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->flags &= ~FIFO_SEGMENT_F_MEM_LIMIT;
178 if (vlib_num_workers ())
179 clib_rwlock_writer_unlock (&sm->segments_rwlock);
185 * Remove segment without lock
188 segment_manager_del_segment (segment_manager_t * sm, fifo_segment_t * fs)
190 segment_manager_main_t *smm = &sm_main;
192 if (ssvm_type (&fs->ssvm) != SSVM_SEGMENT_PRIVATE)
194 clib_valloc_free (&smm->va_allocator, fs->ssvm.requested_va);
196 if (sm->app_wrk_index != SEGMENT_MANAGER_INVALID_APP_INDEX)
198 app_worker_t *app_wrk;
200 app_wrk = app_worker_get (sm->app_wrk_index);
201 segment_handle = segment_manager_segment_handle (sm, fs);
202 app_worker_del_segment_notify (app_wrk, segment_handle);
206 ssvm_delete (&fs->ssvm);
209 clib_memset (fs, 0xfb, sizeof (*fs));
210 pool_put (sm->segments, fs);
214 * Removes segment after acquiring writer lock
217 segment_manager_lock_and_del_segment (segment_manager_t * sm, u32 fs_index)
222 clib_rwlock_writer_lock (&sm->segments_rwlock);
223 fs = segment_manager_get_segment (sm, fs_index);
224 is_prealloc = fifo_segment_flags (fs) & FIFO_SEGMENT_F_IS_PREALLOCATED;
225 if (is_prealloc && !segment_manager_app_detached (sm))
227 clib_rwlock_writer_unlock (&sm->segments_rwlock);
231 segment_manager_del_segment (sm, fs);
232 clib_rwlock_writer_unlock (&sm->segments_rwlock);
236 * Reads a segment from the segment manager's pool without lock
239 segment_manager_get_segment (segment_manager_t * sm, u32 segment_index)
241 return pool_elt_at_index (sm->segments, segment_index);
245 segment_manager_segment_handle (segment_manager_t * sm,
246 fifo_segment_t * segment)
248 u32 segment_index = segment_manager_segment_index (sm, segment);
249 return (((u64) segment_manager_index (sm) << 32) | segment_index);
253 segment_manager_parse_segment_handle (u64 segment_handle, u32 * sm_index,
256 *sm_index = segment_handle >> 32;
257 *segment_index = segment_handle & 0xFFFFFFFF;
261 segment_manager_make_segment_handle (u32 segment_manager_index,
264 return (((u64) segment_manager_index << 32) | segment_index);
268 segment_manager_get_segment_w_handle (u64 segment_handle)
270 u32 sm_index, segment_index;
271 segment_manager_t *sm;
273 segment_manager_parse_segment_handle (segment_handle, &sm_index,
275 sm = segment_manager_get (sm_index);
276 if (!sm || pool_is_free_index (sm->segments, segment_index))
278 return pool_elt_at_index (sm->segments, segment_index);
282 * Reads a segment from the segment manager's pool and acquires reader lock
284 * Caller must drop the reader's lock by calling
285 * @ref segment_manager_segment_reader_unlock once it finishes working with
289 segment_manager_get_segment_w_lock (segment_manager_t * sm, u32 segment_index)
291 clib_rwlock_reader_lock (&sm->segments_rwlock);
292 return pool_elt_at_index (sm->segments, segment_index);
296 segment_manager_segment_reader_unlock (segment_manager_t * sm)
298 clib_rwlock_reader_unlock (&sm->segments_rwlock);
302 segment_manager_segment_writer_unlock (segment_manager_t * sm)
304 clib_rwlock_writer_unlock (&sm->segments_rwlock);
308 segment_manager_alloc (void)
310 segment_manager_main_t *smm = &sm_main;
311 segment_manager_t *sm;
313 pool_get_zero (smm->segment_managers, sm);
314 clib_rwlock_init (&sm->segments_rwlock);
319 * Initializes segment manager based on options provided.
320 * Returns error if ssvm segment(s) allocation fails.
323 segment_manager_init (segment_manager_t * sm)
325 u32 rx_fifo_size, tx_fifo_size, pair_size;
326 u32 rx_rounded_data_size, tx_rounded_data_size;
327 uword first_seg_size;
328 u32 prealloc_fifo_pairs;
329 u64 approx_total_size, max_seg_size = ((u64) 1 << 32) - (128 << 10);
330 segment_manager_props_t *props;
331 fifo_segment_t *segment;
332 u32 approx_segment_count;
335 props = segment_manager_properties_get (sm);
336 first_seg_size = clib_max (props->segment_size,
337 sm_main.default_segment_size);
338 prealloc_fifo_pairs = props->prealloc_fifos;
340 sm->max_fifo_size = props->max_fifo_size ?
341 props->max_fifo_size : sm_main.default_max_fifo_size;
342 sm->max_fifo_size = clib_max (sm->max_fifo_size, 4096);
344 segment_manager_set_watermarks (sm,
345 props->high_watermark,
346 props->low_watermark);
348 if (prealloc_fifo_pairs)
350 /* Figure out how many segments should be preallocated */
351 rx_rounded_data_size = (1 << (max_log2 (props->rx_fifo_size)));
352 tx_rounded_data_size = (1 << (max_log2 (props->tx_fifo_size)));
354 rx_fifo_size = sizeof (svm_fifo_t) + rx_rounded_data_size;
355 tx_fifo_size = sizeof (svm_fifo_t) + tx_rounded_data_size;
356 pair_size = rx_fifo_size + tx_fifo_size;
358 approx_total_size = (u64) prealloc_fifo_pairs *pair_size;
359 if (first_seg_size > approx_total_size)
360 max_seg_size = first_seg_size;
361 approx_segment_count = (approx_total_size + (max_seg_size - 1))
364 /* Allocate the segments */
365 for (i = 0; i < approx_segment_count + 1; i++)
367 seg_index = segment_manager_add_segment (sm, max_seg_size);
370 clib_warning ("Failed to preallocate segment %d", i);
374 segment = segment_manager_get_segment (sm, seg_index);
376 sm->event_queue = segment_manager_alloc_queue (segment, props);
378 fifo_segment_preallocate_fifo_pairs (segment,
381 &prealloc_fifo_pairs);
382 fifo_segment_flags (segment) = FIFO_SEGMENT_F_IS_PREALLOCATED;
383 if (prealloc_fifo_pairs == 0)
389 seg_index = segment_manager_add_segment (sm, first_seg_size);
392 clib_warning ("Failed to allocate segment");
395 segment = segment_manager_get_segment (sm, seg_index);
396 sm->event_queue = segment_manager_alloc_queue (segment, props);
403 * Cleanup segment manager.
406 segment_manager_free (segment_manager_t * sm)
408 segment_manager_main_t *smm = &sm_main;
409 fifo_segment_t *fifo_segment;
411 ASSERT (!segment_manager_has_fifos (sm)
412 && segment_manager_app_detached (sm));
414 /* If we have empty preallocated segments that haven't been removed, remove
415 * them now. Apart from that, the first segment in the first segment manager
416 * is not removed when all fifos are removed. It can only be removed when
417 * the manager is explicitly deleted/detached by the app. */
418 clib_rwlock_writer_lock (&sm->segments_rwlock);
421 pool_foreach (fifo_segment, sm->segments, ({
422 segment_manager_del_segment (sm, fifo_segment);
426 clib_rwlock_writer_unlock (&sm->segments_rwlock);
428 clib_rwlock_free (&sm->segments_rwlock);
430 clib_memset (sm, 0xfe, sizeof (*sm));
431 pool_put (smm->segment_managers, sm);
435 segment_manager_init_free (segment_manager_t * sm)
437 segment_manager_app_detach (sm);
438 if (segment_manager_has_fifos (sm))
439 segment_manager_del_sessions (sm);
442 ASSERT (!sm->first_is_protected || segment_manager_app_detached (sm));
443 segment_manager_free (sm);
448 segment_manager_get (u32 index)
450 return pool_elt_at_index (sm_main.segment_managers, index);
454 segment_manager_get_if_valid (u32 index)
456 if (pool_is_free_index (sm_main.segment_managers, index))
458 return pool_elt_at_index (sm_main.segment_managers, index);
461 static fifo_segment_t *
462 find_max_free_segment (segment_manager_t * sm, u32 thread_index)
464 fifo_segment_t *cur, *fs = 0;
465 uword free_bytes, max_free_bytes = 0;
467 clib_rwlock_reader_lock (&sm->segments_rwlock);
469 pool_foreach (cur, sm->segments, ({
470 if ((free_bytes = fifo_segment_free_bytes (cur)) > max_free_bytes)
472 max_free_bytes = free_bytes;
477 clib_rwlock_reader_unlock (&sm->segments_rwlock);
483 segment_manager_index (segment_manager_t * sm)
485 return sm - sm_main.segment_managers;
489 segment_manager_has_fifos (segment_manager_t * sm)
495 segment_manager_foreach_segment_w_lock (seg, sm, ({
496 if (CLIB_DEBUG && !first && !fifo_segment_has_fifos (seg)
497 && !(fifo_segment_flags (seg) & FIFO_SEGMENT_F_IS_PREALLOCATED))
499 clib_warning ("segment %d has no fifos!",
500 segment_manager_segment_index (sm, seg));
503 if (fifo_segment_has_fifos (seg))
505 segment_manager_segment_reader_unlock (sm);
515 * Initiate disconnects for all sessions 'owned' by a segment manager
518 segment_manager_del_sessions (segment_manager_t * sm)
520 session_handle_t *handles = 0, *handle;
526 ASSERT (pool_elts (sm->segments) != 0);
528 /* Across all fifo segments used by the server */
530 segment_manager_foreach_segment_w_lock (fs, sm, ({
531 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
533 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
536 * Remove any residual sessions from the session lookup table
537 * Don't bother deleting the individual fifos, we're going to
538 * throw away the fifo segment in a minute.
542 session = session_get_if_valid (f->master_session_index,
543 f->master_thread_index);
545 vec_add1 (handles, session_handle (session));
550 /* Instead of removing the segment, test when cleaning up disconnected
551 * sessions if the segment can be removed.
556 vec_foreach (handle, handles)
557 session_close (session_get_from_handle (*handle));
561 segment_manager_try_alloc_fifos (fifo_segment_t * fifo_segment,
563 u32 rx_fifo_size, u32 tx_fifo_size,
564 svm_fifo_t ** rx_fifo, svm_fifo_t ** tx_fifo)
566 rx_fifo_size = clib_max (rx_fifo_size, sm_main.default_fifo_size);
567 *rx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
569 FIFO_SEGMENT_RX_FIFO);
571 tx_fifo_size = clib_max (tx_fifo_size, sm_main.default_fifo_size);
572 *tx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
574 FIFO_SEGMENT_TX_FIFO);
578 /* This would be very odd, but handle it... */
581 fifo_segment_free_fifo (fifo_segment, *tx_fifo);
590 fifo_segment_free_fifo (fifo_segment, *rx_fifo);
600 segment_manager_alloc_session_fifos (segment_manager_t * sm,
602 svm_fifo_t ** rx_fifo,
603 svm_fifo_t ** tx_fifo)
605 int alloc_fail = 1, rv = 0, new_fs_index;
606 segment_manager_props_t *props;
607 fifo_segment_t *fs = 0;
608 u32 sm_index, fs_index;
609 u8 added_a_segment = 0;
612 props = segment_manager_properties_get (sm);
615 * Find the first free segment to allocate the fifos in
617 fs = find_max_free_segment (sm, thread_index);
621 clib_rwlock_reader_lock (&sm->segments_rwlock);
622 alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index,
626 /* On success, keep lock until fifos are initialized */
630 segment_manager_segment_reader_unlock (sm);
644 ASSERT (rx_fifo && tx_fifo);
645 sm_index = segment_manager_index (sm);
646 fs_index = segment_manager_segment_index (sm, fs);
647 (*tx_fifo)->segment_manager = sm_index;
648 (*rx_fifo)->segment_manager = sm_index;
649 (*tx_fifo)->segment_index = fs_index;
650 (*rx_fifo)->segment_index = fs_index;
654 app_worker_t *app_wrk;
655 fs_handle = segment_manager_segment_handle (sm, fs);
656 app_wrk = app_worker_get (sm->app_wrk_index);
657 rv = app_worker_add_segment_notify (app_wrk, fs_handle);
659 /* Drop the lock after app is notified */
660 segment_manager_segment_reader_unlock (sm);
665 * Allocation failed, see if we can add a new segment
667 if (props->add_segment)
671 clib_warning ("Added a segment, still can't allocate a fifo");
672 segment_manager_segment_reader_unlock (sm);
673 return SESSION_ERROR_NEW_SEG_NO_SPACE;
675 if ((new_fs_index = segment_manager_add_segment (sm, 0)) < 0)
677 clib_warning ("Failed to add new segment");
678 return SESSION_ERROR_SEG_CREATE;
680 fs = segment_manager_get_segment_w_lock (sm, new_fs_index);
681 alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index,
690 clib_warning ("Can't add new seg and no space to allocate fifos!");
691 return SESSION_ERROR_NO_SPACE;
696 segment_manager_dealloc_fifos (svm_fifo_t * rx_fifo, svm_fifo_t * tx_fifo)
698 segment_manager_t *sm;
702 if (!rx_fifo || !tx_fifo)
705 /* It's possible to have no segment manager if the session was removed
706 * as result of a detach. */
707 if (!(sm = segment_manager_get_if_valid (rx_fifo->segment_manager)))
710 segment_index = rx_fifo->segment_index;
711 fs = segment_manager_get_segment_w_lock (sm, segment_index);
712 fifo_segment_free_fifo (fs, rx_fifo);
713 fifo_segment_free_fifo (fs, tx_fifo);
716 * Try to remove svm segment if it has no fifos. This can be done only if
717 * the segment is not the first in the segment manager or if it is first
718 * and it is not protected. Moreover, if the segment is first and the app
719 * has detached from the segment manager, remove the segment manager.
721 if (!fifo_segment_has_fifos (fs))
723 segment_manager_segment_reader_unlock (sm);
725 /* Remove segment if it holds no fifos or first but not protected */
726 if (segment_index != 0 || !sm->first_is_protected)
727 segment_manager_lock_and_del_segment (sm, segment_index);
729 /* Remove segment manager if no sessions and detached from app */
730 if (segment_manager_app_detached (sm)
731 && !segment_manager_has_fifos (sm))
733 segment_manager_free (sm);
737 segment_manager_segment_reader_unlock (sm);
741 segment_manager_evt_q_expected_size (u32 q_len)
743 u32 fifo_evt_size, notif_q_size, q_hdrs;
744 u32 msg_q_sz, fifo_evt_ring_sz, session_ntf_ring_sz;
746 fifo_evt_size = 1 << max_log2 (sizeof (session_event_t));
747 notif_q_size = clib_max (16, q_len >> 4);
749 msg_q_sz = q_len * sizeof (svm_msg_q_msg_t);
750 fifo_evt_ring_sz = q_len * fifo_evt_size;
751 session_ntf_ring_sz = notif_q_size * 256;
752 q_hdrs = sizeof (svm_queue_t) + sizeof (svm_msg_q_t);
754 return (msg_q_sz + fifo_evt_ring_sz + session_ntf_ring_sz + q_hdrs);
758 * Allocates shm queue in the first segment
760 * Must be called with lock held
763 segment_manager_alloc_queue (fifo_segment_t * segment,
764 segment_manager_props_t * props)
766 u32 fifo_evt_size, session_evt_size = 256, notif_q_size;
767 svm_msg_q_cfg_t _cfg, *cfg = &_cfg;
771 fifo_evt_size = sizeof (session_event_t);
772 notif_q_size = clib_max (16, props->evt_q_size >> 4);
774 svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = {
775 {props->evt_q_size, fifo_evt_size, 0},
776 {notif_q_size, session_evt_size, 0}
779 cfg->consumer_pid = 0;
781 cfg->q_nitems = props->evt_q_size;
784 oldheap = ssvm_push_heap (segment->ssvm.sh);
785 q = svm_msg_q_alloc (cfg);
786 fifo_segment_update_free_bytes (segment);
787 ssvm_pop_heap (oldheap);
789 if (props->use_mq_eventfd)
791 if (svm_msg_q_alloc_producer_eventfd (q))
792 clib_warning ("failed to alloc eventfd");
798 segment_manager_event_queue (segment_manager_t * sm)
800 return sm->event_queue;
804 * Frees shm queue allocated in the first segment
807 segment_manager_dealloc_queue (segment_manager_t * sm, svm_queue_t * q)
809 fifo_segment_t *segment;
810 ssvm_shared_header_t *sh;
813 ASSERT (!pool_is_free_index (sm->segments, 0));
815 segment = segment_manager_get_segment_w_lock (sm, 0);
816 sh = segment->ssvm.sh;
818 oldheap = ssvm_push_heap (sh);
820 ssvm_pop_heap (oldheap);
821 segment_manager_segment_reader_unlock (sm);
825 * Init segment vm address allocator
828 segment_manager_main_init (segment_manager_main_init_args_t * a)
830 segment_manager_main_t *sm = &sm_main;
831 clib_valloc_chunk_t _ip, *ip = &_ip;
833 ip->baseva = a->baseva;
836 clib_valloc_init (&sm->va_allocator, ip, 1 /* lock */ );
838 sm->default_fifo_size = 1 << 12;
839 sm->default_segment_size = 1 << 20;
840 sm->default_app_mq_size = 128;
841 sm->default_max_fifo_size = 4 << 20;
842 sm->default_high_watermark = 80;
843 sm->default_low_watermark = 50;
846 static clib_error_t *
847 segment_manager_show_fn (vlib_main_t * vm, unformat_input_t * input,
848 vlib_cli_command_t * cmd)
850 segment_manager_main_t *smm = &sm_main;
851 u8 show_segments = 0, verbose = 0;
852 segment_manager_t *sm;
854 app_worker_t *app_wrk;
858 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
860 if (unformat (input, "segments"))
862 else if (unformat (input, "verbose"))
865 return clib_error_return (0, "unknown input `%U'",
866 format_unformat_error, input);
868 vlib_cli_output (vm, "%d segment managers allocated",
869 pool_elts (smm->segment_managers));
870 if (verbose && pool_elts (smm->segment_managers))
872 vlib_cli_output (vm, "%-6s%=10s%=10s%=13s%=11s%=11s%=12s",
873 "Index", "AppIndex", "Segments", "MaxFifoSize",
874 "HighWater", "LowWater", "FifoTuning");
877 pool_foreach (sm, smm->segment_managers, ({
878 app_wrk = app_worker_get_if_valid (sm->app_wrk_index);
879 app = app_wrk ? application_get (app_wrk->app_index) : 0;
880 custom_logic = (app && (app->cb_fns.fifo_tuning_callback)) ? 1 : 0;
882 vlib_cli_output (vm, "%-6d%=10d%=10d%=13U%=11d%=11d%=12s",
883 segment_manager_index (sm),
884 sm->app_wrk_index, pool_elts (sm->segments),
885 format_memory_size, sm->max_fifo_size,
886 sm->high_watermark, sm->low_watermark,
887 custom_logic ? "custom" : "none");
894 vlib_cli_output (vm, "%U", format_fifo_segment, 0, verbose);
897 pool_foreach (sm, smm->segment_managers, ({
898 segment_manager_foreach_segment_w_lock (seg, sm, ({
899 vlib_cli_output (vm, "%U", format_fifo_segment, seg, verbose);
909 VLIB_CLI_COMMAND (segment_manager_show_command, static) =
911 .path = "show segment-manager",
912 .short_help = "show segment-manager [segments][verbose]",
913 .function = segment_manager_show_fn,
918 segment_manager_format_sessions (segment_manager_t * sm, int verbose)
920 vlib_main_t *vm = vlib_get_main ();
921 app_worker_t *app_wrk;
931 vlib_cli_output (vm, "%-40s%-20s%-15s%-10s", "Connection", "App",
932 "API Client", "SegManager");
934 vlib_cli_output (vm, "%-40s%-20s", "Connection", "App");
938 app_wrk = app_worker_get (sm->app_wrk_index);
939 app_name = application_name_from_index (app_wrk->app_index);
941 clib_rwlock_reader_lock (&sm->segments_rwlock);
944 pool_foreach (fs, sm->segments, ({
945 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
947 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
950 u32 session_index, thread_index;
953 session_index = f->master_session_index;
954 thread_index = f->master_thread_index;
956 session = session_get (session_index, thread_index);
957 str = format (0, "%U", format_session, session, verbose);
960 s = format (s, "%-40s%-20s%-15u%-10u", str, app_name,
961 app_wrk->api_client_index, app_wrk->connects_seg_manager);
963 s = format (s, "%-40s%-20s", str, app_name);
965 vlib_cli_output (vm, "%v", s);
966 vec_reset_length (s);
976 clib_rwlock_reader_unlock (&sm->segments_rwlock);
980 segment_manager_set_watermarks (segment_manager_t * sm,
981 u8 high_watermark, u8 low_watermark)
983 ASSERT (high_watermark >= 0 && high_watermark <= 100 &&
984 low_watermark >= 0 && low_watermark <= 100 &&
985 low_watermark <= high_watermark);
987 sm->high_watermark = high_watermark;
988 sm->low_watermark = low_watermark;
992 * fd.io coding-style-patch-verification: ON
995 * eval: (c-set-style "gnu")