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 u8 default_high_watermark; /**< default high watermark % */
33 u8 default_low_watermark; /**< default low watermark % */
34 } segment_manager_main_t;
36 static segment_manager_main_t sm_main;
38 #define segment_manager_foreach_segment_w_lock(VAR, SM, BODY) \
40 clib_rwlock_reader_lock (&(SM)->segments_rwlock); \
41 pool_foreach((VAR), ((SM)->segments), (BODY)); \
42 clib_rwlock_reader_unlock (&(SM)->segments_rwlock); \
45 static segment_manager_props_t *
46 segment_manager_properties_get (segment_manager_t * sm)
48 app_worker_t *app_wrk = app_worker_get (sm->app_wrk_index);
49 return application_get_segment_manager_properties (app_wrk->app_index);
52 segment_manager_props_t *
53 segment_manager_props_init (segment_manager_props_t * props)
55 props->add_segment_size = sm_main.default_segment_size;
56 props->rx_fifo_size = sm_main.default_fifo_size;
57 props->tx_fifo_size = sm_main.default_fifo_size;
58 props->evt_q_size = sm_main.default_app_mq_size;
59 props->high_watermark = sm_main.default_high_watermark;
60 props->low_watermark = sm_main.default_low_watermark;
61 props->n_slices = vlib_num_workers () + 1;
66 segment_manager_app_detached (segment_manager_t * sm)
68 return (sm->app_wrk_index == SEGMENT_MANAGER_INVALID_APP_INDEX);
72 segment_manager_app_detach (segment_manager_t * sm)
74 sm->app_wrk_index = SEGMENT_MANAGER_INVALID_APP_INDEX;
78 segment_manager_segment_index (segment_manager_t * sm, fifo_segment_t * seg)
80 return (seg - sm->segments);
84 * Adds segment to segment manager's pool
86 * If needed a writer's lock is acquired before allocating a new segment
87 * to avoid affecting any of the segments pool readers.
90 segment_manager_add_segment (segment_manager_t * sm, uword segment_size)
92 uword baseva = (uword) ~ 0ULL, alloc_size, page_size;
93 u32 rnd_margin = 128 << 10, fs_index = ~0;
94 segment_manager_main_t *smm = &sm_main;
95 segment_manager_props_t *props;
100 props = segment_manager_properties_get (sm);
102 /* Not configured for addition of new segments and not first */
103 if (!props->add_segment && !segment_size)
105 clib_warning ("cannot allocate new segment");
106 return VNET_API_ERROR_INVALID_VALUE;
110 * Allocate fifo segment and grab lock if needed
112 if (vlib_num_workers ())
113 clib_rwlock_writer_lock (&sm->segments_rwlock);
115 pool_get_zero (sm->segments, fs);
118 * Allocate ssvm segment
120 segment_size = segment_size ? segment_size : props->add_segment_size;
121 page_size = clib_mem_get_page_size ();
122 /* Protect against segment size u32 wrap */
123 segment_size = clib_max (segment_size + page_size - 1, segment_size);
124 segment_size = segment_size & ~(page_size - 1);
126 if (props->segment_type != SSVM_SEGMENT_PRIVATE)
128 seg_name = format (0, "%d-%d%c", getpid (), smm->seg_name_counter++, 0);
129 alloc_size = (uword) segment_size + rnd_margin;
130 baseva = clib_valloc_alloc (&smm->va_allocator, alloc_size, 0);
133 clib_warning ("out of space for segments");
134 pool_put (sm->segments, fs);
139 seg_name = format (0, "%s%c", "process-private", 0);
141 fs->ssvm.ssvm_size = segment_size;
142 fs->ssvm.name = seg_name;
143 fs->ssvm.requested_va = baseva;
145 if ((rv = ssvm_master_init (&fs->ssvm, props->segment_type)))
147 clib_warning ("svm_master_init ('%v', %u) failed", seg_name,
150 if (props->segment_type != SSVM_SEGMENT_PRIVATE)
151 clib_valloc_free (&smm->va_allocator, baseva);
152 pool_put (sm->segments, fs);
157 * Initialize fifo segment
159 fs->n_slices = props->n_slices;
160 fifo_segment_init (fs);
163 * Save segment index before dropping lock, if any held
165 fs_index = fs - sm->segments;
168 * Set watermarks in segment
170 fs->h->high_watermark = sm->high_watermark;
171 fs->h->low_watermark = sm->low_watermark;
172 fs->h->flags &= ~FIFO_SEGMENT_F_MEM_LIMIT;
176 if (vlib_num_workers ())
177 clib_rwlock_writer_unlock (&sm->segments_rwlock);
183 * Remove segment without lock
186 segment_manager_del_segment (segment_manager_t * sm, fifo_segment_t * fs)
188 segment_manager_main_t *smm = &sm_main;
190 if (ssvm_type (&fs->ssvm) != SSVM_SEGMENT_PRIVATE)
192 clib_valloc_free (&smm->va_allocator, fs->ssvm.requested_va);
194 if (sm->app_wrk_index != SEGMENT_MANAGER_INVALID_APP_INDEX)
196 app_worker_t *app_wrk;
198 app_wrk = app_worker_get (sm->app_wrk_index);
199 segment_handle = segment_manager_segment_handle (sm, fs);
200 app_worker_del_segment_notify (app_wrk, segment_handle);
204 ssvm_delete (&fs->ssvm);
207 clib_memset (fs, 0xfb, sizeof (*fs));
208 pool_put (sm->segments, fs);
212 * Removes segment after acquiring writer lock
215 segment_manager_lock_and_del_segment (segment_manager_t * sm, u32 fs_index)
220 clib_rwlock_writer_lock (&sm->segments_rwlock);
221 fs = segment_manager_get_segment (sm, fs_index);
222 is_prealloc = fifo_segment_flags (fs) & FIFO_SEGMENT_F_IS_PREALLOCATED;
223 if (is_prealloc && !segment_manager_app_detached (sm))
225 clib_rwlock_writer_unlock (&sm->segments_rwlock);
229 segment_manager_del_segment (sm, fs);
230 clib_rwlock_writer_unlock (&sm->segments_rwlock);
234 * Reads a segment from the segment manager's pool without lock
237 segment_manager_get_segment (segment_manager_t * sm, u32 segment_index)
239 return pool_elt_at_index (sm->segments, segment_index);
243 segment_manager_segment_handle (segment_manager_t * sm,
244 fifo_segment_t * segment)
246 u32 segment_index = segment_manager_segment_index (sm, segment);
247 return (((u64) segment_manager_index (sm) << 32) | segment_index);
251 segment_manager_parse_segment_handle (u64 segment_handle, u32 * sm_index,
254 *sm_index = segment_handle >> 32;
255 *segment_index = segment_handle & 0xFFFFFFFF;
259 segment_manager_make_segment_handle (u32 segment_manager_index,
262 return (((u64) segment_manager_index << 32) | segment_index);
266 segment_manager_get_segment_w_handle (u64 segment_handle)
268 u32 sm_index, segment_index;
269 segment_manager_t *sm;
271 segment_manager_parse_segment_handle (segment_handle, &sm_index,
273 sm = segment_manager_get (sm_index);
274 if (!sm || pool_is_free_index (sm->segments, segment_index))
276 return pool_elt_at_index (sm->segments, segment_index);
280 * Reads a segment from the segment manager's pool and acquires reader lock
282 * Caller must drop the reader's lock by calling
283 * @ref segment_manager_segment_reader_unlock once it finishes working with
287 segment_manager_get_segment_w_lock (segment_manager_t * sm, u32 segment_index)
289 clib_rwlock_reader_lock (&sm->segments_rwlock);
290 return pool_elt_at_index (sm->segments, segment_index);
294 segment_manager_segment_reader_unlock (segment_manager_t * sm)
296 clib_rwlock_reader_unlock (&sm->segments_rwlock);
300 segment_manager_segment_writer_unlock (segment_manager_t * sm)
302 clib_rwlock_writer_unlock (&sm->segments_rwlock);
306 segment_manager_alloc (void)
308 segment_manager_main_t *smm = &sm_main;
309 segment_manager_t *sm;
311 pool_get_zero (smm->segment_managers, sm);
312 clib_rwlock_init (&sm->segments_rwlock);
317 * Initializes segment manager based on options provided.
318 * Returns error if ssvm segment(s) allocation fails.
321 segment_manager_init (segment_manager_t * sm)
323 u32 rx_fifo_size, tx_fifo_size, pair_size;
324 u32 rx_rounded_data_size, tx_rounded_data_size;
325 uword first_seg_size;
326 u32 prealloc_fifo_pairs;
327 u64 approx_total_size, max_seg_size = ((u64) 1 << 32) - (128 << 10);
328 segment_manager_props_t *props;
329 fifo_segment_t *segment;
330 u32 approx_segment_count;
333 props = segment_manager_properties_get (sm);
334 first_seg_size = clib_max (props->segment_size,
335 sm_main.default_segment_size);
336 prealloc_fifo_pairs = props->prealloc_fifos;
338 segment_manager_set_watermarks (sm,
339 props->high_watermark,
340 props->low_watermark);
342 if (prealloc_fifo_pairs)
344 /* Figure out how many segments should be preallocated */
345 rx_rounded_data_size = (1 << (max_log2 (props->rx_fifo_size)));
346 tx_rounded_data_size = (1 << (max_log2 (props->tx_fifo_size)));
348 rx_fifo_size = sizeof (svm_fifo_t) + rx_rounded_data_size;
349 tx_fifo_size = sizeof (svm_fifo_t) + tx_rounded_data_size;
350 pair_size = rx_fifo_size + tx_fifo_size;
352 approx_total_size = (u64) prealloc_fifo_pairs *pair_size;
353 if (first_seg_size > approx_total_size)
354 max_seg_size = first_seg_size;
355 approx_segment_count = (approx_total_size + (max_seg_size - 1))
358 /* Allocate the segments */
359 for (i = 0; i < approx_segment_count + 1; i++)
361 seg_index = segment_manager_add_segment (sm, max_seg_size);
364 clib_warning ("Failed to preallocate segment %d", i);
368 segment = segment_manager_get_segment (sm, seg_index);
370 sm->event_queue = segment_manager_alloc_queue (segment, props);
372 fifo_segment_preallocate_fifo_pairs (segment,
375 &prealloc_fifo_pairs);
376 fifo_segment_flags (segment) = FIFO_SEGMENT_F_IS_PREALLOCATED;
377 if (prealloc_fifo_pairs == 0)
383 seg_index = segment_manager_add_segment (sm, first_seg_size);
386 clib_warning ("Failed to allocate segment");
389 segment = segment_manager_get_segment (sm, seg_index);
390 sm->event_queue = segment_manager_alloc_queue (segment, props);
397 * Cleanup segment manager.
400 segment_manager_free (segment_manager_t * sm)
402 segment_manager_main_t *smm = &sm_main;
403 fifo_segment_t *fifo_segment;
405 ASSERT (!segment_manager_has_fifos (sm)
406 && segment_manager_app_detached (sm));
408 /* If we have empty preallocated segments that haven't been removed, remove
409 * them now. Apart from that, the first segment in the first segment manager
410 * is not removed when all fifos are removed. It can only be removed when
411 * the manager is explicitly deleted/detached by the app. */
412 clib_rwlock_writer_lock (&sm->segments_rwlock);
415 pool_foreach (fifo_segment, sm->segments, ({
416 segment_manager_del_segment (sm, fifo_segment);
420 clib_rwlock_writer_unlock (&sm->segments_rwlock);
422 clib_rwlock_free (&sm->segments_rwlock);
424 clib_memset (sm, 0xfe, sizeof (*sm));
425 pool_put (smm->segment_managers, sm);
429 segment_manager_init_free (segment_manager_t * sm)
431 segment_manager_app_detach (sm);
432 if (segment_manager_has_fifos (sm))
433 segment_manager_del_sessions (sm);
436 ASSERT (!sm->first_is_protected || segment_manager_app_detached (sm));
437 segment_manager_free (sm);
442 segment_manager_get (u32 index)
444 return pool_elt_at_index (sm_main.segment_managers, index);
448 segment_manager_get_if_valid (u32 index)
450 if (pool_is_free_index (sm_main.segment_managers, index))
452 return pool_elt_at_index (sm_main.segment_managers, index);
455 static fifo_segment_t *
456 find_max_free_segment (segment_manager_t * sm, u32 thread_index)
458 fifo_segment_t *cur, *fs = 0;
459 uword free_bytes, max_free_bytes = 0;
461 clib_rwlock_reader_lock (&sm->segments_rwlock);
463 pool_foreach (cur, sm->segments, ({
464 if ((free_bytes = fifo_segment_free_bytes (cur)) > max_free_bytes)
466 max_free_bytes = free_bytes;
471 clib_rwlock_reader_unlock (&sm->segments_rwlock);
477 segment_manager_index (segment_manager_t * sm)
479 return sm - sm_main.segment_managers;
483 segment_manager_has_fifos (segment_manager_t * sm)
489 segment_manager_foreach_segment_w_lock (seg, sm, ({
490 if (CLIB_DEBUG && !first && !fifo_segment_has_fifos (seg)
491 && !(fifo_segment_flags (seg) & FIFO_SEGMENT_F_IS_PREALLOCATED))
493 clib_warning ("segment %d has no fifos!",
494 segment_manager_segment_index (sm, seg));
497 if (fifo_segment_has_fifos (seg))
499 segment_manager_segment_reader_unlock (sm);
509 * Initiate disconnects for all sessions 'owned' by a segment manager
512 segment_manager_del_sessions (segment_manager_t * sm)
514 session_handle_t *handles = 0, *handle;
520 ASSERT (pool_elts (sm->segments) != 0);
522 /* Across all fifo segments used by the server */
524 segment_manager_foreach_segment_w_lock (fs, sm, ({
525 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
527 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
530 * Remove any residual sessions from the session lookup table
531 * Don't bother deleting the individual fifos, we're going to
532 * throw away the fifo segment in a minute.
536 session = session_get_if_valid (f->master_session_index,
537 f->master_thread_index);
539 vec_add1 (handles, session_handle (session));
544 /* Instead of removing the segment, test when cleaning up disconnected
545 * sessions if the segment can be removed.
550 vec_foreach (handle, handles)
551 session_close (session_get_from_handle (*handle));
555 segment_manager_try_alloc_fifos (fifo_segment_t * fifo_segment,
557 u32 rx_fifo_size, u32 tx_fifo_size,
558 svm_fifo_t ** rx_fifo, svm_fifo_t ** tx_fifo)
560 rx_fifo_size = clib_max (rx_fifo_size, sm_main.default_fifo_size);
561 *rx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
563 FIFO_SEGMENT_RX_FIFO);
565 tx_fifo_size = clib_max (tx_fifo_size, sm_main.default_fifo_size);
566 *tx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
568 FIFO_SEGMENT_TX_FIFO);
572 /* This would be very odd, but handle it... */
575 fifo_segment_free_fifo (fifo_segment, *tx_fifo);
584 fifo_segment_free_fifo (fifo_segment, *rx_fifo);
594 segment_manager_alloc_session_fifos (segment_manager_t * sm,
596 svm_fifo_t ** rx_fifo,
597 svm_fifo_t ** tx_fifo)
599 int alloc_fail = 1, rv = 0, new_fs_index;
600 segment_manager_props_t *props;
601 fifo_segment_t *fs = 0;
602 u32 sm_index, fs_index;
603 u8 added_a_segment = 0;
606 props = segment_manager_properties_get (sm);
609 * Find the first free segment to allocate the fifos in
611 fs = find_max_free_segment (sm, thread_index);
615 clib_rwlock_reader_lock (&sm->segments_rwlock);
616 alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index,
620 /* On success, keep lock until fifos are initialized */
624 segment_manager_segment_reader_unlock (sm);
638 ASSERT (rx_fifo && tx_fifo);
639 sm_index = segment_manager_index (sm);
640 fs_index = segment_manager_segment_index (sm, fs);
641 (*tx_fifo)->segment_manager = sm_index;
642 (*rx_fifo)->segment_manager = sm_index;
643 (*tx_fifo)->segment_index = fs_index;
644 (*rx_fifo)->segment_index = fs_index;
648 app_worker_t *app_wrk;
649 fs_handle = segment_manager_segment_handle (sm, fs);
650 app_wrk = app_worker_get (sm->app_wrk_index);
651 rv = app_worker_add_segment_notify (app_wrk, fs_handle);
653 /* Drop the lock after app is notified */
654 segment_manager_segment_reader_unlock (sm);
659 * Allocation failed, see if we can add a new segment
661 if (props->add_segment)
665 clib_warning ("Added a segment, still can't allocate a fifo");
666 segment_manager_segment_reader_unlock (sm);
667 return SESSION_ERROR_NEW_SEG_NO_SPACE;
669 if ((new_fs_index = segment_manager_add_segment (sm, 0)) < 0)
671 clib_warning ("Failed to add new segment");
672 return SESSION_ERROR_SEG_CREATE;
674 fs = segment_manager_get_segment_w_lock (sm, new_fs_index);
675 alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index,
684 clib_warning ("Can't add new seg and no space to allocate fifos!");
685 return SESSION_ERROR_NO_SPACE;
690 segment_manager_dealloc_fifos (svm_fifo_t * rx_fifo, svm_fifo_t * tx_fifo)
692 segment_manager_t *sm;
696 if (!rx_fifo || !tx_fifo)
699 /* It's possible to have no segment manager if the session was removed
700 * as result of a detach. */
701 if (!(sm = segment_manager_get_if_valid (rx_fifo->segment_manager)))
704 segment_index = rx_fifo->segment_index;
705 fs = segment_manager_get_segment_w_lock (sm, segment_index);
706 fifo_segment_free_fifo (fs, rx_fifo);
707 fifo_segment_free_fifo (fs, tx_fifo);
710 * Try to remove svm segment if it has no fifos. This can be done only if
711 * the segment is not the first in the segment manager or if it is first
712 * and it is not protected. Moreover, if the segment is first and the app
713 * has detached from the segment manager, remove the segment manager.
715 if (!fifo_segment_has_fifos (fs))
717 segment_manager_segment_reader_unlock (sm);
719 /* Remove segment if it holds no fifos or first but not protected */
720 if (segment_index != 0 || !sm->first_is_protected)
721 segment_manager_lock_and_del_segment (sm, segment_index);
723 /* Remove segment manager if no sessions and detached from app */
724 if (segment_manager_app_detached (sm)
725 && !segment_manager_has_fifos (sm))
727 segment_manager_free (sm);
731 segment_manager_segment_reader_unlock (sm);
735 segment_manager_evt_q_expected_size (u32 q_len)
737 u32 fifo_evt_size, notif_q_size, q_hdrs;
738 u32 msg_q_sz, fifo_evt_ring_sz, session_ntf_ring_sz;
740 fifo_evt_size = 1 << max_log2 (sizeof (session_event_t));
741 notif_q_size = clib_max (16, q_len >> 4);
743 msg_q_sz = q_len * sizeof (svm_msg_q_msg_t);
744 fifo_evt_ring_sz = q_len * fifo_evt_size;
745 session_ntf_ring_sz = notif_q_size * 256;
746 q_hdrs = sizeof (svm_queue_t) + sizeof (svm_msg_q_t);
748 return (msg_q_sz + fifo_evt_ring_sz + session_ntf_ring_sz + q_hdrs);
752 * Allocates shm queue in the first segment
754 * Must be called with lock held
757 segment_manager_alloc_queue (fifo_segment_t * segment,
758 segment_manager_props_t * props)
760 u32 fifo_evt_size, session_evt_size = 256, notif_q_size;
761 svm_msg_q_cfg_t _cfg, *cfg = &_cfg;
765 fifo_evt_size = sizeof (session_event_t);
766 notif_q_size = clib_max (16, props->evt_q_size >> 4);
768 svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = {
769 {props->evt_q_size, fifo_evt_size, 0},
770 {notif_q_size, session_evt_size, 0}
773 cfg->consumer_pid = 0;
775 cfg->q_nitems = props->evt_q_size;
778 oldheap = ssvm_push_heap (segment->ssvm.sh);
779 q = svm_msg_q_alloc (cfg);
780 fifo_segment_update_free_bytes (segment);
781 ssvm_pop_heap (oldheap);
783 if (props->use_mq_eventfd)
785 if (svm_msg_q_alloc_producer_eventfd (q))
786 clib_warning ("failed to alloc eventfd");
792 segment_manager_event_queue (segment_manager_t * sm)
794 return sm->event_queue;
798 * Frees shm queue allocated in the first segment
801 segment_manager_dealloc_queue (segment_manager_t * sm, svm_queue_t * q)
803 fifo_segment_t *segment;
804 ssvm_shared_header_t *sh;
807 ASSERT (!pool_is_free_index (sm->segments, 0));
809 segment = segment_manager_get_segment_w_lock (sm, 0);
810 sh = segment->ssvm.sh;
812 oldheap = ssvm_push_heap (sh);
814 ssvm_pop_heap (oldheap);
815 segment_manager_segment_reader_unlock (sm);
819 * Init segment vm address allocator
822 segment_manager_main_init (segment_manager_main_init_args_t * a)
824 segment_manager_main_t *sm = &sm_main;
825 clib_valloc_chunk_t _ip, *ip = &_ip;
827 ip->baseva = a->baseva;
830 clib_valloc_init (&sm->va_allocator, ip, 1 /* lock */ );
832 sm->default_fifo_size = 1 << 12;
833 sm->default_segment_size = 1 << 20;
834 sm->default_app_mq_size = 128;
835 sm->default_high_watermark = 80;
836 sm->default_low_watermark = 50;
839 static clib_error_t *
840 segment_manager_show_fn (vlib_main_t * vm, unformat_input_t * input,
841 vlib_cli_command_t * cmd)
843 segment_manager_main_t *smm = &sm_main;
844 u8 show_segments = 0, verbose = 0;
845 segment_manager_t *sm;
848 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
850 if (unformat (input, "segments"))
852 else if (unformat (input, "verbose"))
855 return clib_error_return (0, "unknown input `%U'",
856 format_unformat_error, input);
858 vlib_cli_output (vm, "%d segment managers allocated",
859 pool_elts (smm->segment_managers));
860 if (verbose && pool_elts (smm->segment_managers))
862 vlib_cli_output (vm, "%-10s%=15s%=12s", "Index", "App Index",
866 pool_foreach (sm, smm->segment_managers, ({
867 vlib_cli_output (vm, "%-10d%=15d%=12d", segment_manager_index (sm),
868 sm->app_wrk_index, pool_elts (sm->segments));
875 vlib_cli_output (vm, "%U", format_fifo_segment, 0, verbose);
878 pool_foreach (sm, smm->segment_managers, ({
879 segment_manager_foreach_segment_w_lock (seg, sm, ({
880 vlib_cli_output (vm, "%U", format_fifo_segment, seg, verbose);
890 VLIB_CLI_COMMAND (segment_manager_show_command, static) =
892 .path = "show segment-manager",
893 .short_help = "show segment-manager [segments][verbose]",
894 .function = segment_manager_show_fn,
899 segment_manager_format_sessions (segment_manager_t * sm, int verbose)
901 vlib_main_t *vm = vlib_get_main ();
902 app_worker_t *app_wrk;
912 vlib_cli_output (vm, "%-40s%-20s%-15s%-10s", "Connection", "App",
913 "API Client", "SegManager");
915 vlib_cli_output (vm, "%-40s%-20s", "Connection", "App");
919 app_wrk = app_worker_get (sm->app_wrk_index);
920 app_name = application_name_from_index (app_wrk->app_index);
922 clib_rwlock_reader_lock (&sm->segments_rwlock);
925 pool_foreach (fs, sm->segments, ({
926 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
928 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
931 u32 session_index, thread_index;
934 session_index = f->master_session_index;
935 thread_index = f->master_thread_index;
937 session = session_get (session_index, thread_index);
938 str = format (0, "%U", format_session, session, verbose);
941 s = format (s, "%-40s%-20s%-15u%-10u", str, app_name,
942 app_wrk->api_client_index, app_wrk->connects_seg_manager);
944 s = format (s, "%-40s%-20s", str, app_name);
946 vlib_cli_output (vm, "%v", s);
947 vec_reset_length (s);
957 clib_rwlock_reader_unlock (&sm->segments_rwlock);
961 segment_manager_set_watermarks (segment_manager_t * sm,
962 u8 high_watermark, u8 low_watermark)
964 ASSERT (high_watermark >= 0 && high_watermark <= 100 &&
965 low_watermark >= 0 && low_watermark <= 100 &&
966 low_watermark <= high_watermark);
968 sm->high_watermark = high_watermark;
969 sm->low_watermark = low_watermark;
973 * fd.io coding-style-patch-verification: ON
976 * eval: (c-set-style "gnu")