We've been addressing the topic widely in our reviews, it makes little sense for Ryzen processors that are that powerful to not perform as well in games in CPU bound situations. Microsoft now kind of confirms the issue that Windows 10 does not detect the simulated SMT threads properly, and the simulated SMT threads are weaker compared to real CPU cores. This could hinder the game performance.
In nothing more then a tweet Microsoft seems to have confirmed the existence of this issue. So basically each core gets an extra simulated thread, that is SMT (simultaneous multi-threading) or what Intel refers to as hyper-threading. A real core obviously is stronger compared to a virtual threaded one. Aka we are back to thread-scheduler bugs. Things remain a bit trivial we feel, when we disabled SMT in the BIOS (and just ran 8-threads) performance only increased marginally on some titles, with an exception for some. But who knows, titles like Rise of the Tomb Raider (which is hit the most) might benefit from properly threaded processors big-time.
There's more going on with the scheduler though, a weird fact exposed itself that the output of the diagnostic tools for the Windows 10 scheduler that distributes these computing tasks across cores, estimated an overly optimistic cache memory per core for Ryzen. A Ryzen 7 CPU seems to be recognized as a processor with a 136 MB combined cache, where it is in reality is obviously is 20 MB for L2 and L3 caches.
Meanwhile Windows 10 RTC seems to be disliking 0.25x multipliers, causing timing issues and Microsoft’s scheduler might not understand the different CCX core-to-core latencies either. So yes, most paths now lead back to the thread scheduler.
In short, the Windows thread-scheduler does not line up with the AMD Ryzen architecture.
Back in the days when Intel introduced Hyper-threading many similar issues have been addressed. From here on-wards it will be a waiting game as we'll have to wait and see how Microsoft will address this matter and see what effect these two factors will have on the slightly disappointing game performance results. But sure, it is terrific news that Microsoft found an issue and is correcting it, let us hope that Microsoft sorts out the scheduler and cache issues as soon as possible. Maybe the upcoming Patch Tuesday update scheduled for March 14 will bring this coveted patch.
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Results 1 to 10 of 15
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03-10-2017, 11:42 PM #1C.I.A.
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Microsoft Windows Bug Is Holding Back AMD Ryzen
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03-14-2017, 06:39 AM #2C.I.A.
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speculative excuse for a non stellar performance..
AMD's SAME OLD SAME.
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03-14-2017, 06:50 AM #3C.I.A.
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Naay findings, dili daw ang scheduler ang problema pero dli taga microsoft nag ingun.
Originally Posted by butitoy
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03-14-2017, 10:26 AM #4C.I.A.
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sus, kun submarinohon ni Intel ang Microsoft, na, dili gyud ni mag fix ang issue sa AMD Ryzen 7 w/ Win 10...
i'm just thinking dirty on this... but its very doable in this "Red Ocean" business (kun plano gyud himoon)... hhhaaaayyyyzzzz...
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03-14-2017, 11:00 AM #5C.I.A.
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Mao sad ako gi huna2x. What if AMD will go to apple to make them all red? The make good optimizations with their machines Originally Posted by lloyd_joy
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03-14-2017, 11:15 AM #6C.I.A.
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Originally Posted by Echelnalf
Mao sad ako gi huna2x. What if AMD will go to apple to make them all red? The make good optimizations with their machines
for sure, Apple is eyeing on the APU offering from AMD for the iGPU... hope nice ang power consumption sa batt s offering sa Red para ma stir pud ang pagka relax ni Blue sa Apple devices support... eng eng eng...
kaning CPU wars, money will do the talking baya gyud ani for sure... hehehehe... doggie-dog ni sila... huwat lang gyud ta sa actual na mahitabo... pero, lami kayo mag speculate man gud then waiting game dayon basin sakto ang atoang mga pangagpas...
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03-14-2017, 06:05 PM #7C.I.A.
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but Apples WANTED cool machines , not HOT HEADS.. Originally Posted by Echelnalf
Mao sad ako gi huna2x. What if AMD will go to apple to make them all red? The make good optimizations with their machines
if AMD can make their Processors run cooler than intel.
it will be a big coup...
and for the second time around, Apples head will bloat..
and bash intel like no tomorrow..Last edited by butitoy; 03-14-2017 at 06:09 PM.
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03-14-2017, 08:22 PM #8Junior Member
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https://www.youtube.com/watch?v=6laL-_hiAK0
AMD Ryzen and the Windows 10 Scheduler - No Silver Bullet
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03-14-2017, 11:26 PM #9C.I.A.
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The temp problem was just corrected... Originally Posted by butitoy
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Developers nalay bahala ani hehehe... Originally Posted by tabs14
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03-15-2017, 11:18 AM #10C.I.A.
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Pwede nila e take advantage ang ka "HOT" by adding a coffee warmer feature on their machines without adding additional components then patent. Originally Posted by butitoy
Jokes aside, I really hope this is the start of AMD's time to take the lead.
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