Hi Chris. Do you have what you need for looking into this bug?
Best regards Peter Maersk-Moller On Sat, Aug 23, 2014 at 3:51 PM, Chris Wilson <ch...@chris-wilson.co.uk> wrote: > Can you get a function profile to show which code paths are being > utilized in the two cairo versions, and perhaps a cairo-trace? > > -- > You received this bug notification because you are subscribed to the bug > report. > https://bugs.launchpad.net/bugs/1360606 > > Title: > libcairo.so for Ubuntu 14.04 is dead-slow compared to Ubuntu 13.10 > > Status in “cairo” package in Ubuntu: > New > > Bug description: > I'm running the video mixer software called Snowmix that uses libcairo > extensively. After updating to Ubuntu 14.04 Desktop amd64, I noticed > that mixing video required 8 times more CPU compared to Ubuntu 13.10. > Using oprofile I discovered the heavy CPU load was taking place in > libpixman used by libcairo. However libpixman is currently the same > release in Ubuntu 14.04 and 13.10. However I did notice that libcairo > got upgraded from libcairo.so.2.11200.16 in Ubuntu 13.10 to > libcairo.so.2.11301.0 in Uuntu 14.04. > > Snowmix uses libcairo2 primarily for scaling and rotating images and > overlay them in memory. > > Replacing libcairo.so.2.11301.0 with libcairo.so.2.11200.16 in Ubuntu > 14.04 lower the CPU usage by at least 8 times. So I suspect that > libcairo for Ubuntu 14.04 somehow got compiled without the hardware > acceleration such as MMX/SSE2/SSE3 etc. This is quite bad if this is > the case. If it is not the case, something else is seriously wrong > with libcairo2. > > 1)Description: Ubuntu 14.04.1 LTS > Release: 14.04 > 2) libcairo2: > Installed: 1.13.0~20140204-0ubuntu1 > Candidate: 1.13.0~20140204-0ubuntu1 > Version table: > *** 1.13.0~20140204-0ubuntu1 0 > 500 http://dk.archive.ubuntu.com/ubuntu/ trusty/main amd64 > Packages > 100 /var/lib/dpkg/status > 3) I expected libcairo2 (libcairo.so.2.11301.0) for Ubuntu14.04 to work > as efficient as libcairo2 (libcairo.so.2.11200.16)for Ubuntu13.10. > 4) Libcairo2 for Ubuntu 14.04 works 8 times slower indicating a lack of > MMX/SSE2/SSE3 etc acceleration. > > For the source, you have the source for libcairo2 for Ubuntu14.04. > > I can provide you with the source code for Snowmix using libcairo2, > but I don't expected you need it nor want it. > > Best regards > Peter Maersk-Moller > > ProblemType: Bug > DistroRelease: Ubuntu 14.04 > Package: libcairo2 1.13.0~20140204-0ubuntu1 > ProcVersionSignature: Ubuntu 3.13.0-34.60-generic 3.13.11.4 > Uname: Linux 3.13.0-34-generic x86_64 > ApportVersion: 2.14.1-0ubuntu3.3 > Architecture: amd64 > Date: Sat Aug 23 15:23:38 2014 > InstallationDate: Installed on 2013-06-21 (428 days ago) > InstallationMedia: Ubuntu 12.04.2 LTS "Precise Pangolin" - Release amd64 > (20130213) > ProcEnviron: > LANGUAGE=en_US:en > TERM=xterm > PATH=(custom, no user) > LANG=en_US.UTF-8 > SHELL=/bin/bash > SourcePackage: cairo > UpgradeStatus: Upgraded to trusty on 2014-08-20 (3 days ago) > > To manage notifications about this bug go to: > https://bugs.launchpad.net/ubuntu/+source/cairo/+bug/1360606/+subscriptions > -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1360606 Title: libcairo.so for Ubuntu 14.04 is dead-slow compared to Ubuntu 13.10 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/cairo/+bug/1360606/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
