Rethinking the futex API
Rethinking the futex API
Posted Jun 19, 2020 0:58 UTC (Fri) by krisman (subscriber, #102057)In reply to: Rethinking the futex API by ras
Parent article: Rethinking the futex API
> Waiting on multiple values can be done in user space.
Yes, it can be done in userspace, as mentioned in my original submission of Futex Wait Multiple last year. Still, we experimented with all that, and the performance of a userspace solution or even of a solution based on eventfd (which would be the most obvious way to implement these semantics in userspace with the existing kernel support), is a bottleneck on our real-world scenarios of emulation of windows applications over Wine.