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udp: Switch to new socket message after 32KiB instead of 64KiB

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For some reason, this measurably improves performance with qemu and
virtio-net.

Signed-off-by: Stefano Brivio <sbrivio@redhat.com>
This commit is contained in:
Stefano Brivio 2021-09-19 02:49:36 +02:00
parent c2d86b7475
commit ec0bdc10b1
1 changed files with 2 additions and 2 deletions
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4
udp.c
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@ -727,7 +727,7 @@ void udp_sock_handler(struct ctx *c, union epoll_ref ref, uint32_t events,
udp6_l2_iov_tap[i].iov_len = iov_len; udp6_l2_iov_tap[i].iov_len = iov_len;
/* With bigger messages, qemu closes the connection. */ /* With bigger messages, qemu closes the connection. */
if (iov_in_msg && msglen + iov_len > USHRT_MAX) { if (iov_in_msg && msglen + iov_len > SHRT_MAX) {
cur_mh->msg_iovlen = iov_in_msg; cur_mh->msg_iovlen = iov_in_msg;
cur_mh = &udp6_l2_mh_tap[++msg_i].msg_hdr; cur_mh = &udp6_l2_mh_tap[++msg_i].msg_hdr;
@ -797,7 +797,7 @@ void udp_sock_handler(struct ctx *c, union epoll_ref ref, uint32_t events,
udp4_l2_iov_tap[i].iov_len = iov_len; udp4_l2_iov_tap[i].iov_len = iov_len;
/* With bigger messages, qemu closes the connection. */ /* With bigger messages, qemu closes the connection. */
if (iov_in_msg && msglen + iov_len > USHRT_MAX) { if (iov_in_msg && msglen + iov_len > SHRT_MAX) {
cur_mh->msg_iovlen = iov_in_msg; cur_mh->msg_iovlen = iov_in_msg;
cur_mh = &udp4_l2_mh_tap[++msg_i].msg_hdr; cur_mh = &udp4_l2_mh_tap[++msg_i].msg_hdr;