AMD Ryzen and Windows 10 are still poorly compatible concepts

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POSTER: computer news   ||    AMD RYZEN AND WINDOWS 10 ARE STILL POORLY COMPATIBLE CONCEPTS	DATE:2017-03-09
The newest processor should run the latest version of the operating system - the logic seems to be simple and understandable.  The newest operating system  must "know" all the instructions implemented in the processor and  able to distribute the load as efficiently as possible if the processor has several cores, especially with the support of "simultaneous multithreading" technologies, when the processor is presented to the operating system as if it had twice as many core than it is really . The reality turns out to be harsh: the software creation of some corporation with its headquarters in Redmond, known as  "Windows 10 operating system", formally though relevant, in fact proved unable to fully work with the new AMD processors.  According to the article published at WCCTech , there is a whole fan of flaws in this OS, which means that the AMD Ryzen processors simply do not show all their performance potential. First, the operating system Windows 10 can not distinguish between the logical and physical core AMD Ryzen, as it does with Intel processors.  For the Windows 10 Task Scheduler,  Ryzen R7 looks like a full-fledged 16-core CPU and, accordingly, the load is distributed evenly, which leads to conflict situations, when one physical core has to load both logical cores, while the other physical core is idle at the same time.  As a result, instead of performance gain of 20-30%, as in the case of Intel processors, there is a drop in performance.  Often it turns out that disabling SMT even improves performance in cases when the application does not know how to parallelize to a large number of threads, which is confirmed by the results of testing a number of Internet resources. For the sake of justice, I must say that such a problem was at one time with Intel HyperThreading, but then was the implementation of SMT  , 15 years ago (SMT support was implemented in Intel Xeon processors in February 2002 Year, and in November of the same year it also entered the consumer market in Pentium 4 processors). Secondly, as it turned out, Windows also incorrectly determines the amount of L2 and L3 caches of AMD Ryzen R7, considering that it is as much as 136 MB, whereas in reality it is almost seven times smaller - 20 MB. Windows 10 Scheduler Single Core Thread Mapping:   * --------------- Data Cache 0, Level 1, 32 KB, Assoc 8, LineSize 64   * --------------- Instruction Cache 0, Level 1, 64 KB, Assoc 4, LineSize 64   * --------------- Unified Cache 0, Level 2, 512 KB, Assoc 8, LineSize 64   * --------------- Unified Cache 1, Level 3, 16 MB, Assoc 16, LineSize 64   - * -------------- Data Cache 1, Level 1, 32 KB, Assoc 8, LineSize 64   - * -------------- Instruction Cache 1, Level 1, 64 KB, Assoc 4, LineSize 64   - * -------------- Unified Cache 2, Level 2, 512 KB, Assoc 8, LineSize 64   - * -------------- Unified Cache 3, Level 3, 16 MB, Assoc 16, LineSize 64 A similar misunderstanding also leads to problems and reduces the overall speed. According to unofficial data, the corresponding update from Microsoft is already ready and should have been released in February, but as a result, the release was postponed.   Related Products :

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