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, u8 need_lock)
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
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);
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,
193 0 /* flags */, 0 /* need_lock */);
197 segment_manager_add_segment2 (segment_manager_t *sm, uword segment_size,
200 return segment_manager_add_segment_inline (sm, segment_size, 0, flags,
201 vlib_num_workers ());
205 * Remove segment without lock
208 segment_manager_del_segment (segment_manager_t * sm, fifo_segment_t * fs)
210 if (ssvm_type (&fs->ssvm) != SSVM_SEGMENT_PRIVATE)
212 if (!segment_manager_app_detached (sm))
214 app_worker_t *app_wrk;
216 app_wrk = app_worker_get (sm->app_wrk_index);
217 segment_handle = segment_manager_segment_handle (sm, fs);
218 app_worker_del_segment_notify (app_wrk, segment_handle);
222 fifo_segment_cleanup (fs);
223 ssvm_delete (&fs->ssvm);
226 clib_memset (fs, 0xfb, sizeof (*fs));
227 pool_put (sm->segments, fs);
230 static fifo_segment_t *
231 segment_manager_get_segment_if_valid (segment_manager_t * sm,
234 if (pool_is_free_index (sm->segments, segment_index))
236 return pool_elt_at_index (sm->segments, segment_index);
240 * Removes segment after acquiring writer lock
243 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 if (check_if_empty && fifo_segment_has_fifos (fs))
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, 0 /* check_if_empty */);
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_alloc (void)
341 segment_manager_main_t *smm = &sm_main;
342 segment_manager_t *sm;
344 pool_get_zero (smm->segment_managers, sm);
345 clib_rwlock_init (&sm->segments_rwlock);
350 segment_manager_init (segment_manager_t * sm)
352 segment_manager_props_t *props;
354 props = segment_manager_properties_get (sm);
356 sm->max_fifo_size = props->max_fifo_size ?
357 props->max_fifo_size : sm_main.default_max_fifo_size;
358 sm->max_fifo_size = clib_max (sm->max_fifo_size, 4096);
360 segment_manager_set_watermarks (sm,
361 props->high_watermark,
362 props->low_watermark);
367 * Initializes segment manager based on options provided.
368 * Returns error if ssvm segment(s) allocation fails.
371 segment_manager_init_first (segment_manager_t * sm)
373 segment_manager_props_t *props;
374 uword first_seg_size;
378 segment_manager_init (sm);
379 props = segment_manager_properties_get (sm);
380 first_seg_size = clib_max (props->segment_size,
381 sm_main.default_segment_size);
383 if (props->prealloc_fifos)
385 u64 approx_total_size, max_seg_size = ((u64) 1 << 32) - (128 << 10);
386 u32 rx_rounded_data_size, tx_rounded_data_size;
387 u32 prealloc_fifo_pairs = props->prealloc_fifos;
388 u32 rx_fifo_size, tx_fifo_size, pair_size;
389 u32 approx_segment_count;
391 /* Figure out how many segments should be preallocated */
392 rx_rounded_data_size = (1 << (max_log2 (props->rx_fifo_size)));
393 tx_rounded_data_size = (1 << (max_log2 (props->tx_fifo_size)));
395 rx_fifo_size = sizeof (svm_fifo_t) + rx_rounded_data_size;
396 tx_fifo_size = sizeof (svm_fifo_t) + tx_rounded_data_size;
397 pair_size = rx_fifo_size + tx_fifo_size;
399 approx_total_size = (u64) prealloc_fifo_pairs *pair_size;
400 if (first_seg_size > approx_total_size)
401 max_seg_size = first_seg_size;
402 approx_segment_count = (approx_total_size + (max_seg_size - 1))
405 /* Allocate the segments */
406 for (i = 0; i < approx_segment_count + 1; i++)
408 fs_index = segment_manager_add_segment (sm, max_seg_size, 0);
411 clib_warning ("Failed to preallocate segment %d", i);
415 fs = segment_manager_get_segment (sm, fs_index);
417 sm->event_queue = segment_manager_alloc_queue (fs, props);
419 fifo_segment_preallocate_fifo_pairs (fs,
422 &prealloc_fifo_pairs);
423 fifo_segment_flags (fs) = FIFO_SEGMENT_F_IS_PREALLOCATED;
424 if (prealloc_fifo_pairs == 0)
430 fs_index = segment_manager_add_segment (sm, first_seg_size, 0);
433 clib_warning ("Failed to allocate segment");
437 fs = segment_manager_get_segment (sm, fs_index);
438 sm->event_queue = segment_manager_alloc_queue (fs, props);
440 if (props->prealloc_fifo_hdrs)
444 /* Do not preallocate on slice associated to main thread */
445 i = (vlib_num_workers ()? 1 : 0);
446 hdrs_per_slice = props->prealloc_fifo_hdrs / (fs->n_slices - i);
448 for (; i < fs->n_slices; i++)
450 if (fifo_segment_prealloc_fifo_hdrs (fs, i, hdrs_per_slice))
451 return VNET_API_ERROR_SVM_SEGMENT_CREATE_FAIL;
459 segment_manager_cleanup_detached_listener (segment_manager_t * sm)
461 app_worker_t *app_wrk;
463 app_wrk = app_worker_get_if_valid (sm->app_wrk_index);
467 app_worker_del_detached_sm (app_wrk, segment_manager_index (sm));
471 * Cleanup segment manager.
474 segment_manager_free (segment_manager_t * sm)
476 segment_manager_main_t *smm = &sm_main;
477 fifo_segment_t *fifo_segment;
479 ASSERT (vlib_get_thread_index () == 0
480 && !segment_manager_has_fifos (sm)
481 && segment_manager_app_detached (sm));
483 if (sm->flags & SEG_MANAGER_F_DETACHED_LISTENER)
484 segment_manager_cleanup_detached_listener (sm);
486 /* If we have empty preallocated segments that haven't been removed, remove
487 * them now. Apart from that, the first segment in the first segment manager
488 * is not removed when all fifos are removed. It can only be removed when
489 * the manager is explicitly deleted/detached by the app. */
490 clib_rwlock_writer_lock (&sm->segments_rwlock);
493 pool_foreach (fifo_segment, sm->segments) {
494 segment_manager_del_segment (sm, fifo_segment);
498 pool_free (sm->segments);
499 clib_rwlock_writer_unlock (&sm->segments_rwlock);
501 clib_rwlock_free (&sm->segments_rwlock);
503 clib_memset (sm, 0xfe, sizeof (*sm));
504 pool_put (smm->segment_managers, sm);
508 sm_free_w_index_helper (void *arg)
510 u32 sm_index = *(u32 *) arg;
511 segment_manager_t *sm;
513 ASSERT (vlib_get_thread_index () == 0);
515 if ((sm = segment_manager_get_if_valid (sm_index)))
516 segment_manager_free (sm);
520 segment_manager_free_safe (segment_manager_t *sm)
522 if (!vlib_thread_is_main_w_barrier ())
524 u32 sm_index = segment_manager_index (sm);
525 vlib_rpc_call_main_thread (sm_free_w_index_helper, (u8 *) & sm_index,
530 segment_manager_free (sm);
535 segment_manager_init_free (segment_manager_t * sm)
537 ASSERT (vlib_get_thread_index () == 0);
539 segment_manager_app_detach (sm);
540 if (segment_manager_has_fifos (sm))
541 segment_manager_del_sessions (sm);
544 ASSERT (!sm->first_is_protected || segment_manager_app_detached (sm));
545 segment_manager_free (sm);
550 segment_manager_get (u32 index)
552 return pool_elt_at_index (sm_main.segment_managers, index);
556 segment_manager_get_if_valid (u32 index)
558 if (pool_is_free_index (sm_main.segment_managers, index))
560 return pool_elt_at_index (sm_main.segment_managers, index);
564 segment_manager_index (segment_manager_t * sm)
566 return sm - sm_main.segment_managers;
570 segment_manager_has_fifos (segment_manager_t * sm)
576 segment_manager_foreach_segment_w_lock (seg, sm, ({
577 if (CLIB_DEBUG && !first && !fifo_segment_has_fifos (seg)
578 && !(fifo_segment_flags (seg) & FIFO_SEGMENT_F_IS_PREALLOCATED))
580 clib_warning ("segment %d has no fifos!",
581 segment_manager_segment_index (sm, seg));
584 if (fifo_segment_has_fifos (seg))
586 segment_manager_segment_reader_unlock (sm);
596 * Initiate disconnects for all sessions 'owned' by a segment manager
599 segment_manager_del_sessions (segment_manager_t * sm)
601 session_handle_t *handles = 0, *handle;
607 ASSERT (pool_elts (sm->segments) != 0);
609 /* Across all fifo segments used by the server */
611 segment_manager_foreach_segment_w_lock (fs, sm, ({
612 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
614 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
617 * Remove any residual sessions from the session lookup table
618 * Don't bother deleting the individual fifos, we're going to
619 * throw away the fifo segment in a minute.
623 session = session_get_if_valid (f->shr->master_session_index,
624 f->master_thread_index);
626 vec_add1 (handles, session_handle (session));
631 /* Instead of removing the segment, test when cleaning up disconnected
632 * sessions if the segment can be removed.
637 vec_foreach (handle, handles)
639 session = session_get_from_handle (*handle);
640 session_close (session);
641 /* Avoid propagating notifications back to the app */
642 session->app_wrk_index = APP_INVALID_INDEX;
648 * Initiate disconnects for sessions in specified state 'owned' by a segment
652 segment_manager_del_sessions_filter (segment_manager_t *sm,
653 session_state_t *states)
655 session_handle_t *handles = 0, *handle;
661 ASSERT (pool_elts (sm->segments) != 0);
663 /* Across all fifo segments used by the server */
664 segment_manager_foreach_segment_w_lock (
666 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
668 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
671 session = session_get_if_valid (f->shr->master_session_index,
672 f->master_thread_index);
675 session_state_t *state;
676 vec_foreach (state, states)
678 if (session->session_state == *state)
680 vec_add1 (handles, session_handle (session));
690 vec_foreach (handle, handles)
692 session = session_get_from_handle (*handle);
693 session_close (session);
694 /* Avoid propagating notifications back to the app */
695 session->app_wrk_index = APP_INVALID_INDEX;
701 segment_manager_try_alloc_fifos (fifo_segment_t * fifo_segment,
703 u32 rx_fifo_size, u32 tx_fifo_size,
704 svm_fifo_t ** rx_fifo, svm_fifo_t ** tx_fifo)
706 rx_fifo_size = clib_max (rx_fifo_size, sm_main.default_fifo_size);
707 *rx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
709 FIFO_SEGMENT_RX_FIFO);
711 tx_fifo_size = clib_max (tx_fifo_size, sm_main.default_fifo_size);
712 *tx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
714 FIFO_SEGMENT_TX_FIFO);
718 /* This would be very odd, but handle it... */
721 fifo_segment_free_fifo (fifo_segment, *tx_fifo);
730 fifo_segment_free_fifo (fifo_segment, *rx_fifo);
740 sm_lookup_segment_and_alloc_fifos (segment_manager_t *sm,
741 segment_manager_props_t *props,
742 u32 thread_index, svm_fifo_t **rx_fifo,
743 svm_fifo_t **tx_fifo)
745 uword free_bytes, max_free_bytes;
746 fifo_segment_t *cur, *fs = 0;
750 max_free_bytes = props->rx_fifo_size + props->tx_fifo_size - 1;
752 pool_foreach (cur, sm->segments)
754 if (fifo_segment_flags (cur) & FIFO_SEGMENT_F_CUSTOM_USE)
756 free_bytes = fifo_segment_available_bytes (cur);
757 if (free_bytes > max_free_bytes)
759 max_free_bytes = free_bytes;
764 if (PREDICT_FALSE (!fs))
765 return SESSION_E_SEG_NO_SPACE;
767 fs_index = segment_manager_segment_index (sm, fs);
768 rv = segment_manager_try_alloc_fifos (fs, thread_index, props->rx_fifo_size,
769 props->tx_fifo_size, rx_fifo, tx_fifo);
771 return rv ? SESSION_E_SEG_NO_SPACE : fs_index;
775 sm_lock_and_alloc_segment_and_fifos (segment_manager_t *sm,
776 segment_manager_props_t *props,
777 u32 thread_index, svm_fifo_t **rx_fifo,
778 svm_fifo_t **tx_fifo)
780 int new_fs_index, rv;
783 if (!props->add_segment)
784 return SESSION_E_SEG_NO_SPACE;
786 clib_rwlock_writer_lock (&sm->segments_rwlock);
788 /* Make sure there really is no free space. Another worker might've freed
789 * some fifos or allocated a segment */
790 rv = sm_lookup_segment_and_alloc_fifos (sm, props, thread_index, rx_fifo,
796 segment_manager_add_segment (sm, 0 /* segment_size*/, 1 /* notify_app */);
797 if (new_fs_index < 0)
799 rv = SESSION_E_SEG_CREATE;
802 fs = segment_manager_get_segment (sm, new_fs_index);
803 rv = segment_manager_try_alloc_fifos (fs, thread_index, props->rx_fifo_size,
804 props->tx_fifo_size, rx_fifo, tx_fifo);
807 clib_warning ("Added a segment, still can't allocate a fifo");
808 rv = SESSION_E_SEG_NO_SPACE2;
816 clib_rwlock_writer_unlock (&sm->segments_rwlock);
822 segment_manager_alloc_session_fifos (segment_manager_t * sm,
824 svm_fifo_t ** rx_fifo,
825 svm_fifo_t ** tx_fifo)
827 segment_manager_props_t *props;
831 props = segment_manager_properties_get (sm);
832 sm_index = segment_manager_index (sm);
835 * Fast path: find the first segment with enough free space and
836 * try to allocate the fifos. Done with reader lock
839 segment_manager_segment_reader_lock (sm);
841 fs_index = sm_lookup_segment_and_alloc_fifos (sm, props, thread_index,
844 segment_manager_segment_reader_unlock (sm);
847 * Slow path: if no fifo segment or alloc fail grab writer lock and try
848 * to allocate new segment
850 if (PREDICT_FALSE (fs_index < 0))
852 fs_index = sm_lock_and_alloc_segment_and_fifos (sm, props, thread_index,
858 (*tx_fifo)->segment_manager = sm_index;
859 (*rx_fifo)->segment_manager = sm_index;
860 (*tx_fifo)->segment_index = fs_index;
861 (*rx_fifo)->segment_index = fs_index;
867 segment_manager_dealloc_fifos (svm_fifo_t * rx_fifo, svm_fifo_t * tx_fifo)
869 segment_manager_t *sm;
874 if (!rx_fifo || !tx_fifo)
877 /* It's possible to have no segment manager if the session was removed
878 * as result of a detach. */
879 if (!(sm = segment_manager_get_if_valid (rx_fifo->segment_manager)))
882 segment_index = rx_fifo->segment_index;
883 fs = segment_manager_get_segment_w_lock (sm, segment_index);
884 fifo_segment_free_fifo (fs, rx_fifo);
885 fifo_segment_free_fifo (fs, tx_fifo);
888 * Try to remove fifo segment if it has no fifos. This can be done only if
889 * the segment is not the first in the segment manager or if it is first
890 * and it is not protected. Moreover, if the segment is first and the app
891 * has detached from the segment manager, remove the segment manager.
893 if (!fifo_segment_has_fifos (fs))
895 /* If first, remove only if not protected */
896 try_delete = segment_index != 0 || !sm->first_is_protected;
899 segment_manager_segment_reader_unlock (sm);
901 if (PREDICT_FALSE (try_delete))
903 /* Only remove if empty after writer lock acquired */
904 sm_lock_and_del_segment_inline (sm, segment_index,
905 1 /* check_if_empty */);
907 /* Remove segment manager if no sessions and detached from app */
908 if (segment_manager_app_detached (sm)
909 && !segment_manager_has_fifos (sm))
910 segment_manager_free_safe (sm);
915 segment_manager_detach_fifo (segment_manager_t *sm, svm_fifo_t **f)
919 fs = segment_manager_get_segment_w_lock (sm, (*f)->segment_index);
920 fifo_segment_detach_fifo (fs, f);
921 segment_manager_segment_reader_unlock (sm);
925 segment_manager_attach_fifo (segment_manager_t *sm, svm_fifo_t **f,
930 fs = segment_manager_get_segment_w_lock (sm, (*f)->segment_index);
931 fifo_segment_attach_fifo (fs, f, s->thread_index);
932 segment_manager_segment_reader_unlock (sm);
934 (*f)->shr->master_session_index = s->session_index;
935 (*f)->master_thread_index = s->thread_index;
939 segment_manager_evt_q_expected_size (u32 q_len)
941 u32 fifo_evt_size, notif_q_size, q_hdrs;
942 u32 msg_q_sz, fifo_evt_ring_sz, session_ntf_ring_sz;
944 fifo_evt_size = 1 << max_log2 (sizeof (session_event_t));
945 notif_q_size = clib_max (16, q_len >> 4);
947 msg_q_sz = q_len * sizeof (svm_msg_q_msg_t);
948 fifo_evt_ring_sz = q_len * fifo_evt_size;
949 session_ntf_ring_sz = notif_q_size * 256;
950 q_hdrs = sizeof (svm_queue_t) + sizeof (svm_msg_q_t);
952 return (msg_q_sz + fifo_evt_ring_sz + session_ntf_ring_sz + q_hdrs);
956 * Allocates shm queue in the first segment
958 * Must be called with lock held
961 segment_manager_alloc_queue (fifo_segment_t * segment,
962 segment_manager_props_t * props)
964 u32 fifo_evt_size, session_evt_size = 256, notif_q_size;
965 svm_msg_q_cfg_t _cfg, *cfg = &_cfg;
968 fifo_evt_size = sizeof (session_event_t);
969 notif_q_size = clib_max (16, props->evt_q_size >> 4);
971 svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = {
972 {props->evt_q_size, fifo_evt_size, 0},
973 {notif_q_size, session_evt_size, 0}
976 cfg->consumer_pid = 0;
978 cfg->q_nitems = props->evt_q_size;
981 q = fifo_segment_msg_q_alloc (segment, 0, cfg);
983 if (props->use_mq_eventfd)
985 if (svm_msg_q_alloc_eventfd (q))
986 clib_warning ("failed to alloc eventfd");
992 segment_manager_event_queue (segment_manager_t * sm)
994 return sm->event_queue;
998 * Frees shm queue allocated in the first segment
1001 segment_manager_dealloc_queue (segment_manager_t * sm, svm_queue_t * q)
1003 fifo_segment_t *segment;
1004 ssvm_shared_header_t *sh;
1007 ASSERT (!pool_is_free_index (sm->segments, 0));
1009 segment = segment_manager_get_segment_w_lock (sm, 0);
1010 sh = segment->ssvm.sh;
1012 oldheap = ssvm_push_heap (sh);
1014 ssvm_pop_heap (oldheap);
1015 segment_manager_segment_reader_unlock (sm);
1019 * Init segment vm address allocator
1022 segment_manager_main_init (void)
1024 segment_manager_main_t *sm = &sm_main;
1026 sm->default_fifo_size = 1 << 12;
1027 sm->default_segment_size = 1 << 20;
1028 sm->default_app_mq_size = 128;
1029 sm->default_max_fifo_size = 4 << 20;
1030 sm->default_high_watermark = 80;
1031 sm->default_low_watermark = 50;
1035 format_segment_manager (u8 *s, va_list *args)
1037 segment_manager_t *sm = va_arg (*args, segment_manager_t *);
1038 int verbose = va_arg (*args, int);
1039 app_worker_t *app_wrk;
1040 uword max_fifo_size;
1041 fifo_segment_t *seg;
1045 app_wrk = app_worker_get_if_valid (sm->app_wrk_index);
1046 app = app_wrk ? application_get (app_wrk->app_index) : 0;
1047 custom_logic = (app && (app->cb_fns.fifo_tuning_callback)) ? 1 : 0;
1048 max_fifo_size = sm->max_fifo_size;
1051 "[%u] %v app-wrk: %u segs: %u max-fifo-sz: %U "
1052 "wmarks: %u %u %s flags: 0x%x",
1053 segment_manager_index (sm), app->name, sm->app_wrk_index,
1054 pool_elts (sm->segments), format_memory_size, max_fifo_size,
1055 sm->high_watermark, sm->low_watermark,
1056 custom_logic ? "custom-tuning" : "no-tuning", sm->flags);
1058 if (!verbose || !pool_elts (sm->segments))
1061 s = format (s, "\n\n");
1063 segment_manager_foreach_segment_w_lock (
1064 seg, sm, ({ s = format (s, " *%U", format_fifo_segment, seg, verbose); }));
1069 static clib_error_t *
1070 segment_manager_show_fn (vlib_main_t * vm, unformat_input_t * input,
1071 vlib_cli_command_t * cmd)
1073 unformat_input_t _line_input, *line_input = &_line_input;
1074 segment_manager_main_t *smm = &sm_main;
1075 u8 show_segments = 0, verbose = 0;
1076 segment_manager_t *sm;
1079 if (!unformat_user (input, unformat_line_input, line_input))
1081 vlib_cli_output (vm, "%d segment managers allocated",
1082 pool_elts (smm->segment_managers));
1086 while (unformat_check_input (line_input) != UNFORMAT_END_OF_INPUT)
1088 if (unformat (line_input, "segments"))
1090 else if (unformat (line_input, "verbose"))
1092 else if (unformat (line_input, "index %u", &sm_index))
1096 vlib_cli_output (vm, "unknown input [%U]", format_unformat_error,
1102 if (!pool_elts (smm->segment_managers))
1107 sm = segment_manager_get_if_valid (sm_index);
1110 vlib_cli_output (vm, "segment manager %u not allocated", sm_index);
1113 vlib_cli_output (vm, "%U", format_segment_manager, sm, 1 /* verbose */);
1117 if (verbose || show_segments)
1119 pool_foreach (sm, smm->segment_managers) {
1120 vlib_cli_output (vm, "%U", format_segment_manager, sm,
1124 vlib_cli_output (vm, "\n");
1129 unformat_free (line_input);
1135 VLIB_CLI_COMMAND (segment_manager_show_command, static) = {
1136 .path = "show segment-manager",
1137 .short_help = "show segment-manager [segments][verbose][index <nn>]",
1138 .function = segment_manager_show_fn,
1143 segment_manager_format_sessions (segment_manager_t * sm, int verbose)
1145 vlib_main_t *vm = vlib_get_main ();
1146 app_worker_t *app_wrk;
1156 vlib_cli_output (vm, "%-" SESSION_CLI_ID_LEN "s%-20s%-15s%-10s",
1157 "Connection", "App", "API Client", "SegManager");
1159 vlib_cli_output (vm, "%-" SESSION_CLI_ID_LEN "s%-20s", "Connection",
1164 app_wrk = app_worker_get (sm->app_wrk_index);
1165 app_name = application_name_from_index (app_wrk->app_index);
1167 clib_rwlock_reader_lock (&sm->segments_rwlock);
1170 pool_foreach (fs, sm->segments) {
1171 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
1173 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
1176 u32 session_index, thread_index;
1179 session_index = f->shr->master_session_index;
1180 thread_index = f->master_thread_index;
1182 session = session_get (session_index, thread_index);
1183 str = format (0, "%U", format_session, session, verbose);
1186 s = format (s, "%-" SESSION_CLI_ID_LEN "v%-20v%-15u%-10u", str,
1187 app_name, app_wrk->api_client_index,
1188 app_wrk->connects_seg_manager);
1190 s = format (s, "%-" SESSION_CLI_ID_LEN "v%-20v", str, app_name);
1192 vlib_cli_output (vm, "%v", s);
1193 vec_reset_length (s);
1203 clib_rwlock_reader_unlock (&sm->segments_rwlock);
1207 segment_manager_set_watermarks (segment_manager_t * sm,
1208 u8 high_watermark, u8 low_watermark)
1210 ASSERT (high_watermark <= 100 && low_watermark <= 100 &&
1211 low_watermark <= high_watermark);
1213 sm->high_watermark = high_watermark;
1214 sm->low_watermark = low_watermark;
1218 * fd.io coding-style-patch-verification: ON
1221 * eval: (c-set-style "gnu")