2 * Copyright (c) 2017-2019 Cisco and/or its affiliates.
3 * Licensed under the Apache License, Version 2.0 (the "License");
4 * you may not use this file except in compliance with the License.
5 * You may obtain a copy of the License at:
7 * http://www.apache.org/licenses/LICENSE-2.0
9 * Unless required by applicable law or agreed to in writing, software
10 * distributed under the License is distributed on an "AS IS" BASIS,
11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 * See the License for the specific language governing permissions and
13 * limitations under the License.
16 #include <vnet/session/segment_manager.h>
17 #include <vnet/session/session.h>
18 #include <vnet/session/application.h>
20 typedef struct segment_manager_main_
22 segment_manager_t *segment_managers; /**< Pool of segment managers */
23 clib_valloc_main_t va_allocator; /**< Virtual address allocator */
24 u32 seg_name_counter; /**< Counter for segment names */
29 u32 default_fifo_size; /**< default rx/tx fifo size */
30 u32 default_segment_size; /**< default fifo segment size */
31 u32 default_app_mq_size; /**< default app msg q size */
32 } segment_manager_main_t;
34 static segment_manager_main_t sm_main;
36 #define segment_manager_foreach_segment_w_lock(VAR, SM, BODY) \
38 clib_rwlock_reader_lock (&(SM)->segments_rwlock); \
39 pool_foreach((VAR), ((SM)->segments), (BODY)); \
40 clib_rwlock_reader_unlock (&(SM)->segments_rwlock); \
43 static segment_manager_props_t *
44 segment_manager_properties_get (segment_manager_t * sm)
46 app_worker_t *app_wrk = app_worker_get (sm->app_wrk_index);
47 return application_get_segment_manager_properties (app_wrk->app_index);
50 segment_manager_props_t *
51 segment_manager_props_init (segment_manager_props_t * props)
53 props->add_segment_size = sm_main.default_segment_size;
54 props->rx_fifo_size = sm_main.default_fifo_size;
55 props->tx_fifo_size = sm_main.default_fifo_size;
56 props->evt_q_size = sm_main.default_app_mq_size;
61 segment_manager_app_detached (segment_manager_t * sm)
63 return (sm->app_wrk_index == SEGMENT_MANAGER_INVALID_APP_INDEX);
67 segment_manager_app_detach (segment_manager_t * sm)
69 sm->app_wrk_index = SEGMENT_MANAGER_INVALID_APP_INDEX;
73 segment_manager_segment_index (segment_manager_t * sm, fifo_segment_t * seg)
75 return (seg - sm->segments);
79 * Adds segment to segment manager's pool
81 * If needed a writer's lock is acquired before allocating a new segment
82 * to avoid affecting any of the segments pool readers.
85 segment_manager_add_segment (segment_manager_t * sm, u32 segment_size)
87 segment_manager_main_t *smm = &sm_main;
88 u32 rnd_margin = 128 << 10, fs_index = ~0, page_size;
89 uword baseva = (uword) ~ 0ULL, alloc_size;
90 segment_manager_props_t *props;
95 props = segment_manager_properties_get (sm);
97 /* Not configured for addition of new segments and not first */
98 if (!props->add_segment && !segment_size)
100 clib_warning ("cannot allocate new segment");
101 return VNET_API_ERROR_INVALID_VALUE;
105 * Allocate fifo segment and lock if needed
107 if (vlib_num_workers ())
108 clib_rwlock_writer_lock (&sm->segments_rwlock);
110 pool_get_zero (sm->segments, fs);
113 * Initialize ssvm segment and svm fifo private header
115 segment_size = segment_size ? segment_size : props->add_segment_size;
116 page_size = clib_mem_get_page_size ();
117 segment_size = (segment_size + page_size - 1) & ~(page_size - 1);
118 if (props->segment_type != SSVM_SEGMENT_PRIVATE)
120 seg_name = format (0, "%d-%d%c", getpid (), smm->seg_name_counter++, 0);
121 alloc_size = (uword) segment_size + rnd_margin;
122 baseva = clib_valloc_alloc (&smm->va_allocator, alloc_size, 0);
125 clib_warning ("out of space for segments");
126 pool_put (sm->segments, fs);
131 seg_name = format (0, "%s%c", "process-private-segment", 0);
133 fs->ssvm.ssvm_size = segment_size;
134 fs->ssvm.name = seg_name;
135 fs->ssvm.requested_va = baseva;
137 if ((rv = ssvm_master_init (&fs->ssvm, props->segment_type)))
139 clib_warning ("svm_master_init ('%v', %u) failed", seg_name,
142 if (props->segment_type != SSVM_SEGMENT_PRIVATE)
143 clib_valloc_free (&smm->va_allocator, baseva);
144 pool_put (sm->segments, fs);
148 fifo_segment_init (fs);
151 * Save segment index before dropping lock, if any held
153 fs_index = fs - sm->segments;
157 if (vlib_num_workers ())
158 clib_rwlock_writer_unlock (&sm->segments_rwlock);
164 * Remove segment without lock
167 segment_manager_del_segment (segment_manager_t * sm, fifo_segment_t * fs)
169 segment_manager_main_t *smm = &sm_main;
171 if (ssvm_type (&fs->ssvm) != SSVM_SEGMENT_PRIVATE)
173 clib_valloc_free (&smm->va_allocator, fs->ssvm.requested_va);
175 if (sm->app_wrk_index != SEGMENT_MANAGER_INVALID_APP_INDEX)
177 app_worker_t *app_wrk;
179 app_wrk = app_worker_get (sm->app_wrk_index);
180 segment_handle = segment_manager_segment_handle (sm, fs);
181 app_worker_del_segment_notify (app_wrk, segment_handle);
185 ssvm_delete (&fs->ssvm);
188 clib_memset (fs, 0xfb, sizeof (*fs));
189 pool_put (sm->segments, fs);
193 * Removes segment after acquiring writer lock
196 segment_manager_lock_and_del_segment (segment_manager_t * sm, u32 fs_index)
201 clib_rwlock_writer_lock (&sm->segments_rwlock);
202 fs = segment_manager_get_segment (sm, fs_index);
203 is_prealloc = fifo_segment_flags (fs) & FIFO_SEGMENT_F_IS_PREALLOCATED;
204 if (is_prealloc && !segment_manager_app_detached (sm))
206 clib_rwlock_writer_unlock (&sm->segments_rwlock);
210 segment_manager_del_segment (sm, fs);
211 clib_rwlock_writer_unlock (&sm->segments_rwlock);
215 * Reads a segment from the segment manager's pool without lock
218 segment_manager_get_segment (segment_manager_t * sm, u32 segment_index)
220 return pool_elt_at_index (sm->segments, segment_index);
224 segment_manager_segment_handle (segment_manager_t * sm,
225 fifo_segment_t * segment)
227 u32 segment_index = segment_manager_segment_index (sm, segment);
228 return (((u64) segment_manager_index (sm) << 32) | segment_index);
232 segment_manager_parse_segment_handle (u64 segment_handle, u32 * sm_index,
235 *sm_index = segment_handle >> 32;
236 *segment_index = segment_handle & 0xFFFFFFFF;
240 segment_manager_make_segment_handle (u32 segment_manager_index,
243 return (((u64) segment_manager_index << 32) | segment_index);
247 segment_manager_get_segment_w_handle (u64 segment_handle)
249 u32 sm_index, segment_index;
250 segment_manager_t *sm;
252 segment_manager_parse_segment_handle (segment_handle, &sm_index,
254 sm = segment_manager_get (sm_index);
255 if (!sm || pool_is_free_index (sm->segments, segment_index))
257 return pool_elt_at_index (sm->segments, segment_index);
261 * Reads a segment from the segment manager's pool and acquires reader lock
263 * Caller must drop the reader's lock by calling
264 * @ref segment_manager_segment_reader_unlock once it finishes working with
268 segment_manager_get_segment_w_lock (segment_manager_t * sm, u32 segment_index)
270 clib_rwlock_reader_lock (&sm->segments_rwlock);
271 return pool_elt_at_index (sm->segments, segment_index);
275 segment_manager_segment_reader_unlock (segment_manager_t * sm)
277 ASSERT (sm->segments_rwlock->n_readers > 0);
278 clib_rwlock_reader_unlock (&sm->segments_rwlock);
282 segment_manager_segment_writer_unlock (segment_manager_t * sm)
284 clib_rwlock_writer_unlock (&sm->segments_rwlock);
288 segment_manager_alloc (void)
290 segment_manager_main_t *smm = &sm_main;
291 segment_manager_t *sm;
293 pool_get_zero (smm->segment_managers, sm);
294 clib_rwlock_init (&sm->segments_rwlock);
299 * Initializes segment manager based on options provided.
300 * Returns error if ssvm segment(s) allocation fails.
303 segment_manager_init (segment_manager_t * sm, u32 first_seg_size,
304 u32 prealloc_fifo_pairs)
306 u32 rx_fifo_size, tx_fifo_size, pair_size;
307 u32 rx_rounded_data_size, tx_rounded_data_size;
308 u64 approx_total_size, max_seg_size = ((u64) 1 << 32) - (128 << 10);
309 segment_manager_props_t *props;
310 fifo_segment_t *segment;
311 u32 approx_segment_count;
314 props = segment_manager_properties_get (sm);
315 first_seg_size = clib_max (first_seg_size, sm_main.default_segment_size);
317 if (prealloc_fifo_pairs)
319 /* Figure out how many segments should be preallocated */
320 rx_rounded_data_size = (1 << (max_log2 (props->rx_fifo_size)));
321 tx_rounded_data_size = (1 << (max_log2 (props->tx_fifo_size)));
323 rx_fifo_size = sizeof (svm_fifo_t) + rx_rounded_data_size;
324 tx_fifo_size = sizeof (svm_fifo_t) + tx_rounded_data_size;
325 pair_size = rx_fifo_size + tx_fifo_size;
327 approx_total_size = (u64) prealloc_fifo_pairs *pair_size;
328 if (first_seg_size > approx_total_size)
329 max_seg_size = first_seg_size;
330 approx_segment_count = (approx_total_size + (max_seg_size - 1))
333 /* Allocate the segments */
334 for (i = 0; i < approx_segment_count + 1; i++)
336 seg_index = segment_manager_add_segment (sm, max_seg_size);
339 clib_warning ("Failed to preallocate segment %d", i);
343 segment = segment_manager_get_segment (sm, seg_index);
345 sm->event_queue = segment_manager_alloc_queue (segment, props);
347 fifo_segment_preallocate_fifo_pairs (segment,
350 &prealloc_fifo_pairs);
351 fifo_segment_flags (segment) = FIFO_SEGMENT_F_IS_PREALLOCATED;
352 if (prealloc_fifo_pairs == 0)
358 seg_index = segment_manager_add_segment (sm, first_seg_size);
361 clib_warning ("Failed to allocate segment");
364 segment = segment_manager_get_segment (sm, seg_index);
365 sm->event_queue = segment_manager_alloc_queue (segment, props);
372 * Cleanup segment manager.
375 segment_manager_free (segment_manager_t * sm)
377 segment_manager_main_t *smm = &sm_main;
378 fifo_segment_t *fifo_segment;
380 ASSERT (!segment_manager_has_fifos (sm)
381 && segment_manager_app_detached (sm));
383 /* If we have empty preallocated segments that haven't been removed, remove
384 * them now. Apart from that, the first segment in the first segment manager
385 * is not removed when all fifos are removed. It can only be removed when
386 * the manager is explicitly deleted/detached by the app. */
387 clib_rwlock_writer_lock (&sm->segments_rwlock);
390 pool_foreach (fifo_segment, sm->segments, ({
391 segment_manager_del_segment (sm, fifo_segment);
395 clib_rwlock_writer_unlock (&sm->segments_rwlock);
397 clib_rwlock_free (&sm->segments_rwlock);
399 clib_memset (sm, 0xfe, sizeof (*sm));
400 pool_put (smm->segment_managers, sm);
404 segment_manager_init_free (segment_manager_t * sm)
406 segment_manager_app_detach (sm);
407 if (segment_manager_has_fifos (sm))
408 segment_manager_del_sessions (sm);
411 ASSERT (!sm->first_is_protected || segment_manager_app_detached (sm));
412 segment_manager_free (sm);
417 segment_manager_get (u32 index)
419 return pool_elt_at_index (sm_main.segment_managers, index);
423 segment_manager_get_if_valid (u32 index)
425 if (pool_is_free_index (sm_main.segment_managers, index))
427 return pool_elt_at_index (sm_main.segment_managers, index);
431 segment_manager_index (segment_manager_t * sm)
433 return sm - sm_main.segment_managers;
437 segment_manager_has_fifos (segment_manager_t * sm)
443 segment_manager_foreach_segment_w_lock (seg, sm, ({
444 if (CLIB_DEBUG && !first && !fifo_segment_has_fifos (seg)
445 && !(fifo_segment_flags (seg) & FIFO_SEGMENT_F_IS_PREALLOCATED))
447 clib_warning ("segment %d has no fifos!",
448 segment_manager_segment_index (sm, seg));
451 if (fifo_segment_has_fifos (seg))
453 segment_manager_segment_reader_unlock (sm);
463 * Initiate disconnects for all sessions 'owned' by a segment manager
466 segment_manager_del_sessions (segment_manager_t * sm)
468 fifo_segment_t *fifo_segment;
469 session_handle_t *handles = 0, *handle;
473 ASSERT (pool_elts (sm->segments) != 0);
475 /* Across all fifo segments used by the server */
477 segment_manager_foreach_segment_w_lock (fifo_segment, sm, ({
478 fifo = fifo_segment_get_fifo_list (fifo_segment);
481 * Remove any residual sessions from the session lookup table
482 * Don't bother deleting the individual fifos, we're going to
483 * throw away the fifo segment in a minute.
487 session = session_get_if_valid (fifo->master_session_index,
488 fifo->master_thread_index);
490 vec_add1 (handles, session_handle (session));
494 /* Instead of removing the segment, test when cleaning up disconnected
495 * sessions if the segment can be removed.
500 vec_foreach (handle, handles)
501 session_close (session_get_from_handle (*handle));
505 segment_manager_try_alloc_fifos (fifo_segment_t * fifo_segment,
506 u32 rx_fifo_size, u32 tx_fifo_size,
507 svm_fifo_t ** rx_fifo, svm_fifo_t ** tx_fifo)
509 rx_fifo_size = clib_max (rx_fifo_size, sm_main.default_fifo_size);
510 *rx_fifo = fifo_segment_alloc_fifo (fifo_segment, rx_fifo_size,
511 FIFO_SEGMENT_RX_FIFO);
513 tx_fifo_size = clib_max (tx_fifo_size, sm_main.default_fifo_size);
514 *tx_fifo = fifo_segment_alloc_fifo (fifo_segment, tx_fifo_size,
515 FIFO_SEGMENT_TX_FIFO);
519 /* This would be very odd, but handle it... */
522 fifo_segment_free_fifo (fifo_segment, *tx_fifo);
531 fifo_segment_free_fifo (fifo_segment, *rx_fifo);
541 segment_manager_alloc_session_fifos (segment_manager_t * sm,
542 svm_fifo_t ** rx_fifo,
543 svm_fifo_t ** tx_fifo)
545 int alloc_fail = 1, rv = 0, new_fs_index;
546 segment_manager_props_t *props;
547 fifo_segment_t *fs = 0;
548 u32 sm_index, fs_index;
549 u8 added_a_segment = 0;
552 props = segment_manager_properties_get (sm);
555 * Find the first free segment to allocate the fifos in
559 segment_manager_foreach_segment_w_lock (fs, sm, ({
560 alloc_fail = segment_manager_try_alloc_fifos (fs,
564 /* Exit with lock held, drop it after notifying app */
577 ASSERT (rx_fifo && tx_fifo);
578 sm_index = segment_manager_index (sm);
579 fs_index = segment_manager_segment_index (sm, fs);
580 (*tx_fifo)->segment_manager = sm_index;
581 (*rx_fifo)->segment_manager = sm_index;
582 (*tx_fifo)->segment_index = fs_index;
583 (*rx_fifo)->segment_index = fs_index;
587 app_worker_t *app_wrk;
588 fs_handle = segment_manager_segment_handle (sm, fs);
589 app_wrk = app_worker_get (sm->app_wrk_index);
590 rv = app_worker_add_segment_notify (app_wrk, fs_handle);
592 /* Drop the lock after app is notified */
593 segment_manager_segment_reader_unlock (sm);
598 * Allocation failed, see if we can add a new segment
600 if (props->add_segment)
604 clib_warning ("Added a segment, still can't allocate a fifo");
605 segment_manager_segment_reader_unlock (sm);
606 return SESSION_ERROR_NEW_SEG_NO_SPACE;
608 if ((new_fs_index = segment_manager_add_segment (sm, 0)) < 0)
610 clib_warning ("Failed to add new segment");
611 return SESSION_ERROR_SEG_CREATE;
613 fs = segment_manager_get_segment_w_lock (sm, new_fs_index);
614 alloc_fail = segment_manager_try_alloc_fifos (fs, props->rx_fifo_size,
622 clib_warning ("Can't add new seg and no space to allocate fifos!");
623 return SESSION_ERROR_NO_SPACE;
628 segment_manager_dealloc_fifos (svm_fifo_t * rx_fifo, svm_fifo_t * tx_fifo)
630 segment_manager_t *sm;
634 if (!rx_fifo || !tx_fifo)
637 /* It's possible to have no segment manager if the session was removed
638 * as result of a detach. */
639 if (!(sm = segment_manager_get_if_valid (rx_fifo->segment_manager)))
642 segment_index = rx_fifo->segment_index;
643 fs = segment_manager_get_segment_w_lock (sm, segment_index);
644 fifo_segment_free_fifo (fs, rx_fifo);
645 fifo_segment_free_fifo (fs, tx_fifo);
648 * Try to remove svm segment if it has no fifos. This can be done only if
649 * the segment is not the first in the segment manager or if it is first
650 * and it is not protected. Moreover, if the segment is first and the app
651 * has detached from the segment manager, remove the segment manager.
653 if (!fifo_segment_has_fifos (fs))
655 segment_manager_segment_reader_unlock (sm);
657 /* Remove segment if it holds no fifos or first but not protected */
658 if (segment_index != 0 || !sm->first_is_protected)
659 segment_manager_lock_and_del_segment (sm, segment_index);
661 /* Remove segment manager if no sessions and detached from app */
662 if (segment_manager_app_detached (sm)
663 && !segment_manager_has_fifos (sm))
665 segment_manager_free (sm);
669 segment_manager_segment_reader_unlock (sm);
673 segment_manager_grow_fifo (segment_manager_t * sm, svm_fifo_t * f, u32 size)
678 fs = segment_manager_get_segment_w_lock (sm, f->segment_index);
679 rv = fifo_segment_grow_fifo (fs, f, size);
680 segment_manager_segment_reader_unlock (sm);
686 segment_manager_collect_fifo_chunks (segment_manager_t * sm, svm_fifo_t * f)
691 fs = segment_manager_get_segment_w_lock (sm, f->segment_index);
692 rv = fifo_segment_collect_fifo_chunks (fs, f);
693 segment_manager_segment_reader_unlock (sm);
699 segment_manager_shrink_fifo (segment_manager_t * sm, svm_fifo_t * f, u32 size,
704 rv = svm_fifo_reduce_size (f, size, is_producer);
706 /* Nothing to collect at this point */
710 if (f->flags & SVM_FIFO_F_COLLECT_CHUNKS)
711 segment_manager_collect_fifo_chunks (sm, f);
717 segment_manager_evt_q_expected_size (u32 q_len)
719 u32 fifo_evt_size, notif_q_size, q_hdrs;
720 u32 msg_q_sz, fifo_evt_ring_sz, session_ntf_ring_sz;
722 fifo_evt_size = 1 << max_log2 (sizeof (session_event_t));
723 notif_q_size = clib_max (16, q_len >> 4);
725 msg_q_sz = q_len * sizeof (svm_msg_q_msg_t);
726 fifo_evt_ring_sz = q_len * fifo_evt_size;
727 session_ntf_ring_sz = notif_q_size * 256;
728 q_hdrs = sizeof (svm_queue_t) + sizeof (svm_msg_q_t);
730 return (msg_q_sz + fifo_evt_ring_sz + session_ntf_ring_sz + q_hdrs);
734 * Allocates shm queue in the first segment
736 * Must be called with lock held
739 segment_manager_alloc_queue (fifo_segment_t * segment,
740 segment_manager_props_t * props)
742 u32 fifo_evt_size, session_evt_size = 256, notif_q_size;
743 svm_msg_q_cfg_t _cfg, *cfg = &_cfg;
747 fifo_evt_size = sizeof (session_event_t);
748 notif_q_size = clib_max (16, props->evt_q_size >> 4);
750 svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = {
751 {props->evt_q_size, fifo_evt_size, 0},
752 {notif_q_size, session_evt_size, 0}
755 cfg->consumer_pid = 0;
757 cfg->q_nitems = props->evt_q_size;
760 oldheap = ssvm_push_heap (segment->ssvm.sh);
761 q = svm_msg_q_alloc (cfg);
762 ssvm_pop_heap (oldheap);
764 if (props->use_mq_eventfd)
766 if (svm_msg_q_alloc_producer_eventfd (q))
767 clib_warning ("failed to alloc eventfd");
773 segment_manager_event_queue (segment_manager_t * sm)
775 return sm->event_queue;
779 * Frees shm queue allocated in the first segment
782 segment_manager_dealloc_queue (segment_manager_t * sm, svm_queue_t * q)
784 fifo_segment_t *segment;
785 ssvm_shared_header_t *sh;
788 ASSERT (!pool_is_free_index (sm->segments, 0));
790 segment = segment_manager_get_segment_w_lock (sm, 0);
791 sh = segment->ssvm.sh;
793 oldheap = ssvm_push_heap (sh);
795 ssvm_pop_heap (oldheap);
796 segment_manager_segment_reader_unlock (sm);
800 * Init segment vm address allocator
803 segment_manager_main_init (segment_manager_main_init_args_t * a)
805 segment_manager_main_t *sm = &sm_main;
806 clib_valloc_chunk_t _ip, *ip = &_ip;
808 ip->baseva = a->baseva;
811 clib_valloc_init (&sm->va_allocator, ip, 1 /* lock */ );
813 sm->default_fifo_size = 1 << 12;
814 sm->default_segment_size = 1 << 20;
815 sm->default_app_mq_size = 128;
818 static clib_error_t *
819 segment_manager_show_fn (vlib_main_t * vm, unformat_input_t * input,
820 vlib_cli_command_t * cmd)
822 segment_manager_main_t *smm = &sm_main;
824 segment_manager_t *sm;
825 u8 show_segments = 0, verbose = 0;
831 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
833 if (unformat (input, "segments"))
835 else if (unformat (input, "verbose"))
838 return clib_error_return (0, "unknown input `%U'",
839 format_unformat_error, input);
841 vlib_cli_output (vm, "%d segment managers allocated",
842 pool_elts (smm->segment_managers));
843 if (verbose && pool_elts (smm->segment_managers))
845 vlib_cli_output (vm, "%-10s%=15s%=12s", "Index", "App Index",
849 pool_foreach (sm, smm->segment_managers, ({
850 vlib_cli_output (vm, "%-10d%=15d%=12d", segment_manager_index (sm),
851 sm->app_wrk_index, pool_elts (sm->segments));
858 vlib_cli_output (vm, "%-15s%15s%15s%15s%15s%15s", "Name", "Type",
859 "HeapSize (M)", "ActiveFifos", "FreeFifos", "Address");
862 pool_foreach (sm, smm->segment_managers, ({
863 segment_manager_foreach_segment_w_lock (seg, sm, ({
864 fifo_segment_info (seg, &address, &size);
865 active_fifos = fifo_segment_num_fifos (seg);
866 free_fifos = fifo_segment_num_free_fifos (seg, ~0 /* size */);
867 vlib_cli_output (vm, "%-15v%15U%15llu%15u%15u%15llx",
868 ssvm_name (&seg->ssvm), format_fifo_segment_type,
869 seg, size >> 20ULL, active_fifos, free_fifos,
872 vlib_cli_output (vm, "%U", format_fifo_segment, seg, verbose);
882 VLIB_CLI_COMMAND (segment_manager_show_command, static) =
884 .path = "show segment-manager",
885 .short_help = "show segment-manager [segments][verbose]",
886 .function = segment_manager_show_fn,
891 segment_manager_format_sessions (segment_manager_t * sm, int verbose)
893 fifo_segment_t *fifo_segment;
894 vlib_main_t *vm = vlib_get_main ();
895 app_worker_t *app_wrk;
902 vlib_cli_output (vm, "%-40s%-20s%-15s%-10s", "Connection", "App",
903 "API Client", "SegManager");
905 vlib_cli_output (vm, "%-40s%-20s", "Connection", "App");
909 app_wrk = app_worker_get (sm->app_wrk_index);
910 app_name = application_name_from_index (app_wrk->app_index);
912 clib_rwlock_reader_lock (&sm->segments_rwlock);
915 pool_foreach (fifo_segment, sm->segments, ({
919 fifo = fifo_segment_get_fifo_list (fifo_segment);
922 u32 session_index, thread_index;
925 session_index = fifo->master_session_index;
926 thread_index = fifo->master_thread_index;
928 session = session_get (session_index, thread_index);
929 str = format (0, "%U", format_session, session, verbose);
932 s = format (s, "%-40s%-20s%-15u%-10u", str, app_name,
933 app_wrk->api_client_index, app_wrk->connects_seg_manager);
935 s = format (s, "%-40s%-20s", str, app_name);
937 vlib_cli_output (vm, "%v", s);
938 vec_reset_length (s);
947 clib_rwlock_reader_unlock (&sm->segments_rwlock);
951 * fd.io coding-style-patch-verification: ON
954 * eval: (c-set-style "gnu")