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 (segment_manager_t *sm, uword segment_size,
94 segment_manager_main_t *smm = &sm_main;
95 segment_manager_props_t *props;
101 props = segment_manager_properties_get (sm);
103 /* Not configured for addition of new segments and not first */
104 if (!props->add_segment && !segment_size)
106 clib_warning ("cannot allocate new segment");
107 return VNET_API_ERROR_INVALID_VALUE;
111 * Allocate fifo segment and grab lock if needed
113 if (vlib_num_workers ())
114 clib_rwlock_writer_lock (&sm->segments_rwlock);
116 pool_get_zero (sm->segments, fs);
119 * Allocate ssvm segment
121 segment_size = segment_size ? segment_size : props->add_segment_size;
122 segment_size = round_pow2 (segment_size, clib_mem_get_page_size ());
124 if (props->segment_type != SSVM_SEGMENT_PRIVATE)
126 seg_name = format (0, "%d-%d%c", getpid (), smm->seg_name_counter++, 0);
130 app_worker_t *app_wrk = app_worker_get (sm->app_wrk_index);
131 application_t *app = application_get (app_wrk->app_index);
132 seg_name = format (0, "%v segment%c", app->name, 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->h->high_watermark = sm->high_watermark;
162 fs->h->low_watermark = sm->low_watermark;
163 fs->h->pct_first_alloc = props->pct_first_alloc;
164 fs->h->flags &= ~FIFO_SEGMENT_F_MEM_LIMIT;
168 app_worker_t *app_wrk;
170 fs_handle = segment_manager_segment_handle (sm, fs);
171 app_wrk = app_worker_get (sm->app_wrk_index);
172 rv = app_worker_add_segment_notify (app_wrk, fs_handle);
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 if (ssvm_type (&fs->ssvm) != SSVM_SEGMENT_PRIVATE)
192 if (!segment_manager_app_detached (sm))
194 app_worker_t *app_wrk;
196 app_wrk = app_worker_get (sm->app_wrk_index);
197 segment_handle = segment_manager_segment_handle (sm, fs);
198 app_worker_del_segment_notify (app_wrk, segment_handle);
202 fifo_segment_cleanup (fs);
203 ssvm_delete (&fs->ssvm);
206 clib_memset (fs, 0xfb, sizeof (*fs));
207 pool_put (sm->segments, fs);
210 static fifo_segment_t *
211 segment_manager_get_segment_if_valid (segment_manager_t * sm,
214 if (pool_is_free_index (sm->segments, segment_index))
216 return pool_elt_at_index (sm->segments, segment_index);
220 * Removes segment after acquiring writer lock
223 sm_lock_and_del_segment_inline (segment_manager_t * sm, u32 fs_index)
228 clib_rwlock_writer_lock (&sm->segments_rwlock);
230 fs = segment_manager_get_segment_if_valid (sm, fs_index);
234 is_prealloc = fifo_segment_flags (fs) & FIFO_SEGMENT_F_IS_PREALLOCATED;
235 if (is_prealloc && !segment_manager_app_detached (sm))
238 segment_manager_del_segment (sm, fs);
241 clib_rwlock_writer_unlock (&sm->segments_rwlock);
245 segment_manager_lock_and_del_segment (segment_manager_t * sm, u32 fs_index)
247 sm_lock_and_del_segment_inline (sm, fs_index);
251 * Reads a segment from the segment manager's pool without lock
254 segment_manager_get_segment (segment_manager_t * sm, u32 segment_index)
256 return pool_elt_at_index (sm->segments, segment_index);
260 segment_manager_segment_handle (segment_manager_t * sm,
261 fifo_segment_t * segment)
263 u32 segment_index = segment_manager_segment_index (sm, segment);
264 return (((u64) segment_manager_index (sm) << 32) | segment_index);
268 segment_manager_make_segment_handle (u32 segment_manager_index,
271 return (((u64) segment_manager_index << 32) | segment_index);
275 segment_manager_get_segment_w_handle (u64 segment_handle)
277 u32 sm_index, segment_index;
278 segment_manager_t *sm;
280 segment_manager_parse_segment_handle (segment_handle, &sm_index,
282 sm = segment_manager_get (sm_index);
283 if (!sm || pool_is_free_index (sm->segments, segment_index))
285 return pool_elt_at_index (sm->segments, segment_index);
289 * Reads a segment from the segment manager's pool and acquires reader lock
291 * Caller must drop the reader's lock by calling
292 * @ref segment_manager_segment_reader_unlock once it finishes working with
296 segment_manager_get_segment_w_lock (segment_manager_t * sm, u32 segment_index)
298 clib_rwlock_reader_lock (&sm->segments_rwlock);
299 return pool_elt_at_index (sm->segments, segment_index);
303 segment_manager_segment_reader_lock (segment_manager_t * sm)
305 clib_rwlock_reader_lock (&sm->segments_rwlock);
309 segment_manager_segment_reader_unlock (segment_manager_t * sm)
311 clib_rwlock_reader_unlock (&sm->segments_rwlock);
315 segment_manager_segment_writer_unlock (segment_manager_t * sm)
317 clib_rwlock_writer_unlock (&sm->segments_rwlock);
321 segment_manager_alloc (void)
323 segment_manager_main_t *smm = &sm_main;
324 segment_manager_t *sm;
326 pool_get_zero (smm->segment_managers, sm);
327 clib_rwlock_init (&sm->segments_rwlock);
332 segment_manager_init (segment_manager_t * sm)
334 segment_manager_props_t *props;
336 props = segment_manager_properties_get (sm);
338 sm->max_fifo_size = props->max_fifo_size ?
339 props->max_fifo_size : sm_main.default_max_fifo_size;
340 sm->max_fifo_size = clib_max (sm->max_fifo_size, 4096);
342 segment_manager_set_watermarks (sm,
343 props->high_watermark,
344 props->low_watermark);
349 * Initializes segment manager based on options provided.
350 * Returns error if ssvm segment(s) allocation fails.
353 segment_manager_init_first (segment_manager_t * sm)
355 segment_manager_props_t *props;
356 uword first_seg_size;
360 segment_manager_init (sm);
361 props = segment_manager_properties_get (sm);
362 first_seg_size = clib_max (props->segment_size,
363 sm_main.default_segment_size);
365 if (props->prealloc_fifos)
367 u64 approx_total_size, max_seg_size = ((u64) 1 << 32) - (128 << 10);
368 u32 rx_rounded_data_size, tx_rounded_data_size;
369 u32 prealloc_fifo_pairs = props->prealloc_fifos;
370 u32 rx_fifo_size, tx_fifo_size, pair_size;
371 u32 approx_segment_count;
373 /* Figure out how many segments should be preallocated */
374 rx_rounded_data_size = (1 << (max_log2 (props->rx_fifo_size)));
375 tx_rounded_data_size = (1 << (max_log2 (props->tx_fifo_size)));
377 rx_fifo_size = sizeof (svm_fifo_t) + rx_rounded_data_size;
378 tx_fifo_size = sizeof (svm_fifo_t) + tx_rounded_data_size;
379 pair_size = rx_fifo_size + tx_fifo_size;
381 approx_total_size = (u64) prealloc_fifo_pairs *pair_size;
382 if (first_seg_size > approx_total_size)
383 max_seg_size = first_seg_size;
384 approx_segment_count = (approx_total_size + (max_seg_size - 1))
387 /* Allocate the segments */
388 for (i = 0; i < approx_segment_count + 1; i++)
390 fs_index = segment_manager_add_segment (sm, max_seg_size, 0);
393 clib_warning ("Failed to preallocate segment %d", i);
397 fs = segment_manager_get_segment (sm, fs_index);
399 sm->event_queue = segment_manager_alloc_queue (fs, props);
401 fifo_segment_preallocate_fifo_pairs (fs,
404 &prealloc_fifo_pairs);
405 fifo_segment_flags (fs) = FIFO_SEGMENT_F_IS_PREALLOCATED;
406 if (prealloc_fifo_pairs == 0)
412 fs_index = segment_manager_add_segment (sm, first_seg_size, 0);
415 clib_warning ("Failed to allocate segment");
419 fs = segment_manager_get_segment (sm, fs_index);
420 sm->event_queue = segment_manager_alloc_queue (fs, props);
422 if (props->prealloc_fifo_hdrs)
426 /* Do not preallocate on slice associated to main thread */
427 i = (vlib_num_workers ()? 1 : 0);
428 hdrs_per_slice = props->prealloc_fifo_hdrs / (fs->n_slices - i);
430 for (; i < fs->n_slices; i++)
432 if (fifo_segment_prealloc_fifo_hdrs (fs, i, hdrs_per_slice))
433 return VNET_API_ERROR_SVM_SEGMENT_CREATE_FAIL;
441 segment_manager_cleanup_detached_listener (segment_manager_t * sm)
443 app_worker_t *app_wrk;
445 app_wrk = app_worker_get_if_valid (sm->app_wrk_index);
449 app_worker_del_detached_sm (app_wrk, segment_manager_index (sm));
453 * Cleanup segment manager.
456 segment_manager_free (segment_manager_t * sm)
458 segment_manager_main_t *smm = &sm_main;
459 fifo_segment_t *fifo_segment;
461 ASSERT (vlib_get_thread_index () == 0
462 && !segment_manager_has_fifos (sm)
463 && segment_manager_app_detached (sm));
465 if (sm->flags & SEG_MANAGER_F_DETACHED_LISTENER)
466 segment_manager_cleanup_detached_listener (sm);
468 /* If we have empty preallocated segments that haven't been removed, remove
469 * them now. Apart from that, the first segment in the first segment manager
470 * is not removed when all fifos are removed. It can only be removed when
471 * the manager is explicitly deleted/detached by the app. */
472 clib_rwlock_writer_lock (&sm->segments_rwlock);
475 pool_foreach (fifo_segment, sm->segments) {
476 segment_manager_del_segment (sm, fifo_segment);
480 pool_free (sm->segments);
481 clib_rwlock_writer_unlock (&sm->segments_rwlock);
483 clib_rwlock_free (&sm->segments_rwlock);
485 clib_memset (sm, 0xfe, sizeof (*sm));
486 pool_put (smm->segment_managers, sm);
490 sm_free_w_index_helper (void *arg)
492 u32 sm_index = *(u32 *) arg;
493 segment_manager_t *sm;
495 ASSERT (vlib_get_thread_index () == 0);
497 if ((sm = segment_manager_get_if_valid (sm_index)))
498 segment_manager_free (sm);
502 segment_manager_free_safe (segment_manager_t * sm)
504 if (!vlib_thread_is_main_w_barrier ())
506 u32 sm_index = segment_manager_index (sm);
507 vlib_rpc_call_main_thread (sm_free_w_index_helper, (u8 *) & sm_index,
512 segment_manager_free (sm);
517 segment_manager_init_free (segment_manager_t * sm)
519 ASSERT (vlib_get_thread_index () == 0);
521 segment_manager_app_detach (sm);
522 if (segment_manager_has_fifos (sm))
523 segment_manager_del_sessions (sm);
526 ASSERT (!sm->first_is_protected || segment_manager_app_detached (sm));
527 segment_manager_free (sm);
532 segment_manager_get (u32 index)
534 return pool_elt_at_index (sm_main.segment_managers, index);
538 segment_manager_get_if_valid (u32 index)
540 if (pool_is_free_index (sm_main.segment_managers, index))
542 return pool_elt_at_index (sm_main.segment_managers, index);
546 segment_manager_index (segment_manager_t * sm)
548 return sm - sm_main.segment_managers;
552 segment_manager_has_fifos (segment_manager_t * sm)
558 segment_manager_foreach_segment_w_lock (seg, sm, ({
559 if (CLIB_DEBUG && !first && !fifo_segment_has_fifos (seg)
560 && !(fifo_segment_flags (seg) & FIFO_SEGMENT_F_IS_PREALLOCATED))
562 clib_warning ("segment %d has no fifos!",
563 segment_manager_segment_index (sm, seg));
566 if (fifo_segment_has_fifos (seg))
568 segment_manager_segment_reader_unlock (sm);
578 * Initiate disconnects for all sessions 'owned' by a segment manager
581 segment_manager_del_sessions (segment_manager_t * sm)
583 session_handle_t *handles = 0, *handle;
589 ASSERT (pool_elts (sm->segments) != 0);
591 /* Across all fifo segments used by the server */
593 segment_manager_foreach_segment_w_lock (fs, sm, ({
594 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
596 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
599 * Remove any residual sessions from the session lookup table
600 * Don't bother deleting the individual fifos, we're going to
601 * throw away the fifo segment in a minute.
605 session = session_get_if_valid (f->shr->master_session_index,
606 f->master_thread_index);
608 vec_add1 (handles, session_handle (session));
613 /* Instead of removing the segment, test when cleaning up disconnected
614 * sessions if the segment can be removed.
619 vec_foreach (handle, handles)
621 session = session_get_from_handle (*handle);
622 session_close (session);
623 /* Avoid propagating notifications back to the app */
624 session->app_wrk_index = APP_INVALID_INDEX;
630 * Initiate disconnects for sessions in specified state 'owned' by a segment
634 segment_manager_del_sessions_filter (segment_manager_t *sm,
635 session_state_t *states)
637 session_handle_t *handles = 0, *handle;
643 ASSERT (pool_elts (sm->segments) != 0);
645 /* Across all fifo segments used by the server */
646 segment_manager_foreach_segment_w_lock (
648 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
650 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
653 session = session_get_if_valid (f->shr->master_session_index,
654 f->master_thread_index);
657 session_state_t *state;
658 vec_foreach (state, states)
660 if (session->session_state == *state)
662 vec_add1 (handles, session_handle (session));
672 vec_foreach (handle, handles)
674 session = session_get_from_handle (*handle);
675 session_close (session);
676 /* Avoid propagating notifications back to the app */
677 session->app_wrk_index = APP_INVALID_INDEX;
683 segment_manager_try_alloc_fifos (fifo_segment_t * fifo_segment,
685 u32 rx_fifo_size, u32 tx_fifo_size,
686 svm_fifo_t ** rx_fifo, svm_fifo_t ** tx_fifo)
688 rx_fifo_size = clib_max (rx_fifo_size, sm_main.default_fifo_size);
689 *rx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
691 FIFO_SEGMENT_RX_FIFO);
693 tx_fifo_size = clib_max (tx_fifo_size, sm_main.default_fifo_size);
694 *tx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
696 FIFO_SEGMENT_TX_FIFO);
700 /* This would be very odd, but handle it... */
703 fifo_segment_free_fifo (fifo_segment, *tx_fifo);
712 fifo_segment_free_fifo (fifo_segment, *rx_fifo);
722 segment_manager_alloc_session_fifos (segment_manager_t * sm,
724 svm_fifo_t ** rx_fifo,
725 svm_fifo_t ** tx_fifo)
727 int alloc_fail = 1, rv = 0, new_fs_index;
728 uword free_bytes, max_free_bytes = 0;
729 segment_manager_props_t *props;
730 fifo_segment_t *fs = 0, *cur;
731 u32 sm_index, fs_index;
733 props = segment_manager_properties_get (sm);
736 * Find the first free segment to allocate the fifos in
739 segment_manager_segment_reader_lock (sm);
742 pool_foreach (cur, sm->segments) {
743 free_bytes = fifo_segment_available_bytes (cur);
744 if (free_bytes > max_free_bytes)
746 max_free_bytes = free_bytes;
754 alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index,
758 /* On success, keep lock until fifos are initialized */
763 segment_manager_segment_reader_unlock (sm);
766 * Allocation failed, see if we can add a new segment
768 if (props->add_segment)
770 if ((new_fs_index = segment_manager_add_segment (sm, 0, 1)) < 0)
772 clib_warning ("Failed to add new segment");
773 return SESSION_E_SEG_CREATE;
775 fs = segment_manager_get_segment_w_lock (sm, new_fs_index);
776 alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index,
782 clib_warning ("Added a segment, still can't allocate a fifo");
783 segment_manager_segment_reader_unlock (sm);
784 return SESSION_E_SEG_NO_SPACE2;
789 SESSION_DBG ("Can't add new seg and no space to allocate fifos!");
790 return SESSION_E_SEG_NO_SPACE;
794 ASSERT (rx_fifo && tx_fifo);
796 sm_index = segment_manager_index (sm);
797 fs_index = segment_manager_segment_index (sm, fs);
798 (*tx_fifo)->segment_manager = sm_index;
799 (*rx_fifo)->segment_manager = sm_index;
800 (*tx_fifo)->segment_index = fs_index;
801 (*rx_fifo)->segment_index = fs_index;
803 /* Drop the lock after app is notified */
804 segment_manager_segment_reader_unlock (sm);
810 segment_manager_dealloc_fifos (svm_fifo_t * rx_fifo, svm_fifo_t * tx_fifo)
812 segment_manager_t *sm;
816 if (!rx_fifo || !tx_fifo)
819 /* It's possible to have no segment manager if the session was removed
820 * as result of a detach. */
821 if (!(sm = segment_manager_get_if_valid (rx_fifo->segment_manager)))
824 segment_index = rx_fifo->segment_index;
825 fs = segment_manager_get_segment_w_lock (sm, segment_index);
826 fifo_segment_free_fifo (fs, rx_fifo);
827 fifo_segment_free_fifo (fs, tx_fifo);
830 * Try to remove svm segment if it has no fifos. This can be done only if
831 * the segment is not the first in the segment manager or if it is first
832 * and it is not protected. Moreover, if the segment is first and the app
833 * has detached from the segment manager, remove the segment manager.
835 if (!fifo_segment_has_fifos (fs))
837 segment_manager_segment_reader_unlock (sm);
839 /* Remove segment if it holds no fifos or first but not protected */
840 if (segment_index != 0 || !sm->first_is_protected)
841 sm_lock_and_del_segment_inline (sm, segment_index);
843 /* Remove segment manager if no sessions and detached from app */
844 if (segment_manager_app_detached (sm)
845 && !segment_manager_has_fifos (sm))
846 segment_manager_free_safe (sm);
849 segment_manager_segment_reader_unlock (sm);
853 segment_manager_detach_fifo (segment_manager_t *sm, svm_fifo_t **f)
857 fs = segment_manager_get_segment_w_lock (sm, (*f)->segment_index);
858 fifo_segment_detach_fifo (fs, f);
859 segment_manager_segment_reader_unlock (sm);
863 segment_manager_attach_fifo (segment_manager_t *sm, svm_fifo_t **f,
868 fs = segment_manager_get_segment_w_lock (sm, (*f)->segment_index);
869 fifo_segment_attach_fifo (fs, f, s->thread_index);
870 segment_manager_segment_reader_unlock (sm);
872 (*f)->shr->master_session_index = s->session_index;
873 (*f)->master_thread_index = s->thread_index;
877 segment_manager_evt_q_expected_size (u32 q_len)
879 u32 fifo_evt_size, notif_q_size, q_hdrs;
880 u32 msg_q_sz, fifo_evt_ring_sz, session_ntf_ring_sz;
882 fifo_evt_size = 1 << max_log2 (sizeof (session_event_t));
883 notif_q_size = clib_max (16, q_len >> 4);
885 msg_q_sz = q_len * sizeof (svm_msg_q_msg_t);
886 fifo_evt_ring_sz = q_len * fifo_evt_size;
887 session_ntf_ring_sz = notif_q_size * 256;
888 q_hdrs = sizeof (svm_queue_t) + sizeof (svm_msg_q_t);
890 return (msg_q_sz + fifo_evt_ring_sz + session_ntf_ring_sz + q_hdrs);
894 * Allocates shm queue in the first segment
896 * Must be called with lock held
899 segment_manager_alloc_queue (fifo_segment_t * segment,
900 segment_manager_props_t * props)
902 u32 fifo_evt_size, session_evt_size = 256, notif_q_size;
903 svm_msg_q_cfg_t _cfg, *cfg = &_cfg;
906 fifo_evt_size = sizeof (session_event_t);
907 notif_q_size = clib_max (16, props->evt_q_size >> 4);
909 svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = {
910 {props->evt_q_size, fifo_evt_size, 0},
911 {notif_q_size, session_evt_size, 0}
914 cfg->consumer_pid = 0;
916 cfg->q_nitems = props->evt_q_size;
919 q = fifo_segment_msg_q_alloc (segment, 0, cfg);
921 if (props->use_mq_eventfd)
923 if (svm_msg_q_alloc_eventfd (q))
924 clib_warning ("failed to alloc eventfd");
930 segment_manager_event_queue (segment_manager_t * sm)
932 return sm->event_queue;
936 * Frees shm queue allocated in the first segment
939 segment_manager_dealloc_queue (segment_manager_t * sm, svm_queue_t * q)
941 fifo_segment_t *segment;
942 ssvm_shared_header_t *sh;
945 ASSERT (!pool_is_free_index (sm->segments, 0));
947 segment = segment_manager_get_segment_w_lock (sm, 0);
948 sh = segment->ssvm.sh;
950 oldheap = ssvm_push_heap (sh);
952 ssvm_pop_heap (oldheap);
953 segment_manager_segment_reader_unlock (sm);
957 * Init segment vm address allocator
960 segment_manager_main_init (void)
962 segment_manager_main_t *sm = &sm_main;
964 sm->default_fifo_size = 1 << 12;
965 sm->default_segment_size = 1 << 20;
966 sm->default_app_mq_size = 128;
967 sm->default_max_fifo_size = 4 << 20;
968 sm->default_high_watermark = 80;
969 sm->default_low_watermark = 50;
972 static clib_error_t *
973 segment_manager_show_fn (vlib_main_t * vm, unformat_input_t * input,
974 vlib_cli_command_t * cmd)
976 segment_manager_main_t *smm = &sm_main;
977 u8 show_segments = 0, verbose = 0;
979 segment_manager_t *sm;
981 app_worker_t *app_wrk;
985 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
987 if (unformat (input, "segments"))
989 else if (unformat (input, "verbose"))
992 return clib_error_return (0, "unknown input `%U'",
993 format_unformat_error, input);
995 vlib_cli_output (vm, "%d segment managers allocated",
996 pool_elts (smm->segment_managers));
997 if (verbose && pool_elts (smm->segment_managers))
999 vlib_cli_output (vm, "%-6s%=10s%=10s%=13s%=11s%=11s%=12s",
1000 "Index", "AppIndex", "Segments", "MaxFifoSize",
1001 "HighWater", "LowWater", "FifoTuning");
1004 pool_foreach (sm, smm->segment_managers) {
1005 app_wrk = app_worker_get_if_valid (sm->app_wrk_index);
1006 app = app_wrk ? application_get (app_wrk->app_index) : 0;
1007 custom_logic = (app && (app->cb_fns.fifo_tuning_callback)) ? 1 : 0;
1008 max_fifo_size = sm->max_fifo_size;
1010 vlib_cli_output (vm, "%-6d%=10d%=10d%=13U%=11d%=11d%=12s",
1011 segment_manager_index (sm),
1012 sm->app_wrk_index, pool_elts (sm->segments),
1013 format_memory_size, max_fifo_size,
1014 sm->high_watermark, sm->low_watermark,
1015 custom_logic ? "custom" : "none");
1019 vlib_cli_output (vm, "\n");
1023 vlib_cli_output (vm, "%U", format_fifo_segment, 0, verbose);
1026 pool_foreach (sm, smm->segment_managers) {
1027 segment_manager_foreach_segment_w_lock (seg, sm, ({
1028 vlib_cli_output (vm, "%U", format_fifo_segment, seg, verbose);
1038 VLIB_CLI_COMMAND (segment_manager_show_command, static) =
1040 .path = "show segment-manager",
1041 .short_help = "show segment-manager [segments][verbose]",
1042 .function = segment_manager_show_fn,
1047 segment_manager_format_sessions (segment_manager_t * sm, int verbose)
1049 vlib_main_t *vm = vlib_get_main ();
1050 app_worker_t *app_wrk;
1060 vlib_cli_output (vm, "%-40s%-20s%-15s%-10s", "Connection", "App",
1061 "API Client", "SegManager");
1063 vlib_cli_output (vm, "%-40s%-20s", "Connection", "App");
1067 app_wrk = app_worker_get (sm->app_wrk_index);
1068 app_name = application_name_from_index (app_wrk->app_index);
1070 clib_rwlock_reader_lock (&sm->segments_rwlock);
1073 pool_foreach (fs, sm->segments) {
1074 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
1076 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
1079 u32 session_index, thread_index;
1082 session_index = f->shr->master_session_index;
1083 thread_index = f->master_thread_index;
1085 session = session_get (session_index, thread_index);
1086 str = format (0, "%U", format_session, session, verbose);
1089 s = format (s, "%-40v%-20v%-15u%-10u", str, app_name,
1090 app_wrk->api_client_index,
1091 app_wrk->connects_seg_manager);
1093 s = format (s, "%-40v%-20v", str, app_name);
1095 vlib_cli_output (vm, "%v", s);
1096 vec_reset_length (s);
1106 clib_rwlock_reader_unlock (&sm->segments_rwlock);
1110 segment_manager_set_watermarks (segment_manager_t * sm,
1111 u8 high_watermark, u8 low_watermark)
1113 ASSERT (high_watermark <= 100 && low_watermark <= 100 &&
1114 low_watermark <= high_watermark);
1116 sm->high_watermark = high_watermark;
1117 sm->low_watermark = low_watermark;
1121 * fd.io coding-style-patch-verification: ON
1124 * eval: (c-set-style "gnu")