Virtual CPUs with Amazon Web Services
Some months ago, Amazon Web Services changed the way they measure CPU capacity on their EC2 compute platform. In addition to the old ECUs, there is a new unit to measure compute capacity: vCPUs. The instance type page defines a vCPU as “a hyperthreaded core for M3, C3, R3, HS1, G2, and I2.” The description seems a bit confusing: is it a dedicated CPU core (which has two hyperthreads in the E5-2670
Strategy: Use Linux Taskset to Pin Processes or Let the OS Schedule It? - High Scalability -
« Stuff The Internet Says On Scalability For October 25th, 2013 | Main | Google's Sanjay Ghemawat on What Made Google Google and Great Big Data Career Advice » This question comes from Ulysses on an interesting thread from the Mechanical Sympathy news group, especially given how multiple processors are now the norm: Ulysses: On an 8xCPU Linux instance, is it at all advantageous to use the Linux t
C, Erlang, Java and Go Web Server performance test – 后端技术 by Tim Yang
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How long does it take to make a context switch?
That's a interesting question I'm willing to spend some of my time on. Someone at StumbleUpon emitted the hypothesis that with all the improvements in the Nehalem architecture (marketed as Intel i7), context switching would be much faster. How would you devise a test to empirically find an answer to this question? How expensive are context switches anyway? (tl;dr answer: very expensive) The lineup
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Processor Affinity - Part 1
