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[coLinux-devel] [ colinux-Bugs-1824299 ] coLinux latest snapshot CPU under-utilization
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From: SourceForge.net <no...@so...> - 2007-11-02 20:09:36
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Bugs item #1824299, was opened at 2007-11-01 22:00 Message generated for change (Comment added) made by henryn You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=622063&aid=1824299&group_id=98788 Please note that this message will contain a full copy of the comment thread, including the initial issue submission, for this request, not just the latest update. Category: None Group: None Status: Open Resolution: None Priority: 5 Private: No Submitted By: Ryan Underwood (runderwo) Assigned to: Nobody/Anonymous (nobody) Summary: coLinux latest snapshot CPU under-utilization Initial Comment: I have installed the latest coLinux snapshot to upgrade my 0.6.4 installation. Everything went fine, but the coLinux system is quite slow while Windows remains fast. There is no load on the Windows side, and only one running process on the coLinux side, which reads only up to 25% CPU utilization. It's almost as if some throttling is taking place. Unfortunately this slowdown renders a coLinux GUI unusable... even though the system is hardly loaded at all. ---------------------------------------------------------------------- >Comment By: Henry N. (henryn) Date: 2007-11-02 21:09 Message: Logged In: YES user_id=579204 Originator: NO Ok, have tested the same. Shure the scolling is not fast. But I never see it better. You should use the NT console, this is more faster. Or, the best: You use Putty and a SSH login. In the idle case my FLTK console has 980 CSwitch Delta (unter Threads in Process Explorer), and goes upt to 1450 while "ls /dev" is printed. Interesting: If I stepping down my CPU clock from 1800 MHz to 1200 MHz, then the CSwitch goes down to 1100 wihle "ls /dev" is running. Here my times on FLTK console (GUI) with CPU clock 1800 MHz # ls /dev | wc 4832 4832 29049 # time ls /dev ... lots of devices scrolls ... real 0m12.753s user 0m8.410s sys 0m4.340s On NT console # time ls /dev ... all devices ... real 0m3.657s user 0m2.780s sys 0m0.880s The same under Putty in a 80x25 screen: # time ls /dev ... real 0m1.028s user 0m0.270s sys 0m0.050s ---------------------------------------------------------------------- Comment By: Ryan Underwood (runderwo) Date: 2007-11-02 20:09 Message: Logged In: YES user_id=324742 Originator: YES I/O usage is between zero and "medium" on the scale (seems like no more than 10MB on the left graph). Context switch rate is about 250 per second. An empty XML logfile is produced... no errors. dmesg |head -n1: Linux version 2.6.12-co-0.7.1 (hn@coLinux) (gcc version 3.4.5 (mingw special)) #1 Sat Jul 14 12:13:49 UTC 2007 ---------------------------------------------------------------------- Comment By: Ryan Underwood (runderwo) Date: 2007-11-02 19:21 Message: Logged In: YES user_id=324742 Originator: YES XDMCP login, but video is not the problem. Video drawing was fast before and still is. It's poorly performing even at console. There is no change from the previous stable installation where it ran fast. Unfortunately, I've overwritten my previous installation, so I don't know what the previous version was... WinXP SP2 host I'll post more details in a minute. ---------------------------------------------------------------------- Comment By: Nobody/Anonymous (nobody) Date: 2007-11-02 14:16 Message: Logged In: NO What method are you using for displaying the GUI? (colinux framebuffer, X over TCP/IP, X over ssh, NX, VNC, etc)? There's not yet any X.org driver written with DRI or shared memory support, since Windows controls the hardware it wouldn't be safe for linux to write directly into video RAM (although it should be possible to allocate some video RAM using DirectX for linux to use -- probably this will become feasible once some of the paravirtualization work is done on video drivers for xen, kvm, etc) ---------------------------------------------------------------------- Comment By: Henry N. (henryn) Date: 2007-11-02 12:54 Message: Logged In: YES user_id=579204 Originator: NO What version do you run? Please reffer the build date or the "dmesg|head -n1". What Host OS? (Win2000, WinXP, Vista) The utilization inside coLinux is not real. CoLinux runs slowly, if Windows dosn't give time to the process. Check the processes on windows side with ProcessExplorer (http://www.sysinternals.com, hosted on MS now). Does any coLinux process a highly context switch, or high I/O traffic? Run the colinux debugger and check for errors or messages: colinux-debug-daemon -d -p -f logfile.xml -s prints=31,misc=31 ---------------------------------------------------------------------- You can respond by visiting: https://sourceforge.net/tracker/?func=detail&atid=622063&aid=1824299&group_id=98788 |