diff options
author | Roman Penyaev <rpenyaev@suse.de> | 2019-05-27 21:05:12 +0200 |
---|---|---|
committer | Jens Axboe <axboe@kernel.dk> | 2019-05-27 14:54:18 -0600 |
commit | f3b78a78240e2cf8826291501f9ee3f2112e7dfe (patch) | |
tree | a6049ff2ae436238267e54492db822e1542170fe /test | |
parent | e60729e64189c908c61254e9743daee7db47f88f (diff) |
liburing: introduce io_uring_for_each_cqe() and io_uring_cq_advance()
io_uring_cqe_seen() contains write memory barrier (at least for !x86),
so calling it can be very expensive for a big number of cqes.
Would be better to have a loop over all available cqes and only then
advance the cq ring once, e.g.:
struct io_uring_cqe *cqe;
unsigned nr, head;
nr = 0;
io_uring_for_each_cqe(&ring, head, cqe) {
/* handle cqe */
if (++nr == max)
break;
}
io_uring_cq_advance(&ring, nr);
Signed-off-by: Roman Penyaev <rpenyaev@suse.de>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Diffstat (limited to 'test')
0 files changed, 0 insertions, 0 deletions