Cumulative Update KB4482887 Windows 10 v1809 Build 17763.348 - March 1 Win Update

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  1.    #320

    Steve C said: View Post
    As requested:
    CPU-Info Version 2.1 © 2019 Dimitri Delopoulos




    Computer Model : Inspiron 7537
    Computer Name : LAPTOP
    Processor Type : Central Processor
    Manufacturer : GenuineIntel
    CPU Family : Intel(R) Core(TM) i7 processor
    CPU Architecture : x64
    Name : Intel(R) Core(TM) i7-4500U CPU @ 1.80GHz
    Description : Intel64 Family 6 Model 69 Stepping 1
    Number of Cores : 2
    Number of Logical Processors : 4
    Current Clock Speed : 1800
    Socket Designation : CPU Socket - U3E1
    Upgrade Method : rPGA988B
    CPUID : 00040651
    Display Family : 06H
    Display Model : 45H


    Running microcode revision : 0x24 (loaded by UEFI)
    UEFI CPU microcode revision : 0x24


    Boot Mode : UEFI
    UEFI Version : A16
    UEFI Manufacturer : Dell Inc.
    UEFI Serial Number :
    UEFI Release Date : 24/05/2018 (292 days ago)

    Great, thanks a lot!
    As suspected, you didn't have the two registry entries, because your CPU microcode is up-to-date, according to Intel's microcode guidance. So even if you had installed any Microsoft provided microcode update, it will not load at boot time and certainly not created any registry entries.
    You can read more on the subject in the "How microcode works" section, in this post
    Thanks again for the output, so we can verify how this whole thing works.
      My ComputerSystem Spec

  2.    #321

    Steve C said: View Post
    This is getting complicated. I've edited the Registry to enable to retpoline option but still have the Intel iaStorA.stys driver. Should I revert to the Standard SATA AHCI driver as shown below?
    Attachment 227045
    The real question, is more complicated than that.
    Even if you do revert to the Standard AHCI, what about all other drivers, that are not compiled with Retpoline? Won't these be an obstacle to the "efficiency" of Retpoline?
      My ComputerSystem Spec

  3.    #322

    boombastik said: View Post
    Keep in mind for windows to use retpoline need the driver to be recompliled with retpoline.
    So if u want back the performance from sata drives for example you need to be on the STORAHCI driver instead of Intel's RST.



    Windows automatically will use retpoline with recompiled drivers and the old mitigation for anything else.
    @boombastik How to check?
      My ComputerSystem Spec

  4.    #323

    @khanmein i don't know but i feel that windows default drivers are created with repoline in mind.

    I don't believe that iastora drivers use retpoline. But if u uninstall them your machine may be unbootable.
      My ComputerSystem Spec

  5.    #324

    ddelo said: View Post
    The real question, is more complicated than that.
    Even if you do revert to the Standard AHCI, what about all other drivers, that are not compiled with Retpoline? Won't these be an obstacle to the "efficiency" of Retpoline?
    Hi ddelo, that is true but the I/O seems to be biggest hit by Spectre, I looked at the standard AHCI (Storahci.sys) its version is 10.0.17763.168 date 12/5/2018 so not sure this would even be retpoline compiled, depends on how far back they started.

    Probably when they roll this out in 19H1 enabled they will include driver support for it.

    Little bit OT, I have a VMwin10 1809 (same setup and main/parent system) and noticed the value for "FeatureSettings" right above the other strings in reg doesn't match up between VM and main system, that values changes with each change you make with FeatureSettingsOverride/FeatureSettingsOverrideMask..
    I looked around but couldn't find any info on FeatureSettings to see what it should be, I never messed with it before.

    For example with 1809 default of FeatureSettingsOverride 0, FeatureSettingsOverrideMask 3 on my main system I have FeatureSettings 800 and on VM 0 value, could be that it is a VM, there no microcode AFAIK.
      My ComputerSystem Spec

  6.    #325

    boombastik said: View Post
    @khanmein i don't know but i feel that windows default drivers are created with repoline in mind.

    I don't believe that iastora drivers use retpoline. But if u uninstall them your machine may be unbootable.
    I don't think that would happen, windows should load a default AHCI driver, just like if you uninstall your video driver you still have VGA standard driver.
    You could also just update and point it to system32\drivers\storahci.sys from Device manager but probably best to wait this should get sorted IMO when it's fully rolled out.
      My ComputerSystem Spec

  7.    #326

    Mine was 0 and i make it 800. (i7 4790)
    In 19h1 it becomes 400.

    Even if u uninstall from device manager iastora it continues to run if u see it with driverview program. (nirsoft)

    The right procedure is:
    From device manager u must
    1)uninstall first the driver with the option delete it permanently
    2)restart your machine
    3)from cmd admin : sc delete iastora

    All the actions with your responsibility.
    Last edited by boombastik; 1 Week Ago at 08:32.
      My ComputerSystem Spec

  8.    #327

    @boombastik @ EdKiefer My storachi.sys v10.0.17763.168 (12/6/2018)
      My ComputerSystem Spec

  9.    #328

    khanmein said: View Post
    @boombastik @ EdKiefer My storachi.sys v10.0.17763.168 (12/6/2018)
    you are ok then!
      My ComputerSystem Spec

  10.    #329

    boombastik said: View Post
    Mine was 0 and i make it 800. (i7 4790)
    In 19h1 it becomes 400.
    Thanks, that sounds right, with a 400/400 I think I did get FeatureSettings of 400, would have to check, but that matches mine so must be VM are different being shared HW.

    Edit, Setting a 400/400 made featureSettings c00 but in my VM it is 400 for same settings (FeatureSettingsOverride/.FeatureSettingsOverrideMask)
    Well since PS output is ok, I guess it is right.
      My ComputerSystem Spec


 
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