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authorhanlin <hanlin_wang@163.com>2020-05-11 22:20:37 +0800
committerFlorin Coras <florin.coras@gmail.com>2020-05-16 22:09:05 +0000
commit8337806b5f03b6603a0e24ae7971672e1a7476ab (patch)
treed098d61dc0578b46251e409079093e08fc4c1751 /src/vcl/vppcom.c
parent765ef37670a4c32ccd3da345197e2b103d1a22b0 (diff)
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 Ticket: VPP-1873 Signed-off-by: hanlin <hanlin_wang@163.com> Change-Id: I8a0c87cb41c837deb8284b40f668cc3c7d9d6e56 Signed-off-by: hanlin <hanlin_wang@163.com> (cherry picked from commit d0e646f6892e9c85278c9538760a8940c86dcdbb)
Diffstat (limited to 'src/vcl/vppcom.c')
-rw-r--r--src/vcl/vppcom.c7
1 files 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);