RFR (XS): 8188877: Improper synchronization in offer_termination
aph at redhat.com
Wed Nov 29 10:24:09 UTC 2017
On 28/11/17 21:11, White, Derek wrote:
> Offer-termination just has a simple for-loop that delays some number of cycles. As high as 4k iterations * 140 cycles (per SpinPause() on x86), could be 573,000 cycles or so. For this case, especially where the termination test is a simple load, I think we should test _offered_termination in the spin-wait. This should have low overhead on the spinning thread and impose no impact on other threads.
Please point to the exact lines of code you're talking about.
Java Platform Lead Engineer
Red Hat UK Ltd. <https://www.redhat.com>
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