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Jeroen W. Pluimers on .NET, C#, Delphi, databases, and personal interests

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Archive for December 12th, 2017

Scalable spinlocks 1: array-based | The Infinite Loop

Posted by jpluimers on 2017/12/12

Cool: [WayBackScalable spinlocks 1: array-based | The Infinite Loop

Last time we saw that spinlock implementations which only use a single synchronization variable (Test-And-Set Lock, Ticket Lock) don’t scale with growing numbers of threads. Today, I want to talk about two spinlock variants that scale. Namely the Graunke and Thakkar Lock1 (1989) and the Anderson Lock2 (1990). Their underlying key idea is to use one synchronization variable per thread instead of one for all threads, to reduce the amount of cache line invalidations when acquiring/releasing the lock. Both spinlock variants store the synchronization variables in an array. This means that there’s an upper bound on the maximum number of thread’s that can compete for the lock concurrently, which must be known a priori. In upcoming blog posts I’m going to show spinlock variants (the MCS Lock and the CLH Lock) that improve upon array-based spinlocks by removing this hard upper limit.

–jeroen

via: [WayBack] Scalable spinlocks 1: array-based | The Infinite Loop – David Berneda – Google+

Posted in Algorithms, Development, Software Development | Leave a Comment »

LINQ Debugging and Visualization – Simple Talk

Posted by jpluimers on 2017/12/12

LINQ is certainly extraordinarily useful. It brings the power of query expressions to C#, allowing an easy way of getting the data you need from a variety of data sources. Up to now, there hasn’t been a VS debugger for LINQ that gives you the means to visualise the data at every point in the chain. Michael Sorens, a keen LINQ user, describes a third-party tool that now promises to make using LINQ something we can all participate in.…

Great read. [WayBackLINQ Debugging and Visualization – Simple Talk

Via: [WayBackLINQ Debugging and Visualisation – Jeroen Wiert Pluimers – Google+

–jeroen

Posted in .NET, Development, LINQ, Software Development | Leave a Comment »

 
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