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Dimizu
Known Participant
September 22, 2016

P: Slow performance on Xeon CPUs

  • September 22, 2016
  • 234 replies
  • 9088 views

I noticed that LR clone and brush tool on my XEON E5-1650 0 3.20GHz (Attention: E5-1650 0 and not E5-1650 v4) can not stress my CPU and after x minutes of working LR slow down, until I have to restart it.

Please see the full diskussion with the problem here: https://forums.adobe.com/thread/2210245 (test with different Lightroom versions, confrontation with a weak laptop, that works fine, tests wit other graphic grafic card, test with other bios settings etc. No results. Only restart LR or minor display resolution helps.)

Can anyone with an XEON E5-1650 0 3.2Ghz confirm this?

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    234 replies

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    Adobe Employee
    simonsaith
    Adobe Employee
    September 26, 2016
    What does Lightroom's Help>System Info... say? It should report the processor count and the maximum number of thread count used by the image processing pipeline?

    Some made the observation that Lr was performant right after a launch and then gets slower after intense brushing. Is it on a single photo or do you typically have to walk several photos to reproduce it? Do you remember which version of Lr this started to happen? Do you have Lr mobile sync turned on? What happens if you pause the sync and then relaunch Lr?
    Todd Shaner
    Todd Shaner
    Legend
    September 26, 2016
    Agreed. We've seen reports with this type of performance issue from users with Intel i7 and Xeon processors as well as AMD processors. The one common element is that their processors are six or more cores.
    B
    bob frost
    Inspiring
    September 26, 2016

    Can we have a comment from Adobe on this please. Can't you replicate it?


    Bob frost

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    DimizuAuthor
    Known Participant
    September 26, 2016
    This is definitely my last test (I spend a lot of time for testing)!

    In forum adobe a user sad: downgrade to 2015.4 helps.

    I tested it. Result: not helps!

    Assaf Frank
    Assaf Frank
    Participating Frequently
    September 26, 2016
    you will also notice that if you export images after lightroom restart it will be much faster and the CPU will reach 100% but if you do the same export after working on some images and the slowness sets in the same export will take much longer the lightroom will not max out the CPU usage. see more on this tread. https://feedback.photoshop.com/photoshop_family/topics/lightroom-image-export-is-much-faster-after-restart-cc-2016-6-1-and-before I suspect this is also linked to 6 or more CPUs as you will see on the link above when Stefan tried to replicate it on 4 cores CPU there was no reduction in speed.
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    bob frost
    Inspiring
    September 26, 2016

    But it is not just Xeons; my cpu is a i7-5930K, 6/12 core. Next time I have a lot of nefs to edit, I will try again with the cpu affinity set to 4/8 core for LR.


    Bob frost

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    DimizuAuthor
    Known Participant
    September 26, 2016
    Yes, that's also my experience. Once the system slow down, then also my system does exactly as you say. Then I musst restart Lightroom.
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    bob frost
    Inspiring
    September 26, 2016

    I haven't tried editing your file, but I do have some evidence now to back up what you and others are saying. Normally, I only edit a few files at a time, and have no problems with speed other than rendering slowing down with time. But yesterday my wife wanted me to edit 40 files 'immediately' and print them. And towards the end of that LR did start misbehaving. It was slow doing anything, and sometimes showed me the wrong image in Develop; the develop screen was out of sync with the filmstrip and it took a few repeated clicks to get the right image on screen. Even in the print module it was showing the wrong image.

    Bob Frost

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    DimizuAuthor
    Known Participant
    September 26, 2016
    Hello Robert, here my dng file: https://www.dropbox.com/s/d6811phy0qo...

    Could you test and apply the same local corrections? Then in the develop module step to another photo, repeat this 20x, then return and make again extreme other local corrections. How does it look the speed? Especially in comparison to immediate LR start and after a few minutes of intense local adjustments. Thank you.
    Todd Shaner
    Todd Shaner
    Legend
    September 25, 2016
    The OP here is using a Quadro K5000 with the latest drivers, so his issue is related to the 6-core Xeon processor. I'm using an i7-860 quad-core processor and low-end Quadro 600 graphics card. With GPU enabled the only issue I have is that it slows down the Adjustment Brush and Luminance slider so I generally keep it disabled. My modest system with 21 Megapixel raw files and a 2560 x 1440 monitor runs quite well, even when making extensive local adjustments to a large number of files. It's a mystery why some 6-core and higher systems have these performance issues.
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