Searched hist:e2848bc5 (Results 1 – 2 of 2) sorted by relevance
/openbmc/qemu/block/ |
H A D | io_uring.c | e2848bc5 Tue May 31 05:50:11 CDT 2022 Sam Li <faithilikerun@gmail.com> Use io_uring_register_ring_fd() to skip fd operations
Linux recently added a new io_uring(7) optimization API that QEMU doesn't take advantage of yet. The liburing library that QEMU uses has added a corresponding new API calling io_uring_register_ring_fd(). When this API is called after creating the ring, the io_uring_submit() library function passes a flag to the io_uring_enter(2) syscall allowing it to skip the ring file descriptor fdget()/fdput() operations. This saves some CPU cycles.
Signed-off-by: Sam Li <faithilikerun@gmail.com> Message-id: 20220531105011.111082-1-faithilikerun@gmail.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|
/openbmc/qemu/ |
H A D | meson.build | e2848bc5 Tue May 31 05:50:11 CDT 2022 Sam Li <faithilikerun@gmail.com> Use io_uring_register_ring_fd() to skip fd operations
Linux recently added a new io_uring(7) optimization API that QEMU doesn't take advantage of yet. The liburing library that QEMU uses has added a corresponding new API calling io_uring_register_ring_fd(). When this API is called after creating the ring, the io_uring_submit() library function passes a flag to the io_uring_enter(2) syscall allowing it to skip the ring file descriptor fdget()/fdput() operations. This saves some CPU cycles.
Signed-off-by: Sam Li <faithilikerun@gmail.com> Message-id: 20220531105011.111082-1-faithilikerun@gmail.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com>
|