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AMD Preps BIOS Update to Fix FMA3 Freezes for Ryzen
AMD will be issueing a new BIOS for Ryzen motherboards, the company discovered why FMA3 code is causing system hangs on PCs using a new Ryzen desktop processor. AMD didn’t provide a detailed report on the root cause, the company said that BIOS changes will be distributed to motherboard manufacturers to resolve the issue.
Customers are encouraged to keep an eye on their motherboard vendor’s website for an update, reports digital trends.
We are aware of select instances where FMA code can result in a system hang,” the company said. “We have identified the root cause.”
Ryzen processors reportedly cause a hard system lock when running certain FMA3 workloads. The first sign of trouble appeared in the open-source processor benchmark Flops (v2) by Alexander “Mystical” Yee. This simple program provides separate versions supporting specific processor architectures, such as Intel’s Haswell, Skylake, and so on.
But because the author has yet to upload a version for AMD’s new Zen architecture used in the Ryzen chips, the Haswell-specific binary is the version of choice for testing Ryzen … at least, for now.
Using the Haswell binary is important because it supports the Fused Multiply-Add (FMA) microprocessor instruction set, which is also supported by AMD’s Ryzen processors. The short description of FMA is that the processor can compute A+BxC in one step before rounding the final result. The “unfused” method involves BxC first, rounding the number, adding that to A, and rounding the final result.
However, Ryzen’s issue with FMA3 isn’t locked to the Flops benchmark. Simple apps with basic user privileges can crash a Ryzen-based machine. Even more, code using FMA3 could be executed on virtual machines running on AMD’s upcoming Zen-based “Naples” processors for the enterprise. Thus, finding the FMA3 issue in Flops now saved AMD and corporations from a lot of headache stemming from the security implications alone at the launch of Naples.
“Don’t be fooled by the Haswell binary,” Yee said. “The benchmark is five years old and I’ve largely neglected it for the last three. So I haven’t updated it for Zen yet. Any processor will be able to run any of the binaries if it supports the underlying instruction sets. If it doesn’t, the program merely crashes with an ‘illegal instruction.’ Under no circumstances should a user-mode application be able to bring down an entire system.”
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Amx85
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Joined: 2016-09-28
Senior Member
Posts: 330
Joined: 2016-09-28
#5411400 Posted on: 03/23/2017 04:11 PM
So fast response, i hope other bugfixes comes soon
So fast response, i hope other bugfixes comes soon
schmidtbag
Senior Member
Posts: 4001
Joined: 2012-11-10
Senior Member
Posts: 4001
Joined: 2012-11-10
#5411433 Posted on: 03/23/2017 04:59 PM
Agreed. I was wondering when an issue like this was going to pop up. For something as complex as modern x86 CPUs, problems are inevitable from a fresh new architecture.
Bugs are expected from a new platform and it's their job to fix them if they want to gain trust from consumers.
Agreed. I was wondering when an issue like this was going to pop up. For something as complex as modern x86 CPUs, problems are inevitable from a fresh new architecture.
PrMinisterGR
Senior Member
Posts: 6972
Joined: 2014-09-27
Senior Member
Posts: 6972
Joined: 2014-09-27
#5411448 Posted on: 03/23/2017 05:28 PM
Another piece of software that benefits Ryzen just by switching the target architecture to Haswell.
Another after LLVM itself.
Another piece of software that benefits Ryzen just by switching the target architecture to Haswell.
Another after LLVM itself.
waltc3
Senior Member
Posts: 924
Joined: 2014-07-22
Senior Member
Posts: 924
Joined: 2014-07-22
#5411451 Posted on: 03/23/2017 05:33 PM
Yep, with new architectures it's as expected as the weather...
Agreed. I was wondering when an issue like this was going to pop up. For something as complex as modern x86 CPUs, problems are inevitable from a fresh new architecture.
Yep, with new architectures it's as expected as the weather...
raminrostami
Junior Member
Posts: 8
Joined: 2017-03-24
Junior Member
Posts: 8
Joined: 2017-03-24
#5411731 Posted on: 03/24/2017 07:18 AM
One-sided intel Devoted news....above news 100% is fake ,wrong
i email this newd to ryzen manager,,,they answer after above 200.000 cpu ryzen selling , we dont have even 1 hardware problem, we check all ryzen cpu user logs and erorrs
what is fact?
do you remembet CPU-Z software when ryzen lunch, cant see ryzen??? because ryzen is new technology, so frist week it gives erorr , but after cpuz admin ,update software and define ryzen in cpuz,,, it works exclent, true???
above news comes from below forum
problem=problem is like cpu-z erorr.... 1 person use benchmark software and after he run software on windows10,,,, software start to test cpu,motherboard,chipset and... all new, so that old software hang(not all system)
no cpu hardware erorr , just old suftware need simple update(define ryzen) , ryzen not gilty (some old software cant see all 16 threat , like games, games use max 4threate,2core, for this i7-7700 can win(only old game) i7-6950x 10 core and ryzen 1700 )
if you remember 2002-2004 , when amd invent 2 core , many games cant see 2th core,,, do you remember???so some stupid in that time think intel 1 core more powerfull than amd 2core!!!!! but after 6-8 mounth after software update , amd 2 core real power,speed apear and intel goes down
......forum.hwbot.org/showthread.php?t=167605.......
dont belive intel seller negative gossip , they are angry from powerfull ryzen
One-sided intel Devoted news....above news 100% is fake ,wrong
i email this newd to ryzen manager,,,they answer after above 200.000 cpu ryzen selling , we dont have even 1 hardware problem, we check all ryzen cpu user logs and erorrs
what is fact?
do you remembet CPU-Z software when ryzen lunch, cant see ryzen??? because ryzen is new technology, so frist week it gives erorr , but after cpuz admin ,update software and define ryzen in cpuz,,, it works exclent, true???
above news comes from below forum
problem=problem is like cpu-z erorr.... 1 person use benchmark software and after he run software on windows10,,,, software start to test cpu,motherboard,chipset and... all new, so that old software hang(not all system)
no cpu hardware erorr , just old suftware need simple update(define ryzen) , ryzen not gilty (some old software cant see all 16 threat , like games, games use max 4threate,2core, for this i7-7700 can win(only old game) i7-6950x 10 core and ryzen 1700 )
if you remember 2002-2004 , when amd invent 2 core , many games cant see 2th core,,, do you remember???so some stupid in that time think intel 1 core more powerfull than amd 2core!!!!! but after 6-8 mounth after software update , amd 2 core real power,speed apear and intel goes down
......forum.hwbot.org/showthread.php?t=167605.......
dont belive intel seller negative gossip , they are angry from powerfull ryzen
Aura89
Senior Member
Posts: 7251
Joined: 2008-07-31
Senior Member
Posts: 7251
Joined: 2008-07-31
#5411733 Posted on: 03/24/2017 07:53 AM
For something as complex as modern
I wish people had that mindset when it comes to games, especially vast open-world games or dynamic games
Another piece of software that benefits Ryzen just by switching the target architecture to Haswell.
Another after LLVM itself.
Out of curiosity, what does this mean exactly?
For something as complex as modern
I wish people had that mindset when it comes to games, especially vast open-world games or dynamic games
Another piece of software that benefits Ryzen just by switching the target architecture to Haswell.
Another after LLVM itself.
Out of curiosity, what does this mean exactly?
schmidtbag
Senior Member
Posts: 4001
Joined: 2012-11-10
Senior Member
Posts: 4001
Joined: 2012-11-10
#5411889 Posted on: 03/24/2017 03:23 PM
Eh... it depends on the game. For some games, glitches are inevitable and people need to just chill out. Take Witcher 3 for example, which had a handful of glitches but they didn't ruin gameplay, they didn't make the game a laughingstock, and most (if not all) were eventually fixed. Sometimes, these kinds of glitches give a game character.
Meanwhile, there are games like Sim City 2013, which punished players due to crappy servers. Or Assassins Creed Unity, which was riddled with game-ruining glitches. Or that Batman game (I forget which one) that was so unplayable for weeks that it was taken off Steam. Or GTA4, which was left with no performance optimizations and had memory leaks. These are things that are just plain unacceptable on release date. It gets you to question if they ever tested the game for more than 10 minutes on a PC weaker than whatever $2500 could buy you at the time of their release.
Not to sound old-timey, but I miss the days where you bought a game and you got what you paid for. You bought a game that was well-tested and stable at release date, because patches just weren't viable. Of course, games were much simpler back when they were still shipped on CDs (not DVDs) and floppies, but, it was also much harder to get a wide-audience of test results before publishing too. It reminds me of the concept of authors who write their entire books on typewriter, because you are much more likely to do things right the first time around when you can't easily undo your mistakes.
I wish people had that mindset when it comes to games, especially vast open-world games or dynamic games
Eh... it depends on the game. For some games, glitches are inevitable and people need to just chill out. Take Witcher 3 for example, which had a handful of glitches but they didn't ruin gameplay, they didn't make the game a laughingstock, and most (if not all) were eventually fixed. Sometimes, these kinds of glitches give a game character.
Meanwhile, there are games like Sim City 2013, which punished players due to crappy servers. Or Assassins Creed Unity, which was riddled with game-ruining glitches. Or that Batman game (I forget which one) that was so unplayable for weeks that it was taken off Steam. Or GTA4, which was left with no performance optimizations and had memory leaks. These are things that are just plain unacceptable on release date. It gets you to question if they ever tested the game for more than 10 minutes on a PC weaker than whatever $2500 could buy you at the time of their release.
Not to sound old-timey, but I miss the days where you bought a game and you got what you paid for. You bought a game that was well-tested and stable at release date, because patches just weren't viable. Of course, games were much simpler back when they were still shipped on CDs (not DVDs) and floppies, but, it was also much harder to get a wide-audience of test results before publishing too. It reminds me of the concept of authors who write their entire books on typewriter, because you are much more likely to do things right the first time around when you can't easily undo your mistakes.
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Bugs are expected from a new platform and it's their job to fix them if they want to gain trust from consumers.