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->flags & SEG_MANAGER_F_DETACHED);
74 segment_manager_app_detach (segment_manager_t * sm)
76 sm->flags |= SEG_MANAGER_F_DETACHED;
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);
142 app_worker_t *app_wrk = app_worker_get (sm->app_wrk_index);
143 application_t *app = application_get (app_wrk->app_index);
144 seg_name = format (0, "%v segment%c", app->name, 0);
147 fs->ssvm.ssvm_size = segment_size;
148 fs->ssvm.name = seg_name;
149 /* clib_mem_vm_map_shared consumes first page before requested_va */
150 fs->ssvm.requested_va = baseva + page_size;
152 if ((rv = ssvm_master_init (&fs->ssvm, props->segment_type)))
154 clib_warning ("svm_master_init ('%v', %u) failed", seg_name,
157 if (props->segment_type != SSVM_SEGMENT_PRIVATE)
158 clib_valloc_free (&smm->va_allocator, baseva);
159 pool_put (sm->segments, fs);
164 * Initialize fifo segment
166 fs->n_slices = props->n_slices;
167 fifo_segment_init (fs);
170 * Save segment index before dropping lock, if any held
172 fs_index = fs - sm->segments;
175 * Set watermarks in segment
177 fs->h->high_watermark = sm->high_watermark;
178 fs->h->low_watermark = sm->low_watermark;
179 fs->h->pct_first_alloc = props->pct_first_alloc;
180 fs->h->flags &= ~FIFO_SEGMENT_F_MEM_LIMIT;
184 if (vlib_num_workers ())
185 clib_rwlock_writer_unlock (&sm->segments_rwlock);
191 * Remove segment without lock
194 segment_manager_del_segment (segment_manager_t * sm, fifo_segment_t * fs)
196 segment_manager_main_t *smm = &sm_main;
198 if (ssvm_type (&fs->ssvm) != SSVM_SEGMENT_PRIVATE)
200 /* clib_mem_vm_map_shared consumes first page before requested_va */
201 clib_valloc_free (&smm->va_allocator,
202 fs->ssvm.requested_va - clib_mem_get_page_size ());
204 if (!segment_manager_app_detached (sm))
206 app_worker_t *app_wrk;
208 app_wrk = app_worker_get (sm->app_wrk_index);
209 segment_handle = segment_manager_segment_handle (sm, fs);
210 app_worker_del_segment_notify (app_wrk, segment_handle);
214 ssvm_delete (&fs->ssvm);
217 clib_memset (fs, 0xfb, sizeof (*fs));
218 pool_put (sm->segments, fs);
221 static fifo_segment_t *
222 segment_manager_get_segment_if_valid (segment_manager_t * sm,
225 if (pool_is_free_index (sm->segments, segment_index))
227 return pool_elt_at_index (sm->segments, segment_index);
231 * Removes segment after acquiring writer lock
234 segment_manager_lock_and_del_segment (segment_manager_t * sm, u32 fs_index)
239 clib_rwlock_writer_lock (&sm->segments_rwlock);
241 fs = segment_manager_get_segment_if_valid (sm, fs_index);
245 is_prealloc = fifo_segment_flags (fs) & FIFO_SEGMENT_F_IS_PREALLOCATED;
246 if (is_prealloc && !segment_manager_app_detached (sm))
249 segment_manager_del_segment (sm, fs);
252 clib_rwlock_writer_unlock (&sm->segments_rwlock);
256 * Reads a segment from the segment manager's pool without lock
259 segment_manager_get_segment (segment_manager_t * sm, u32 segment_index)
261 return pool_elt_at_index (sm->segments, segment_index);
265 segment_manager_segment_handle (segment_manager_t * sm,
266 fifo_segment_t * segment)
268 u32 segment_index = segment_manager_segment_index (sm, segment);
269 return (((u64) segment_manager_index (sm) << 32) | segment_index);
273 segment_manager_make_segment_handle (u32 segment_manager_index,
276 return (((u64) segment_manager_index << 32) | segment_index);
280 segment_manager_get_segment_w_handle (u64 segment_handle)
282 u32 sm_index, segment_index;
283 segment_manager_t *sm;
285 segment_manager_parse_segment_handle (segment_handle, &sm_index,
287 sm = segment_manager_get (sm_index);
288 if (!sm || pool_is_free_index (sm->segments, segment_index))
290 return pool_elt_at_index (sm->segments, segment_index);
294 * Reads a segment from the segment manager's pool and acquires reader lock
296 * Caller must drop the reader's lock by calling
297 * @ref segment_manager_segment_reader_unlock once it finishes working with
301 segment_manager_get_segment_w_lock (segment_manager_t * sm, u32 segment_index)
303 clib_rwlock_reader_lock (&sm->segments_rwlock);
304 return pool_elt_at_index (sm->segments, segment_index);
308 segment_manager_segment_reader_lock (segment_manager_t * sm)
310 clib_rwlock_reader_lock (&sm->segments_rwlock);
314 segment_manager_segment_reader_unlock (segment_manager_t * sm)
316 clib_rwlock_reader_unlock (&sm->segments_rwlock);
320 segment_manager_segment_writer_unlock (segment_manager_t * sm)
322 clib_rwlock_writer_unlock (&sm->segments_rwlock);
326 segment_manager_alloc (void)
328 segment_manager_main_t *smm = &sm_main;
329 segment_manager_t *sm;
331 pool_get_zero (smm->segment_managers, sm);
332 clib_rwlock_init (&sm->segments_rwlock);
337 * Initializes segment manager based on options provided.
338 * Returns error if ssvm segment(s) allocation fails.
341 segment_manager_init (segment_manager_t * sm)
343 segment_manager_props_t *props;
344 uword first_seg_size;
348 props = segment_manager_properties_get (sm);
349 first_seg_size = clib_max (props->segment_size,
350 sm_main.default_segment_size);
352 sm->max_fifo_size = props->max_fifo_size ?
353 props->max_fifo_size : sm_main.default_max_fifo_size;
354 sm->max_fifo_size = clib_max (sm->max_fifo_size, 4096);
356 segment_manager_set_watermarks (sm,
357 props->high_watermark,
358 props->low_watermark);
360 if (props->prealloc_fifos)
362 u64 approx_total_size, max_seg_size = ((u64) 1 << 32) - (128 << 10);
363 u32 rx_rounded_data_size, tx_rounded_data_size;
364 u32 prealloc_fifo_pairs = props->prealloc_fifos;
365 u32 rx_fifo_size, tx_fifo_size, pair_size;
366 u32 approx_segment_count;
368 /* Figure out how many segments should be preallocated */
369 rx_rounded_data_size = (1 << (max_log2 (props->rx_fifo_size)));
370 tx_rounded_data_size = (1 << (max_log2 (props->tx_fifo_size)));
372 rx_fifo_size = sizeof (svm_fifo_t) + rx_rounded_data_size;
373 tx_fifo_size = sizeof (svm_fifo_t) + tx_rounded_data_size;
374 pair_size = rx_fifo_size + tx_fifo_size;
376 approx_total_size = (u64) prealloc_fifo_pairs *pair_size;
377 if (first_seg_size > approx_total_size)
378 max_seg_size = first_seg_size;
379 approx_segment_count = (approx_total_size + (max_seg_size - 1))
382 /* Allocate the segments */
383 for (i = 0; i < approx_segment_count + 1; i++)
385 fs_index = segment_manager_add_segment (sm, max_seg_size);
388 clib_warning ("Failed to preallocate segment %d", i);
392 fs = segment_manager_get_segment (sm, fs_index);
394 sm->event_queue = segment_manager_alloc_queue (fs, props);
396 fifo_segment_preallocate_fifo_pairs (fs,
399 &prealloc_fifo_pairs);
400 fifo_segment_flags (fs) = FIFO_SEGMENT_F_IS_PREALLOCATED;
401 if (prealloc_fifo_pairs == 0)
407 fs_index = segment_manager_add_segment (sm, first_seg_size);
410 clib_warning ("Failed to allocate segment");
414 fs = segment_manager_get_segment (sm, fs_index);
415 sm->event_queue = segment_manager_alloc_queue (fs, props);
417 if (props->prealloc_fifo_hdrs)
421 /* Do not preallocate on slice associated to main thread */
422 i = (vlib_num_workers ()? 1 : 0);
423 hdrs_per_slice = props->prealloc_fifo_hdrs / (fs->n_slices - i);
425 for (; i < fs->n_slices; i++)
427 if (fifo_segment_prealloc_fifo_hdrs (fs, i, hdrs_per_slice))
428 return VNET_API_ERROR_SVM_SEGMENT_CREATE_FAIL;
436 segment_manager_cleanup_detached_listener (segment_manager_t * sm)
438 app_worker_t *app_wrk;
440 app_wrk = app_worker_get_if_valid (sm->app_wrk_index);
444 app_worker_del_detached_sm (app_wrk, segment_manager_index (sm));
448 * Cleanup segment manager.
451 segment_manager_free (segment_manager_t * sm)
453 segment_manager_main_t *smm = &sm_main;
454 fifo_segment_t *fifo_segment;
456 ASSERT (!segment_manager_has_fifos (sm)
457 && segment_manager_app_detached (sm));
459 if (sm->flags & SEG_MANAGER_F_DETACHED_LISTENER)
460 segment_manager_cleanup_detached_listener (sm);
462 /* If we have empty preallocated segments that haven't been removed, remove
463 * them now. Apart from that, the first segment in the first segment manager
464 * is not removed when all fifos are removed. It can only be removed when
465 * the manager is explicitly deleted/detached by the app. */
466 clib_rwlock_writer_lock (&sm->segments_rwlock);
469 pool_foreach (fifo_segment, sm->segments, ({
470 segment_manager_del_segment (sm, fifo_segment);
474 clib_rwlock_writer_unlock (&sm->segments_rwlock);
476 clib_rwlock_free (&sm->segments_rwlock);
478 clib_memset (sm, 0xfe, sizeof (*sm));
479 pool_put (smm->segment_managers, sm);
483 segment_manager_init_free (segment_manager_t * sm)
485 segment_manager_app_detach (sm);
486 if (segment_manager_has_fifos (sm))
487 segment_manager_del_sessions (sm);
490 ASSERT (!sm->first_is_protected || segment_manager_app_detached (sm));
491 segment_manager_free (sm);
496 segment_manager_get (u32 index)
498 return pool_elt_at_index (sm_main.segment_managers, index);
502 segment_manager_get_if_valid (u32 index)
504 if (pool_is_free_index (sm_main.segment_managers, index))
506 return pool_elt_at_index (sm_main.segment_managers, index);
510 segment_manager_index (segment_manager_t * sm)
512 return sm - sm_main.segment_managers;
516 segment_manager_has_fifos (segment_manager_t * sm)
522 segment_manager_foreach_segment_w_lock (seg, sm, ({
523 if (CLIB_DEBUG && !first && !fifo_segment_has_fifos (seg)
524 && !(fifo_segment_flags (seg) & FIFO_SEGMENT_F_IS_PREALLOCATED))
526 clib_warning ("segment %d has no fifos!",
527 segment_manager_segment_index (sm, seg));
530 if (fifo_segment_has_fifos (seg))
532 segment_manager_segment_reader_unlock (sm);
542 * Initiate disconnects for all sessions 'owned' by a segment manager
545 segment_manager_del_sessions (segment_manager_t * sm)
547 session_handle_t *handles = 0, *handle;
553 ASSERT (pool_elts (sm->segments) != 0);
555 /* Across all fifo segments used by the server */
557 segment_manager_foreach_segment_w_lock (fs, sm, ({
558 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
560 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
563 * Remove any residual sessions from the session lookup table
564 * Don't bother deleting the individual fifos, we're going to
565 * throw away the fifo segment in a minute.
569 session = session_get_if_valid (f->master_session_index,
570 f->master_thread_index);
572 vec_add1 (handles, session_handle (session));
577 /* Instead of removing the segment, test when cleaning up disconnected
578 * sessions if the segment can be removed.
583 vec_foreach (handle, handles)
585 session = session_get_from_handle (*handle);
586 session_close (session);
587 /* Avoid propagating notifications back to the app */
588 session->app_wrk_index = APP_INVALID_INDEX;
593 segment_manager_try_alloc_fifos (fifo_segment_t * fifo_segment,
595 u32 rx_fifo_size, u32 tx_fifo_size,
596 svm_fifo_t ** rx_fifo, svm_fifo_t ** tx_fifo)
598 rx_fifo_size = clib_max (rx_fifo_size, sm_main.default_fifo_size);
599 *rx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
601 FIFO_SEGMENT_RX_FIFO);
603 tx_fifo_size = clib_max (tx_fifo_size, sm_main.default_fifo_size);
604 *tx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
606 FIFO_SEGMENT_TX_FIFO);
610 /* This would be very odd, but handle it... */
613 fifo_segment_free_fifo (fifo_segment, *tx_fifo);
622 fifo_segment_free_fifo (fifo_segment, *rx_fifo);
632 segment_manager_alloc_session_fifos (segment_manager_t * sm,
634 svm_fifo_t ** rx_fifo,
635 svm_fifo_t ** tx_fifo)
637 int alloc_fail = 1, rv = 0, new_fs_index;
638 uword free_bytes, max_free_bytes = 0;
639 segment_manager_props_t *props;
640 fifo_segment_t *fs = 0, *cur;
641 u32 sm_index, fs_index;
642 u8 added_a_segment = 0;
645 props = segment_manager_properties_get (sm);
648 * Find the first free segment to allocate the fifos in
651 segment_manager_segment_reader_lock (sm);
654 pool_foreach (cur, sm->segments, ({
655 free_bytes = fifo_segment_available_bytes (cur);
656 if (free_bytes > max_free_bytes)
658 max_free_bytes = free_bytes;
666 alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index,
670 /* On success, keep lock until fifos are initialized */
675 segment_manager_segment_reader_unlock (sm);
684 ASSERT (rx_fifo && tx_fifo);
685 sm_index = segment_manager_index (sm);
686 fs_index = segment_manager_segment_index (sm, fs);
687 (*tx_fifo)->segment_manager = sm_index;
688 (*rx_fifo)->segment_manager = sm_index;
689 (*tx_fifo)->segment_index = fs_index;
690 (*rx_fifo)->segment_index = fs_index;
694 app_worker_t *app_wrk;
695 fs_handle = segment_manager_segment_handle (sm, fs);
696 app_wrk = app_worker_get (sm->app_wrk_index);
697 rv = app_worker_add_segment_notify (app_wrk, fs_handle);
699 /* Drop the lock after app is notified */
700 segment_manager_segment_reader_unlock (sm);
705 * Allocation failed, see if we can add a new segment
707 if (props->add_segment)
711 clib_warning ("Added a segment, still can't allocate a fifo");
712 segment_manager_segment_reader_unlock (sm);
713 return SESSION_E_SEG_NO_SPACE2;
715 if ((new_fs_index = segment_manager_add_segment (sm, 0)) < 0)
717 clib_warning ("Failed to add new segment");
718 return SESSION_E_SEG_CREATE;
720 fs = segment_manager_get_segment_w_lock (sm, new_fs_index);
721 alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index,
730 SESSION_DBG ("Can't add new seg and no space to allocate fifos!");
731 return SESSION_E_SEG_NO_SPACE;
736 segment_manager_dealloc_fifos (svm_fifo_t * rx_fifo, svm_fifo_t * tx_fifo)
738 segment_manager_t *sm;
742 if (!rx_fifo || !tx_fifo)
745 /* It's possible to have no segment manager if the session was removed
746 * as result of a detach. */
747 if (!(sm = segment_manager_get_if_valid (rx_fifo->segment_manager)))
750 segment_index = rx_fifo->segment_index;
751 fs = segment_manager_get_segment_w_lock (sm, segment_index);
752 fifo_segment_free_fifo (fs, rx_fifo);
753 fifo_segment_free_fifo (fs, tx_fifo);
756 * Try to remove svm segment if it has no fifos. This can be done only if
757 * the segment is not the first in the segment manager or if it is first
758 * and it is not protected. Moreover, if the segment is first and the app
759 * has detached from the segment manager, remove the segment manager.
761 if (!fifo_segment_has_fifos (fs))
763 segment_manager_segment_reader_unlock (sm);
765 /* Remove segment if it holds no fifos or first but not protected */
766 if (segment_index != 0 || !sm->first_is_protected)
767 segment_manager_lock_and_del_segment (sm, segment_index);
769 /* Remove segment manager if no sessions and detached from app */
770 if (segment_manager_app_detached (sm)
771 && !segment_manager_has_fifos (sm))
773 segment_manager_free (sm);
777 segment_manager_segment_reader_unlock (sm);
781 segment_manager_detach_fifo (segment_manager_t * sm, svm_fifo_t * f)
785 fs = segment_manager_get_segment_w_lock (sm, f->segment_index);
786 fifo_segment_detach_fifo (fs, f);
787 segment_manager_segment_reader_unlock (sm);
791 segment_manager_attach_fifo (segment_manager_t * sm, svm_fifo_t * f,
796 fs = segment_manager_get_segment_w_lock (sm, f->segment_index);
797 fifo_segment_attach_fifo (fs, f, s->thread_index);
798 segment_manager_segment_reader_unlock (sm);
800 f->master_session_index = s->session_index;
801 f->master_thread_index = s->thread_index;
805 segment_manager_evt_q_expected_size (u32 q_len)
807 u32 fifo_evt_size, notif_q_size, q_hdrs;
808 u32 msg_q_sz, fifo_evt_ring_sz, session_ntf_ring_sz;
810 fifo_evt_size = 1 << max_log2 (sizeof (session_event_t));
811 notif_q_size = clib_max (16, q_len >> 4);
813 msg_q_sz = q_len * sizeof (svm_msg_q_msg_t);
814 fifo_evt_ring_sz = q_len * fifo_evt_size;
815 session_ntf_ring_sz = notif_q_size * 256;
816 q_hdrs = sizeof (svm_queue_t) + sizeof (svm_msg_q_t);
818 return (msg_q_sz + fifo_evt_ring_sz + session_ntf_ring_sz + q_hdrs);
822 * Allocates shm queue in the first segment
824 * Must be called with lock held
827 segment_manager_alloc_queue (fifo_segment_t * segment,
828 segment_manager_props_t * props)
830 u32 fifo_evt_size, session_evt_size = 256, notif_q_size;
831 svm_msg_q_cfg_t _cfg, *cfg = &_cfg;
835 fifo_evt_size = sizeof (session_event_t);
836 notif_q_size = clib_max (16, props->evt_q_size >> 4);
838 svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = {
839 {props->evt_q_size, fifo_evt_size, 0},
840 {notif_q_size, session_evt_size, 0}
843 cfg->consumer_pid = 0;
845 cfg->q_nitems = props->evt_q_size;
848 oldheap = ssvm_push_heap (segment->ssvm.sh);
849 q = svm_msg_q_alloc (cfg);
850 fifo_segment_update_free_bytes (segment);
851 ssvm_pop_heap (oldheap);
853 if (props->use_mq_eventfd)
855 if (svm_msg_q_alloc_producer_eventfd (q))
856 clib_warning ("failed to alloc eventfd");
862 segment_manager_event_queue (segment_manager_t * sm)
864 return sm->event_queue;
868 * Frees shm queue allocated in the first segment
871 segment_manager_dealloc_queue (segment_manager_t * sm, svm_queue_t * q)
873 fifo_segment_t *segment;
874 ssvm_shared_header_t *sh;
877 ASSERT (!pool_is_free_index (sm->segments, 0));
879 segment = segment_manager_get_segment_w_lock (sm, 0);
880 sh = segment->ssvm.sh;
882 oldheap = ssvm_push_heap (sh);
884 ssvm_pop_heap (oldheap);
885 segment_manager_segment_reader_unlock (sm);
889 * Init segment vm address allocator
892 segment_manager_main_init (segment_manager_main_init_args_t * a)
894 segment_manager_main_t *sm = &sm_main;
895 clib_valloc_chunk_t _ip, *ip = &_ip;
897 ip->baseva = a->baseva;
900 clib_valloc_init (&sm->va_allocator, ip, 1 /* lock */ );
902 sm->default_fifo_size = 1 << 12;
903 sm->default_segment_size = 1 << 20;
904 sm->default_app_mq_size = 128;
905 sm->default_max_fifo_size = 4 << 20;
906 sm->default_high_watermark = 80;
907 sm->default_low_watermark = 50;
910 static clib_error_t *
911 segment_manager_show_fn (vlib_main_t * vm, unformat_input_t * input,
912 vlib_cli_command_t * cmd)
914 segment_manager_main_t *smm = &sm_main;
915 u8 show_segments = 0, verbose = 0;
917 segment_manager_t *sm;
919 app_worker_t *app_wrk;
923 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
925 if (unformat (input, "segments"))
927 else if (unformat (input, "verbose"))
930 return clib_error_return (0, "unknown input `%U'",
931 format_unformat_error, input);
933 vlib_cli_output (vm, "%d segment managers allocated",
934 pool_elts (smm->segment_managers));
935 if (verbose && pool_elts (smm->segment_managers))
937 vlib_cli_output (vm, "%-6s%=10s%=10s%=13s%=11s%=11s%=12s",
938 "Index", "AppIndex", "Segments", "MaxFifoSize",
939 "HighWater", "LowWater", "FifoTuning");
942 pool_foreach (sm, smm->segment_managers, ({
943 app_wrk = app_worker_get_if_valid (sm->app_wrk_index);
944 app = app_wrk ? application_get (app_wrk->app_index) : 0;
945 custom_logic = (app && (app->cb_fns.fifo_tuning_callback)) ? 1 : 0;
946 max_fifo_size = sm->max_fifo_size;
948 vlib_cli_output (vm, "%-6d%=10d%=10d%=13U%=11d%=11d%=12s",
949 segment_manager_index (sm),
950 sm->app_wrk_index, pool_elts (sm->segments),
951 format_memory_size, max_fifo_size,
952 sm->high_watermark, sm->low_watermark,
953 custom_logic ? "custom" : "none");
957 vlib_cli_output (vm, "\n");
961 vlib_cli_output (vm, "%U", format_fifo_segment, 0, verbose);
964 pool_foreach (sm, smm->segment_managers, ({
965 segment_manager_foreach_segment_w_lock (seg, sm, ({
966 vlib_cli_output (vm, "%U", format_fifo_segment, seg, verbose);
976 VLIB_CLI_COMMAND (segment_manager_show_command, static) =
978 .path = "show segment-manager",
979 .short_help = "show segment-manager [segments][verbose]",
980 .function = segment_manager_show_fn,
985 segment_manager_format_sessions (segment_manager_t * sm, int verbose)
987 vlib_main_t *vm = vlib_get_main ();
988 app_worker_t *app_wrk;
998 vlib_cli_output (vm, "%-40s%-20s%-15s%-10s", "Connection", "App",
999 "API Client", "SegManager");
1001 vlib_cli_output (vm, "%-40s%-20s", "Connection", "App");
1005 app_wrk = app_worker_get (sm->app_wrk_index);
1006 app_name = application_name_from_index (app_wrk->app_index);
1008 clib_rwlock_reader_lock (&sm->segments_rwlock);
1011 pool_foreach (fs, sm->segments, ({
1012 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
1014 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
1017 u32 session_index, thread_index;
1020 session_index = f->master_session_index;
1021 thread_index = f->master_thread_index;
1023 session = session_get (session_index, thread_index);
1024 str = format (0, "%U", format_session, session, verbose);
1027 s = format (s, "%-40s%-20s%-15u%-10u", str, app_name,
1028 app_wrk->api_client_index, app_wrk->connects_seg_manager);
1030 s = format (s, "%-40s%-20s", str, app_name);
1032 vlib_cli_output (vm, "%v", s);
1033 vec_reset_length (s);
1043 clib_rwlock_reader_unlock (&sm->segments_rwlock);
1047 segment_manager_set_watermarks (segment_manager_t * sm,
1048 u8 high_watermark, u8 low_watermark)
1050 ASSERT (high_watermark <= 100 && low_watermark <= 100 &&
1051 low_watermark <= high_watermark);
1053 sm->high_watermark = high_watermark;
1054 sm->low_watermark = low_watermark;
1058 * fd.io coding-style-patch-verification: ON
1061 * eval: (c-set-style "gnu")