, I would expect to not immediately notice a hogging process like that. Symptom: KDE4 responsiveness gets noticeably slower when a process (in this case, kdm) hogs a core, despite the fact that a second core is barely being used. Steps to reproduce: 0. Use a multi-core processor. In this case, Intel based. 1. Login to a KDE4 session. 2. Get a process to go hog-wild and take 100% of a core. (In this case, kdm, but I'm sure a busy wait loop will do the trick.) 3. Use the system. Actual behavior: General system slow down, becomes slow to respond to my inputs and to draw the screen. Expected behavior: Hog-wild broken behavior of kdm aside, I expect to notice a slow down if there's an unused core. Programs ought to use the unused core. ** Affects: kdebase (Ubuntu) Importance: Undecided Status: New -- kde4 doesn't utilize mutiple available CPU cores https://bugs.launchpad.net/bugs/204144 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
