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;
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 /* add overhead to ensure the result segment size is at least
123 * of that requested */
125 sizeof (fifo_segment_header_t) +
126 vlib_thread_main.n_vlib_mains * sizeof (fifo_segment_slice_t) +
127 FIFO_SEGMENT_ALLOC_OVERHEAD;
128 segment_size = round_pow2 (segment_size, clib_mem_get_page_size ());
130 if (props->segment_type != SSVM_SEGMENT_PRIVATE)
132 seg_name = format (0, "%d-%d%c", getpid (), smm->seg_name_counter++, 0);
136 app_worker_t *app_wrk = app_worker_get (sm->app_wrk_index);
137 application_t *app = application_get (app_wrk->app_index);
138 seg_name = format (0, "%v segment%c", app->name, 0);
141 fs->ssvm.ssvm_size = segment_size;
142 fs->ssvm.name = seg_name;
143 fs->ssvm.requested_va = 0;
145 if ((rv = ssvm_server_init (&fs->ssvm, props->segment_type)))
147 clib_warning ("svm_master_init ('%v', %u) failed", seg_name,
149 pool_put (sm->segments, fs);
154 * Initialize fifo segment
156 fs->n_slices = props->n_slices;
157 fifo_segment_init (fs);
160 * Save segment index before dropping lock, if any held
162 fs_index = fs - sm->segments;
165 * Set watermarks in segment
167 fs->high_watermark = sm->high_watermark;
168 fs->low_watermark = sm->low_watermark;
170 fs->flags &= ~FIFO_SEGMENT_F_MEM_LIMIT;
171 fs->h->pct_first_alloc = props->pct_first_alloc;
175 app_worker_t *app_wrk;
177 fs_handle = segment_manager_segment_handle (sm, fs);
178 app_wrk = app_worker_get (sm->app_wrk_index);
179 rv = app_worker_add_segment_notify (app_wrk, fs_handle);
188 if (vlib_num_workers ())
189 clib_rwlock_writer_unlock (&sm->segments_rwlock);
195 segment_manager_add_segment (segment_manager_t *sm, uword segment_size,
198 return segment_manager_add_segment_inline (sm, segment_size, notify_app, 0);
202 segment_manager_add_segment2 (segment_manager_t *sm, uword segment_size,
205 return segment_manager_add_segment_inline (sm, segment_size, 0, flags);
209 * Remove segment without lock
212 segment_manager_del_segment (segment_manager_t * sm, fifo_segment_t * fs)
214 if (ssvm_type (&fs->ssvm) != SSVM_SEGMENT_PRIVATE)
216 if (!segment_manager_app_detached (sm))
218 app_worker_t *app_wrk;
220 app_wrk = app_worker_get (sm->app_wrk_index);
221 segment_handle = segment_manager_segment_handle (sm, fs);
222 app_worker_del_segment_notify (app_wrk, segment_handle);
226 fifo_segment_cleanup (fs);
227 ssvm_delete (&fs->ssvm);
230 clib_memset (fs, 0xfb, sizeof (*fs));
231 pool_put (sm->segments, fs);
234 static fifo_segment_t *
235 segment_manager_get_segment_if_valid (segment_manager_t * sm,
238 if (pool_is_free_index (sm->segments, segment_index))
240 return pool_elt_at_index (sm->segments, segment_index);
244 * Removes segment after acquiring writer lock
247 sm_lock_and_del_segment_inline (segment_manager_t * sm, u32 fs_index)
252 clib_rwlock_writer_lock (&sm->segments_rwlock);
254 fs = segment_manager_get_segment_if_valid (sm, fs_index);
258 is_prealloc = fifo_segment_flags (fs) & FIFO_SEGMENT_F_IS_PREALLOCATED;
259 if (is_prealloc && !segment_manager_app_detached (sm))
262 segment_manager_del_segment (sm, fs);
265 clib_rwlock_writer_unlock (&sm->segments_rwlock);
269 segment_manager_lock_and_del_segment (segment_manager_t * sm, u32 fs_index)
271 sm_lock_and_del_segment_inline (sm, fs_index);
275 * Reads a segment from the segment manager's pool without lock
278 segment_manager_get_segment (segment_manager_t * sm, u32 segment_index)
280 return pool_elt_at_index (sm->segments, segment_index);
284 segment_manager_segment_handle (segment_manager_t * sm,
285 fifo_segment_t * segment)
287 u32 segment_index = segment_manager_segment_index (sm, segment);
288 return (((u64) segment_manager_index (sm) << 32) | segment_index);
292 segment_manager_make_segment_handle (u32 segment_manager_index,
295 return (((u64) segment_manager_index << 32) | segment_index);
299 segment_manager_get_segment_w_handle (u64 segment_handle)
301 u32 sm_index, segment_index;
302 segment_manager_t *sm;
304 segment_manager_parse_segment_handle (segment_handle, &sm_index,
306 sm = segment_manager_get (sm_index);
307 if (!sm || pool_is_free_index (sm->segments, segment_index))
309 return pool_elt_at_index (sm->segments, segment_index);
313 * Reads a segment from the segment manager's pool and acquires reader lock
315 * Caller must drop the reader's lock by calling
316 * @ref segment_manager_segment_reader_unlock once it finishes working with
320 segment_manager_get_segment_w_lock (segment_manager_t * sm, u32 segment_index)
322 clib_rwlock_reader_lock (&sm->segments_rwlock);
323 return pool_elt_at_index (sm->segments, segment_index);
327 segment_manager_segment_reader_lock (segment_manager_t * sm)
329 clib_rwlock_reader_lock (&sm->segments_rwlock);
333 segment_manager_segment_reader_unlock (segment_manager_t * sm)
335 clib_rwlock_reader_unlock (&sm->segments_rwlock);
339 segment_manager_segment_writer_unlock (segment_manager_t * sm)
341 clib_rwlock_writer_unlock (&sm->segments_rwlock);
345 segment_manager_alloc (void)
347 segment_manager_main_t *smm = &sm_main;
348 segment_manager_t *sm;
350 pool_get_zero (smm->segment_managers, sm);
351 clib_rwlock_init (&sm->segments_rwlock);
356 segment_manager_init (segment_manager_t * sm)
358 segment_manager_props_t *props;
360 props = segment_manager_properties_get (sm);
362 sm->max_fifo_size = props->max_fifo_size ?
363 props->max_fifo_size : sm_main.default_max_fifo_size;
364 sm->max_fifo_size = clib_max (sm->max_fifo_size, 4096);
366 segment_manager_set_watermarks (sm,
367 props->high_watermark,
368 props->low_watermark);
373 * Initializes segment manager based on options provided.
374 * Returns error if ssvm segment(s) allocation fails.
377 segment_manager_init_first (segment_manager_t * sm)
379 segment_manager_props_t *props;
380 uword first_seg_size;
384 segment_manager_init (sm);
385 props = segment_manager_properties_get (sm);
386 first_seg_size = clib_max (props->segment_size,
387 sm_main.default_segment_size);
389 if (props->prealloc_fifos)
391 u64 approx_total_size, max_seg_size = ((u64) 1 << 32) - (128 << 10);
392 u32 rx_rounded_data_size, tx_rounded_data_size;
393 u32 prealloc_fifo_pairs = props->prealloc_fifos;
394 u32 rx_fifo_size, tx_fifo_size, pair_size;
395 u32 approx_segment_count;
397 /* Figure out how many segments should be preallocated */
398 rx_rounded_data_size = (1 << (max_log2 (props->rx_fifo_size)));
399 tx_rounded_data_size = (1 << (max_log2 (props->tx_fifo_size)));
401 rx_fifo_size = sizeof (svm_fifo_t) + rx_rounded_data_size;
402 tx_fifo_size = sizeof (svm_fifo_t) + tx_rounded_data_size;
403 pair_size = rx_fifo_size + tx_fifo_size;
405 approx_total_size = (u64) prealloc_fifo_pairs *pair_size;
406 if (first_seg_size > approx_total_size)
407 max_seg_size = first_seg_size;
408 approx_segment_count = (approx_total_size + (max_seg_size - 1))
411 /* Allocate the segments */
412 for (i = 0; i < approx_segment_count + 1; i++)
414 fs_index = segment_manager_add_segment (sm, max_seg_size, 0);
417 clib_warning ("Failed to preallocate segment %d", i);
421 fs = segment_manager_get_segment (sm, fs_index);
423 sm->event_queue = segment_manager_alloc_queue (fs, props);
425 fifo_segment_preallocate_fifo_pairs (fs,
428 &prealloc_fifo_pairs);
429 fifo_segment_flags (fs) = FIFO_SEGMENT_F_IS_PREALLOCATED;
430 if (prealloc_fifo_pairs == 0)
436 fs_index = segment_manager_add_segment (sm, first_seg_size, 0);
439 clib_warning ("Failed to allocate segment");
443 fs = segment_manager_get_segment (sm, fs_index);
444 sm->event_queue = segment_manager_alloc_queue (fs, props);
446 if (props->prealloc_fifo_hdrs)
450 /* Do not preallocate on slice associated to main thread */
451 i = (vlib_num_workers ()? 1 : 0);
452 hdrs_per_slice = props->prealloc_fifo_hdrs / (fs->n_slices - i);
454 for (; i < fs->n_slices; i++)
456 if (fifo_segment_prealloc_fifo_hdrs (fs, i, hdrs_per_slice))
457 return VNET_API_ERROR_SVM_SEGMENT_CREATE_FAIL;
465 segment_manager_cleanup_detached_listener (segment_manager_t * sm)
467 app_worker_t *app_wrk;
469 app_wrk = app_worker_get_if_valid (sm->app_wrk_index);
473 app_worker_del_detached_sm (app_wrk, segment_manager_index (sm));
477 * Cleanup segment manager.
480 segment_manager_free (segment_manager_t * sm)
482 segment_manager_main_t *smm = &sm_main;
483 fifo_segment_t *fifo_segment;
485 ASSERT (vlib_get_thread_index () == 0
486 && !segment_manager_has_fifos (sm)
487 && segment_manager_app_detached (sm));
489 if (sm->flags & SEG_MANAGER_F_DETACHED_LISTENER)
490 segment_manager_cleanup_detached_listener (sm);
492 /* If we have empty preallocated segments that haven't been removed, remove
493 * them now. Apart from that, the first segment in the first segment manager
494 * is not removed when all fifos are removed. It can only be removed when
495 * the manager is explicitly deleted/detached by the app. */
496 clib_rwlock_writer_lock (&sm->segments_rwlock);
499 pool_foreach (fifo_segment, sm->segments) {
500 segment_manager_del_segment (sm, fifo_segment);
504 pool_free (sm->segments);
505 clib_rwlock_writer_unlock (&sm->segments_rwlock);
507 clib_rwlock_free (&sm->segments_rwlock);
509 clib_memset (sm, 0xfe, sizeof (*sm));
510 pool_put (smm->segment_managers, sm);
514 sm_free_w_index_helper (void *arg)
516 u32 sm_index = *(u32 *) arg;
517 segment_manager_t *sm;
519 ASSERT (vlib_get_thread_index () == 0);
521 if ((sm = segment_manager_get_if_valid (sm_index)))
522 segment_manager_free (sm);
526 segment_manager_free_safe (segment_manager_t *sm)
528 if (!vlib_thread_is_main_w_barrier ())
530 u32 sm_index = segment_manager_index (sm);
531 vlib_rpc_call_main_thread (sm_free_w_index_helper, (u8 *) & sm_index,
536 segment_manager_free (sm);
541 segment_manager_init_free (segment_manager_t * sm)
543 ASSERT (vlib_get_thread_index () == 0);
545 segment_manager_app_detach (sm);
546 if (segment_manager_has_fifos (sm))
547 segment_manager_del_sessions (sm);
550 ASSERT (!sm->first_is_protected || segment_manager_app_detached (sm));
551 segment_manager_free (sm);
556 segment_manager_get (u32 index)
558 return pool_elt_at_index (sm_main.segment_managers, index);
562 segment_manager_get_if_valid (u32 index)
564 if (pool_is_free_index (sm_main.segment_managers, index))
566 return pool_elt_at_index (sm_main.segment_managers, index);
570 segment_manager_index (segment_manager_t * sm)
572 return sm - sm_main.segment_managers;
576 segment_manager_has_fifos (segment_manager_t * sm)
582 segment_manager_foreach_segment_w_lock (seg, sm, ({
583 if (CLIB_DEBUG && !first && !fifo_segment_has_fifos (seg)
584 && !(fifo_segment_flags (seg) & FIFO_SEGMENT_F_IS_PREALLOCATED))
586 clib_warning ("segment %d has no fifos!",
587 segment_manager_segment_index (sm, seg));
590 if (fifo_segment_has_fifos (seg))
592 segment_manager_segment_reader_unlock (sm);
602 * Initiate disconnects for all sessions 'owned' by a segment manager
605 segment_manager_del_sessions (segment_manager_t * sm)
607 session_handle_t *handles = 0, *handle;
613 ASSERT (pool_elts (sm->segments) != 0);
615 /* Across all fifo segments used by the server */
617 segment_manager_foreach_segment_w_lock (fs, sm, ({
618 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
620 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
623 * Remove any residual sessions from the session lookup table
624 * Don't bother deleting the individual fifos, we're going to
625 * throw away the fifo segment in a minute.
629 session = session_get_if_valid (f->shr->master_session_index,
630 f->master_thread_index);
632 vec_add1 (handles, session_handle (session));
637 /* Instead of removing the segment, test when cleaning up disconnected
638 * sessions if the segment can be removed.
643 vec_foreach (handle, handles)
645 session = session_get_from_handle (*handle);
646 session_close (session);
647 /* Avoid propagating notifications back to the app */
648 session->app_wrk_index = APP_INVALID_INDEX;
654 * Initiate disconnects for sessions in specified state 'owned' by a segment
658 segment_manager_del_sessions_filter (segment_manager_t *sm,
659 session_state_t *states)
661 session_handle_t *handles = 0, *handle;
667 ASSERT (pool_elts (sm->segments) != 0);
669 /* Across all fifo segments used by the server */
670 segment_manager_foreach_segment_w_lock (
672 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
674 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
677 session = session_get_if_valid (f->shr->master_session_index,
678 f->master_thread_index);
681 session_state_t *state;
682 vec_foreach (state, states)
684 if (session->session_state == *state)
686 vec_add1 (handles, session_handle (session));
696 vec_foreach (handle, handles)
698 session = session_get_from_handle (*handle);
699 session_close (session);
700 /* Avoid propagating notifications back to the app */
701 session->app_wrk_index = APP_INVALID_INDEX;
707 segment_manager_try_alloc_fifos (fifo_segment_t * fifo_segment,
709 u32 rx_fifo_size, u32 tx_fifo_size,
710 svm_fifo_t ** rx_fifo, svm_fifo_t ** tx_fifo)
712 rx_fifo_size = clib_max (rx_fifo_size, sm_main.default_fifo_size);
713 *rx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
715 FIFO_SEGMENT_RX_FIFO);
717 tx_fifo_size = clib_max (tx_fifo_size, sm_main.default_fifo_size);
718 *tx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
720 FIFO_SEGMENT_TX_FIFO);
724 /* This would be very odd, but handle it... */
727 fifo_segment_free_fifo (fifo_segment, *tx_fifo);
736 fifo_segment_free_fifo (fifo_segment, *rx_fifo);
746 segment_manager_alloc_session_fifos (segment_manager_t * sm,
748 svm_fifo_t ** rx_fifo,
749 svm_fifo_t ** tx_fifo)
751 int alloc_fail = 1, rv = 0, new_fs_index;
752 uword free_bytes, max_free_bytes = 0;
753 segment_manager_props_t *props;
754 fifo_segment_t *fs = 0, *cur;
755 u32 sm_index, fs_index;
757 props = segment_manager_properties_get (sm);
760 * Find the first free segment to allocate the fifos in
763 segment_manager_segment_reader_lock (sm);
765 pool_foreach (cur, sm->segments) {
766 if (fifo_segment_flags (cur) & FIFO_SEGMENT_F_CUSTOM_USE)
768 free_bytes = fifo_segment_available_bytes (cur);
769 if (free_bytes > max_free_bytes)
771 max_free_bytes = free_bytes;
778 alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index,
782 /* On success, keep lock until fifos are initialized */
787 segment_manager_segment_reader_unlock (sm);
790 * Allocation failed, see if we can add a new segment
792 if (props->add_segment)
794 if ((new_fs_index = segment_manager_add_segment (sm, 0, 1)) < 0)
796 clib_warning ("Failed to add new segment");
797 return SESSION_E_SEG_CREATE;
799 fs = segment_manager_get_segment_w_lock (sm, new_fs_index);
800 alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index,
806 clib_warning ("Added a segment, still can't allocate a fifo");
807 segment_manager_segment_reader_unlock (sm);
808 return SESSION_E_SEG_NO_SPACE2;
813 SESSION_DBG ("Can't add new seg and no space to allocate fifos!");
814 return SESSION_E_SEG_NO_SPACE;
818 ASSERT (rx_fifo && tx_fifo);
820 sm_index = segment_manager_index (sm);
821 fs_index = segment_manager_segment_index (sm, fs);
822 (*tx_fifo)->segment_manager = sm_index;
823 (*rx_fifo)->segment_manager = sm_index;
824 (*tx_fifo)->segment_index = fs_index;
825 (*rx_fifo)->segment_index = fs_index;
827 /* Drop the lock after app is notified */
828 segment_manager_segment_reader_unlock (sm);
834 segment_manager_dealloc_fifos (svm_fifo_t * rx_fifo, svm_fifo_t * tx_fifo)
836 segment_manager_t *sm;
840 if (!rx_fifo || !tx_fifo)
843 /* It's possible to have no segment manager if the session was removed
844 * as result of a detach. */
845 if (!(sm = segment_manager_get_if_valid (rx_fifo->segment_manager)))
848 segment_index = rx_fifo->segment_index;
849 fs = segment_manager_get_segment_w_lock (sm, segment_index);
850 fifo_segment_free_fifo (fs, rx_fifo);
851 fifo_segment_free_fifo (fs, tx_fifo);
854 * Try to remove svm segment if it has no fifos. This can be done only if
855 * the segment is not the first in the segment manager or if it is first
856 * and it is not protected. Moreover, if the segment is first and the app
857 * has detached from the segment manager, remove the segment manager.
859 if (!fifo_segment_has_fifos (fs))
861 segment_manager_segment_reader_unlock (sm);
863 /* Remove segment if it holds no fifos or first but not protected */
864 if (segment_index != 0 || !sm->first_is_protected)
865 sm_lock_and_del_segment_inline (sm, segment_index);
867 /* Remove segment manager if no sessions and detached from app */
868 if (segment_manager_app_detached (sm)
869 && !segment_manager_has_fifos (sm))
870 segment_manager_free_safe (sm);
873 segment_manager_segment_reader_unlock (sm);
877 segment_manager_detach_fifo (segment_manager_t *sm, svm_fifo_t **f)
881 fs = segment_manager_get_segment_w_lock (sm, (*f)->segment_index);
882 fifo_segment_detach_fifo (fs, f);
883 segment_manager_segment_reader_unlock (sm);
887 segment_manager_attach_fifo (segment_manager_t *sm, svm_fifo_t **f,
892 fs = segment_manager_get_segment_w_lock (sm, (*f)->segment_index);
893 fifo_segment_attach_fifo (fs, f, s->thread_index);
894 segment_manager_segment_reader_unlock (sm);
896 (*f)->shr->master_session_index = s->session_index;
897 (*f)->master_thread_index = s->thread_index;
901 segment_manager_evt_q_expected_size (u32 q_len)
903 u32 fifo_evt_size, notif_q_size, q_hdrs;
904 u32 msg_q_sz, fifo_evt_ring_sz, session_ntf_ring_sz;
906 fifo_evt_size = 1 << max_log2 (sizeof (session_event_t));
907 notif_q_size = clib_max (16, q_len >> 4);
909 msg_q_sz = q_len * sizeof (svm_msg_q_msg_t);
910 fifo_evt_ring_sz = q_len * fifo_evt_size;
911 session_ntf_ring_sz = notif_q_size * 256;
912 q_hdrs = sizeof (svm_queue_t) + sizeof (svm_msg_q_t);
914 return (msg_q_sz + fifo_evt_ring_sz + session_ntf_ring_sz + q_hdrs);
918 * Allocates shm queue in the first segment
920 * Must be called with lock held
923 segment_manager_alloc_queue (fifo_segment_t * segment,
924 segment_manager_props_t * props)
926 u32 fifo_evt_size, session_evt_size = 256, notif_q_size;
927 svm_msg_q_cfg_t _cfg, *cfg = &_cfg;
930 fifo_evt_size = sizeof (session_event_t);
931 notif_q_size = clib_max (16, props->evt_q_size >> 4);
933 svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = {
934 {props->evt_q_size, fifo_evt_size, 0},
935 {notif_q_size, session_evt_size, 0}
938 cfg->consumer_pid = 0;
940 cfg->q_nitems = props->evt_q_size;
943 q = fifo_segment_msg_q_alloc (segment, 0, cfg);
945 if (props->use_mq_eventfd)
947 if (svm_msg_q_alloc_eventfd (q))
948 clib_warning ("failed to alloc eventfd");
954 segment_manager_event_queue (segment_manager_t * sm)
956 return sm->event_queue;
960 * Frees shm queue allocated in the first segment
963 segment_manager_dealloc_queue (segment_manager_t * sm, svm_queue_t * q)
965 fifo_segment_t *segment;
966 ssvm_shared_header_t *sh;
969 ASSERT (!pool_is_free_index (sm->segments, 0));
971 segment = segment_manager_get_segment_w_lock (sm, 0);
972 sh = segment->ssvm.sh;
974 oldheap = ssvm_push_heap (sh);
976 ssvm_pop_heap (oldheap);
977 segment_manager_segment_reader_unlock (sm);
981 * Init segment vm address allocator
984 segment_manager_main_init (void)
986 segment_manager_main_t *sm = &sm_main;
988 sm->default_fifo_size = 1 << 12;
989 sm->default_segment_size = 1 << 20;
990 sm->default_app_mq_size = 128;
991 sm->default_max_fifo_size = 4 << 20;
992 sm->default_high_watermark = 80;
993 sm->default_low_watermark = 50;
996 static clib_error_t *
997 segment_manager_show_fn (vlib_main_t * vm, unformat_input_t * input,
998 vlib_cli_command_t * cmd)
1000 segment_manager_main_t *smm = &sm_main;
1001 u8 show_segments = 0, verbose = 0;
1002 uword max_fifo_size;
1003 segment_manager_t *sm;
1004 fifo_segment_t *seg;
1005 app_worker_t *app_wrk;
1009 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1011 if (unformat (input, "segments"))
1013 else if (unformat (input, "verbose"))
1016 return clib_error_return (0, "unknown input `%U'",
1017 format_unformat_error, input);
1019 vlib_cli_output (vm, "%d segment managers allocated",
1020 pool_elts (smm->segment_managers));
1021 if (verbose && pool_elts (smm->segment_managers))
1023 vlib_cli_output (vm, "%-6s%=10s%=10s%=13s%=11s%=11s%=12s",
1024 "Index", "AppIndex", "Segments", "MaxFifoSize",
1025 "HighWater", "LowWater", "FifoTuning");
1028 pool_foreach (sm, smm->segment_managers) {
1029 app_wrk = app_worker_get_if_valid (sm->app_wrk_index);
1030 app = app_wrk ? application_get (app_wrk->app_index) : 0;
1031 custom_logic = (app && (app->cb_fns.fifo_tuning_callback)) ? 1 : 0;
1032 max_fifo_size = sm->max_fifo_size;
1034 vlib_cli_output (vm, "%-6d%=10d%=10d%=13U%=11d%=11d%=12s",
1035 segment_manager_index (sm),
1036 sm->app_wrk_index, pool_elts (sm->segments),
1037 format_memory_size, max_fifo_size,
1038 sm->high_watermark, sm->low_watermark,
1039 custom_logic ? "custom" : "none");
1043 vlib_cli_output (vm, "\n");
1047 vlib_cli_output (vm, "%U", format_fifo_segment, 0, verbose);
1050 pool_foreach (sm, smm->segment_managers) {
1051 segment_manager_foreach_segment_w_lock (seg, sm, ({
1052 vlib_cli_output (vm, "%U", format_fifo_segment, seg, verbose);
1062 VLIB_CLI_COMMAND (segment_manager_show_command, static) =
1064 .path = "show segment-manager",
1065 .short_help = "show segment-manager [segments][verbose]",
1066 .function = segment_manager_show_fn,
1071 segment_manager_format_sessions (segment_manager_t * sm, int verbose)
1073 vlib_main_t *vm = vlib_get_main ();
1074 app_worker_t *app_wrk;
1084 vlib_cli_output (vm, "%-" SESSION_CLI_ID_LEN "s%-20s%-15s%-10s",
1085 "Connection", "App", "API Client", "SegManager");
1087 vlib_cli_output (vm, "%-" SESSION_CLI_ID_LEN "s%-20s", "Connection",
1092 app_wrk = app_worker_get (sm->app_wrk_index);
1093 app_name = application_name_from_index (app_wrk->app_index);
1095 clib_rwlock_reader_lock (&sm->segments_rwlock);
1098 pool_foreach (fs, sm->segments) {
1099 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
1101 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
1104 u32 session_index, thread_index;
1107 session_index = f->shr->master_session_index;
1108 thread_index = f->master_thread_index;
1110 session = session_get (session_index, thread_index);
1111 str = format (0, "%U", format_session, session, verbose);
1114 s = format (s, "%-" SESSION_CLI_ID_LEN "v%-20v%-15u%-10u", str,
1115 app_name, app_wrk->api_client_index,
1116 app_wrk->connects_seg_manager);
1118 s = format (s, "%-" SESSION_CLI_ID_LEN "v%-20v", str, app_name);
1120 vlib_cli_output (vm, "%v", s);
1121 vec_reset_length (s);
1131 clib_rwlock_reader_unlock (&sm->segments_rwlock);
1135 segment_manager_set_watermarks (segment_manager_t * sm,
1136 u8 high_watermark, u8 low_watermark)
1138 ASSERT (high_watermark <= 100 && low_watermark <= 100 &&
1139 low_watermark <= high_watermark);
1141 sm->high_watermark = high_watermark;
1142 sm->low_watermark = low_watermark;
1146 * fd.io coding-style-patch-verification: ON
1149 * eval: (c-set-style "gnu")