Since the 2.0 kernel release, Linux has supported a large number of SMP systems based on a variety of CPUs. Linux has done an excellent job of abstracting differences among these CPUs, even in kernel code. This article is an overview of one important difference: how CPUs allow memory accesses to be reordered in SMP systems. Memory accesses are among the slowest of a CPU's operations, due to the fa
General I am a software engineer at Google, where I've been since March 2014. I now work mostly on concurrent programming issues, both generally, and focussed on Android. I am an ACM Fellow, and a past Chair of ACM SIGPLAN (2001-2003). Until late 2017 I chaired the ISO C++ Concurrency Study Group (WG21/SG1), where I continue to actively participate. Publications A list of my selected publications
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