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Your PC is about to get slower
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- Lemon Quarter
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Your PC is about to get slower
A major hardware security issue has been found with all modern Intel processors:
https://www.theregister.co.uk/2018/01/0 ... sign_flaw/
Patches are being rushed out for Linux and Windows, but these will hit performance:
Best case: 17% slowdown
Worst case: 23%
according to one account. AMD processors are not affected.
https://www.theregister.co.uk/2018/01/0 ... sign_flaw/
Patches are being rushed out for Linux and Windows, but these will hit performance:
Best case: 17% slowdown
Worst case: 23%
according to one account. AMD processors are not affected.
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- Lemon Quarter
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Re: Your PC is about to get slower
My understanding is that the problem affects all other operating systems as well. It is a fundamental problem with the security of modern Intel processors. Linux and Windows are the first to issue fixes, but others will have to follow.
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- Lemon Quarter
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Re: Your PC is about to get slower
Here is another article:
https://www.pcworld.com/article/3245606 ... c-mac.html
This article makes it clear in the first sentence that all operating systems are affected. Currently, fixes are only available for Linux it appears, but Microsoft is working on it.
https://www.pcworld.com/article/3245606 ... c-mac.html
This article makes it clear in the first sentence that all operating systems are affected. Currently, fixes are only available for Linux it appears, but Microsoft is working on it.
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- Lemon Quarter
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Re: Your PC is about to get slower
I bet AMD are rubbing their hands, best bit of free advertising they have had in years...
Seems that the synthetic benchmarks caused potentially big slowdowns but real world stuff less so.
Seems that the synthetic benchmarks caused potentially big slowdowns but real world stuff less so.
Michael Larabel, the open-source guru behind the Linux-centric Phoronix website, has run a gauntlet of benchmarks using Linux 4.15-rc6, an early release candidate build of the upcoming Linux 4.15 kernel. It includes the new KPTI protections for the Intel CPU kernel flaw. The Core i7-8700K saw a massive performance decrease in FS-Mark 3.3 and Compile Bench, a pair of synthetic I/O benchmarks. PostgreSQL and Redis suffered a loss, but to a far lesser degree. Finally, H.264 video encoding, timed Linux kernel compilation, and FFmpeg video conversion tasks didn’t lose anything.
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- The full Lemon
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Re: Your PC is about to get slower
Techie-press take on it: http://www.theregister.co.uk/2018/01/02 ... sign_flaw/ . Huge numbers of comments, some of them detailed and well-informed.
From the comments, a reference to a TMF story from last month: "Intel's CEO Just Sold a Lot of Stock" https://www.fool.com/investing/2017/12/ ... stock.aspx
Though I *think* I recognise the name of the author of that article as a commentator who was persistently bearish on ARM.
From the comments, a reference to a TMF story from last month: "Intel's CEO Just Sold a Lot of Stock" https://www.fool.com/investing/2017/12/ ... stock.aspx
Though I *think* I recognise the name of the author of that article as a commentator who was persistently bearish on ARM.
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- Lemon Quarter
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Re: Your PC is about to get slower
I wondered whether people in the know were shorting Intel and going long on AMD. Here is a chart from Yahoo:
https://uk.finance.yahoo.com/quote/AMD/ ... 5UQyJ9fV19
Very profitable!
https://uk.finance.yahoo.com/quote/AMD/ ... 5UQyJ9fV19
Very profitable!
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- Lemon Quarter
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Re: Your PC is about to get slower
Just been reading that some ARM CPU's might be affected too...
https://www.axios.com/massive-chip-flaw ... 78225.html
https://www.axios.com/massive-chip-flaw ... 78225.html
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- Lemon Quarter
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Re: Your PC is about to get slower
AMD Phew!
PS Never was a big fan of Intel. Something about "pages" and backwards compatibility haunts me to this day.
Chris
PS Never was a big fan of Intel. Something about "pages" and backwards compatibility haunts me to this day.
Chris
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- Lemon Slice
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Re: Your PC is about to get slower
Infrasonic wrote:Seems that the synthetic benchmarks caused potentially big slowdowns but real world stuff less so.
My reading of the report suggests that compute-intensive applications are largely unaffected, but anything with a decent load of kernel usage will suffer, because the fix slows down the context switch between user space and kernel space.
So input and output, memory allocation and deallocation, interprocess communications, and time/timer operations are all affected. Any program that does a lot of these will take a hit. It is a rare program that does no input/output at all(!), but some do far more than others. Databases, for example.
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- Lemon Quarter
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Re: Your PC is about to get slower
Servers are likely to take the biggest hit. There are claims that AMD is affected:
http://www.bbc.co.uk/news/technology-42561169
The Register article that has already been quoted twice in this thread quotes AMD as saying it has not been affected. The BBC article quotes AMD as saying that it has already distributed (microcode?) fixes.
http://www.bbc.co.uk/news/technology-42561169
The Register article that has already been quoted twice in this thread quotes AMD as saying it has not been affected. The BBC article quotes AMD as saying that it has already distributed (microcode?) fixes.
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- Lemon Pip
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Re: Your PC is about to get slower
Ubuntu Linux fixes have popped up, here, ready for download.
There appear to be files/modules with intel in the name & some with AMD in the name.
I might delay a bit in case some problem emerges. I worry about potential problems with bugs in kernel code (after the recent Ubuntu panic ).
There appear to be files/modules with intel in the name & some with AMD in the name.
I might delay a bit in case some problem emerges. I worry about potential problems with bugs in kernel code (after the recent Ubuntu panic ).
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- The full Lemon
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Re: Your PC is about to get slower
It seems some of this goes back a long way. From 2007, https://marc.info/?l=openbsd-misc&m=118296441702631
Not as specific and clear-cut as when DNS troubles that blew up in 2008 turned out to have been deconstructed in detail by Dan Bernstein in 2001, but another demonstration of the world ignoring a security guru.
Not as specific and clear-cut as when DNS troubles that blew up in 2008 turned out to have been deconstructed in detail by Dan Bernstein in 2001, but another demonstration of the world ignoring a security guru.
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- Lemon Quarter
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Re: Your PC is about to get slower
https://www.ghacks.net/2018/01/04/micro ... y-updates/
https://support.microsoft.com/en-us/hel ... -kb4056892
https://www.catalog.update.microsoft.co ... =KB4056892
I've just installed KB4056892 through the normal Windows Update channel, I'll report back on any major performance hits for those that want to hold off...
Microsoft released out-of-band security updates for Windows yesterdays that address a recently revealed major security bug in Intel, AMD and ARM processors.
The updates are filed under the IDs KB4056888 , KB4056890. KB4056891, KB4056892, and KB405689. All updates share the following description:
https://support.microsoft.com/en-us/hel ... -kb4056892
https://www.catalog.update.microsoft.co ... =KB4056892
I've just installed KB4056892 through the normal Windows Update channel, I'll report back on any major performance hits for those that want to hold off...
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- Lemon Quarter
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Re: Your PC is about to get slower
Infrasonic wrote:I've just installed KB4056892 through the normal Windows Update channel, I'll report back on any major performance hits for those that want to hold off...
Apparently the major hit is if you are running a server, for desktop users and gamers there's little difference. Comprehensive test results here...
https://www.youtube.com/watch?v=_qZksorJAuY
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- Lemon Quarter
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Re: Your PC is about to get slower
Breelander wrote:Infrasonic wrote:I've just installed KB4056892 through the normal Windows Update channel, I'll report back on any major performance hits for those that want to hold off...
Apparently the major hit is if you are running a server, for desktop users and gamers there's little difference. Comprehensive test results here...
https://www.youtube.com/watch?v=_qZksorJAuY
According to that video desktop '4K read' on NVME SSD's took a hit, but I would imagine the majority of us are still on SATA drives so it's somewhat moot.
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- Lemon Quarter
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Re: Your PC is about to get slower
I have done a couple of reboots and so far at least can't detect any performance hit whatsoever, everything seems as snappy as before.
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- Lemon Quarter
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Re: Your PC is about to get slower
Infrasonic wrote:I have done a couple of reboots and so far at least can't detect any performance hit whatsoever, everything seems as snappy as before.
Unless your AV has also had an update that is part of the is procedure, you may not have the MS Patch activated yet.
There is something about AVs adding a registry key to prevent Blue Screen of Death when the AV conflicts with the OS.
Oh and the patch is breaking things, Sandboxie being the only name I recognised of those mentioned.
Be careful out there.
Slarti
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- Lemon Quarter
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Re: Your PC is about to get slower
I've just installed KB4056892 also -- if that is the relevant fix -- not noticed any difference.
using 128gb ssd .
using 128gb ssd .
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- Lemon Quarter
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Re: Your PC is about to get slower
Slarti wrote:...Unless your AV has also had an update that is part of the is procedure, you may not have the MS Patch activated yet.
There is something about AVs adding a registry key to prevent Blue Screen of Death when the AV conflicts with the OS.
Oh and the patch is breaking things, Sandboxie being the only name I recognised of those mentioned.
jackdaww wrote:I've just installed KB4056892 also -- if that is the relevant fix -- not noticed any difference.
Yes, that's the relevant patch, it takes you up to 1709 os build 16299.192.
The' AV bit' is that some AV's are not compatible and need updating. Those that are compatible should have (but some don't) set a registry key to indicate that they are compatible. Without this key KB4056892 won't be offer to you through Windows Update.
The 'breaking things' bit is down to a known issue with RPC calls. The main victim of this seems to be the 'ASUS AI Suite'. Apparently a beta version is already out that should work in 16299.192.
For a full list of the 'Known Issues' see: https://support.microsoft.com/en-us/hel ... -kb4056892
Oh, and I have had the patch and don't notice anything different.
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