From d0e646f6892e9c85278c9538760a8940c86dcdbb Mon Sep 17 00:00:00 2001 From: hanlin Date: Mon, 11 May 2020 22:20:37 +0800 Subject: vcl svm: fix rx event loss When vcl_epoll_wait_handle_mq handles rx events exceeding maxevents, VPP will not signal because cursize > 0, and the remaining rx events cannot be triggered because the eventfd event has been read. Therefore, we should dequeue all events until cursize = 0. And then handle msg up to maxevents with vcl_epoll_wait_handle_mq_event and those beyond with vcl_handle_mq_event. Type: fix Signed-off-by: hanlin Change-Id: I8a0c87cb41c837deb8284b40f668cc3c7d9d6e56 Signed-off-by: hanlin --- src/vcl/vppcom.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/src/vcl/vppcom.c b/src/vcl/vppcom.c index 2c01589bab5..4fc8bfce581 100644 --- a/src/vcl/vppcom.c +++ b/src/vcl/vppcom.c @@ -2923,7 +2923,7 @@ vcl_epoll_wait_handle_mq (vcl_worker_t * wrk, svm_msg_q_t * mq, } } ASSERT (maxevents > *num_ev); - vcl_mq_dequeue_batch (wrk, mq, maxevents - *num_ev); + vcl_mq_dequeue_batch (wrk, mq, ~0); svm_msg_q_unlock (mq); handle_dequeued: @@ -2931,7 +2931,10 @@ handle_dequeued: { msg = vec_elt_at_index (wrk->mq_msg_vector, i); e = svm_msg_q_msg_data (mq, msg); - vcl_epoll_wait_handle_mq_event (wrk, e, events, num_ev); + if (*num_ev < maxevents) + vcl_epoll_wait_handle_mq_event (wrk, e, events, num_ev); + else + vcl_handle_mq_event (wrk, e); svm_msg_q_free_msg (mq, msg); } vec_reset_length (wrk->mq_msg_vector); -- cgit 1.2.3-korg