Exclusive details on AMD's Zen
http://www.fudzilla.com/media/k2/items/cache/df2ae72ba22831b634d84d95a3e41f35_L.jpgNo more shared FPU per two coresOur well informed industry sources have shared a few more details about the AMD's 2016 Zen cores and not it appears that the architecture won't use the shared FPU like Bulldozer.
The new Zen uses a SMT Hyperthreading just like Intel. They can process two threads at once with a Hyperthreaded core. AMD has told a special few that they are dropping the "core pair" approach that was a foundation of Bulldozer. This means that there will not be a shared FPU anymore.Zen will use a scheduling model that is similar to Intel's and it will use competitive hardware and simulation to define any needed scheduling or NUMA changes.
Two cores will still share the L3 cache but not the FPU. This because in 14nm there is enough space for the FPU inside of the Zen core and this approach might be faster.We mentioned this in late April where we released a few details about the 16 core, 32 thread Zen based processor with Greenland based graphics stream processor. Zen will apparently be ISA compatible with Haswell/Broadwell style of compute and the existing software will be compatible without requiring any programming changes.Zen also focuses on a various compiler optimisation including GCC with target of SPECint v6 based score at common compiler settings and Microsoft Visual studio with target of parity of supported ISA features with Intel.Benchmarking and performance compiler LLVM targets SPECint v6 rate score at performance compiler settings.We cannot predict any instruction per clock (IPC improvement) over Intel Skylake, but it helps that Intel replaced Skylake with another 14nm processor in later part of 2016. If Zen makes to the market in 2016 AMD might have a fighting chance to narrow the performance gap between Intel greatest offerings.
@包子侯爵 翻译下 建议翻译下 冶天 发表于 2015-8-14 11:16
@包子侯爵 翻译下
两个核心不会共享FPU
Zen的细节是架构将不会使用推土机的共享FPU架构
新的Zen采用了像英特尔的SMT超线程技术（同核心双线程），并且降低推土机基础的“双核心”。
Zen的调度模型将会和英特尔相似，会使用竞争性硬件和仿真来定义任何所需的调度或NUMA变化。
每两个核心仍将共享L3缓存（不是FPU）因为14nm虽然拥有安放FPU足够的空间，但是这样可能更快
四月下旬将会有这款16核心32线程基于格陵兰岛显卡的处理器的细节
Zen显然是和ISA，Haswell/Broadwell的计算和呈现在软件是兼容的
Zen也侧重各种编译器的优化，包括基于SPECint v6的GCC，Microsoft Visual studio和LLVM。
我们无法预测每个主频（IPC改价）是否超过英特尔的Skylake，但是它将有助于英特尔在2016年后期发布替代Skylake的新14nm处理器。如果Zen在2016年上市，AMD可能又一个机会去缩小与英特尔旗舰产品的性能差距
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