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 u32 default_max_fifo_size; /**< default max fifo size */
33 u8 default_high_watermark; /**< default high watermark % */
34 u8 default_low_watermark; /**< default low watermark % */
35 } segment_manager_main_t;
37 static segment_manager_main_t sm_main;
39 #define segment_manager_foreach_segment_w_lock(VAR, SM, BODY) \
41 clib_rwlock_reader_lock (&(SM)->segments_rwlock); \
42 pool_foreach((VAR), ((SM)->segments), (BODY)); \
43 clib_rwlock_reader_unlock (&(SM)->segments_rwlock); \
46 static segment_manager_props_t *
47 segment_manager_properties_get (segment_manager_t * sm)
49 app_worker_t *app_wrk = app_worker_get (sm->app_wrk_index);
50 return application_get_segment_manager_properties (app_wrk->app_index);
53 segment_manager_props_t *
54 segment_manager_props_init (segment_manager_props_t * props)
56 props->add_segment_size = sm_main.default_segment_size;
57 props->rx_fifo_size = sm_main.default_fifo_size;
58 props->tx_fifo_size = sm_main.default_fifo_size;
59 props->evt_q_size = sm_main.default_app_mq_size;
60 props->max_fifo_size = sm_main.default_max_fifo_size;
61 props->high_watermark = sm_main.default_high_watermark;
62 props->low_watermark = sm_main.default_low_watermark;
63 props->n_slices = vlib_num_workers () + 1;
68 segment_manager_app_detached (segment_manager_t * sm)
70 return (sm->app_wrk_index == SEGMENT_MANAGER_INVALID_APP_INDEX);
74 segment_manager_app_detach (segment_manager_t * sm)
76 sm->app_wrk_index = SEGMENT_MANAGER_INVALID_APP_INDEX;
80 segment_manager_segment_index (segment_manager_t * sm, fifo_segment_t * seg)
82 return (seg - sm->segments);
86 * Adds segment to segment manager's pool
88 * If needed a writer's lock is acquired before allocating a new segment
89 * to avoid affecting any of the segments pool readers.
92 segment_manager_add_segment (segment_manager_t * sm, uword segment_size)
94 uword baseva = (uword) ~ 0ULL, alloc_size, page_size;
95 u32 rnd_margin = 128 << 10, fs_index = ~0;
96 segment_manager_main_t *smm = &sm_main;
97 segment_manager_props_t *props;
102 props = segment_manager_properties_get (sm);
104 /* Not configured for addition of new segments and not first */
105 if (!props->add_segment && !segment_size)
107 clib_warning ("cannot allocate new segment");
108 return VNET_API_ERROR_INVALID_VALUE;
112 * Allocate fifo segment and grab lock if needed
114 if (vlib_num_workers ())
115 clib_rwlock_writer_lock (&sm->segments_rwlock);
117 pool_get_zero (sm->segments, fs);
120 * Allocate ssvm segment
122 segment_size = segment_size ? segment_size : props->add_segment_size;
123 page_size = clib_mem_get_page_size ();
124 /* Protect against segment size u32 wrap */
125 segment_size = clib_max (segment_size + page_size - 1, segment_size);
126 segment_size = segment_size & ~(page_size - 1);
128 if (props->segment_type != SSVM_SEGMENT_PRIVATE)
130 seg_name = format (0, "%d-%d%c", getpid (), smm->seg_name_counter++, 0);
131 alloc_size = (uword) segment_size + rnd_margin;
132 baseva = clib_valloc_alloc (&smm->va_allocator, alloc_size, 0);
135 clib_warning ("out of space for segments");
136 pool_put (sm->segments, fs);
141 seg_name = format (0, "%s%c", "process-private", 0);
143 fs->ssvm.ssvm_size = segment_size;
144 fs->ssvm.name = seg_name;
145 fs->ssvm.requested_va = baseva;
147 if ((rv = ssvm_master_init (&fs->ssvm, props->segment_type)))
149 clib_warning ("svm_master_init ('%v', %u) failed", seg_name,
152 if (props->segment_type != SSVM_SEGMENT_PRIVATE)
153 clib_valloc_free (&smm->va_allocator, baseva);
154 pool_put (sm->segments, fs);
159 * Initialize fifo segment
161 fs->n_slices = props->n_slices;
162 fifo_segment_init (fs);
165 * Save segment index before dropping lock, if any held
167 fs_index = fs - sm->segments;
170 * Set watermarks in segment
172 fs->h->high_watermark = sm->high_watermark;
173 fs->h->low_watermark = sm->low_watermark;
174 fs->h->pct_first_alloc = props->pct_first_alloc;
175 fs->h->flags &= ~FIFO_SEGMENT_F_MEM_LIMIT;
179 if (vlib_num_workers ())
180 clib_rwlock_writer_unlock (&sm->segments_rwlock);
186 * Remove segment without lock
189 segment_manager_del_segment (segment_manager_t * sm, fifo_segment_t * fs)
191 segment_manager_main_t *smm = &sm_main;
193 if (ssvm_type (&fs->ssvm) != SSVM_SEGMENT_PRIVATE)
195 clib_valloc_free (&smm->va_allocator, fs->ssvm.requested_va);
197 if (sm->app_wrk_index != SEGMENT_MANAGER_INVALID_APP_INDEX)
199 app_worker_t *app_wrk;
201 app_wrk = app_worker_get (sm->app_wrk_index);
202 segment_handle = segment_manager_segment_handle (sm, fs);
203 app_worker_del_segment_notify (app_wrk, segment_handle);
207 ssvm_delete (&fs->ssvm);
210 clib_memset (fs, 0xfb, sizeof (*fs));
211 pool_put (sm->segments, fs);
215 * Removes segment after acquiring writer lock
218 segment_manager_lock_and_del_segment (segment_manager_t * sm, u32 fs_index)
223 clib_rwlock_writer_lock (&sm->segments_rwlock);
224 fs = segment_manager_get_segment (sm, fs_index);
225 is_prealloc = fifo_segment_flags (fs) & FIFO_SEGMENT_F_IS_PREALLOCATED;
226 if (is_prealloc && !segment_manager_app_detached (sm))
228 clib_rwlock_writer_unlock (&sm->segments_rwlock);
232 segment_manager_del_segment (sm, fs);
233 clib_rwlock_writer_unlock (&sm->segments_rwlock);
237 * Reads a segment from the segment manager's pool without lock
240 segment_manager_get_segment (segment_manager_t * sm, u32 segment_index)
242 return pool_elt_at_index (sm->segments, segment_index);
246 segment_manager_segment_handle (segment_manager_t * sm,
247 fifo_segment_t * segment)
249 u32 segment_index = segment_manager_segment_index (sm, segment);
250 return (((u64) segment_manager_index (sm) << 32) | segment_index);
254 segment_manager_parse_segment_handle (u64 segment_handle, u32 * sm_index,
257 *sm_index = segment_handle >> 32;
258 *segment_index = segment_handle & 0xFFFFFFFF;
262 segment_manager_make_segment_handle (u32 segment_manager_index,
265 return (((u64) segment_manager_index << 32) | segment_index);
269 segment_manager_get_segment_w_handle (u64 segment_handle)
271 u32 sm_index, segment_index;
272 segment_manager_t *sm;
274 segment_manager_parse_segment_handle (segment_handle, &sm_index,
276 sm = segment_manager_get (sm_index);
277 if (!sm || pool_is_free_index (sm->segments, segment_index))
279 return pool_elt_at_index (sm->segments, segment_index);
283 * Reads a segment from the segment manager's pool and acquires reader lock
285 * Caller must drop the reader's lock by calling
286 * @ref segment_manager_segment_reader_unlock once it finishes working with
290 segment_manager_get_segment_w_lock (segment_manager_t * sm, u32 segment_index)
292 clib_rwlock_reader_lock (&sm->segments_rwlock);
293 return pool_elt_at_index (sm->segments, segment_index);
297 segment_manager_segment_reader_lock (segment_manager_t * sm)
299 clib_rwlock_reader_lock (&sm->segments_rwlock);
303 segment_manager_segment_reader_unlock (segment_manager_t * sm)
305 clib_rwlock_reader_unlock (&sm->segments_rwlock);
309 segment_manager_segment_writer_unlock (segment_manager_t * sm)
311 clib_rwlock_writer_unlock (&sm->segments_rwlock);
315 segment_manager_alloc (void)
317 segment_manager_main_t *smm = &sm_main;
318 segment_manager_t *sm;
320 pool_get_zero (smm->segment_managers, sm);
321 clib_rwlock_init (&sm->segments_rwlock);
326 * Initializes segment manager based on options provided.
327 * Returns error if ssvm segment(s) allocation fails.
330 segment_manager_init (segment_manager_t * sm)
332 u32 rx_fifo_size, tx_fifo_size, pair_size;
333 u32 rx_rounded_data_size, tx_rounded_data_size;
334 uword first_seg_size;
335 u32 prealloc_fifo_pairs;
336 u64 approx_total_size, max_seg_size = ((u64) 1 << 32) - (128 << 10);
337 segment_manager_props_t *props;
338 fifo_segment_t *segment;
339 u32 approx_segment_count;
342 props = segment_manager_properties_get (sm);
343 first_seg_size = clib_max (props->segment_size,
344 sm_main.default_segment_size);
345 prealloc_fifo_pairs = props->prealloc_fifos;
347 sm->max_fifo_size = props->max_fifo_size ?
348 props->max_fifo_size : sm_main.default_max_fifo_size;
349 sm->max_fifo_size = clib_max (sm->max_fifo_size, 4096);
351 segment_manager_set_watermarks (sm,
352 props->high_watermark,
353 props->low_watermark);
355 if (prealloc_fifo_pairs)
357 /* Figure out how many segments should be preallocated */
358 rx_rounded_data_size = (1 << (max_log2 (props->rx_fifo_size)));
359 tx_rounded_data_size = (1 << (max_log2 (props->tx_fifo_size)));
361 rx_fifo_size = sizeof (svm_fifo_t) + rx_rounded_data_size;
362 tx_fifo_size = sizeof (svm_fifo_t) + tx_rounded_data_size;
363 pair_size = rx_fifo_size + tx_fifo_size;
365 approx_total_size = (u64) prealloc_fifo_pairs *pair_size;
366 if (first_seg_size > approx_total_size)
367 max_seg_size = first_seg_size;
368 approx_segment_count = (approx_total_size + (max_seg_size - 1))
371 /* Allocate the segments */
372 for (i = 0; i < approx_segment_count + 1; i++)
374 seg_index = segment_manager_add_segment (sm, max_seg_size);
377 clib_warning ("Failed to preallocate segment %d", i);
381 segment = segment_manager_get_segment (sm, seg_index);
383 sm->event_queue = segment_manager_alloc_queue (segment, props);
385 fifo_segment_preallocate_fifo_pairs (segment,
388 &prealloc_fifo_pairs);
389 fifo_segment_flags (segment) = FIFO_SEGMENT_F_IS_PREALLOCATED;
390 if (prealloc_fifo_pairs == 0)
396 seg_index = segment_manager_add_segment (sm, first_seg_size);
399 clib_warning ("Failed to allocate segment");
402 segment = segment_manager_get_segment (sm, seg_index);
403 sm->event_queue = segment_manager_alloc_queue (segment, props);
410 * Cleanup segment manager.
413 segment_manager_free (segment_manager_t * sm)
415 segment_manager_main_t *smm = &sm_main;
416 fifo_segment_t *fifo_segment;
418 ASSERT (!segment_manager_has_fifos (sm)
419 && segment_manager_app_detached (sm));
421 /* If we have empty preallocated segments that haven't been removed, remove
422 * them now. Apart from that, the first segment in the first segment manager
423 * is not removed when all fifos are removed. It can only be removed when
424 * the manager is explicitly deleted/detached by the app. */
425 clib_rwlock_writer_lock (&sm->segments_rwlock);
428 pool_foreach (fifo_segment, sm->segments, ({
429 segment_manager_del_segment (sm, fifo_segment);
433 clib_rwlock_writer_unlock (&sm->segments_rwlock);
435 clib_rwlock_free (&sm->segments_rwlock);
437 clib_memset (sm, 0xfe, sizeof (*sm));
438 pool_put (smm->segment_managers, sm);
442 segment_manager_init_free (segment_manager_t * sm)
444 segment_manager_app_detach (sm);
445 if (segment_manager_has_fifos (sm))
446 segment_manager_del_sessions (sm);
449 ASSERT (!sm->first_is_protected || segment_manager_app_detached (sm));
450 segment_manager_free (sm);
455 segment_manager_get (u32 index)
457 return pool_elt_at_index (sm_main.segment_managers, index);
461 segment_manager_get_if_valid (u32 index)
463 if (pool_is_free_index (sm_main.segment_managers, index))
465 return pool_elt_at_index (sm_main.segment_managers, index);
469 segment_manager_index (segment_manager_t * sm)
471 return sm - sm_main.segment_managers;
475 segment_manager_has_fifos (segment_manager_t * sm)
481 segment_manager_foreach_segment_w_lock (seg, sm, ({
482 if (CLIB_DEBUG && !first && !fifo_segment_has_fifos (seg)
483 && !(fifo_segment_flags (seg) & FIFO_SEGMENT_F_IS_PREALLOCATED))
485 clib_warning ("segment %d has no fifos!",
486 segment_manager_segment_index (sm, seg));
489 if (fifo_segment_has_fifos (seg))
491 segment_manager_segment_reader_unlock (sm);
501 * Initiate disconnects for all sessions 'owned' by a segment manager
504 segment_manager_del_sessions (segment_manager_t * sm)
506 session_handle_t *handles = 0, *handle;
512 ASSERT (pool_elts (sm->segments) != 0);
514 /* Across all fifo segments used by the server */
516 segment_manager_foreach_segment_w_lock (fs, sm, ({
517 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
519 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
522 * Remove any residual sessions from the session lookup table
523 * Don't bother deleting the individual fifos, we're going to
524 * throw away the fifo segment in a minute.
528 session = session_get_if_valid (f->master_session_index,
529 f->master_thread_index);
531 vec_add1 (handles, session_handle (session));
536 /* Instead of removing the segment, test when cleaning up disconnected
537 * sessions if the segment can be removed.
542 vec_foreach (handle, handles)
543 session_close (session_get_from_handle (*handle));
547 segment_manager_try_alloc_fifos (fifo_segment_t * fifo_segment,
549 u32 rx_fifo_size, u32 tx_fifo_size,
550 svm_fifo_t ** rx_fifo, svm_fifo_t ** tx_fifo)
552 rx_fifo_size = clib_max (rx_fifo_size, sm_main.default_fifo_size);
553 *rx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
555 FIFO_SEGMENT_RX_FIFO);
557 tx_fifo_size = clib_max (tx_fifo_size, sm_main.default_fifo_size);
558 *tx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
560 FIFO_SEGMENT_TX_FIFO);
564 /* This would be very odd, but handle it... */
567 fifo_segment_free_fifo (fifo_segment, *tx_fifo);
576 fifo_segment_free_fifo (fifo_segment, *rx_fifo);
586 segment_manager_alloc_session_fifos (segment_manager_t * sm,
588 svm_fifo_t ** rx_fifo,
589 svm_fifo_t ** tx_fifo)
591 int alloc_fail = 1, rv = 0, new_fs_index;
592 uword free_bytes, max_free_bytes = 0;
593 segment_manager_props_t *props;
594 fifo_segment_t *fs = 0, *cur;
595 u32 sm_index, fs_index;
596 u8 added_a_segment = 0;
599 props = segment_manager_properties_get (sm);
602 * Find the first free segment to allocate the fifos in
605 segment_manager_segment_reader_lock (sm);
608 pool_foreach (cur, sm->segments, ({
609 free_bytes = fifo_segment_available_bytes (cur);
610 if (free_bytes > max_free_bytes)
612 max_free_bytes = free_bytes;
620 alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index,
624 /* On success, keep lock until fifos are initialized */
629 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_max_fifo_size = 4 << 20;
836 sm->default_high_watermark = 80;
837 sm->default_low_watermark = 50;
840 static clib_error_t *
841 segment_manager_show_fn (vlib_main_t * vm, unformat_input_t * input,
842 vlib_cli_command_t * cmd)
844 segment_manager_main_t *smm = &sm_main;
845 u8 show_segments = 0, verbose = 0;
846 segment_manager_t *sm;
848 app_worker_t *app_wrk;
852 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
854 if (unformat (input, "segments"))
856 else if (unformat (input, "verbose"))
859 return clib_error_return (0, "unknown input `%U'",
860 format_unformat_error, input);
862 vlib_cli_output (vm, "%d segment managers allocated",
863 pool_elts (smm->segment_managers));
864 if (verbose && pool_elts (smm->segment_managers))
866 vlib_cli_output (vm, "%-6s%=10s%=10s%=13s%=11s%=11s%=12s",
867 "Index", "AppIndex", "Segments", "MaxFifoSize",
868 "HighWater", "LowWater", "FifoTuning");
871 pool_foreach (sm, smm->segment_managers, ({
872 app_wrk = app_worker_get_if_valid (sm->app_wrk_index);
873 app = app_wrk ? application_get (app_wrk->app_index) : 0;
874 custom_logic = (app && (app->cb_fns.fifo_tuning_callback)) ? 1 : 0;
876 vlib_cli_output (vm, "%-6d%=10d%=10d%=13U%=11d%=11d%=12s",
877 segment_manager_index (sm),
878 sm->app_wrk_index, pool_elts (sm->segments),
879 format_memory_size, sm->max_fifo_size,
880 sm->high_watermark, sm->low_watermark,
881 custom_logic ? "custom" : "none");
888 vlib_cli_output (vm, "%U", format_fifo_segment, 0, verbose);
891 pool_foreach (sm, smm->segment_managers, ({
892 segment_manager_foreach_segment_w_lock (seg, sm, ({
893 vlib_cli_output (vm, "%U", format_fifo_segment, seg, verbose);
903 VLIB_CLI_COMMAND (segment_manager_show_command, static) =
905 .path = "show segment-manager",
906 .short_help = "show segment-manager [segments][verbose]",
907 .function = segment_manager_show_fn,
912 segment_manager_format_sessions (segment_manager_t * sm, int verbose)
914 vlib_main_t *vm = vlib_get_main ();
915 app_worker_t *app_wrk;
925 vlib_cli_output (vm, "%-40s%-20s%-15s%-10s", "Connection", "App",
926 "API Client", "SegManager");
928 vlib_cli_output (vm, "%-40s%-20s", "Connection", "App");
932 app_wrk = app_worker_get (sm->app_wrk_index);
933 app_name = application_name_from_index (app_wrk->app_index);
935 clib_rwlock_reader_lock (&sm->segments_rwlock);
938 pool_foreach (fs, sm->segments, ({
939 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
941 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
944 u32 session_index, thread_index;
947 session_index = f->master_session_index;
948 thread_index = f->master_thread_index;
950 session = session_get (session_index, thread_index);
951 str = format (0, "%U", format_session, session, verbose);
954 s = format (s, "%-40s%-20s%-15u%-10u", str, app_name,
955 app_wrk->api_client_index, app_wrk->connects_seg_manager);
957 s = format (s, "%-40s%-20s", str, app_name);
959 vlib_cli_output (vm, "%v", s);
960 vec_reset_length (s);
970 clib_rwlock_reader_unlock (&sm->segments_rwlock);
974 segment_manager_set_watermarks (segment_manager_t * sm,
975 u8 high_watermark, u8 low_watermark)
977 ASSERT (high_watermark <= 100 && low_watermark <= 100 &&
978 low_watermark <= high_watermark);
980 sm->high_watermark = high_watermark;
981 sm->low_watermark = low_watermark;
985 * fd.io coding-style-patch-verification: ON
988 * eval: (c-set-style "gnu")