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?
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%
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The Agile Manager
MAY 31, 2022
Compare that to the relatively robust period of 2005 , when real interest rate curves were positive. Labor productivity improvement was so great compared to the hardware and software costs, interest rates had no discernible effect. In real terms, interest rates are still negative for 5 and 10 year horizons.
Brendan Gregg
MARCH 16, 2024
2005-2023: The winter of broken profilers However, the change was then applied to x86-64 (64-bit) as well, which had sixteen registers and didn't benefit so much from a seventeenth. and we may have been flying close to the edge of hardware cache warmth, where adding a bit more instructions caused a big drop.
All Things Distributed
SEPTEMBER 20, 2013
Not everybody agreed that the "N-ary Storage Model" (NSM) was the best approach for all workloads but it stayed dominant until hardware constraints, especially on caches, forced the community to revisit some of the alternatives. The first practical modern implementation is probably C-Store by Stonebraker, et al.
Sutter's Mill
DECEMBER 29, 2011
Now welcome to the hardware jungle. From 1975 to 2005, our industry accomplished a phenomenal mission: In 30 years, we put a personal computer on every desk, in every home, and in every pocket. In 2005, however, mainstream computing hit a wall. The free lunch is over. Galaxy S II, Droid X2, iPhone 4S). There’s no going back.
SQL Performance
JANUARY 23, 2020
Waits and Queues has been used as a SQL Server performance tuning methodology since Tom Davidson published the above article as well as the well-known SQL Server 2005 Waits and Queues whitepaper in 2006. Since CPU and IO consumption translate directly to server hardware and cloud spend, this is significant. Most Queries Don't Wait.
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