https://bugzilla.novell.com/show_bug.cgi?id=863382 https://bugzilla.novell.com/show_bug.cgi?id=863382#c0 Summary: Unreal Tournamet server spiking after update Classification: openSUSE Product: openSUSE 13.1 Version: Final Platform: x86-64 OS/Version: openSUSE 13.1 Status: NEW Severity: Normal Priority: P5 - None Component: Other AssignedTo: bnc-team-screening@forge.provo.novell.com ReportedBy: kristjan.ugrin@gmail.com QAContact: qa-bugs@suse.de Found By: --- Blocker: --- User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1700.107 Safari/537.36 I was running an Unreal Tournament (99) server flawlessly till a couple of days back - 8.1.2014, but as of today it started to behave weirdly. The symptoms are similar to the one when the game starts when the CPU has a low frequency and then it throttles in to the highest state. The ucc server is started as usual (nothing changed here) - I set CPU to performance governor and via tasket I set ut server affinity to 1 (see attached ucc.sh). The first thing I did is to boot into older kernel, but that didn't work. Next try was safe mode and that helped - server was working ok. It boiled down to this parameter: "processor.max_cstate=1" So if I boot the system with this parameter set to 1, UT works normally. 1. How to identify which updates were installed over a period of time (to see why this might start happening) 2. Is it possible the performance governor got broken, causing c state to fluctuate when they shouldn't? (ut server doesn't consume much cpu power on a core 2 duo) 3. In case if this is intended to work so as of now, is there a way to force c-states for a specific application? I run the server on a Lenovo T400 laptop connected via wifi on same lan as clients (1 at max when testing). I've ruled out bad connection by connecting it via wired eth (same results). I've attached lspci and ut server startup script. Please let me know how to further investigate this problem - I'm sorry but I don't know in which component this problem lies specifically. Reproducible: Always Steps to Reproduce: (In case anyone has UT server and a client) 1. set performance governor 2. start ut server 3. connect and observe "ping spike" alike effect -- Configure bugmail: https://bugzilla.novell.com/userprefs.cgi?tab=email ------- You are receiving this mail because: ------- You are on the CC list for the bug.