Comment by nickelpro
18 hours ago
mmap is also relatively slow (compared to modern solutions, io_uring and friends), and immensely painful for error handling.
It's simple, I'll give it that.
18 hours ago
mmap is also relatively slow (compared to modern solutions, io_uring and friends), and immensely painful for error handling.
It's simple, I'll give it that.
Page faults are slower than being deliberate about your I/O but mapped memory is no faster or slower than "normal" memory, its the same mechanism.
Nah, usually can't have huge pages. Almost certainly can't have giant pages. Can't even fit all L3$ capacity into the L2 TLB if done via 4k pages...
I hadn't thought of that but apparently Linux at least has had support for a while, according to manpage? https://man7.org/linux/man-pages/man2/mmap.2.html