Yo Hal! On Thu, 19 Jan 2023 21:43:08 -0800 Hal Murray <halmur...@sonic.net> wrote:
> g...@rellim.com said: > > Sadly, that no longer works on modern CPUs with out of order > > execution. Unless wrapped in a mutex, or atomic, and that is now a > > no-no. > > Do you have a good reference for that? Many ariticle on lwn.net. > I'd like something like a nice blog article that explains things. Sadly work in this area has been slow and disjoint. Following lwn.net is the onely way I know to keep up with it. > What is the new/wonderful way? Even if you do something like a > kernel call with a file handle, deep inside there I'd expect a mutex > to make sure the right thing happens if 2 threads try to do the same > operation at the same time. Many techniques, RCU, Red/Black trees, etc. > Is there a blog type page describing the TIME_BITS stuff? Yes, the gpsd issue: https://gitlab.com/gpsd/gpsd/-/issues/152 Which has links to other sources. RGDS GARY --------------------------------------------------------------------------- Gary E. Miller Rellim 109 NW Wilmington Ave., Suite E, Bend, OR 97703 g...@rellim.com Tel:+1 541 382 8588 Veritas liberabit vos. -- Quid est veritas? "If you can't measure it, you can't improve it." - Lord Kelvin
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