X-Git-Url: https://gerrit.fd.io/r/gitweb?p=vpp.git;a=blobdiff_plain;f=src%2Fvnet%2Fsession%2Fsegment_manager.c;h=a7ce989e8e3bf5eda6bced69badbdf2410de67c0;hp=f8af3fb45c86766a92016cba91e32a0b80e00864;hb=da78c5abc;hpb=a332c46a51f9b4e13963340dfee1318e7513c124 diff --git a/src/vnet/session/segment_manager.c b/src/vnet/session/segment_manager.c index f8af3fb45c8..a7ce989e8e3 100644 --- a/src/vnet/session/segment_manager.c +++ b/src/vnet/session/segment_manager.c @@ -1,5 +1,5 @@ /* - * Copyright (c) 2017 Cisco and/or its affiliates. + * Copyright (c) 2017-2019 Cisco and/or its affiliates. * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at: @@ -17,103 +17,274 @@ #include #include -segment_manager_main_t segment_manager_main; - -/** - * Counter used to build segment names - */ -static u32 segment_name_counter = 0; - -/** - * Default fifo and segment size. TODO config. - */ -u32 default_fifo_size = 1 << 12; -u32 default_segment_size = 1 << 20; +typedef struct segment_manager_main_ +{ + segment_manager_t *segment_managers; /**< Pool of segment managers */ + u32 seg_name_counter; /**< Counter for segment names */ -segment_manager_properties_t * + /* + * Configuration + */ + u32 default_fifo_size; /**< default rx/tx fifo size */ + u32 default_segment_size; /**< default fifo segment size */ + u32 default_app_mq_size; /**< default app msg q size */ + u32 default_max_fifo_size; /**< default max fifo size */ + u8 default_high_watermark; /**< default high watermark % */ + u8 default_low_watermark; /**< default low watermark % */ +} segment_manager_main_t; + +static segment_manager_main_t sm_main; + +#define segment_manager_foreach_segment_w_lock(VAR, SM, BODY) \ +do { \ + clib_rwlock_reader_lock (&(SM)->segments_rwlock); \ + pool_foreach((VAR), ((SM)->segments)) (BODY); \ + clib_rwlock_reader_unlock (&(SM)->segments_rwlock); \ +} while (0) + +static segment_manager_props_t * segment_manager_properties_get (segment_manager_t * sm) { - return application_get_segment_manager_properties (sm->app_index); + app_worker_t *app_wrk = app_worker_get (sm->app_wrk_index); + return application_get_segment_manager_properties (app_wrk->app_index); } -segment_manager_properties_t * -segment_manager_properties_init (segment_manager_properties_t * props) +segment_manager_props_t * +segment_manager_props_init (segment_manager_props_t * props) { - props->add_segment_size = default_segment_size; - props->rx_fifo_size = default_fifo_size; - props->tx_fifo_size = default_fifo_size; + props->add_segment_size = sm_main.default_segment_size; + props->rx_fifo_size = sm_main.default_fifo_size; + props->tx_fifo_size = sm_main.default_fifo_size; + props->evt_q_size = sm_main.default_app_mq_size; + props->max_fifo_size = sm_main.default_max_fifo_size; + props->high_watermark = sm_main.default_high_watermark; + props->low_watermark = sm_main.default_low_watermark; + props->n_slices = vlib_num_workers () + 1; return props; } -static u8 +u8 segment_manager_app_detached (segment_manager_t * sm) { - return (sm->app_index == SEGMENT_MANAGER_INVALID_APP_INDEX); + return (sm->flags & SEG_MANAGER_F_DETACHED); } void segment_manager_app_detach (segment_manager_t * sm) { - sm->app_index = SEGMENT_MANAGER_INVALID_APP_INDEX; + sm->flags |= SEG_MANAGER_F_DETACHED; } always_inline u32 -segment_manager_segment_index (segment_manager_t * sm, - svm_fifo_segment_private_t * seg) +segment_manager_segment_index (segment_manager_t * sm, fifo_segment_t * seg) { return (seg - sm->segments); } /** - * Remove segment without lock + * Adds segment to segment manager's pool + * + * If needed a writer's lock is acquired before allocating a new segment + * to avoid affecting any of the segments pool readers. */ -always_inline void -segment_manager_del_segment (segment_manager_t * sm, - svm_fifo_segment_private_t * fs) +int +segment_manager_add_segment (segment_manager_t *sm, uword segment_size, + u8 notify_app) { - segment_manager_main_t *smm = &segment_manager_main; + segment_manager_main_t *smm = &sm_main; + segment_manager_props_t *props; + fifo_segment_t *fs; + u32 fs_index = ~0; + u8 *seg_name; + int rv; + + props = segment_manager_properties_get (sm); + + /* Not configured for addition of new segments and not first */ + if (!props->add_segment && !segment_size) + { + clib_warning ("cannot allocate new segment"); + return VNET_API_ERROR_INVALID_VALUE; + } + + /* + * Allocate fifo segment and grab lock if needed + */ + if (vlib_num_workers ()) + clib_rwlock_writer_lock (&sm->segments_rwlock); + + pool_get_zero (sm->segments, fs); + + /* + * Allocate ssvm segment + */ + segment_size = segment_size ? segment_size : props->add_segment_size; + segment_size = round_pow2 (segment_size, clib_mem_get_page_size ()); + + if (props->segment_type != SSVM_SEGMENT_PRIVATE) + { + seg_name = format (0, "%d-%d%c", getpid (), smm->seg_name_counter++, 0); + } + else + { + app_worker_t *app_wrk = app_worker_get (sm->app_wrk_index); + application_t *app = application_get (app_wrk->app_index); + seg_name = format (0, "%v segment%c", app->name, 0); + } + + fs->ssvm.ssvm_size = segment_size; + fs->ssvm.name = seg_name; + fs->ssvm.requested_va = 0; + + if ((rv = ssvm_server_init (&fs->ssvm, props->segment_type))) + { + clib_warning ("svm_master_init ('%v', %u) failed", seg_name, + segment_size); + pool_put (sm->segments, fs); + goto done; + } + + /* + * Initialize fifo segment + */ + fs->n_slices = props->n_slices; + fifo_segment_init (fs); + + /* + * Save segment index before dropping lock, if any held + */ + fs_index = fs - sm->segments; + + /* + * Set watermarks in segment + */ + fs->h->high_watermark = sm->high_watermark; + fs->h->low_watermark = sm->low_watermark; + fs->h->pct_first_alloc = props->pct_first_alloc; + fs->h->flags &= ~FIFO_SEGMENT_F_MEM_LIMIT; + + if (notify_app) + { + app_worker_t *app_wrk; + u64 fs_handle; + fs_handle = segment_manager_segment_handle (sm, fs); + app_wrk = app_worker_get (sm->app_wrk_index); + rv = app_worker_add_segment_notify (app_wrk, fs_handle); + if (rv) + return rv; + } +done: + + if (vlib_num_workers ()) + clib_rwlock_writer_unlock (&sm->segments_rwlock); + + return fs_index; +} +/** + * Remove segment without lock + */ +void +segment_manager_del_segment (segment_manager_t * sm, fifo_segment_t * fs) +{ if (ssvm_type (&fs->ssvm) != SSVM_SEGMENT_PRIVATE) - clib_valloc_free (&smm->va_allocator, fs->ssvm.requested_va); + { + if (!segment_manager_app_detached (sm)) + { + app_worker_t *app_wrk; + u64 segment_handle; + app_wrk = app_worker_get (sm->app_wrk_index); + segment_handle = segment_manager_segment_handle (sm, fs); + app_worker_del_segment_notify (app_wrk, segment_handle); + } + } + fifo_segment_cleanup (fs); ssvm_delete (&fs->ssvm); if (CLIB_DEBUG) - memset (fs, 0xfb, sizeof (*fs)); + clib_memset (fs, 0xfb, sizeof (*fs)); pool_put (sm->segments, fs); } +static fifo_segment_t * +segment_manager_get_segment_if_valid (segment_manager_t * sm, + u32 segment_index) +{ + if (pool_is_free_index (sm->segments, segment_index)) + return 0; + return pool_elt_at_index (sm->segments, segment_index); +} + /** * Removes segment after acquiring writer lock */ -always_inline void -segment_manager_lock_and_del_segment (segment_manager_t * sm, u32 fs_index) +static inline void +sm_lock_and_del_segment_inline (segment_manager_t * sm, u32 fs_index) { - svm_fifo_segment_private_t *fs; + fifo_segment_t *fs; u8 is_prealloc; clib_rwlock_writer_lock (&sm->segments_rwlock); - fs = segment_manager_get_segment (sm, fs_index); - is_prealloc = svm_fifo_segment_flags (fs) & FIFO_SEGMENT_F_IS_PREALLOCATED; + + fs = segment_manager_get_segment_if_valid (sm, fs_index); + if (!fs) + goto done; + + is_prealloc = fifo_segment_flags (fs) & FIFO_SEGMENT_F_IS_PREALLOCATED; if (is_prealloc && !segment_manager_app_detached (sm)) - { - clib_rwlock_writer_unlock (&sm->segments_rwlock); - return; - } + goto done; segment_manager_del_segment (sm, fs); + +done: clib_rwlock_writer_unlock (&sm->segments_rwlock); } +void +segment_manager_lock_and_del_segment (segment_manager_t * sm, u32 fs_index) +{ + sm_lock_and_del_segment_inline (sm, fs_index); +} + /** * Reads a segment from the segment manager's pool without lock */ -svm_fifo_segment_private_t * +fifo_segment_t * segment_manager_get_segment (segment_manager_t * sm, u32 segment_index) { return pool_elt_at_index (sm->segments, segment_index); } +u64 +segment_manager_segment_handle (segment_manager_t * sm, + fifo_segment_t * segment) +{ + u32 segment_index = segment_manager_segment_index (sm, segment); + return (((u64) segment_manager_index (sm) << 32) | segment_index); +} + +u64 +segment_manager_make_segment_handle (u32 segment_manager_index, + u32 segment_index) +{ + return (((u64) segment_manager_index << 32) | segment_index); +} + +fifo_segment_t * +segment_manager_get_segment_w_handle (u64 segment_handle) +{ + u32 sm_index, segment_index; + segment_manager_t *sm; + + segment_manager_parse_segment_handle (segment_handle, &sm_index, + &segment_index); + sm = segment_manager_get (sm_index); + if (!sm || pool_is_free_index (sm->segments, segment_index)) + return 0; + return pool_elt_at_index (sm->segments, segment_index); +} + /** * Reads a segment from the segment manager's pool and acquires reader lock * @@ -121,13 +292,19 @@ segment_manager_get_segment (segment_manager_t * sm, u32 segment_index) * @ref segment_manager_segment_reader_unlock once it finishes working with * the segment. */ -svm_fifo_segment_private_t * +fifo_segment_t * segment_manager_get_segment_w_lock (segment_manager_t * sm, u32 segment_index) { clib_rwlock_reader_lock (&sm->segments_rwlock); return pool_elt_at_index (sm->segments, segment_index); } +void +segment_manager_segment_reader_lock (segment_manager_t * sm) +{ + clib_rwlock_reader_lock (&sm->segments_rwlock); +} + void segment_manager_segment_reader_unlock (segment_manager_t * sm) { @@ -140,125 +317,59 @@ segment_manager_segment_writer_unlock (segment_manager_t * sm) clib_rwlock_writer_unlock (&sm->segments_rwlock); } -/** - * Adds segment to segment manager's pool - * - * If needed a writer's lock is acquired before allocating a new segment - * to avoid affecting any of the segments pool readers. - */ -always_inline int -segment_manager_add_segment (segment_manager_t * sm, u32 segment_size) -{ - segment_manager_main_t *smm = &segment_manager_main; - u32 rnd_margin = 128 << 10, seg_index; - segment_manager_properties_t *props; - uword baseva = (u64) ~ 0, alloc_size; - svm_fifo_segment_private_t *seg; - u8 *seg_name; - int rv; - - props = segment_manager_properties_get (sm); - - /* Not configured for addition of new segments and not first */ - if (!props->add_segment && !segment_size) - { - clib_warning ("cannot allocate new segment"); - return VNET_API_ERROR_INVALID_VALUE; - } - - /* - * Allocate fifo segment and lock if needed - */ - if (vlib_num_workers ()) - { - clib_rwlock_writer_lock (&sm->segments_rwlock); - pool_get (sm->segments, seg); - } - else - { - pool_get (sm->segments, seg); - } - memset (seg, 0, sizeof (*seg)); - - /* - * Initialize ssvm segment and svm fifo private header - */ - segment_size = segment_size ? segment_size : props->add_segment_size; - if (props->segment_type != SSVM_SEGMENT_PRIVATE) - { - seg_name = format (0, "%d-%d%c", getpid (), segment_name_counter++, 0); - alloc_size = segment_size + rnd_margin; - baseva = clib_valloc_alloc (&smm->va_allocator, alloc_size, 0); - if (!baseva) - { - clib_warning ("out of space for segments"); - return -1; - } - } - else - seg_name = format (0, "%s%c", "process-private-segment", 0); - - seg->ssvm.ssvm_size = segment_size; - seg->ssvm.name = seg_name; - seg->ssvm.requested_va = baseva; - - if ((rv = ssvm_master_init (&seg->ssvm, props->segment_type))) - { - clib_warning ("svm_master_init ('%v', %u) failed", seg_name, - segment_size); - - if (props->segment_type != SSVM_SEGMENT_PRIVATE) - clib_valloc_free (&smm->va_allocator, baseva); - pool_put (sm->segments, seg); - return (rv); - } - - svm_fifo_segment_init (seg); - - /* - * Save segment index before dropping lock, if any held - */ - seg_index = seg - sm->segments; - - if (vlib_num_workers ()) - clib_rwlock_writer_unlock (&sm->segments_rwlock); - - return seg_index; -} - segment_manager_t * -segment_manager_new () +segment_manager_alloc (void) { - segment_manager_main_t *smm = &segment_manager_main; + segment_manager_main_t *smm = &sm_main; segment_manager_t *sm; - pool_get (smm->segment_managers, sm); - memset (sm, 0, sizeof (*sm)); + + pool_get_zero (smm->segment_managers, sm); clib_rwlock_init (&sm->segments_rwlock); return sm; } +int +segment_manager_init (segment_manager_t * sm) +{ + segment_manager_props_t *props; + + props = segment_manager_properties_get (sm); + + sm->max_fifo_size = props->max_fifo_size ? + props->max_fifo_size : sm_main.default_max_fifo_size; + sm->max_fifo_size = clib_max (sm->max_fifo_size, 4096); + + segment_manager_set_watermarks (sm, + props->high_watermark, + props->low_watermark); + return 0; +} + /** * Initializes segment manager based on options provided. * Returns error if ssvm segment(s) allocation fails. */ int -segment_manager_init (segment_manager_t * sm, u32 first_seg_size, - u32 evt_q_size, u32 prealloc_fifo_pairs) -{ - u32 rx_fifo_size, tx_fifo_size, pair_size; - u32 rx_rounded_data_size, tx_rounded_data_size; - u64 approx_total_size, max_seg_size = - ((u64) 1 << 32) - clib_mem_get_page_size (); - segment_manager_properties_t *props; - svm_fifo_segment_private_t *segment; - u32 approx_segment_count; - int seg_index, i; +segment_manager_init_first (segment_manager_t * sm) +{ + segment_manager_props_t *props; + uword first_seg_size; + fifo_segment_t *fs; + int fs_index, i; + segment_manager_init (sm); props = segment_manager_properties_get (sm); - first_seg_size = clib_max (first_seg_size, default_segment_size); + first_seg_size = clib_max (props->segment_size, + sm_main.default_segment_size); - if (prealloc_fifo_pairs) + if (props->prealloc_fifos) { + u64 approx_total_size, max_seg_size = ((u64) 1 << 32) - (128 << 10); + u32 rx_rounded_data_size, tx_rounded_data_size; + u32 prealloc_fifo_pairs = props->prealloc_fifos; + u32 rx_fifo_size, tx_fifo_size, pair_size; + u32 approx_segment_count; + /* Figure out how many segments should be preallocated */ rx_rounded_data_size = (1 << (max_log2 (props->rx_fifo_size))); tx_rounded_data_size = (1 << (max_log2 (props->tx_fifo_size))); @@ -276,56 +387,183 @@ segment_manager_init (segment_manager_t * sm, u32 first_seg_size, /* Allocate the segments */ for (i = 0; i < approx_segment_count + 1; i++) { - seg_index = segment_manager_add_segment (sm, max_seg_size); - if (seg_index < 0) + fs_index = segment_manager_add_segment (sm, max_seg_size, 0); + if (fs_index < 0) { clib_warning ("Failed to preallocate segment %d", i); - return seg_index; + return fs_index; } + fs = segment_manager_get_segment (sm, fs_index); if (i == 0) - sm->event_queue = segment_manager_alloc_queue (sm, evt_q_size); - - segment = segment_manager_get_segment (sm, seg_index); - svm_fifo_segment_preallocate_fifo_pairs (segment, - props->rx_fifo_size, - props->tx_fifo_size, - &prealloc_fifo_pairs); - svm_fifo_segment_flags (segment) = FIFO_SEGMENT_F_IS_PREALLOCATED; + sm->event_queue = segment_manager_alloc_queue (fs, props); + + fifo_segment_preallocate_fifo_pairs (fs, + props->rx_fifo_size, + props->tx_fifo_size, + &prealloc_fifo_pairs); + fifo_segment_flags (fs) = FIFO_SEGMENT_F_IS_PREALLOCATED; if (prealloc_fifo_pairs == 0) break; } + return 0; } - else + + fs_index = segment_manager_add_segment (sm, first_seg_size, 0); + if (fs_index < 0) + { + clib_warning ("Failed to allocate segment"); + return fs_index; + } + + fs = segment_manager_get_segment (sm, fs_index); + sm->event_queue = segment_manager_alloc_queue (fs, props); + + if (props->prealloc_fifo_hdrs) { - seg_index = segment_manager_add_segment (sm, first_seg_size); - if (seg_index) + u32 hdrs_per_slice; + + /* Do not preallocate on slice associated to main thread */ + i = (vlib_num_workers ()? 1 : 0); + hdrs_per_slice = props->prealloc_fifo_hdrs / (fs->n_slices - i); + + for (; i < fs->n_slices; i++) { - clib_warning ("Failed to allocate segment"); - return seg_index; + if (fifo_segment_prealloc_fifo_hdrs (fs, i, hdrs_per_slice)) + return VNET_API_ERROR_SVM_SEGMENT_CREATE_FAIL; } - sm->event_queue = segment_manager_alloc_queue (sm, evt_q_size); } return 0; } +void +segment_manager_cleanup_detached_listener (segment_manager_t * sm) +{ + app_worker_t *app_wrk; + + app_wrk = app_worker_get_if_valid (sm->app_wrk_index); + if (!app_wrk) + return; + + app_worker_del_detached_sm (app_wrk, segment_manager_index (sm)); +} + +/** + * Cleanup segment manager. + */ +void +segment_manager_free (segment_manager_t * sm) +{ + segment_manager_main_t *smm = &sm_main; + fifo_segment_t *fifo_segment; + + ASSERT (vlib_get_thread_index () == 0 + && !segment_manager_has_fifos (sm) + && segment_manager_app_detached (sm)); + + if (sm->flags & SEG_MANAGER_F_DETACHED_LISTENER) + segment_manager_cleanup_detached_listener (sm); + + /* If we have empty preallocated segments that haven't been removed, remove + * them now. Apart from that, the first segment in the first segment manager + * is not removed when all fifos are removed. It can only be removed when + * the manager is explicitly deleted/detached by the app. */ + clib_rwlock_writer_lock (&sm->segments_rwlock); + + /* *INDENT-OFF* */ + pool_foreach (fifo_segment, sm->segments) { + segment_manager_del_segment (sm, fifo_segment); + } + /* *INDENT-ON* */ + + pool_free (sm->segments); + clib_rwlock_writer_unlock (&sm->segments_rwlock); + + clib_rwlock_free (&sm->segments_rwlock); + if (CLIB_DEBUG) + clib_memset (sm, 0xfe, sizeof (*sm)); + pool_put (smm->segment_managers, sm); +} + +static void +sm_free_w_index_helper (void *arg) +{ + u32 sm_index = *(u32 *) arg; + segment_manager_t *sm; + + ASSERT (vlib_get_thread_index () == 0); + + if ((sm = segment_manager_get_if_valid (sm_index))) + segment_manager_free (sm); +} + +void +segment_manager_free_safe (segment_manager_t *sm) +{ + if (!vlib_thread_is_main_w_barrier ()) + { + u32 sm_index = segment_manager_index (sm); + vlib_rpc_call_main_thread (sm_free_w_index_helper, (u8 *) & sm_index, + sizeof (sm_index)); + } + else + { + segment_manager_free (sm); + } +} + +void +segment_manager_init_free (segment_manager_t * sm) +{ + ASSERT (vlib_get_thread_index () == 0); + + segment_manager_app_detach (sm); + if (segment_manager_has_fifos (sm)) + segment_manager_del_sessions (sm); + else + { + ASSERT (!sm->first_is_protected || segment_manager_app_detached (sm)); + segment_manager_free (sm); + } +} + +segment_manager_t * +segment_manager_get (u32 index) +{ + return pool_elt_at_index (sm_main.segment_managers, index); +} + +segment_manager_t * +segment_manager_get_if_valid (u32 index) +{ + if (pool_is_free_index (sm_main.segment_managers, index)) + return 0; + return pool_elt_at_index (sm_main.segment_managers, index); +} + +u32 +segment_manager_index (segment_manager_t * sm) +{ + return sm - sm_main.segment_managers; +} + u8 segment_manager_has_fifos (segment_manager_t * sm) { - svm_fifo_segment_private_t *seg; + fifo_segment_t *seg; u8 first = 1; /* *INDENT-OFF* */ segment_manager_foreach_segment_w_lock (seg, sm, ({ - if (CLIB_DEBUG && !first && !svm_fifo_segment_has_fifos (seg) - && !(svm_fifo_segment_flags (seg) & FIFO_SEGMENT_F_IS_PREALLOCATED)) + if (CLIB_DEBUG && !first && !fifo_segment_has_fifos (seg) + && !(fifo_segment_flags (seg) & FIFO_SEGMENT_F_IS_PREALLOCATED)) { clib_warning ("segment %d has no fifos!", segment_manager_segment_index (sm, seg)); first = 0; } - if (svm_fifo_segment_has_fifos (seg)) + if (fifo_segment_has_fifos (seg)) { segment_manager_segment_reader_unlock (sm); return 1; @@ -342,28 +580,34 @@ segment_manager_has_fifos (segment_manager_t * sm) void segment_manager_del_sessions (segment_manager_t * sm) { - svm_fifo_segment_private_t *fifo_segment; - stream_session_t *session; - svm_fifo_t *fifo; + session_handle_t *handles = 0, *handle; + fifo_segment_t *fs; + session_t *session; + int slice_index; + svm_fifo_t *f; ASSERT (pool_elts (sm->segments) != 0); /* Across all fifo segments used by the server */ /* *INDENT-OFF* */ - segment_manager_foreach_segment_w_lock (fifo_segment, sm, ({ - fifo = svm_fifo_segment_get_fifo_list (fifo_segment); - - /* - * Remove any residual sessions from the session lookup table - * Don't bother deleting the individual fifos, we're going to - * throw away the fifo segment in a minute. - */ - while (fifo) + segment_manager_foreach_segment_w_lock (fs, sm, ({ + for (slice_index = 0; slice_index < fs->n_slices; slice_index++) { - session = session_get (fifo->master_session_index, - fifo->master_thread_index); - stream_session_disconnect (session); - fifo = fifo->next; + f = fifo_segment_get_slice_fifo_list (fs, slice_index); + + /* + * Remove any residual sessions from the session lookup table + * Don't bother deleting the individual fifos, we're going to + * throw away the fifo segment in a minute. + */ + while (f) + { + session = session_get_if_valid (f->shr->master_session_index, + f->master_thread_index); + if (session) + vec_add1 (handles, session_handle (session)); + f = f->next; + } } /* Instead of removing the segment, test when cleaning up disconnected @@ -371,77 +615,92 @@ segment_manager_del_sessions (segment_manager_t * sm) */ })); /* *INDENT-ON* */ + + vec_foreach (handle, handles) + { + session = session_get_from_handle (*handle); + session_close (session); + /* Avoid propagating notifications back to the app */ + session->app_wrk_index = APP_INVALID_INDEX; + } + vec_free (handles); } /** - * Removes segment manager. - * - * Since the fifos allocated in the segment keep backpointers to the sessions - * prior to removing the segment, we call session disconnect. This - * subsequently propagates into transport. + * Initiate disconnects for sessions in specified state 'owned' by a segment + * manager */ void -segment_manager_del (segment_manager_t * sm) +segment_manager_del_sessions_filter (segment_manager_t *sm, + session_state_t *states) { - segment_manager_main_t *smm = &segment_manager_main; - svm_fifo_segment_private_t *fifo_segment; - - ASSERT (!segment_manager_has_fifos (sm) - && segment_manager_app_detached (sm)); - - /* If we have empty preallocated segments that haven't been removed, remove - * them now. Apart from that, the first segment in the first segment manager - * is not removed when all fifos are removed. It can only be removed when - * the manager is explicitly deleted/detached by the app. */ - clib_rwlock_writer_lock (&sm->segments_rwlock); - - /* *INDENT-OFF* */ - pool_foreach (fifo_segment, sm->segments, ({ - segment_manager_del_segment (sm, fifo_segment); - })); - /* *INDENT-ON* */ + session_handle_t *handles = 0, *handle; + fifo_segment_t *fs; + session_t *session; + int slice_index; + svm_fifo_t *f; - clib_rwlock_writer_unlock (&sm->segments_rwlock); + ASSERT (pool_elts (sm->segments) != 0); - clib_rwlock_free (&sm->segments_rwlock); - if (CLIB_DEBUG) - memset (sm, 0xfe, sizeof (*sm)); - pool_put (smm->segment_managers, sm); -} + /* Across all fifo segments used by the server */ + segment_manager_foreach_segment_w_lock ( + fs, sm, ({ + for (slice_index = 0; slice_index < fs->n_slices; slice_index++) + { + f = fifo_segment_get_slice_fifo_list (fs, slice_index); + while (f) + { + session = session_get_if_valid (f->shr->master_session_index, + f->master_thread_index); + if (session) + { + session_state_t *state; + vec_foreach (state, states) + { + if (session->session_state == *state) + { + vec_add1 (handles, session_handle (session)); + break; + } + } + } + f = f->next; + } + } + })); -void -segment_manager_init_del (segment_manager_t * sm) -{ - segment_manager_app_detach (sm); - if (segment_manager_has_fifos (sm)) - segment_manager_del_sessions (sm); - else + vec_foreach (handle, handles) { - ASSERT (!sm->first_is_protected || segment_manager_app_detached (sm)); - segment_manager_del (sm); + session = session_get_from_handle (*handle); + session_close (session); + /* Avoid propagating notifications back to the app */ + session->app_wrk_index = APP_INVALID_INDEX; } + vec_free (handles); } -always_inline int -segment_try_alloc_fifos (svm_fifo_segment_private_t * fifo_segment, - u32 rx_fifo_size, u32 tx_fifo_size, - svm_fifo_t ** rx_fifo, svm_fifo_t ** tx_fifo) +int +segment_manager_try_alloc_fifos (fifo_segment_t * fifo_segment, + u32 thread_index, + u32 rx_fifo_size, u32 tx_fifo_size, + svm_fifo_t ** rx_fifo, svm_fifo_t ** tx_fifo) { - rx_fifo_size = clib_max (rx_fifo_size, default_fifo_size); - *rx_fifo = svm_fifo_segment_alloc_fifo (fifo_segment, rx_fifo_size, - FIFO_SEGMENT_RX_FREELIST); + rx_fifo_size = clib_max (rx_fifo_size, sm_main.default_fifo_size); + *rx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index, + rx_fifo_size, + FIFO_SEGMENT_RX_FIFO); - tx_fifo_size = clib_max (tx_fifo_size, default_fifo_size); - *tx_fifo = svm_fifo_segment_alloc_fifo (fifo_segment, tx_fifo_size, - FIFO_SEGMENT_TX_FREELIST); + tx_fifo_size = clib_max (tx_fifo_size, sm_main.default_fifo_size); + *tx_fifo = fifo_segment_alloc_fifo_w_slice (fifo_segment, thread_index, + tx_fifo_size, + FIFO_SEGMENT_TX_FIFO); if (*rx_fifo == 0) { /* This would be very odd, but handle it... */ if (*tx_fifo != 0) { - svm_fifo_segment_free_fifo (fifo_segment, *tx_fifo, - FIFO_SEGMENT_TX_FREELIST); + fifo_segment_free_fifo (fifo_segment, *tx_fifo); *tx_fifo = 0; } return -1; @@ -450,8 +709,7 @@ segment_try_alloc_fifos (svm_fifo_segment_private_t * fifo_segment, { if (*rx_fifo != 0) { - svm_fifo_segment_free_fifo (fifo_segment, *rx_fifo, - FIFO_SEGMENT_RX_FREELIST); + fifo_segment_free_fifo (fifo_segment, *rx_fifo); *rx_fifo = 0; } return -1; @@ -462,102 +720,111 @@ segment_try_alloc_fifos (svm_fifo_segment_private_t * fifo_segment, int segment_manager_alloc_session_fifos (segment_manager_t * sm, + u32 thread_index, svm_fifo_t ** rx_fifo, - svm_fifo_t ** tx_fifo, - u32 * fifo_segment_index) + svm_fifo_t ** tx_fifo) { - svm_fifo_segment_private_t *fifo_segment; int alloc_fail = 1, rv = 0, new_fs_index; - segment_manager_properties_t *props; - u8 added_a_segment = 0; - u32 sm_index; + uword free_bytes, max_free_bytes = 0; + segment_manager_props_t *props; + fifo_segment_t *fs = 0, *cur; + u32 sm_index, fs_index; - ASSERT (pool_elts (sm->segments) != 0); props = segment_manager_properties_get (sm); /* * Find the first free segment to allocate the fifos in */ - /* *INDENT-OFF* */ - segment_manager_foreach_segment_w_lock (fifo_segment, sm, ({ - alloc_fail = segment_try_alloc_fifos (fifo_segment, props->rx_fifo_size, - props->tx_fifo_size, rx_fifo, - tx_fifo); - /* Exit with lock held, drop it after notifying app */ - if (!alloc_fail) - goto alloc_success; - })); - /* *INDENT-ON* */ + segment_manager_segment_reader_lock (sm); -alloc_check: + pool_foreach (cur, sm->segments) { + if (fifo_segment_flags (cur) & FIFO_SEGMENT_F_CUSTOM_USE) + continue; + free_bytes = fifo_segment_available_bytes (cur); + if (free_bytes > max_free_bytes) + { + max_free_bytes = free_bytes; + fs = cur; + } + } - if (!alloc_fail) + if (fs) { - - alloc_success: - - ASSERT (rx_fifo && tx_fifo); - sm_index = segment_manager_index (sm); - (*tx_fifo)->segment_manager = sm_index; - (*rx_fifo)->segment_manager = sm_index; - *fifo_segment_index = segment_manager_segment_index (sm, fifo_segment); - - if (added_a_segment) - rv = application_add_segment_notify (sm->app_index, - &fifo_segment->ssvm); - /* Drop the lock after app is notified */ - segment_manager_segment_reader_unlock (sm); - return rv; + alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index, + props->rx_fifo_size, + props->tx_fifo_size, + rx_fifo, tx_fifo); + /* On success, keep lock until fifos are initialized */ + if (!alloc_fail) + goto alloc_success; } + segment_manager_segment_reader_unlock (sm); + /* * Allocation failed, see if we can add a new segment */ if (props->add_segment) { - if (added_a_segment) + if ((new_fs_index = segment_manager_add_segment (sm, 0, 1)) < 0) { - clib_warning ("Added a segment, still can't allocate a fifo"); - segment_manager_segment_reader_unlock (sm); - return SESSION_ERROR_NEW_SEG_NO_SPACE; + clib_warning ("Failed to add new segment"); + return SESSION_E_SEG_CREATE; } - if ((new_fs_index = segment_manager_add_segment (sm, 0)) < 0) + fs = segment_manager_get_segment_w_lock (sm, new_fs_index); + alloc_fail = segment_manager_try_alloc_fifos (fs, thread_index, + props->rx_fifo_size, + props->tx_fifo_size, + rx_fifo, tx_fifo); + if (alloc_fail) { - clib_warning ("Failed to add new segment"); - return SESSION_ERROR_SEG_CREATE; + clib_warning ("Added a segment, still can't allocate a fifo"); + segment_manager_segment_reader_unlock (sm); + return SESSION_E_SEG_NO_SPACE2; } - fifo_segment = segment_manager_get_segment_w_lock (sm, new_fs_index); - alloc_fail = segment_try_alloc_fifos (fifo_segment, props->rx_fifo_size, - props->tx_fifo_size, rx_fifo, - tx_fifo); - added_a_segment = 1; - goto alloc_check; } else { - clib_warning ("Can't add new seg and no space to allocate fifos!"); - return SESSION_ERROR_NO_SPACE; + SESSION_DBG ("Can't add new seg and no space to allocate fifos!"); + return SESSION_E_SEG_NO_SPACE; } + +alloc_success: + ASSERT (rx_fifo && tx_fifo); + + sm_index = segment_manager_index (sm); + fs_index = segment_manager_segment_index (sm, fs); + (*tx_fifo)->segment_manager = sm_index; + (*rx_fifo)->segment_manager = sm_index; + (*tx_fifo)->segment_index = fs_index; + (*rx_fifo)->segment_index = fs_index; + + /* Drop the lock after app is notified */ + segment_manager_segment_reader_unlock (sm); + + return rv; } void -segment_manager_dealloc_fifos (u32 segment_index, svm_fifo_t * rx_fifo, - svm_fifo_t * tx_fifo) +segment_manager_dealloc_fifos (svm_fifo_t * rx_fifo, svm_fifo_t * tx_fifo) { - svm_fifo_segment_private_t *fifo_segment; segment_manager_t *sm; + fifo_segment_t *fs; + u32 segment_index; + + if (!rx_fifo || !tx_fifo) + return; /* It's possible to have no segment manager if the session was removed * as result of a detach. */ if (!(sm = segment_manager_get_if_valid (rx_fifo->segment_manager))) return; - fifo_segment = segment_manager_get_segment_w_lock (sm, segment_index); - svm_fifo_segment_free_fifo (fifo_segment, rx_fifo, - FIFO_SEGMENT_RX_FREELIST); - svm_fifo_segment_free_fifo (fifo_segment, tx_fifo, - FIFO_SEGMENT_TX_FREELIST); + segment_index = rx_fifo->segment_index; + fs = segment_manager_get_segment_w_lock (sm, segment_index); + fifo_segment_free_fifo (fs, rx_fifo); + fifo_segment_free_fifo (fs, tx_fifo); /* * Try to remove svm segment if it has no fifos. This can be done only if @@ -565,56 +832,113 @@ segment_manager_dealloc_fifos (u32 segment_index, svm_fifo_t * rx_fifo, * and it is not protected. Moreover, if the segment is first and the app * has detached from the segment manager, remove the segment manager. */ - if (!svm_fifo_segment_has_fifos (fifo_segment)) + if (!fifo_segment_has_fifos (fs)) { segment_manager_segment_reader_unlock (sm); /* Remove segment if it holds no fifos or first but not protected */ if (segment_index != 0 || !sm->first_is_protected) - segment_manager_lock_and_del_segment (sm, segment_index); + sm_lock_and_del_segment_inline (sm, segment_index); /* Remove segment manager if no sessions and detached from app */ if (segment_manager_app_detached (sm) && !segment_manager_has_fifos (sm)) - segment_manager_del (sm); + segment_manager_free_safe (sm); } else segment_manager_segment_reader_unlock (sm); } +void +segment_manager_detach_fifo (segment_manager_t *sm, svm_fifo_t **f) +{ + fifo_segment_t *fs; + + fs = segment_manager_get_segment_w_lock (sm, (*f)->segment_index); + fifo_segment_detach_fifo (fs, f); + segment_manager_segment_reader_unlock (sm); +} + +void +segment_manager_attach_fifo (segment_manager_t *sm, svm_fifo_t **f, + session_t *s) +{ + fifo_segment_t *fs; + + fs = segment_manager_get_segment_w_lock (sm, (*f)->segment_index); + fifo_segment_attach_fifo (fs, f, s->thread_index); + segment_manager_segment_reader_unlock (sm); + + (*f)->shr->master_session_index = s->session_index; + (*f)->master_thread_index = s->thread_index; +} + +u32 +segment_manager_evt_q_expected_size (u32 q_len) +{ + u32 fifo_evt_size, notif_q_size, q_hdrs; + u32 msg_q_sz, fifo_evt_ring_sz, session_ntf_ring_sz; + + fifo_evt_size = 1 << max_log2 (sizeof (session_event_t)); + notif_q_size = clib_max (16, q_len >> 4); + + msg_q_sz = q_len * sizeof (svm_msg_q_msg_t); + fifo_evt_ring_sz = q_len * fifo_evt_size; + session_ntf_ring_sz = notif_q_size * 256; + q_hdrs = sizeof (svm_queue_t) + sizeof (svm_msg_q_t); + + return (msg_q_sz + fifo_evt_ring_sz + session_ntf_ring_sz + q_hdrs); +} + /** * Allocates shm queue in the first segment * * Must be called with lock held */ -svm_queue_t * -segment_manager_alloc_queue (segment_manager_t * sm, u32 queue_size) +svm_msg_q_t * +segment_manager_alloc_queue (fifo_segment_t * segment, + segment_manager_props_t * props) { - svm_fifo_segment_private_t *segment; - ssvm_shared_header_t *sh; - svm_queue_t *q; - void *oldheap; + u32 fifo_evt_size, session_evt_size = 256, notif_q_size; + svm_msg_q_cfg_t _cfg, *cfg = &_cfg; + svm_msg_q_t *q; - ASSERT (!pool_is_free_index (sm->segments, 0)); + fifo_evt_size = sizeof (session_event_t); + notif_q_size = clib_max (16, props->evt_q_size >> 4); + /* *INDENT-OFF* */ + svm_msg_q_ring_cfg_t rc[SESSION_MQ_N_RINGS] = { + {props->evt_q_size, fifo_evt_size, 0}, + {notif_q_size, session_evt_size, 0} + }; + /* *INDENT-ON* */ + cfg->consumer_pid = 0; + cfg->n_rings = 2; + cfg->q_nitems = props->evt_q_size; + cfg->ring_cfgs = rc; - segment = segment_manager_get_segment (sm, 0); - sh = segment->ssvm.sh; + q = fifo_segment_msg_q_alloc (segment, 0, cfg); - oldheap = ssvm_push_heap (sh); - q = svm_queue_init (queue_size, sizeof (session_fifo_event_t), - 0 /* consumer pid */ , - 0 /* signal when queue non-empty */ ); - ssvm_pop_heap (oldheap); + if (props->use_mq_eventfd) + { + if (svm_msg_q_alloc_eventfd (q)) + clib_warning ("failed to alloc eventfd"); + } return q; } +svm_msg_q_t * +segment_manager_event_queue (segment_manager_t * sm) +{ + return sm->event_queue; +} + /** * Frees shm queue allocated in the first segment */ void segment_manager_dealloc_queue (segment_manager_t * sm, svm_queue_t * q) { - svm_fifo_segment_private_t *segment; + fifo_segment_t *segment; ssvm_shared_header_t *sh; void *oldheap; @@ -633,29 +957,30 @@ segment_manager_dealloc_queue (segment_manager_t * sm, svm_queue_t * q) * Init segment vm address allocator */ void -segment_manager_main_init (segment_manager_main_init_args_t * a) +segment_manager_main_init (void) { - segment_manager_main_t *sm = &segment_manager_main; - clib_valloc_chunk_t _ip, *ip = &_ip; - - ip->baseva = a->baseva; - ip->size = a->size; - - clib_valloc_init (&sm->va_allocator, ip, 1 /* lock */ ); + segment_manager_main_t *sm = &sm_main; + + sm->default_fifo_size = 1 << 12; + sm->default_segment_size = 1 << 20; + sm->default_app_mq_size = 128; + sm->default_max_fifo_size = 4 << 20; + sm->default_high_watermark = 80; + sm->default_low_watermark = 50; } static clib_error_t * segment_manager_show_fn (vlib_main_t * vm, unformat_input_t * input, vlib_cli_command_t * cmd) { - segment_manager_main_t *smm = &segment_manager_main; - svm_fifo_segment_private_t *seg; - segment_manager_t *sm; + segment_manager_main_t *smm = &sm_main; u8 show_segments = 0, verbose = 0; - uword address; - u64 size; - u32 active_fifos; - u32 free_fifos; + uword max_fifo_size; + segment_manager_t *sm; + fifo_segment_t *seg; + app_worker_t *app_wrk; + application_t *app; + u8 custom_logic; while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT) { @@ -671,36 +996,38 @@ segment_manager_show_fn (vlib_main_t * vm, unformat_input_t * input, pool_elts (smm->segment_managers)); if (verbose && pool_elts (smm->segment_managers)) { - vlib_cli_output (vm, "%-10s%=15s%=12s", "Index", "App Index", - "Segments"); + vlib_cli_output (vm, "%-6s%=10s%=10s%=13s%=11s%=11s%=12s", + "Index", "AppIndex", "Segments", "MaxFifoSize", + "HighWater", "LowWater", "FifoTuning"); /* *INDENT-OFF* */ - pool_foreach (sm, smm->segment_managers, ({ - vlib_cli_output (vm, "%-10d%=15d%=12d", segment_manager_index(sm), - sm->app_index, pool_elts (sm->segments)); - })); + pool_foreach (sm, smm->segment_managers) { + app_wrk = app_worker_get_if_valid (sm->app_wrk_index); + app = app_wrk ? application_get (app_wrk->app_index) : 0; + custom_logic = (app && (app->cb_fns.fifo_tuning_callback)) ? 1 : 0; + max_fifo_size = sm->max_fifo_size; + + vlib_cli_output (vm, "%-6d%=10d%=10d%=13U%=11d%=11d%=12s", + segment_manager_index (sm), + sm->app_wrk_index, pool_elts (sm->segments), + format_memory_size, max_fifo_size, + sm->high_watermark, sm->low_watermark, + custom_logic ? "custom" : "none"); + } /* *INDENT-ON* */ + vlib_cli_output (vm, "\n"); } if (show_segments) { - vlib_cli_output (vm, "%-15s%15s%15s%15s%15s%15s", "Name", "Type", - "HeapSize (M)", "ActiveFifos", "FreeFifos", "Address"); + vlib_cli_output (vm, "%U", format_fifo_segment, 0, verbose); /* *INDENT-OFF* */ - pool_foreach (sm, smm->segment_managers, ({ + pool_foreach (sm, smm->segment_managers) { segment_manager_foreach_segment_w_lock (seg, sm, ({ - svm_fifo_segment_info (seg, &address, &size); - active_fifos = svm_fifo_segment_num_fifos (seg); - free_fifos = svm_fifo_segment_num_free_fifos (seg, ~0 /* size */); - vlib_cli_output (vm, "%-15v%15U%15llu%15u%15u%15llx", - ssvm_name (&seg->ssvm), format_svm_fifo_segment_type, - seg, size >> 20ULL, active_fifos, free_fifos, - address); - if (verbose) - vlib_cli_output (vm, "%U", format_svm_fifo_segment, seg, verbose); + vlib_cli_output (vm, "%U", format_fifo_segment, seg, verbose); })); - })); + } /* *INDENT-ON* */ } @@ -716,6 +1043,80 @@ VLIB_CLI_COMMAND (segment_manager_show_command, static) = }; /* *INDENT-ON* */ +void +segment_manager_format_sessions (segment_manager_t * sm, int verbose) +{ + vlib_main_t *vm = vlib_get_main (); + app_worker_t *app_wrk; + fifo_segment_t *fs; + const u8 *app_name; + int slice_index; + u8 *s = 0, *str; + svm_fifo_t *f; + + if (!sm) + { + if (verbose) + vlib_cli_output (vm, "%-40s%-20s%-15s%-10s", "Connection", "App", + "API Client", "SegManager"); + else + vlib_cli_output (vm, "%-40s%-20s", "Connection", "App"); + return; + } + + app_wrk = app_worker_get (sm->app_wrk_index); + app_name = application_name_from_index (app_wrk->app_index); + + clib_rwlock_reader_lock (&sm->segments_rwlock); + + /* *INDENT-OFF* */ + pool_foreach (fs, sm->segments) { + for (slice_index = 0; slice_index < fs->n_slices; slice_index++) + { + f = fifo_segment_get_slice_fifo_list (fs, slice_index); + while (f) + { + u32 session_index, thread_index; + session_t *session; + + session_index = f->shr->master_session_index; + thread_index = f->master_thread_index; + + session = session_get (session_index, thread_index); + str = format (0, "%U", format_session, session, verbose); + + if (verbose) + s = format (s, "%-40v%-20v%-15u%-10u", str, app_name, + app_wrk->api_client_index, + app_wrk->connects_seg_manager); + else + s = format (s, "%-40v%-20v", str, app_name); + + vlib_cli_output (vm, "%v", s); + vec_reset_length (s); + vec_free (str); + + f = f->next; + } + vec_free (s); + } + } + /* *INDENT-ON* */ + + clib_rwlock_reader_unlock (&sm->segments_rwlock); +} + +void +segment_manager_set_watermarks (segment_manager_t * sm, + u8 high_watermark, u8 low_watermark) +{ + ASSERT (high_watermark <= 100 && low_watermark <= 100 && + low_watermark <= high_watermark); + + sm->high_watermark = high_watermark; + sm->low_watermark = low_watermark; +} + /* * fd.io coding-style-patch-verification: ON *