Results 1 to 8 of 8

Thread: Tumbleweed / Leap15 performance much worse than 42.3

  1. #1

    Default Tumbleweed / Leap15 performance much worse than 42.3

    I recently upgraded from 42.3 to tumbleweed and found some FPGA synthesize jobs (using Altera/Intel Quartus 17.1) which I run regularly had slowed down significantly. To identify the problem, I did some tests and freshly installed 42.3 from the image, then updated to latest 42.3, then upgraded to 15.0. Here the results:

    42.3 (kernel 4.4.76, from image) : 330 sec
    42.3 (kernel 4.4.132, latest update): 320 sec
    15.0 (kernel 4.12.14): 740 sec
    Tumbleweed(kernel 4.16.12): 725 sec

    All on the same HW (Zotac Box / Intel Core I3), with plenty of RAM (16 GB), and I also tried to boot with pti=off to avoid Spectre/Meltdown bugfixes - did not help. Furthermore, the problem is not related to the Altera SW, Xilinx Vivado shows similar results.

    What did happen there? I've been using SUSE since 1994 but never experienced something like that. Did people forget the compile optimizations when building shared libraries? Or do newer kernels load CPU-FW related to spectre and meltdown bugs that are slowing down the system by 60% ? It feels like working on my old laptop from 10 years ago.

  2. #2
    Join Date
    Nov 2013
    Location
    Kamloops, BC, Canada
    Posts
    3,974

    Default Re: Tumbleweed / Leap15 performance much worse than 42.3

    I cannot confirm your results, and I cannot provide an answer.

    For me, in all I do, I find 15.0 and TW performance better that 42.3.

    Not sure what to suggest, can only offer "Good Luck".
    -Gerry Makaro
    Fraser-Bell Info Tech
    Solving Tech Mysteries since the Olden Days!
    ~~
    If I helped you, consider clicking the Star at the bottom left of my post.

  3. #3
    Join Date
    Jun 2008
    Location
    Auckland, NZ
    Posts
    20,378
    Blog Entries
    1

    Default Re: Tumbleweed / Leap15 performance much worse than 42.3

    Maybe you need to consider compiling your own kernel more suited to your needs.
    openSUSE Leap 15.0; KDE Plasma 5

  4. #4

    Default Re: Tumbleweed / Leap15 performance much worse than 42.3

    What suits my needs? Is it really the kernel or rather a library? And am I the only one with such a strange experience? Difficult to image given that it slowed down by more than a factor of 2.

  5. #5
    Join Date
    Jun 2008
    Location
    Auckland, NZ
    Posts
    20,378
    Blog Entries
    1

    Default Re: Tumbleweed / Leap15 performance much worse than 42.3

    I have no idea - I don't use such software. Like Gerry also mentioned, I haven't been impacted, but I'm not doing anything beyond basic desktop tasks. Maybe you could start by seeking support from Altera.
    openSUSE Leap 15.0; KDE Plasma 5

  6. #6
    Join Date
    Jun 2008
    Location
    Auckland, NZ
    Posts
    20,378
    Blog Entries
    1

    Default Re: Tumbleweed / Leap15 performance much worse than 42.3

    openSUSE Leap 15.0; KDE Plasma 5

  7. #7
    Join Date
    Jun 2008
    Location
    San Diego, Ca, USA
    Posts
    11,273
    Blog Entries
    2

    Default Re: Tumbleweed / Leap15 performance much worse than 42.3

    Agreed that your likely best first steps to addressing your problem is to gather more information, specifically whether others running your combination of kernel and software are experiencing the same slowdown.

    That means trying to contact others through common methods like
    Software community support like forums, mail lists, IRC
    Social communities like Reddit

    We here in the openSUSE forums probably are too general purpose and not specific to the software you're running.

    IMO,
    TSU
    Beginner Wiki Quickstart - https://en.opensuse.org/User:Tsu2/Quickstart_Wiki
    Solved a problem recently? Create a wiki page for future personal reference!
    Learn something new?
    Attended a computing event?
    Post and Share!

  8. #8
    Join Date
    Jun 2008
    Location
    Groningen, Netherlands
    Posts
    19,845
    Blog Entries
    14

    Default Re: Tumbleweed / Leap15 performance much worse than 42.3

    Did you inspect the output of
    Code:
    systemd-analyze blame
    ?
    ° Appreciate my reply? Click the star and let me know why.

    ° Perfection is not gonna happen. No way.

    https://en.opensuse.org/openSUSE:Board#Members
    http://en.opensuse.org/User:Knurpht
    http://nl.opensuse.org/Gebruiker:Knurpht

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •