From 993683150202254c6ba8dd43e087a7229edd5d4c Mon Sep 17 00:00:00 2001 From: Florin Coras Date: Thu, 2 Aug 2018 10:45:44 -0700 Subject: vcl: support for eventfd mq signaling - support eventfd based mq signaling. Based on configuration, vcl epoll/select can use either condvars or epoll on mq eventfds. - add vcl support for memfd segments - vpp explicitly registers cut-through segments with apps/vcl - if using eventfd, make ldp allow one call to libc_epoll_create. Needed for the message queue epfd - update svm_queue_t to allow blocking calls with eventfd signaling. Change-Id: I064151ac370bbe29bb16c968bf4e3659c8286bea Signed-off-by: Florin Coras --- src/vnet/session/segment_manager.c | 22 +++++++++++++--------- 1 file changed, 13 insertions(+), 9 deletions(-) (limited to 'src/vnet/session/segment_manager.c') diff --git a/src/vnet/session/segment_manager.c b/src/vnet/session/segment_manager.c index c7d2482d6bf..6f149ad9412 100644 --- a/src/vnet/session/segment_manager.c +++ b/src/vnet/session/segment_manager.c @@ -88,7 +88,7 @@ segment_manager_del_segment (segment_manager_t * sm, /** * Removes segment after acquiring writer lock */ -always_inline void +static inline void segment_manager_lock_and_del_segment (segment_manager_t * sm, u32 fs_index) { svm_fifo_segment_private_t *fs; @@ -290,8 +290,7 @@ segment_manager_init (segment_manager_t * sm, u32 first_seg_size, segment = segment_manager_get_segment (sm, seg_index); if (i == 0) - sm->event_queue = segment_manager_alloc_queue (segment, - props->evt_q_size); + sm->event_queue = segment_manager_alloc_queue (segment, props); svm_fifo_segment_preallocate_fifo_pairs (segment, props->rx_fifo_size, @@ -311,8 +310,7 @@ segment_manager_init (segment_manager_t * sm, u32 first_seg_size, return seg_index; } segment = segment_manager_get_segment (sm, seg_index); - sm->event_queue = segment_manager_alloc_queue (segment, - props->evt_q_size); + sm->event_queue = segment_manager_alloc_queue (segment, props); } return 0; @@ -623,7 +621,7 @@ segment_manager_evt_q_expected_size (u32 q_len) */ svm_msg_q_t * segment_manager_alloc_queue (svm_fifo_segment_private_t * segment, - u32 queue_size) + segment_manager_properties_t * props) { u32 fifo_evt_size, session_evt_size = 256, notif_q_size; svm_msg_q_cfg_t _cfg, *cfg = &_cfg; @@ -631,21 +629,27 @@ segment_manager_alloc_queue (svm_fifo_segment_private_t * segment, void *oldheap; fifo_evt_size = sizeof (session_event_t); - notif_q_size = clib_max (16, queue_size >> 4); + notif_q_size = clib_max (16, props->evt_q_size >> 4); /* *INDENT-OFF* */ svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = { - {queue_size, fifo_evt_size, 0}, + {props->evt_q_size, fifo_evt_size, 0}, {notif_q_size, session_evt_size, 0} }; /* *INDENT-ON* */ cfg->consumer_pid = 0; cfg->n_rings = 2; - cfg->q_nitems = queue_size; + cfg->q_nitems = props->evt_q_size; cfg->ring_cfgs = rc; oldheap = ssvm_push_heap (segment->ssvm.sh); q = svm_msg_q_alloc (cfg); ssvm_pop_heap (oldheap); + + if (props->use_mq_eventfd) + { + if (svm_msg_q_alloc_producer_eventfd (q)) + clib_warning ("failed to alloc eventfd"); + } return q; } -- cgit 1.2.3-korg