mincore is no more useful than pretouch. Unless you lock, a page that was resident at the time of the mincore/pretouch operation can be evicted a few microseconds later. A “this seems to be resident right now” quality does not prevent page faults or long TTSPs and STW pauses on mapped buffer access, it just improves the stats a bit.
Sent from my iPad On Jan 16, 2019, at 9:41 PM, Steven Stewart-Gallus <[email protected]<mailto:[email protected]>> wrote: I think what you want is something like the mincore system call on Linux so your thread can write directly if the page is mapped but offload the work to another thread if it is not mapped. I don't have any experience with the system call though. -- You received this message because you are subscribed to a topic in the Google Groups "mechanical-sympathy" group. To unsubscribe from this topic, visit https://groups.google.com/d/topic/mechanical-sympathy/yL4Yaedgqg4/unsubscribe. To unsubscribe from this group and all its topics, send an email to [email protected]<mailto:[email protected]>. For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "mechanical-sympathy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
