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 u32 seg_name_counter; /**< Counter for segment names */
28 u32 default_fifo_size; /**< default rx/tx fifo size */
29 u32 default_segment_size; /**< default fifo segment size */
30 u32 default_app_mq_size; /**< default app msg q size */
31 u32 default_max_fifo_size; /**< default max fifo 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->max_fifo_size = sm_main.default_max_fifo_size;
60 props->high_watermark = sm_main.default_high_watermark;
61 props->low_watermark = sm_main.default_low_watermark;
62 props->n_slices = vlib_num_workers () + 1;
67 segment_manager_app_detached (segment_manager_t * sm)
69 return (sm->flags & SEG_MANAGER_F_DETACHED);
73 segment_manager_app_detach (segment_manager_t * sm)
75 sm->flags |= SEG_MANAGER_F_DETACHED;
79 segment_manager_segment_index (segment_manager_t * sm, fifo_segment_t * seg)
81 return (seg - sm->segments);
85 * Adds segment to segment manager's pool
87 * If needed a writer's lock is acquired before allocating a new segment
88 * to avoid affecting any of the segments pool readers.
91 segment_manager_add_segment_inline (segment_manager_t *sm, uword segment_size,
92 u8 notify_app, u8 flags)
94 segment_manager_main_t *smm = &sm_main;
95 segment_manager_props_t *props;
96 app_worker_t *app_wrk;
102 props = segment_manager_properties_get (sm);
103 app_wrk = app_worker_get (sm->app_wrk_index);
105 /* Not configured for addition of new segments and not first */
106 if (!props->add_segment && !segment_size)
108 clib_warning ("cannot allocate new segment");
109 return VNET_API_ERROR_INVALID_VALUE;
113 * Allocate fifo segment and grab lock if needed
115 if (vlib_num_workers ())
116 clib_rwlock_writer_lock (&sm->segments_rwlock);
118 pool_get_zero (sm->segments, fs);
121 * Allocate ssvm segment
123 segment_size = segment_size ? segment_size : props->add_segment_size;
124 /* add overhead to ensure the result segment size is at least
125 * of that requested */
127 sizeof (fifo_segment_header_t) +
128 vlib_thread_main.n_vlib_mains * sizeof (fifo_segment_slice_t) +
129 FIFO_SEGMENT_ALLOC_OVERHEAD;
130 segment_size = round_pow2 (segment_size, clib_mem_get_page_size ());
132 seg_name = format (0, "seg-%u-%u-%u%c", app_wrk->app_index,
133 app_wrk->wrk_index, smm->seg_name_counter++, 0);
135 fs->ssvm.ssvm_size = segment_size;
136 fs->ssvm.name = seg_name;
137 fs->ssvm.requested_va = 0;
139 if ((rv = ssvm_server_init (&fs->ssvm, props->segment_type)))
141 clib_warning ("svm_master_init ('%v', %u) failed", seg_name,
143 pool_put (sm->segments, fs);
148 * Initialize fifo segment
150 fs->n_slices = props->n_slices;
151 fifo_segment_init (fs);
154 * Save segment index before dropping lock, if any held
156 fs_index = fs - sm->segments;
159 * Set watermarks in segment
161 fs->high_watermark = sm->high_watermark;
162 fs->low_watermark = sm->low_watermark;
164 fs->flags &= ~FIFO_SEGMENT_F_MEM_LIMIT;
165 fs->h->pct_first_alloc = props->pct_first_alloc;
169 app_worker_t *app_wrk;
171 fs_handle = segment_manager_segment_handle (sm, fs);
172 app_wrk = app_worker_get (sm->app_wrk_index);
173 rv = app_worker_add_segment_notify (app_wrk, fs_handle);
182 if (vlib_num_workers ())
183 clib_rwlock_writer_unlock (&sm->segments_rwlock);
189 segment_manager_add_segment (segment_manager_t *sm, uword segment_size,
192 return segment_manager_add_segment_inline (sm, segment_size, notify_app, 0);
196 segment_manager_add_segment2 (segment_manager_t *sm, uword segment_size,
199 return segment_manager_add_segment_inline (sm, segment_size, 0, flags);
203 * Remove segment without lock
206 segment_manager_del_segment (segment_manager_t * sm, fifo_segment_t * fs)
208 if (ssvm_type (&fs->ssvm) != SSVM_SEGMENT_PRIVATE)
210 if (!segment_manager_app_detached (sm))
212 app_worker_t *app_wrk;
214 app_wrk = app_worker_get (sm->app_wrk_index);
215 segment_handle = segment_manager_segment_handle (sm, fs);
216 app_worker_del_segment_notify (app_wrk, segment_handle);
220 fifo_segment_cleanup (fs);
221 ssvm_delete (&fs->ssvm);
224 clib_memset (fs, 0xfb, sizeof (*fs));
225 pool_put (sm->segments, fs);
228 static fifo_segment_t *
229 segment_manager_get_segment_if_valid (segment_manager_t * sm,
232 if (pool_is_free_index (sm->segments, segment_index))
234 return pool_elt_at_index (sm->segments, segment_index);
238 * Removes segment after acquiring writer lock
241 sm_lock_and_del_segment_inline (segment_manager_t *sm, u32 fs_index,
247 clib_rwlock_writer_lock (&sm->segments_rwlock);
249 fs = segment_manager_get_segment_if_valid (sm, fs_index);
253 if (check_if_empty && fifo_segment_has_fifos (fs))
256 is_prealloc = fifo_segment_flags (fs) & FIFO_SEGMENT_F_IS_PREALLOCATED;
257 if (is_prealloc && !segment_manager_app_detached (sm))
260 segment_manager_del_segment (sm, fs);
263 clib_rwlock_writer_unlock (&sm->segments_rwlock);
267 segment_manager_lock_and_del_segment (segment_manager_t * sm, u32 fs_index)
269 sm_lock_and_del_segment_inline (sm, fs_index, 0 /* check_if_empty */);
273 * Reads a segment from the segment manager's pool without lock
276 segment_manager_get_segment (segment_manager_t * sm, u32 segment_index)
278 return pool_elt_at_index (sm->segments, segment_index);
282 segment_manager_segment_handle (segment_manager_t * sm,
283 fifo_segment_t * segment)
285 u32 segment_index = segment_manager_segment_index (sm, segment);
286 return (((u64) segment_manager_index (sm) << 32) | segment_index);
290 segment_manager_make_segment_handle (u32 segment_manager_index,
293 return (((u64) segment_manager_index << 32) | segment_index);
297 segment_manager_get_segment_w_handle (u64 segment_handle)
299 u32 sm_index, segment_index;
300 segment_manager_t *sm;
302 segment_manager_parse_segment_handle (segment_handle, &sm_index,
304 sm = segment_manager_get (sm_index);
305 if (!sm || pool_is_free_index (sm->segments, segment_index))
307 return pool_elt_at_index (sm->segments, segment_index);
311 * Reads a segment from the segment manager's pool and acquires reader lock
313 * Caller must drop the reader's lock by calling
314 * @ref segment_manager_segment_reader_unlock once it finishes working with
318 segment_manager_get_segment_w_lock (segment_manager_t * sm, u32 segment_index)
320 clib_rwlock_reader_lock (&sm->segments_rwlock);
321 return pool_elt_at_index (sm->segments, segment_index);
325 segment_manager_segment_reader_lock (segment_manager_t * sm)
327 clib_rwlock_reader_lock (&sm->segments_rwlock);
331 segment_manager_segment_reader_unlock (segment_manager_t * sm)
333 clib_rwlock_reader_unlock (&sm->segments_rwlock);
337 segment_manager_segment_writer_unlock (segment_manager_t * sm)
339 clib_rwlock_writer_unlock (&sm->segments_rwlock);
343 segment_manager_alloc (void)
345 segment_manager_main_t *smm = &sm_main;
346 segment_manager_t *sm;
348 pool_get_zero (smm->segment_managers, sm);
349 clib_rwlock_init (&sm->segments_rwlock);
354 segment_manager_init (segment_manager_t * sm)
356 segment_manager_props_t *props;
358 props = segment_manager_properties_get (sm);
360 sm->max_fifo_size = props->max_fifo_size ?
361 props->max_fifo_size : sm_main.default_max_fifo_size;
362 sm->max_fifo_size = clib_max (sm->max_fifo_size, 4096);
364 segment_manager_set_watermarks (sm,
365 props->high_watermark,
366 props->low_watermark);
371 * Initializes segment manager based on options provided.
372 * Returns error if ssvm segment(s) allocation fails.
375 segment_manager_init_first (segment_manager_t * sm)
377 segment_manager_props_t *props;
378 uword first_seg_size;
382 segment_manager_init (sm);
383 props = segment_manager_properties_get (sm);
384 first_seg_size = clib_max (props->segment_size,
385 sm_main.default_segment_size);
387 if (props->prealloc_fifos)
389 u64 approx_total_size, max_seg_size = ((u64) 1 << 32) - (128 << 10);
390 u32 rx_rounded_data_size, tx_rounded_data_size;
391 u32 prealloc_fifo_pairs = props->prealloc_fifos;
392 u32 rx_fifo_size, tx_fifo_size, pair_size;
393 u32 approx_segment_count;
395 /* Figure out how many segments should be preallocated */
396 rx_rounded_data_size = (1 << (max_log2 (props->rx_fifo_size)));
397 tx_rounded_data_size = (1 << (max_log2 (props->tx_fifo_size)));
399 rx_fifo_size = sizeof (svm_fifo_t) + rx_rounded_data_size;
400 tx_fifo_size = sizeof (svm_fifo_t) + tx_rounded_data_size;
401 pair_size = rx_fifo_size + tx_fifo_size;
403 approx_total_size = (u64) prealloc_fifo_pairs *pair_size;
404 if (first_seg_size > approx_total_size)
405 max_seg_size = first_seg_size;
406 approx_segment_count = (approx_total_size + (max_seg_size - 1))
409 /* Allocate the segments */
410 for (i = 0; i < approx_segment_count + 1; i++)
412 fs_index = segment_manager_add_segment (sm, max_seg_size, 0);
415 clib_warning ("Failed to preallocate segment %d", i);
419 fs = segment_manager_get_segment (sm, fs_index);
421 sm->event_queue = segment_manager_alloc_queue (fs, props);
423 fifo_segment_preallocate_fifo_pairs (fs,
426 &prealloc_fifo_pairs);
427 fifo_segment_flags (fs) = FIFO_SEGMENT_F_IS_PREALLOCATED;
428 if (prealloc_fifo_pairs == 0)
434 fs_index = segment_manager_add_segment (sm, first_seg_size, 0);
437 clib_warning ("Failed to allocate segment");
441 fs = segment_manager_get_segment (sm, fs_index);
442 sm->event_queue = segment_manager_alloc_queue (fs, props);
444 if (props->prealloc_fifo_hdrs)
448 /* Do not preallocate on slice associated to main thread */
449 i = (vlib_num_workers ()? 1 : 0);
450 hdrs_per_slice = props->prealloc_fifo_hdrs / (fs->n_slices - i);
452 for (; i < fs->n_slices; i++)
454 if (fifo_segment_prealloc_fifo_hdrs (fs, i, hdrs_per_slice))
455 return VNET_API_ERROR_SVM_SEGMENT_CREATE_FAIL;
463 segment_manager_cleanup_detached_listener (segment_manager_t * sm)
465 app_worker_t *app_wrk;
467 app_wrk = app_worker_get_if_valid (sm->app_wrk_index);
471 app_worker_del_detached_sm (app_wrk, segment_manager_index (sm));
475 * Cleanup segment manager.
478 segment_manager_free (segment_manager_t * sm)
480 segment_manager_main_t *smm = &sm_main;
481 fifo_segment_t *fifo_segment;
483 ASSERT (vlib_get_thread_index () == 0
484 && !segment_manager_has_fifos (sm)
485 && segment_manager_app_detached (sm));
487 if (sm->flags & SEG_MANAGER_F_DETACHED_LISTENER)
488 segment_manager_cleanup_detached_listener (sm);
490 /* If we have empty preallocated segments that haven't been removed, remove
491 * them now. Apart from that, the first segment in the first segment manager
492 * is not removed when all fifos are removed. It can only be removed when
493 * the manager is explicitly deleted/detached by the app. */
494 clib_rwlock_writer_lock (&sm->segments_rwlock);
497 pool_foreach (fifo_segment, sm->segments) {
498 segment_manager_del_segment (sm, fifo_segment);
502 pool_free (sm->segments);
503 clib_rwlock_writer_unlock (&sm->segments_rwlock);
505 clib_rwlock_free (&sm->segments_rwlock);
507 clib_memset (sm, 0xfe, sizeof (*sm));
508 pool_put (smm->segment_managers, sm);
512 sm_free_w_index_helper (void *arg)
514 u32 sm_index = *(u32 *) arg;
515 segment_manager_t *sm;
517 ASSERT (vlib_get_thread_index () == 0);
519 if ((sm = segment_manager_get_if_valid (sm_index)))
520 segment_manager_free (sm);
524 segment_manager_free_safe (segment_manager_t *sm)
526 if (!vlib_thread_is_main_w_barrier ())
528 u32 sm_index = segment_manager_index (sm);
529 vlib_rpc_call_main_thread (sm_free_w_index_helper, (u8 *) & sm_index,
534 segment_manager_free (sm);
539 segment_manager_init_free (segment_manager_t * sm)
541 ASSERT (vlib_get_thread_index () == 0);
543 segment_manager_app_detach (sm);
544 if (segment_manager_has_fifos (sm))
545 segment_manager_del_sessions (sm);
548 ASSERT (!sm->first_is_protected || segment_manager_app_detached (sm));
549 segment_manager_free (sm);
554 segment_manager_get (u32 index)
556 return pool_elt_at_index (sm_main.segment_managers, index);
560 segment_manager_get_if_valid (u32 index)
562 if (pool_is_free_index (sm_main.segment_managers, index))
564 return pool_elt_at_index (sm_main.segment_managers, index);
568 segment_manager_index (segment_manager_t * sm)
570 return sm - sm_main.segment_managers;
574 segment_manager_has_fifos (segment_manager_t * sm)
580 segment_manager_foreach_segment_w_lock (seg, sm, ({
581 if (CLIB_DEBUG && !first && !fifo_segment_has_fifos (seg)
582 && !(fifo_segment_flags (seg) & FIFO_SEGMENT_F_IS_PREALLOCATED))
584 clib_warning ("segment %d has no fifos!",
585 segment_manager_segment_index (sm, seg));
588 if (fifo_segment_has_fifos (seg))
590 segment_manager_segment_reader_unlock (sm);
600 * Initiate disconnects for all sessions 'owned' by a segment manager
603 segment_manager_del_sessions (segment_manager_t * sm)
605 session_handle_t *handles = 0, *handle;
611 ASSERT (pool_elts (sm->segments) != 0);
613 /* Across all fifo segments used by the server */
615 segment_manager_foreach_segment_w_lock (fs, sm, ({
616 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
618 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
621 * Remove any residual sessions from the session lookup table
622 * Don't bother deleting the individual fifos, we're going to
623 * throw away the fifo segment in a minute.
627 session = session_get_if_valid (f->shr->master_session_index,
628 f->master_thread_index);
630 vec_add1 (handles, session_handle (session));
635 /* Instead of removing the segment, test when cleaning up disconnected
636 * sessions if the segment can be removed.
641 vec_foreach (handle, handles)
643 session = session_get_from_handle (*handle);
644 session_close (session);
645 /* Avoid propagating notifications back to the app */
646 session->app_wrk_index = APP_INVALID_INDEX;
652 * Initiate disconnects for sessions in specified state 'owned' by a segment
656 segment_manager_del_sessions_filter (segment_manager_t *sm,
657 session_state_t *states)
659 session_handle_t *handles = 0, *handle;
665 ASSERT (pool_elts (sm->segments) != 0);
667 /* Across all fifo segments used by the server */
668 segment_manager_foreach_segment_w_lock (
670 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
672 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
675 session = session_get_if_valid (f->shr->master_session_index,
676 f->master_thread_index);
679 session_state_t *state;
680 vec_foreach (state, states)
682 if (session->session_state == *state)
684 vec_add1 (handles, session_handle (session));
694 vec_foreach (handle, handles)
696 session = session_get_from_handle (*handle);
697 session_close (session);
698 /* Avoid propagating notifications back to the app */
699 session->app_wrk_index = APP_INVALID_INDEX;
705 segment_manager_try_alloc_fifos (fifo_segment_t * fifo_segment,
707 u32 rx_fifo_size, u32 tx_fifo_size,
708 svm_fifo_t ** rx_fifo, svm_fifo_t ** tx_fifo)
710 rx_fifo_size = clib_max (rx_fifo_size, sm_main.default_fifo_size);
711 *rx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
713 FIFO_SEGMENT_RX_FIFO);
715 tx_fifo_size = clib_max (tx_fifo_size, sm_main.default_fifo_size);
716 *tx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
718 FIFO_SEGMENT_TX_FIFO);
722 /* This would be very odd, but handle it... */
725 fifo_segment_free_fifo (fifo_segment, *tx_fifo);
734 fifo_segment_free_fifo (fifo_segment, *rx_fifo);
744 segment_manager_alloc_session_fifos (segment_manager_t * sm,
746 svm_fifo_t ** rx_fifo,
747 svm_fifo_t ** tx_fifo)
749 int alloc_fail = 1, rv = 0, new_fs_index;
750 uword free_bytes, max_free_bytes = 0;
751 segment_manager_props_t *props;
752 fifo_segment_t *fs = 0, *cur;
753 u32 sm_index, fs_index;
755 props = segment_manager_properties_get (sm);
758 * Find the first free segment to allocate the fifos in
761 segment_manager_segment_reader_lock (sm);
763 pool_foreach (cur, sm->segments) {
764 if (fifo_segment_flags (cur) & FIFO_SEGMENT_F_CUSTOM_USE)
766 free_bytes = fifo_segment_available_bytes (cur);
767 if (free_bytes > max_free_bytes)
769 max_free_bytes = free_bytes;
776 alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index,
780 /* On success, keep lock until fifos are initialized */
785 segment_manager_segment_reader_unlock (sm);
788 * Allocation failed, see if we can add a new segment
790 if (props->add_segment)
792 if ((new_fs_index = segment_manager_add_segment (sm, 0, 1)) < 0)
794 clib_warning ("Failed to add new segment");
795 return SESSION_E_SEG_CREATE;
797 fs = segment_manager_get_segment_w_lock (sm, new_fs_index);
798 alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index,
804 clib_warning ("Added a segment, still can't allocate a fifo");
805 segment_manager_segment_reader_unlock (sm);
806 return SESSION_E_SEG_NO_SPACE2;
811 SESSION_DBG ("Can't add new seg and no space to allocate fifos!");
812 return SESSION_E_SEG_NO_SPACE;
816 ASSERT (rx_fifo && tx_fifo);
818 sm_index = segment_manager_index (sm);
819 fs_index = segment_manager_segment_index (sm, fs);
820 (*tx_fifo)->segment_manager = sm_index;
821 (*rx_fifo)->segment_manager = sm_index;
822 (*tx_fifo)->segment_index = fs_index;
823 (*rx_fifo)->segment_index = fs_index;
825 /* Drop the lock after app is notified */
826 segment_manager_segment_reader_unlock (sm);
832 segment_manager_dealloc_fifos (svm_fifo_t * rx_fifo, svm_fifo_t * tx_fifo)
834 segment_manager_t *sm;
839 if (!rx_fifo || !tx_fifo)
842 /* It's possible to have no segment manager if the session was removed
843 * as result of a detach. */
844 if (!(sm = segment_manager_get_if_valid (rx_fifo->segment_manager)))
847 segment_index = rx_fifo->segment_index;
848 fs = segment_manager_get_segment_w_lock (sm, segment_index);
849 fifo_segment_free_fifo (fs, rx_fifo);
850 fifo_segment_free_fifo (fs, tx_fifo);
853 * Try to remove fifo segment if it has no fifos. This can be done only if
854 * the segment is not the first in the segment manager or if it is first
855 * and it is not protected. Moreover, if the segment is first and the app
856 * has detached from the segment manager, remove the segment manager.
858 if (!fifo_segment_has_fifos (fs))
860 /* If first, remove only if not protected */
861 try_delete = segment_index != 0 || !sm->first_is_protected;
864 segment_manager_segment_reader_unlock (sm);
866 if (PREDICT_FALSE (try_delete))
868 /* Only remove if empty after writer lock acquired */
869 sm_lock_and_del_segment_inline (sm, segment_index,
870 1 /* check_if_empty */);
872 /* Remove segment manager if no sessions and detached from app */
873 if (segment_manager_app_detached (sm)
874 && !segment_manager_has_fifos (sm))
875 segment_manager_free_safe (sm);
880 segment_manager_detach_fifo (segment_manager_t *sm, svm_fifo_t **f)
884 fs = segment_manager_get_segment_w_lock (sm, (*f)->segment_index);
885 fifo_segment_detach_fifo (fs, f);
886 segment_manager_segment_reader_unlock (sm);
890 segment_manager_attach_fifo (segment_manager_t *sm, svm_fifo_t **f,
895 fs = segment_manager_get_segment_w_lock (sm, (*f)->segment_index);
896 fifo_segment_attach_fifo (fs, f, s->thread_index);
897 segment_manager_segment_reader_unlock (sm);
899 (*f)->shr->master_session_index = s->session_index;
900 (*f)->master_thread_index = s->thread_index;
904 segment_manager_evt_q_expected_size (u32 q_len)
906 u32 fifo_evt_size, notif_q_size, q_hdrs;
907 u32 msg_q_sz, fifo_evt_ring_sz, session_ntf_ring_sz;
909 fifo_evt_size = 1 << max_log2 (sizeof (session_event_t));
910 notif_q_size = clib_max (16, q_len >> 4);
912 msg_q_sz = q_len * sizeof (svm_msg_q_msg_t);
913 fifo_evt_ring_sz = q_len * fifo_evt_size;
914 session_ntf_ring_sz = notif_q_size * 256;
915 q_hdrs = sizeof (svm_queue_t) + sizeof (svm_msg_q_t);
917 return (msg_q_sz + fifo_evt_ring_sz + session_ntf_ring_sz + q_hdrs);
921 * Allocates shm queue in the first segment
923 * Must be called with lock held
926 segment_manager_alloc_queue (fifo_segment_t * segment,
927 segment_manager_props_t * props)
929 u32 fifo_evt_size, session_evt_size = 256, notif_q_size;
930 svm_msg_q_cfg_t _cfg, *cfg = &_cfg;
933 fifo_evt_size = sizeof (session_event_t);
934 notif_q_size = clib_max (16, props->evt_q_size >> 4);
936 svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = {
937 {props->evt_q_size, fifo_evt_size, 0},
938 {notif_q_size, session_evt_size, 0}
941 cfg->consumer_pid = 0;
943 cfg->q_nitems = props->evt_q_size;
946 q = fifo_segment_msg_q_alloc (segment, 0, cfg);
948 if (props->use_mq_eventfd)
950 if (svm_msg_q_alloc_eventfd (q))
951 clib_warning ("failed to alloc eventfd");
957 segment_manager_event_queue (segment_manager_t * sm)
959 return sm->event_queue;
963 * Frees shm queue allocated in the first segment
966 segment_manager_dealloc_queue (segment_manager_t * sm, svm_queue_t * q)
968 fifo_segment_t *segment;
969 ssvm_shared_header_t *sh;
972 ASSERT (!pool_is_free_index (sm->segments, 0));
974 segment = segment_manager_get_segment_w_lock (sm, 0);
975 sh = segment->ssvm.sh;
977 oldheap = ssvm_push_heap (sh);
979 ssvm_pop_heap (oldheap);
980 segment_manager_segment_reader_unlock (sm);
984 * Init segment vm address allocator
987 segment_manager_main_init (void)
989 segment_manager_main_t *sm = &sm_main;
991 sm->default_fifo_size = 1 << 12;
992 sm->default_segment_size = 1 << 20;
993 sm->default_app_mq_size = 128;
994 sm->default_max_fifo_size = 4 << 20;
995 sm->default_high_watermark = 80;
996 sm->default_low_watermark = 50;
1000 format_segment_manager (u8 *s, va_list *args)
1002 segment_manager_t *sm = va_arg (*args, segment_manager_t *);
1003 int verbose = va_arg (*args, int);
1004 app_worker_t *app_wrk;
1005 uword max_fifo_size;
1006 fifo_segment_t *seg;
1010 app_wrk = app_worker_get_if_valid (sm->app_wrk_index);
1011 app = app_wrk ? application_get (app_wrk->app_index) : 0;
1012 custom_logic = (app && (app->cb_fns.fifo_tuning_callback)) ? 1 : 0;
1013 max_fifo_size = sm->max_fifo_size;
1016 "[%u] %v app-wrk: %u segs: %u max-fifo-sz: %U "
1017 "wmarks: %u %u %s flags: 0x%x",
1018 segment_manager_index (sm), app->name, sm->app_wrk_index,
1019 pool_elts (sm->segments), format_memory_size, max_fifo_size,
1020 sm->high_watermark, sm->low_watermark,
1021 custom_logic ? "custom-tuning" : "no-tuning", sm->flags);
1023 if (!verbose || !pool_elts (sm->segments))
1026 s = format (s, "\n\n");
1028 segment_manager_foreach_segment_w_lock (
1029 seg, sm, ({ s = format (s, " *%U", format_fifo_segment, seg, verbose); }));
1034 static clib_error_t *
1035 segment_manager_show_fn (vlib_main_t * vm, unformat_input_t * input,
1036 vlib_cli_command_t * cmd)
1038 unformat_input_t _line_input, *line_input = &_line_input;
1039 segment_manager_main_t *smm = &sm_main;
1040 u8 show_segments = 0, verbose = 0;
1041 segment_manager_t *sm;
1044 if (!unformat_user (input, unformat_line_input, line_input))
1046 vlib_cli_output (vm, "%d segment managers allocated",
1047 pool_elts (smm->segment_managers));
1051 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1053 if (unformat (line_input, "segments"))
1055 else if (unformat (line_input, "verbose"))
1057 else if (unformat (line_input, "index %u", &sm_index))
1061 vlib_cli_output (vm, "unknown input [%U]", format_unformat_error,
1067 if (!pool_elts (smm->segment_managers))
1072 sm = segment_manager_get_if_valid (sm_index);
1075 vlib_cli_output (vm, "segment manager %u not allocated", sm_index);
1078 vlib_cli_output (vm, "%U", format_segment_manager, sm, 1 /* verbose */);
1082 if (verbose || show_segments)
1084 pool_foreach (sm, smm->segment_managers) {
1085 vlib_cli_output (vm, "%U", format_segment_manager, sm,
1089 vlib_cli_output (vm, "\n");
1094 unformat_free (line_input);
1100 VLIB_CLI_COMMAND (segment_manager_show_command, static) = {
1101 .path = "show segment-manager",
1102 .short_help = "show segment-manager [segments][verbose][index <nn>]",
1103 .function = segment_manager_show_fn,
1108 segment_manager_format_sessions (segment_manager_t * sm, int verbose)
1110 vlib_main_t *vm = vlib_get_main ();
1111 app_worker_t *app_wrk;
1121 vlib_cli_output (vm, "%-" SESSION_CLI_ID_LEN "s%-20s%-15s%-10s",
1122 "Connection", "App", "API Client", "SegManager");
1124 vlib_cli_output (vm, "%-" SESSION_CLI_ID_LEN "s%-20s", "Connection",
1129 app_wrk = app_worker_get (sm->app_wrk_index);
1130 app_name = application_name_from_index (app_wrk->app_index);
1132 clib_rwlock_reader_lock (&sm->segments_rwlock);
1135 pool_foreach (fs, sm->segments) {
1136 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
1138 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
1141 u32 session_index, thread_index;
1144 session_index = f->shr->master_session_index;
1145 thread_index = f->master_thread_index;
1147 session = session_get (session_index, thread_index);
1148 str = format (0, "%U", format_session, session, verbose);
1151 s = format (s, "%-" SESSION_CLI_ID_LEN "v%-20v%-15u%-10u", str,
1152 app_name, app_wrk->api_client_index,
1153 app_wrk->connects_seg_manager);
1155 s = format (s, "%-" SESSION_CLI_ID_LEN "v%-20v", str, app_name);
1157 vlib_cli_output (vm, "%v", s);
1158 vec_reset_length (s);
1168 clib_rwlock_reader_unlock (&sm->segments_rwlock);
1172 segment_manager_set_watermarks (segment_manager_t * sm,
1173 u8 high_watermark, u8 low_watermark)
1175 ASSERT (high_watermark <= 100 && low_watermark <= 100 &&
1176 low_watermark <= high_watermark);
1178 sm->high_watermark = high_watermark;
1179 sm->low_watermark = low_watermark;
1183 * fd.io coding-style-patch-verification: ON
1186 * eval: (c-set-style "gnu")