2005 Architecture Hardware 
Daniel Lemire
FEBRUARY 8, 2019
The division by a power of two ( / (2 N )) can be implemented as a right shift if we are working with unsigned integers, which compiles to single instruction: that is possible because the underlying hardware uses a base 2. Thus if 2 N / d has been precomputed, you can compute the division n/d as a multiplication and a shift. Can we do better?
John McCalpin
FEBRUARY 17, 2025
From the form of the equation the units are GB/s * ns = Bytes, but to understand how this maps to computer hardware resources it is almost always more convenient to translate this to units of “cache lines” (with 64 Bytes per cache line in the processors reviewed here). The same is true for software prefetches.)
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Brendan Gregg
NOVEMBER 29, 2017
Hardware virtualization for cloud computing has come a long way, improving performance using technologies such as VT-x, SR-IOV, VT-d, NVMe, and APICv. The latest AWS hypervisor, Nitro, uses everything to provide a new hardware-assisted hypervisor that is easy to use and has near bare-metal performance. I'd expect between 0.1%
John McCalpin
FEBRUARY 17, 2025
From the form of the equation the units are GB/s * ns = Bytes, but to understand how this maps to computer hardware resources it is almost always more convenient to translate this to units of “cache lines” (with 64 Bytes per cache line in the processors reviewed here). The same is true for software prefetches.)
Brendan Gregg
NOVEMBER 28, 2017
Hardware virtualization for cloud computing has come a long way, improving performance using technologies such as VT-x, SR-IOV, VT-d, NVMe, and APICv. The latest AWS hypervisor, Nitro, uses everything to provide a new hardware-assisted hypervisor that is easy to use and has near bare-metal performance. I'd expect between 0.1%
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