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 clib_valloc_main_t va_allocator; /**< Virtual address allocator */
24 u32 seg_name_counter; /**< Counter for segment names */
29 u32 default_fifo_size; /**< default rx/tx fifo size */
30 u32 default_segment_size; /**< default fifo segment size */
31 u32 default_app_mq_size; /**< default app msg q size */
32 u32 default_max_fifo_size; /**< default max fifo size */
33 u8 default_high_watermark; /**< default high watermark % */
34 u8 default_low_watermark; /**< default low watermark % */
35 } segment_manager_main_t;
37 static segment_manager_main_t sm_main;
39 #define segment_manager_foreach_segment_w_lock(VAR, SM, BODY) \
41 clib_rwlock_reader_lock (&(SM)->segments_rwlock); \
42 pool_foreach((VAR), ((SM)->segments)) (BODY); \
43 clib_rwlock_reader_unlock (&(SM)->segments_rwlock); \
46 static segment_manager_props_t *
47 segment_manager_properties_get (segment_manager_t * sm)
49 app_worker_t *app_wrk = app_worker_get (sm->app_wrk_index);
50 return application_get_segment_manager_properties (app_wrk->app_index);
53 segment_manager_props_t *
54 segment_manager_props_init (segment_manager_props_t * props)
56 props->add_segment_size = sm_main.default_segment_size;
57 props->rx_fifo_size = sm_main.default_fifo_size;
58 props->tx_fifo_size = sm_main.default_fifo_size;
59 props->evt_q_size = sm_main.default_app_mq_size;
60 props->max_fifo_size = sm_main.default_max_fifo_size;
61 props->high_watermark = sm_main.default_high_watermark;
62 props->low_watermark = sm_main.default_low_watermark;
63 props->n_slices = vlib_num_workers () + 1;
68 segment_manager_app_detached (segment_manager_t * sm)
70 return (sm->flags & SEG_MANAGER_F_DETACHED);
74 segment_manager_app_detach (segment_manager_t * sm)
76 sm->flags |= SEG_MANAGER_F_DETACHED;
80 segment_manager_segment_index (segment_manager_t * sm, fifo_segment_t * seg)
82 return (seg - sm->segments);
86 * Adds segment to segment manager's pool
88 * If needed a writer's lock is acquired before allocating a new segment
89 * to avoid affecting any of the segments pool readers.
92 segment_manager_add_segment (segment_manager_t * sm, uword segment_size)
94 uword baseva = (uword) ~ 0ULL, alloc_size, page_size;
95 u32 rnd_margin = 128 << 10, fs_index = ~0;
96 segment_manager_main_t *smm = &sm_main;
97 segment_manager_props_t *props;
102 props = segment_manager_properties_get (sm);
104 /* Not configured for addition of new segments and not first */
105 if (!props->add_segment && !segment_size)
107 clib_warning ("cannot allocate new segment");
108 return VNET_API_ERROR_INVALID_VALUE;
112 * Allocate fifo segment and grab lock if needed
114 if (vlib_num_workers ())
115 clib_rwlock_writer_lock (&sm->segments_rwlock);
117 pool_get_zero (sm->segments, fs);
120 * Allocate ssvm segment
122 segment_size = segment_size ? segment_size : props->add_segment_size;
123 page_size = clib_mem_get_page_size ();
124 /* Protect against segment size u32 wrap */
125 segment_size = clib_max (segment_size + page_size - 1, segment_size);
126 segment_size = segment_size & ~(page_size - 1);
128 if (props->segment_type != SSVM_SEGMENT_PRIVATE)
130 seg_name = format (0, "%d-%d%c", getpid (), smm->seg_name_counter++, 0);
131 alloc_size = (uword) segment_size + rnd_margin;
132 baseva = clib_valloc_alloc (&smm->va_allocator, alloc_size, 0);
135 clib_warning ("out of space for segments");
136 pool_put (sm->segments, fs);
142 app_worker_t *app_wrk = app_worker_get (sm->app_wrk_index);
143 application_t *app = application_get (app_wrk->app_index);
144 seg_name = format (0, "%v segment%c", app->name, 0);
147 fs->ssvm.ssvm_size = segment_size;
148 fs->ssvm.name = seg_name;
149 /* clib_mem_vm_map_shared consumes first page before requested_va */
150 fs->ssvm.requested_va = baseva + page_size;
152 if ((rv = ssvm_server_init (&fs->ssvm, props->segment_type)))
154 clib_warning ("svm_master_init ('%v', %u) failed", seg_name,
157 if (props->segment_type != SSVM_SEGMENT_PRIVATE)
158 clib_valloc_free (&smm->va_allocator, baseva);
159 pool_put (sm->segments, fs);
164 * Initialize fifo segment
166 fs->n_slices = props->n_slices;
167 fifo_segment_init (fs);
170 * Save segment index before dropping lock, if any held
172 fs_index = fs - sm->segments;
175 * Set watermarks in segment
177 fs->h->high_watermark = sm->high_watermark;
178 fs->h->low_watermark = sm->low_watermark;
179 fs->h->pct_first_alloc = props->pct_first_alloc;
180 fs->h->flags &= ~FIFO_SEGMENT_F_MEM_LIMIT;
184 if (vlib_num_workers ())
185 clib_rwlock_writer_unlock (&sm->segments_rwlock);
191 * Remove segment without lock
194 segment_manager_del_segment (segment_manager_t * sm, fifo_segment_t * fs)
196 segment_manager_main_t *smm = &sm_main;
198 if (ssvm_type (&fs->ssvm) != SSVM_SEGMENT_PRIVATE)
200 /* clib_mem_vm_map_shared consumes first page before requested_va */
201 clib_valloc_free (&smm->va_allocator,
202 fs->ssvm.requested_va - clib_mem_get_page_size ());
204 if (!segment_manager_app_detached (sm))
206 app_worker_t *app_wrk;
208 app_wrk = app_worker_get (sm->app_wrk_index);
209 segment_handle = segment_manager_segment_handle (sm, fs);
210 app_worker_del_segment_notify (app_wrk, segment_handle);
214 fifo_segment_cleanup (fs);
215 ssvm_delete (&fs->ssvm);
218 clib_memset (fs, 0xfb, sizeof (*fs));
219 pool_put (sm->segments, fs);
222 static fifo_segment_t *
223 segment_manager_get_segment_if_valid (segment_manager_t * sm,
226 if (pool_is_free_index (sm->segments, segment_index))
228 return pool_elt_at_index (sm->segments, segment_index);
232 * Removes segment after acquiring writer lock
235 sm_lock_and_del_segment_inline (segment_manager_t * sm, u32 fs_index)
240 clib_rwlock_writer_lock (&sm->segments_rwlock);
242 fs = segment_manager_get_segment_if_valid (sm, fs_index);
246 is_prealloc = fifo_segment_flags (fs) & FIFO_SEGMENT_F_IS_PREALLOCATED;
247 if (is_prealloc && !segment_manager_app_detached (sm))
250 segment_manager_del_segment (sm, fs);
253 clib_rwlock_writer_unlock (&sm->segments_rwlock);
257 segment_manager_lock_and_del_segment (segment_manager_t * sm, u32 fs_index)
259 sm_lock_and_del_segment_inline (sm, fs_index);
263 * Reads a segment from the segment manager's pool without lock
266 segment_manager_get_segment (segment_manager_t * sm, u32 segment_index)
268 return pool_elt_at_index (sm->segments, segment_index);
272 segment_manager_segment_handle (segment_manager_t * sm,
273 fifo_segment_t * segment)
275 u32 segment_index = segment_manager_segment_index (sm, segment);
276 return (((u64) segment_manager_index (sm) << 32) | segment_index);
280 segment_manager_make_segment_handle (u32 segment_manager_index,
283 return (((u64) segment_manager_index << 32) | segment_index);
287 segment_manager_get_segment_w_handle (u64 segment_handle)
289 u32 sm_index, segment_index;
290 segment_manager_t *sm;
292 segment_manager_parse_segment_handle (segment_handle, &sm_index,
294 sm = segment_manager_get (sm_index);
295 if (!sm || pool_is_free_index (sm->segments, segment_index))
297 return pool_elt_at_index (sm->segments, segment_index);
301 * Reads a segment from the segment manager's pool and acquires reader lock
303 * Caller must drop the reader's lock by calling
304 * @ref segment_manager_segment_reader_unlock once it finishes working with
308 segment_manager_get_segment_w_lock (segment_manager_t * sm, u32 segment_index)
310 clib_rwlock_reader_lock (&sm->segments_rwlock);
311 return pool_elt_at_index (sm->segments, segment_index);
315 segment_manager_segment_reader_lock (segment_manager_t * sm)
317 clib_rwlock_reader_lock (&sm->segments_rwlock);
321 segment_manager_segment_reader_unlock (segment_manager_t * sm)
323 clib_rwlock_reader_unlock (&sm->segments_rwlock);
327 segment_manager_segment_writer_unlock (segment_manager_t * sm)
329 clib_rwlock_writer_unlock (&sm->segments_rwlock);
333 segment_manager_alloc (void)
335 segment_manager_main_t *smm = &sm_main;
336 segment_manager_t *sm;
338 pool_get_zero (smm->segment_managers, sm);
339 clib_rwlock_init (&sm->segments_rwlock);
344 segment_manager_init (segment_manager_t * sm)
346 segment_manager_props_t *props;
348 props = segment_manager_properties_get (sm);
350 sm->max_fifo_size = props->max_fifo_size ?
351 props->max_fifo_size : sm_main.default_max_fifo_size;
352 sm->max_fifo_size = clib_max (sm->max_fifo_size, 4096);
354 segment_manager_set_watermarks (sm,
355 props->high_watermark,
356 props->low_watermark);
361 * Initializes segment manager based on options provided.
362 * Returns error if ssvm segment(s) allocation fails.
365 segment_manager_init_first (segment_manager_t * sm)
367 segment_manager_props_t *props;
368 uword first_seg_size;
372 segment_manager_init (sm);
373 props = segment_manager_properties_get (sm);
374 first_seg_size = clib_max (props->segment_size,
375 sm_main.default_segment_size);
377 if (props->prealloc_fifos)
379 u64 approx_total_size, max_seg_size = ((u64) 1 << 32) - (128 << 10);
380 u32 rx_rounded_data_size, tx_rounded_data_size;
381 u32 prealloc_fifo_pairs = props->prealloc_fifos;
382 u32 rx_fifo_size, tx_fifo_size, pair_size;
383 u32 approx_segment_count;
385 /* Figure out how many segments should be preallocated */
386 rx_rounded_data_size = (1 << (max_log2 (props->rx_fifo_size)));
387 tx_rounded_data_size = (1 << (max_log2 (props->tx_fifo_size)));
389 rx_fifo_size = sizeof (svm_fifo_t) + rx_rounded_data_size;
390 tx_fifo_size = sizeof (svm_fifo_t) + tx_rounded_data_size;
391 pair_size = rx_fifo_size + tx_fifo_size;
393 approx_total_size = (u64) prealloc_fifo_pairs *pair_size;
394 if (first_seg_size > approx_total_size)
395 max_seg_size = first_seg_size;
396 approx_segment_count = (approx_total_size + (max_seg_size - 1))
399 /* Allocate the segments */
400 for (i = 0; i < approx_segment_count + 1; i++)
402 fs_index = segment_manager_add_segment (sm, max_seg_size);
405 clib_warning ("Failed to preallocate segment %d", i);
409 fs = segment_manager_get_segment (sm, fs_index);
411 sm->event_queue = segment_manager_alloc_queue (fs, props);
413 fifo_segment_preallocate_fifo_pairs (fs,
416 &prealloc_fifo_pairs);
417 fifo_segment_flags (fs) = FIFO_SEGMENT_F_IS_PREALLOCATED;
418 if (prealloc_fifo_pairs == 0)
424 fs_index = segment_manager_add_segment (sm, first_seg_size);
427 clib_warning ("Failed to allocate segment");
431 fs = segment_manager_get_segment (sm, fs_index);
432 sm->event_queue = segment_manager_alloc_queue (fs, props);
434 if (props->prealloc_fifo_hdrs)
438 /* Do not preallocate on slice associated to main thread */
439 i = (vlib_num_workers ()? 1 : 0);
440 hdrs_per_slice = props->prealloc_fifo_hdrs / (fs->n_slices - i);
442 for (; i < fs->n_slices; i++)
444 if (fifo_segment_prealloc_fifo_hdrs (fs, i, hdrs_per_slice))
445 return VNET_API_ERROR_SVM_SEGMENT_CREATE_FAIL;
453 segment_manager_cleanup_detached_listener (segment_manager_t * sm)
455 app_worker_t *app_wrk;
457 app_wrk = app_worker_get_if_valid (sm->app_wrk_index);
461 app_worker_del_detached_sm (app_wrk, segment_manager_index (sm));
465 * Cleanup segment manager.
468 segment_manager_free (segment_manager_t * sm)
470 segment_manager_main_t *smm = &sm_main;
471 fifo_segment_t *fifo_segment;
473 ASSERT (vlib_get_thread_index () == 0
474 && !segment_manager_has_fifos (sm)
475 && segment_manager_app_detached (sm));
477 if (sm->flags & SEG_MANAGER_F_DETACHED_LISTENER)
478 segment_manager_cleanup_detached_listener (sm);
480 /* If we have empty preallocated segments that haven't been removed, remove
481 * them now. Apart from that, the first segment in the first segment manager
482 * is not removed when all fifos are removed. It can only be removed when
483 * the manager is explicitly deleted/detached by the app. */
484 clib_rwlock_writer_lock (&sm->segments_rwlock);
487 pool_foreach (fifo_segment, sm->segments) {
488 segment_manager_del_segment (sm, fifo_segment);
492 clib_rwlock_writer_unlock (&sm->segments_rwlock);
494 clib_rwlock_free (&sm->segments_rwlock);
496 clib_memset (sm, 0xfe, sizeof (*sm));
497 pool_put (smm->segment_managers, sm);
501 sm_free_w_index_helper (void *arg)
503 u32 sm_index = *(u32 *) arg;
504 segment_manager_t *sm;
506 ASSERT (vlib_get_thread_index () == 0);
508 if ((sm = segment_manager_get_if_valid (sm_index)))
509 segment_manager_free (sm);
513 segment_manager_free_safe (segment_manager_t * sm)
515 if (!vlib_thread_is_main_w_barrier ())
517 u32 sm_index = segment_manager_index (sm);
518 vlib_rpc_call_main_thread (sm_free_w_index_helper, (u8 *) & sm_index,
523 segment_manager_free (sm);
528 segment_manager_init_free (segment_manager_t * sm)
530 ASSERT (vlib_get_thread_index () == 0);
532 segment_manager_app_detach (sm);
533 if (segment_manager_has_fifos (sm))
534 segment_manager_del_sessions (sm);
537 ASSERT (!sm->first_is_protected || segment_manager_app_detached (sm));
538 segment_manager_free (sm);
543 segment_manager_get (u32 index)
545 return pool_elt_at_index (sm_main.segment_managers, index);
549 segment_manager_get_if_valid (u32 index)
551 if (pool_is_free_index (sm_main.segment_managers, index))
553 return pool_elt_at_index (sm_main.segment_managers, index);
557 segment_manager_index (segment_manager_t * sm)
559 return sm - sm_main.segment_managers;
563 segment_manager_has_fifos (segment_manager_t * sm)
569 segment_manager_foreach_segment_w_lock (seg, sm, ({
570 if (CLIB_DEBUG && !first && !fifo_segment_has_fifos (seg)
571 && !(fifo_segment_flags (seg) & FIFO_SEGMENT_F_IS_PREALLOCATED))
573 clib_warning ("segment %d has no fifos!",
574 segment_manager_segment_index (sm, seg));
577 if (fifo_segment_has_fifos (seg))
579 segment_manager_segment_reader_unlock (sm);
589 * Initiate disconnects for all sessions 'owned' by a segment manager
592 segment_manager_del_sessions (segment_manager_t * sm)
594 session_handle_t *handles = 0, *handle;
600 ASSERT (pool_elts (sm->segments) != 0);
602 /* Across all fifo segments used by the server */
604 segment_manager_foreach_segment_w_lock (fs, sm, ({
605 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
607 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
610 * Remove any residual sessions from the session lookup table
611 * Don't bother deleting the individual fifos, we're going to
612 * throw away the fifo segment in a minute.
616 session = session_get_if_valid (f->shr->master_session_index,
617 f->master_thread_index);
619 vec_add1 (handles, session_handle (session));
624 /* Instead of removing the segment, test when cleaning up disconnected
625 * sessions if the segment can be removed.
630 vec_foreach (handle, handles)
632 session = session_get_from_handle (*handle);
633 session_close (session);
634 /* Avoid propagating notifications back to the app */
635 session->app_wrk_index = APP_INVALID_INDEX;
640 segment_manager_try_alloc_fifos (fifo_segment_t * fifo_segment,
642 u32 rx_fifo_size, u32 tx_fifo_size,
643 svm_fifo_t ** rx_fifo, svm_fifo_t ** tx_fifo)
645 rx_fifo_size = clib_max (rx_fifo_size, sm_main.default_fifo_size);
646 *rx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
648 FIFO_SEGMENT_RX_FIFO);
650 tx_fifo_size = clib_max (tx_fifo_size, sm_main.default_fifo_size);
651 *tx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index,
653 FIFO_SEGMENT_TX_FIFO);
657 /* This would be very odd, but handle it... */
660 fifo_segment_free_fifo (fifo_segment, *tx_fifo);
669 fifo_segment_free_fifo (fifo_segment, *rx_fifo);
679 segment_manager_alloc_session_fifos (segment_manager_t * sm,
681 svm_fifo_t ** rx_fifo,
682 svm_fifo_t ** tx_fifo)
684 int alloc_fail = 1, rv = 0, new_fs_index;
685 uword free_bytes, max_free_bytes = 0;
686 segment_manager_props_t *props;
687 fifo_segment_t *fs = 0, *cur;
688 u32 sm_index, fs_index;
689 u8 added_a_segment = 0;
692 props = segment_manager_properties_get (sm);
695 * Find the first free segment to allocate the fifos in
698 segment_manager_segment_reader_lock (sm);
701 pool_foreach (cur, sm->segments) {
702 free_bytes = fifo_segment_available_bytes (cur);
703 if (free_bytes > max_free_bytes)
705 max_free_bytes = free_bytes;
713 alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index,
717 /* On success, keep lock until fifos are initialized */
722 segment_manager_segment_reader_unlock (sm);
731 ASSERT (rx_fifo && tx_fifo);
732 sm_index = segment_manager_index (sm);
733 fs_index = segment_manager_segment_index (sm, fs);
734 (*tx_fifo)->segment_manager = sm_index;
735 (*rx_fifo)->segment_manager = sm_index;
736 (*tx_fifo)->segment_index = fs_index;
737 (*rx_fifo)->segment_index = fs_index;
741 app_worker_t *app_wrk;
742 fs_handle = segment_manager_segment_handle (sm, fs);
743 app_wrk = app_worker_get (sm->app_wrk_index);
744 rv = app_worker_add_segment_notify (app_wrk, fs_handle);
746 /* Drop the lock after app is notified */
747 segment_manager_segment_reader_unlock (sm);
752 * Allocation failed, see if we can add a new segment
754 if (props->add_segment)
758 clib_warning ("Added a segment, still can't allocate a fifo");
759 segment_manager_segment_reader_unlock (sm);
760 return SESSION_E_SEG_NO_SPACE2;
762 if ((new_fs_index = segment_manager_add_segment (sm, 0)) < 0)
764 clib_warning ("Failed to add new segment");
765 return SESSION_E_SEG_CREATE;
767 fs = segment_manager_get_segment_w_lock (sm, new_fs_index);
768 alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index,
777 SESSION_DBG ("Can't add new seg and no space to allocate fifos!");
778 return SESSION_E_SEG_NO_SPACE;
783 segment_manager_dealloc_fifos (svm_fifo_t * rx_fifo, svm_fifo_t * tx_fifo)
785 segment_manager_t *sm;
789 if (!rx_fifo || !tx_fifo)
792 /* It's possible to have no segment manager if the session was removed
793 * as result of a detach. */
794 if (!(sm = segment_manager_get_if_valid (rx_fifo->segment_manager)))
797 segment_index = rx_fifo->segment_index;
798 fs = segment_manager_get_segment_w_lock (sm, segment_index);
799 fifo_segment_free_fifo (fs, rx_fifo);
800 fifo_segment_free_fifo (fs, tx_fifo);
803 * Try to remove svm segment if it has no fifos. This can be done only if
804 * the segment is not the first in the segment manager or if it is first
805 * and it is not protected. Moreover, if the segment is first and the app
806 * has detached from the segment manager, remove the segment manager.
808 if (!fifo_segment_has_fifos (fs))
810 segment_manager_segment_reader_unlock (sm);
812 /* Remove segment if it holds no fifos or first but not protected */
813 if (segment_index != 0 || !sm->first_is_protected)
814 sm_lock_and_del_segment_inline (sm, segment_index);
816 /* Remove segment manager if no sessions and detached from app */
817 if (segment_manager_app_detached (sm)
818 && !segment_manager_has_fifos (sm))
819 segment_manager_free_safe (sm);
822 segment_manager_segment_reader_unlock (sm);
826 segment_manager_detach_fifo (segment_manager_t * sm, svm_fifo_t * f)
830 fs = segment_manager_get_segment_w_lock (sm, f->segment_index);
831 fifo_segment_detach_fifo (fs, f);
832 segment_manager_segment_reader_unlock (sm);
836 segment_manager_attach_fifo (segment_manager_t * sm, svm_fifo_t * f,
841 fs = segment_manager_get_segment_w_lock (sm, f->segment_index);
842 fifo_segment_attach_fifo (fs, f, s->thread_index);
843 segment_manager_segment_reader_unlock (sm);
845 f->shr->master_session_index = s->session_index;
846 f->master_thread_index = s->thread_index;
850 segment_manager_evt_q_expected_size (u32 q_len)
852 u32 fifo_evt_size, notif_q_size, q_hdrs;
853 u32 msg_q_sz, fifo_evt_ring_sz, session_ntf_ring_sz;
855 fifo_evt_size = 1 << max_log2 (sizeof (session_event_t));
856 notif_q_size = clib_max (16, q_len >> 4);
858 msg_q_sz = q_len * sizeof (svm_msg_q_msg_t);
859 fifo_evt_ring_sz = q_len * fifo_evt_size;
860 session_ntf_ring_sz = notif_q_size * 256;
861 q_hdrs = sizeof (svm_queue_t) + sizeof (svm_msg_q_t);
863 return (msg_q_sz + fifo_evt_ring_sz + session_ntf_ring_sz + q_hdrs);
867 * Allocates shm queue in the first segment
869 * Must be called with lock held
872 segment_manager_alloc_queue (fifo_segment_t * segment,
873 segment_manager_props_t * props)
875 u32 fifo_evt_size, session_evt_size = 256, notif_q_size;
876 svm_msg_q_cfg_t _cfg, *cfg = &_cfg;
879 fifo_evt_size = sizeof (session_event_t);
880 notif_q_size = clib_max (16, props->evt_q_size >> 4);
882 svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = {
883 {props->evt_q_size, fifo_evt_size, 0},
884 {notif_q_size, session_evt_size, 0}
887 cfg->consumer_pid = 0;
889 cfg->q_nitems = props->evt_q_size;
892 q = fifo_segment_msg_q_alloc (segment, 0, cfg);
894 if (props->use_mq_eventfd)
896 if (svm_msg_q_alloc_producer_eventfd (q))
897 clib_warning ("failed to alloc eventfd");
903 segment_manager_event_queue (segment_manager_t * sm)
905 return sm->event_queue;
909 * Frees shm queue allocated in the first segment
912 segment_manager_dealloc_queue (segment_manager_t * sm, svm_queue_t * q)
914 fifo_segment_t *segment;
915 ssvm_shared_header_t *sh;
918 ASSERT (!pool_is_free_index (sm->segments, 0));
920 segment = segment_manager_get_segment_w_lock (sm, 0);
921 sh = segment->ssvm.sh;
923 oldheap = ssvm_push_heap (sh);
925 ssvm_pop_heap (oldheap);
926 segment_manager_segment_reader_unlock (sm);
930 * Init segment vm address allocator
933 segment_manager_main_init (segment_manager_main_init_args_t * a)
935 segment_manager_main_t *sm = &sm_main;
936 clib_valloc_chunk_t _ip, *ip = &_ip;
938 ip->baseva = a->baseva;
941 clib_valloc_init (&sm->va_allocator, ip, 1 /* lock */ );
943 sm->default_fifo_size = 1 << 12;
944 sm->default_segment_size = 1 << 20;
945 sm->default_app_mq_size = 128;
946 sm->default_max_fifo_size = 4 << 20;
947 sm->default_high_watermark = 80;
948 sm->default_low_watermark = 50;
951 static clib_error_t *
952 segment_manager_show_fn (vlib_main_t * vm, unformat_input_t * input,
953 vlib_cli_command_t * cmd)
955 segment_manager_main_t *smm = &sm_main;
956 u8 show_segments = 0, verbose = 0;
958 segment_manager_t *sm;
960 app_worker_t *app_wrk;
964 while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
966 if (unformat (input, "segments"))
968 else if (unformat (input, "verbose"))
971 return clib_error_return (0, "unknown input `%U'",
972 format_unformat_error, input);
974 vlib_cli_output (vm, "%d segment managers allocated",
975 pool_elts (smm->segment_managers));
976 if (verbose && pool_elts (smm->segment_managers))
978 vlib_cli_output (vm, "%-6s%=10s%=10s%=13s%=11s%=11s%=12s",
979 "Index", "AppIndex", "Segments", "MaxFifoSize",
980 "HighWater", "LowWater", "FifoTuning");
983 pool_foreach (sm, smm->segment_managers) {
984 app_wrk = app_worker_get_if_valid (sm->app_wrk_index);
985 app = app_wrk ? application_get (app_wrk->app_index) : 0;
986 custom_logic = (app && (app->cb_fns.fifo_tuning_callback)) ? 1 : 0;
987 max_fifo_size = sm->max_fifo_size;
989 vlib_cli_output (vm, "%-6d%=10d%=10d%=13U%=11d%=11d%=12s",
990 segment_manager_index (sm),
991 sm->app_wrk_index, pool_elts (sm->segments),
992 format_memory_size, max_fifo_size,
993 sm->high_watermark, sm->low_watermark,
994 custom_logic ? "custom" : "none");
998 vlib_cli_output (vm, "\n");
1002 vlib_cli_output (vm, "%U", format_fifo_segment, 0, verbose);
1005 pool_foreach (sm, smm->segment_managers) {
1006 segment_manager_foreach_segment_w_lock (seg, sm, ({
1007 vlib_cli_output (vm, "%U", format_fifo_segment, seg, verbose);
1017 VLIB_CLI_COMMAND (segment_manager_show_command, static) =
1019 .path = "show segment-manager",
1020 .short_help = "show segment-manager [segments][verbose]",
1021 .function = segment_manager_show_fn,
1026 segment_manager_format_sessions (segment_manager_t * sm, int verbose)
1028 vlib_main_t *vm = vlib_get_main ();
1029 app_worker_t *app_wrk;
1039 vlib_cli_output (vm, "%-40s%-20s%-15s%-10s", "Connection", "App",
1040 "API Client", "SegManager");
1042 vlib_cli_output (vm, "%-40s%-20s", "Connection", "App");
1046 app_wrk = app_worker_get (sm->app_wrk_index);
1047 app_name = application_name_from_index (app_wrk->app_index);
1049 clib_rwlock_reader_lock (&sm->segments_rwlock);
1052 pool_foreach (fs, sm->segments) {
1053 for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
1055 f = fifo_segment_get_slice_fifo_list (fs, slice_index);
1058 u32 session_index, thread_index;
1061 session_index = f->shr->master_session_index;
1062 thread_index = f->master_thread_index;
1064 session = session_get (session_index, thread_index);
1065 str = format (0, "%U", format_session, session, verbose);
1068 s = format (s, "%-40v%-20v%-15u%-10u", str, app_name,
1069 app_wrk->api_client_index,
1070 app_wrk->connects_seg_manager);
1072 s = format (s, "%-40v%-20v", str, app_name);
1074 vlib_cli_output (vm, "%v", s);
1075 vec_reset_length (s);
1085 clib_rwlock_reader_unlock (&sm->segments_rwlock);
1089 segment_manager_set_watermarks (segment_manager_t * sm,
1090 u8 high_watermark, u8 low_watermark)
1092 ASSERT (high_watermark <= 100 && low_watermark <= 100 &&
1093 low_watermark <= high_watermark);
1095 sm->high_watermark = high_watermark;
1096 sm->low_watermark = low_watermark;
1100 * fd.io coding-style-patch-verification: ON
1103 * eval: (c-set-style "gnu")