Presentation: Understanding OrderAccess
Andrew Haley
aph at redhat.com
Wed Nov 23 10:40:49 UTC 2016
On 23/11/16 05:08, David Holmes wrote:
> This is a presentation I recently gave internally to the runtime and
> serviceability teams that may be of more general interest to hotspot
> developers.
>
> http://cr.openjdk.java.net/~dholmes/presentations/Understanding-OrderAccess-v1.1.pdf
That's pretty cool; nicely done.
I'd quibble about a couple of minor things:
In Data Race Example: Using Barriers, the use of a naked StoreStore is
rather terrifying. In real-world code it'd be better to use
StoreStore|LoadStore or release unless the author really knows what
they're doing.
The use of "fence" to mean a full barrier is rather idiosyncratic; it
confused me the first time I saw it in HotSpot source, and from time
to time it still does.
But, as I said, these are minor criticisms.
Andrew.
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