3 ms·

What type of app can afford to run on Linux (not bare metal) but still needs such low level performance optimizations?

• surajrmal 3y ago
  Lowering CPU usage can save battery. Just because you are running Linux doesn't mean you don't have a power budget.
• p_l 3y ago
  Among many other projects I touched, we had a database engine which planned to move to io_uring as soon as it could be made available (it wasn't distributed outside company, so it was a question of internal infrastructure) PREEMPT_RT also includes a lot of possible low-latency work. io_uring also provides ridiculous performance benefits for normal server code, too.
• sophacles 3y ago
  Context switches are expensive. Often more expensive than operating on the data. io_uring providews a major reduction, or even near elimination of context swithes for io. It provides big win in a lot of server contexts in terms of packets/iops/throughput.
• lukeh 3y ago
  Initial motivation was lack of non-blocking SPI I/O in Linux user space. Then it made sense to use it for everything, it’s a straightforward mapping to Swift’s structured concurrency, so why not?