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);
185 if (vlib_num_workers ())
186 clib_rwlock_writer_unlock (&sm->segments_rwlock);
192 segment_manager_add_segment (segment_manager_t *sm, uword segment_size,
195 return segment_manager_add_segment_inline (sm, segment_size, notify_app, 0);
199 segment_manager_add_segment2 (segment_manager_t *sm, uword segment_size,
202 return segment_manager_add_segment_inline (sm, segment_size, 0, flags);
206 * Remove segment without lock
209 segment_manager_del_segment (segment_manager_t * sm, fifo_segment_t * fs)
211 if (ssvm_type (&fs->ssvm) != SSVM_SEGMENT_PRIVATE)
213 if (!segment_manager_app_detached (sm))
215 app_worker_t *app_wrk;
217 app_wrk = app_worker_get (sm->app_wrk_index);
218 segment_handle = segment_manager_segment_handle (sm, fs);
219 app_worker_del_segment_notify (app_wrk, segment_handle);
223 fifo_segment_cleanup (fs);
224 ssvm_delete (&fs->ssvm);
227 clib_memset (fs, 0xfb, sizeof (*fs));
228 pool_put (sm->segments, fs);
231 static fifo_segment_t *
232 segment_manager_get_segment_if_valid (segment_manager_t * sm,
235 if (pool_is_free_index (sm->segments, segment_index))
237 return pool_elt_at_index (sm->segments, segment_index);
241 * Removes segment after acquiring writer lock
244 sm_lock_and_del_segment_inline (segment_manager_t * sm, u32 fs_index)
249 clib_rwlock_writer_lock (&sm->segments_rwlock);
251 fs = segment_manager_get_segment_if_valid (sm, fs_index);
255 is_prealloc = fifo_segment_flags (fs) & FIFO_SEGMENT_F_IS_PREALLOCATED;
256 if (is_prealloc && !segment_manager_app_detached (sm))
259 segment_manager_del_segment (sm, fs);
262 clib_rwlock_writer_unlock (&sm->segments_rwlock);
266 segment_manager_lock_and_del_segment (segment_manager_t * sm, u32 fs_index)
268 sm_lock_and_del_segment_inline (sm, fs_index);
272 * Reads a segment from the segment manager's pool without lock
275 segment_manager_get_segment (segment_manager_t * sm, u32 segment_index)
277 return pool_elt_at_index (sm->segments, segment_index);
281 segment_manager_segment_handle (segment_manager_t * sm,
282 fifo_segment_t * segment)
284 u32 segment_index = segment_manager_segment_index (sm, segment);
285 return (((u64) segment_manager_index (sm) << 32) | segment_index);
289 segment_manager_make_segment_handle (u32 segment_manager_index,
292 return (((u64) segment_manager_index << 32) | segment_index);
296 segment_manager_get_segment_w_handle (u64 segment_handle)
298 u32 sm_index, segment_index;
299 segment_manager_t *sm;
301 segment_manager_parse_segment_handle (segment_handle, &sm_index,
303 sm = segment_manager_get (sm_index);
304 if (!sm || pool_is_free_index (sm->segments, segment_index))
306 return pool_elt_at_index (sm->segments, segment_index);
310 * Reads a segment from the segment manager's pool and acquires reader lock
312 * Caller must drop the reader's lock by calling
313 * @ref segment_manager_segment_reader_unlock once it finishes working with
317 segment_manager_get_segment_w_lock (segment_manager_t * sm, u32 segment_index)
319 clib_rwlock_reader_lock (&sm->segments_rwlock);
320 return pool_elt_at_index (sm->segments, segment_index);
324 segment_manager_segment_reader_lock (segment_manager_t * sm)
326 clib_rwlock_reader_lock (&sm->segments_rwlock);
330 segment_manager_segment_reader_unlock (segment_manager_t * sm)
332 clib_rwlock_reader_unlock (&sm->segments_rwlock);
336 segment_manager_segment_writer_unlock (segment_manager_t * sm)
338 clib_rwlock_writer_unlock (&sm->segments_rwlock);
342 segment_manager_alloc (void)
344 segment_manager_main_t *smm = &sm_main;
345 segment_manager_t *sm;
347 pool_get_zero (smm->segment_managers, sm);
348 clib_rwlock_init (&sm->segments_rwlock);
353 segment_manager_init (segment_manager_t * sm)
355 segment_manager_props_t *props;
357 props = segment_manager_properties_get (sm);
359 sm->max_fifo_size = props->max_fifo_size ?
360 props->max_fifo_size : sm_main.default_max_fifo_size;
361 sm->max_fifo_size = clib_max (sm->max_fifo_size, 4096);
363 segment_manager_set_watermarks (sm,
364 props->high_watermark,
365 props->low_watermark);
370 * Initializes segment manager based on options provided.
371 * Returns error if ssvm segment(s) allocation fails.
374 segment_manager_init_first (segment_manager_t * sm)
376 segment_manager_props_t *props;
377 uword first_seg_size;
381 segment_manager_init (sm);
382 props = segment_manager_properties_get (sm);
383 first_seg_size = clib_max (props->segment_size,
384 sm_main.default_segment_size);
386 if (props->prealloc_fifos)
388 u64 approx_total_size, max_seg_size = ((u64) 1 << 32) - (128 << 10);
389 u32 rx_rounded_data_size, tx_rounded_data_size;
390 u32 prealloc_fifo_pairs = props->prealloc_fifos;
391 u32 rx_fifo_size, tx_fifo_size, pair_size;
392 u32 approx_segment_count;
394 /* Figure out how many segments should be preallocated */
395 rx_rounded_data_size = (1 << (max_log2 (props->rx_fifo_size)));
396 tx_rounded_data_size = (1 << (max_log2 (props->tx_fifo_size)));
398 rx_fifo_size = sizeof (svm_fifo_t) + rx_rounded_data_size;
399 tx_fifo_size = sizeof (svm_fifo_t) + tx_rounded_data_size;
400 pair_size = rx_fifo_size + tx_fifo_size;
402 approx_total_size = (u64) prealloc_fifo_pairs *pair_size;
403 if (first_seg_size > approx_total_size)
404 max_seg_size = first_seg_size;
405 approx_segment_count = (approx_total_size + (max_seg_size - 1))
408 /* Allocate the segments */
409 for (i = 0; i < approx_segment_count + 1; i++)
411 fs_index = segment_manager_add_segment (sm, max_seg_size, 0);
414 clib_warning ("Failed to preallocate segment %d", i);
418 fs = segment_manager_get_segment (sm, fs_index);
420 sm->event_queue = segment_manager_alloc_queue (fs, props);
422 fifo_segment_preallocate_fifo_pairs (fs,
425 &prealloc_fifo_pairs);
426 fifo_segment_flags (fs) = FIFO_SEGMENT_F_IS_PREALLOCATED;
427 if (prealloc_fifo_pairs == 0)
433 fs_index = segment_manager_add_segment (sm, first_seg_size, 0);
436 clib_warning ("Failed to allocate segment");
440 fs = segment_manager_get_segment (sm, fs_index);
441 sm->event_queue = segment_manager_alloc_queue (fs, props);
443 if (props->prealloc_fifo_hdrs)
447 /* Do not preallocate on slice associated to main thread */
448 i = (vlib_num_workers ()? 1 : 0);
449 hdrs_per_slice = props->prealloc_fifo_hdrs / (fs->n_slices - i);
451 for (; i < fs->n_slices; i++)
453 if (fifo_segment_prealloc_fifo_hdrs (fs, i, hdrs_per_slice))
454 return VNET_API_ERROR_SVM_SEGMENT_CREATE_FAIL;
462 segment_manager_cleanup_detached_listener (segment_manager_t * sm)
464 app_worker_t *app_wrk;
466 app_wrk = app_worker_get_if_valid (sm->app_wrk_index);
470 app_worker_del_detached_sm (app_wrk, segment_manager_index (sm));
474 * Cleanup segment manager.
477 segment_manager_free (segment_manager_t * sm)
479 segment_manager_main_t *smm = &sm_main;
480 fifo_segment_t *fifo_segment;
482 ASSERT (vlib_get_thread_index () == 0
483 && !segment_manager_has_fifos (sm)
484 && segment_manager_app_detached (sm));
486 if (sm->flags & SEG_MANAGER_F_DETACHED_LISTENER)
487 segment_manager_cleanup_detached_listener (sm);
489 /* If we have empty preallocated segments that haven't been removed, remove
490 * them now. Apart from that, the first segment in the first segment manager
491 * is not removed when all fifos are removed. It can only be removed when
492 * the manager is explicitly deleted/detached by the app. */
493 clib_rwlock_writer_lock (&sm->segments_rwlock);
496 pool_foreach (fifo_segment, sm->segments) {
497 segment_manager_del_segment (sm, fifo_segment);
501 pool_free (sm->segments);
502 clib_rwlock_writer_unlock (&sm->segments_rwlock);
504 clib_rwlock_free (&sm->segments_rwlock);
506 clib_memset (sm, 0xfe, sizeof (*sm));
507 pool_put (smm->segment_managers, sm);
511 sm_free_w_index_helper (void *arg)
513 u32 sm_index = *(u32 *) arg;
514 segment_manager_t *sm;
516 ASSERT (vlib_get_thread_index () == 0);
518 if ((sm = segment_manager_get_if_valid (sm_index)))
519 segment_manager_free (sm);
523 segment_manager_free_safe (segment_manager_t *sm)
525 if (!vlib_thread_is_main_w_barrier ())
527 u32 sm_index = segment_manager_index (sm);
528 vlib_rpc_call_main_thread (sm_free_w_index_helper, (u8 *) & sm_index,
533 segment_manager_free (sm);
538 segment_manager_init_free (segment_manager_t * sm)
540 ASSERT (vlib_get_thread_index () == 0);
542 segment_manager_app_detach (sm);
543 if (segment_manager_has_fifos (sm))
544 segment_manager_del_sessions (sm);
547 ASSERT (!sm->first_is_protected || segment_manager_app_detached (sm));
548 segment_manager_free (sm);
553 segment_manager_get (u32 index)
555 return pool_elt_at_index (sm_main.segment_managers, index);
559 segment_manager_get_if_valid (u32 index)
561 if (pool_is_free_index (sm_main.segment_managers, index))
563 return pool_elt_at_index (sm_main.segment_managers, index);
567 segment_manager_index (segment_manager_t * sm)
569 return sm - sm_main.segment_managers;
573 segment_manager_has_fifos (segment_manager_t * sm)
579 segment_manager_foreach_segment_w_lock (seg, sm, ({
580 if (CLIB_DEBUG && !first && !fifo_segment_has_fifos (seg)
581 && !(fifo_segment_flags (seg) & FIFO_SEGMENT_F_IS_PREALLOCATED))
583 clib_warning ("segment %d has no fifos!",
584 segment_manager_segment_index (sm, seg));
587 if (fifo_segment_has_fifos (seg))
589 segment_manager_segment_reader_unlock (sm);
599 * Initiate disconnects for all sessions 'owned' by a segment manager
602 segment_manager_del_sessions (segment_manager_t * sm)
604 session_handle_t *handles = 0, *handle;
610 ASSERT (pool_elts (sm->segments) != 0);
612 /* Across all fifo segments used by the server */
614 segment_manager_foreach_segment_w_lock (fs, sm, ({
615 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
617 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
620 * Remove any residual sessions from the session lookup table
621 * Don't bother deleting the individual fifos, we're going to
622 * throw away the fifo segment in a minute.
626 session = session_get_if_valid (f->shr->master_session_index,
627 f->master_thread_index);
629 vec_add1 (handles, session_handle (session));
634 /* Instead of removing the segment, test when cleaning up disconnected
635 * sessions if the segment can be removed.
640 vec_foreach (handle, handles)
642 session = session_get_from_handle (*handle);
643 session_close (session);
644 /* Avoid propagating notifications back to the app */
645 session->app_wrk_index = APP_INVALID_INDEX;
651 * Initiate disconnects for sessions in specified state 'owned' by a segment
655 segment_manager_del_sessions_filter (segment_manager_t *sm,
656 session_state_t *states)
658 session_handle_t *handles = 0, *handle;
664 ASSERT (pool_elts (sm->segments) != 0);
666 /* Across all fifo segments used by the server */
667 segment_manager_foreach_segment_w_lock (
669 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
671 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
674 session = session_get_if_valid (f->shr->master_session_index,
675 f->master_thread_index);
678 session_state_t *state;
679 vec_foreach (state, states)
681 if (session->session_state == *state)
683 vec_add1 (handles, session_handle (session));
693 vec_foreach (handle, handles)
695 session = session_get_from_handle (*handle);
696 session_close (session);
697 /* Avoid propagating notifications back to the app */
698 session->app_wrk_index = APP_INVALID_INDEX;
704 segment_manager_try_alloc_fifos (fifo_segment_t * fifo_segment,
706 u32 rx_fifo_size, u32 tx_fifo_size,
707 svm_fifo_t ** rx_fifo, svm_fifo_t ** tx_fifo)
709 rx_fifo_size = clib_max (rx_fifo_size, sm_main.default_fifo_size);
710 *rx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
712 FIFO_SEGMENT_RX_FIFO);
714 tx_fifo_size = clib_max (tx_fifo_size, sm_main.default_fifo_size);
715 *tx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
717 FIFO_SEGMENT_TX_FIFO);
721 /* This would be very odd, but handle it... */
724 fifo_segment_free_fifo (fifo_segment, *tx_fifo);
733 fifo_segment_free_fifo (fifo_segment, *rx_fifo);
743 segment_manager_alloc_session_fifos (segment_manager_t * sm,
745 svm_fifo_t ** rx_fifo,
746 svm_fifo_t ** tx_fifo)
748 int alloc_fail = 1, rv = 0, new_fs_index;
749 uword free_bytes, max_free_bytes = 0;
750 segment_manager_props_t *props;
751 fifo_segment_t *fs = 0, *cur;
752 u32 sm_index, fs_index;
754 props = segment_manager_properties_get (sm);
757 * Find the first free segment to allocate the fifos in
760 segment_manager_segment_reader_lock (sm);
762 pool_foreach (cur, sm->segments) {
763 if (fifo_segment_flags (cur) & FIFO_SEGMENT_F_CUSTOM_USE)
765 free_bytes = fifo_segment_available_bytes (cur);
766 if (free_bytes > max_free_bytes)
768 max_free_bytes = free_bytes;
775 alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index,
779 /* On success, keep lock until fifos are initialized */
784 segment_manager_segment_reader_unlock (sm);
787 * Allocation failed, see if we can add a new segment
789 if (props->add_segment)
791 if ((new_fs_index = segment_manager_add_segment (sm, 0, 1)) < 0)
793 clib_warning ("Failed to add new segment");
794 return SESSION_E_SEG_CREATE;
796 fs = segment_manager_get_segment_w_lock (sm, new_fs_index);
797 alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index,
803 clib_warning ("Added a segment, still can't allocate a fifo");
804 segment_manager_segment_reader_unlock (sm);
805 return SESSION_E_SEG_NO_SPACE2;
810 SESSION_DBG ("Can't add new seg and no space to allocate fifos!");
811 return SESSION_E_SEG_NO_SPACE;
815 ASSERT (rx_fifo && tx_fifo);
817 sm_index = segment_manager_index (sm);
818 fs_index = segment_manager_segment_index (sm, fs);
819 (*tx_fifo)->segment_manager = sm_index;
820 (*rx_fifo)->segment_manager = sm_index;
821 (*tx_fifo)->segment_index = fs_index;
822 (*rx_fifo)->segment_index = fs_index;
824 /* Drop the lock after app is notified */
825 segment_manager_segment_reader_unlock (sm);
831 segment_manager_dealloc_fifos (svm_fifo_t * rx_fifo, svm_fifo_t * tx_fifo)
833 segment_manager_t *sm;
837 if (!rx_fifo || !tx_fifo)
840 /* It's possible to have no segment manager if the session was removed
841 * as result of a detach. */
842 if (!(sm = segment_manager_get_if_valid (rx_fifo->segment_manager)))
845 segment_index = rx_fifo->segment_index;
846 fs = segment_manager_get_segment_w_lock (sm, segment_index);
847 fifo_segment_free_fifo (fs, rx_fifo);
848 fifo_segment_free_fifo (fs, tx_fifo);
851 * Try to remove svm segment if it has no fifos. This can be done only if
852 * the segment is not the first in the segment manager or if it is first
853 * and it is not protected. Moreover, if the segment is first and the app
854 * has detached from the segment manager, remove the segment manager.
856 if (!fifo_segment_has_fifos (fs))
858 segment_manager_segment_reader_unlock (sm);
860 /* Remove segment if it holds no fifos or first but not protected */
861 if (segment_index != 0 || !sm->first_is_protected)
862 sm_lock_and_del_segment_inline (sm, segment_index);
864 /* Remove segment manager if no sessions and detached from app */
865 if (segment_manager_app_detached (sm)
866 && !segment_manager_has_fifos (sm))
867 segment_manager_free_safe (sm);
870 segment_manager_segment_reader_unlock (sm);
874 segment_manager_detach_fifo (segment_manager_t *sm, svm_fifo_t **f)
878 fs = segment_manager_get_segment_w_lock (sm, (*f)->segment_index);
879 fifo_segment_detach_fifo (fs, f);
880 segment_manager_segment_reader_unlock (sm);
884 segment_manager_attach_fifo (segment_manager_t *sm, svm_fifo_t **f,
889 fs = segment_manager_get_segment_w_lock (sm, (*f)->segment_index);
890 fifo_segment_attach_fifo (fs, f, s->thread_index);
891 segment_manager_segment_reader_unlock (sm);
893 (*f)->shr->master_session_index = s->session_index;
894 (*f)->master_thread_index = s->thread_index;
898 segment_manager_evt_q_expected_size (u32 q_len)
900 u32 fifo_evt_size, notif_q_size, q_hdrs;
901 u32 msg_q_sz, fifo_evt_ring_sz, session_ntf_ring_sz;
903 fifo_evt_size = 1 << max_log2 (sizeof (session_event_t));
904 notif_q_size = clib_max (16, q_len >> 4);
906 msg_q_sz = q_len * sizeof (svm_msg_q_msg_t);
907 fifo_evt_ring_sz = q_len * fifo_evt_size;
908 session_ntf_ring_sz = notif_q_size * 256;
909 q_hdrs = sizeof (svm_queue_t) + sizeof (svm_msg_q_t);
911 return (msg_q_sz + fifo_evt_ring_sz + session_ntf_ring_sz + q_hdrs);
915 * Allocates shm queue in the first segment
917 * Must be called with lock held
920 segment_manager_alloc_queue (fifo_segment_t * segment,
921 segment_manager_props_t * props)
923 u32 fifo_evt_size, session_evt_size = 256, notif_q_size;
924 svm_msg_q_cfg_t _cfg, *cfg = &_cfg;
927 fifo_evt_size = sizeof (session_event_t);
928 notif_q_size = clib_max (16, props->evt_q_size >> 4);
930 svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = {
931 {props->evt_q_size, fifo_evt_size, 0},
932 {notif_q_size, session_evt_size, 0}
935 cfg->consumer_pid = 0;
937 cfg->q_nitems = props->evt_q_size;
940 q = fifo_segment_msg_q_alloc (segment, 0, cfg);
942 if (props->use_mq_eventfd)
944 if (svm_msg_q_alloc_eventfd (q))
945 clib_warning ("failed to alloc eventfd");
951 segment_manager_event_queue (segment_manager_t * sm)
953 return sm->event_queue;
957 * Frees shm queue allocated in the first segment
960 segment_manager_dealloc_queue (segment_manager_t * sm, svm_queue_t * q)
962 fifo_segment_t *segment;
963 ssvm_shared_header_t *sh;
966 ASSERT (!pool_is_free_index (sm->segments, 0));
968 segment = segment_manager_get_segment_w_lock (sm, 0);
969 sh = segment->ssvm.sh;
971 oldheap = ssvm_push_heap (sh);
973 ssvm_pop_heap (oldheap);
974 segment_manager_segment_reader_unlock (sm);
978 * Init segment vm address allocator
981 segment_manager_main_init (void)
983 segment_manager_main_t *sm = &sm_main;
985 sm->default_fifo_size = 1 << 12;
986 sm->default_segment_size = 1 << 20;
987 sm->default_app_mq_size = 128;
988 sm->default_max_fifo_size = 4 << 20;
989 sm->default_high_watermark = 80;
990 sm->default_low_watermark = 50;
993 static clib_error_t *
994 segment_manager_show_fn (vlib_main_t * vm, unformat_input_t * input,
995 vlib_cli_command_t * cmd)
997 segment_manager_main_t *smm = &sm_main;
998 u8 show_segments = 0, verbose = 0;
1000 segment_manager_t *sm;
1001 fifo_segment_t *seg;
1002 app_worker_t *app_wrk;
1006 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
1008 if (unformat (input, "segments"))
1010 else if (unformat (input, "verbose"))
1013 return clib_error_return (0, "unknown input `%U'",
1014 format_unformat_error, input);
1016 vlib_cli_output (vm, "%d segment managers allocated",
1017 pool_elts (smm->segment_managers));
1018 if (verbose && pool_elts (smm->segment_managers))
1020 vlib_cli_output (vm, "%-6s%=10s%=10s%=13s%=11s%=11s%=12s",
1021 "Index", "AppIndex", "Segments", "MaxFifoSize",
1022 "HighWater", "LowWater", "FifoTuning");
1025 pool_foreach (sm, smm->segment_managers) {
1026 app_wrk = app_worker_get_if_valid (sm->app_wrk_index);
1027 app = app_wrk ? application_get (app_wrk->app_index) : 0;
1028 custom_logic = (app && (app->cb_fns.fifo_tuning_callback)) ? 1 : 0;
1029 max_fifo_size = sm->max_fifo_size;
1031 vlib_cli_output (vm, "%-6d%=10d%=10d%=13U%=11d%=11d%=12s",
1032 segment_manager_index (sm),
1033 sm->app_wrk_index, pool_elts (sm->segments),
1034 format_memory_size, max_fifo_size,
1035 sm->high_watermark, sm->low_watermark,
1036 custom_logic ? "custom" : "none");
1040 vlib_cli_output (vm, "\n");
1044 vlib_cli_output (vm, "%U", format_fifo_segment, 0, verbose);
1047 pool_foreach (sm, smm->segment_managers) {
1048 segment_manager_foreach_segment_w_lock (seg, sm, ({
1049 vlib_cli_output (vm, "%U", format_fifo_segment, seg, verbose);
1059 VLIB_CLI_COMMAND (segment_manager_show_command, static) =
1061 .path = "show segment-manager",
1062 .short_help = "show segment-manager [segments][verbose]",
1063 .function = segment_manager_show_fn,
1068 segment_manager_format_sessions (segment_manager_t * sm, int verbose)
1070 vlib_main_t *vm = vlib_get_main ();
1071 app_worker_t *app_wrk;
1081 vlib_cli_output (vm, "%-" SESSION_CLI_ID_LEN "s%-20s%-15s%-10s",
1082 "Connection", "App", "API Client", "SegManager");
1084 vlib_cli_output (vm, "%-" SESSION_CLI_ID_LEN "s%-20s", "Connection",
1089 app_wrk = app_worker_get (sm->app_wrk_index);
1090 app_name = application_name_from_index (app_wrk->app_index);
1092 clib_rwlock_reader_lock (&sm->segments_rwlock);
1095 pool_foreach (fs, sm->segments) {
1096 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
1098 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
1101 u32 session_index, thread_index;
1104 session_index = f->shr->master_session_index;
1105 thread_index = f->master_thread_index;
1107 session = session_get (session_index, thread_index);
1108 str = format (0, "%U", format_session, session, verbose);
1111 s = format (s, "%-" SESSION_CLI_ID_LEN "v%-20v%-15u%-10u", str,
1112 app_name, app_wrk->api_client_index,
1113 app_wrk->connects_seg_manager);
1115 s = format (s, "%-" SESSION_CLI_ID_LEN "v%-20v", str, app_name);
1117 vlib_cli_output (vm, "%v", s);
1118 vec_reset_length (s);
1128 clib_rwlock_reader_unlock (&sm->segments_rwlock);
1132 segment_manager_set_watermarks (segment_manager_t * sm,
1133 u8 high_watermark, u8 low_watermark)
1135 ASSERT (high_watermark <= 100 && low_watermark <= 100 &&
1136 low_watermark <= high_watermark);
1138 sm->high_watermark = high_watermark;
1139 sm->low_watermark = low_watermark;
1143 * fd.io coding-style-patch-verification: ON
1146 * eval: (c-set-style "gnu")