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term: io-uring: increase CQ ring size

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Since we use multishot reads, the SQ (submit queue) doesn't have to be
very big, but the CQ (complete queue) does, since it may receive many
completions at once.
This commit is contained in:
Daniel Eklöf 2025-05-08 13:01:19 +02:00
parent 79182ac287
commit c5193eebcd
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GPG key ID: 5BBD4992C116573F
1 changed files with 8 additions and 2 deletions
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10
terminal.c
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@ -303,6 +303,7 @@ fdm_ptmx_eventfd(struct fdm *fdm, int fd, int events, void *data)
const int buffer_id = cqe->flags >> IORING_CQE_BUFFER_SHIFT;
const ssize_t count = cqe->res;
const uint8_t *buf = term->uring.buffers[buffer_id];
io_uring_cqe_seen(&term->uring.ring, cqe);
xassert(term->interactive_resizing.grid == NULL);
vt_from_slave(term, buf, count);
@ -311,7 +312,8 @@ fdm_ptmx_eventfd(struct fdm *fdm, int fd, int events, void *data)
term->uring.bring, (void *)buf, term->uring.bsize,
buffer_id, io_uring_buf_ring_mask(term->uring.bcount), 0);
io_uring_buf_ring_cq_advance(&term->uring.ring, term->uring.bring, 1);
//io_uring_buf_ring_cq_advance(&term->uring.ring, term->uring.bring, 1);
io_uring_buf_ring_advance(term->uring.bring, 1);
}
if (!term->render.app_sync_updates.enabled) {
@ -1667,7 +1669,11 @@ term_window_configured(struct terminal *term)
#if defined(FOOT_IO_URING)
{
int ret = io_uring_queue_init(2, &term->uring.ring, 0);
struct io_uring_params params = {
.cq_entries = term->uring.bcount + 16,
};
//int ret = io_uring_queue_init(2, &term->uring.ring, 0);
int ret = io_uring_queue_init_params(2, &term->uring.ring, &params);
if (ret < 0) {
LOG_ERRNO_P(-ret, "failed to initialize io_uring queue");
BUG("cannot yet handle failure to initialize io_uring");