X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fsvm%2Fsvm_fifo_segment.c;h=a42225c8345876a174b561f04e70d9e44bf7eabc;hb=b7b929931a07fbb27b43d5cd105f366c3e29807e;hp=2094ba74a9f68b51a8bb687f9658e17314ba5cdb;hpb=818eb54de01459ed3d823f8a9781bbed0845db82;p=vpp.git diff --git a/src/svm/svm_fifo_segment.c b/src/svm/svm_fifo_segment.c index 2094ba74a9f..a42225c8345 100644 --- a/src/svm/svm_fifo_segment.c +++ b/src/svm/svm_fifo_segment.c @@ -56,68 +56,80 @@ allocate_new_fifo_chunk (svm_fifo_segment_header_t * fsh, } } -static void -preallocate_fifo_pairs (svm_fifo_segment_header_t * fsh, - svm_fifo_segment_create_args_t * a) +/** + * Pre-allocates fifo pairs in fifo segment + * + * The number of fifos pre-allocated is the minimum of the requested number + * of pairs and the maximum number that fit within the segment. If the maximum + * is hit, the number of fifo pairs requested is updated by subtracting the + * number of fifos that have been successfully allocated. + */ +void +svm_fifo_segment_preallocate_fifo_pairs (svm_fifo_segment_private_t * s, + u32 rx_fifo_size, u32 tx_fifo_size, + u32 * n_fifo_pairs) { - u32 rx_fifo_size, tx_fifo_size; - u32 rx_rounded_data_size, tx_rounded_data_size; - svm_fifo_t *f; - u8 *rx_fifo_space, *tx_fifo_space; + u32 rx_rounded_data_size, tx_rounded_data_size, pair_size; + u32 rx_fifos_size, tx_fifos_size, pairs_to_allocate; int rx_freelist_index, tx_freelist_index; + ssvm_shared_header_t *sh = s->ssvm.sh; + svm_fifo_segment_header_t *fsh = s->h; + u8 *rx_fifo_space, *tx_fifo_space; + uword space_available; + void *oldheap; + svm_fifo_t *f; int i; /* Parameter check */ - if (a->rx_fifo_size == 0 || a->tx_fifo_size == 0 - || a->preallocated_fifo_pairs == 0) + if (rx_fifo_size == 0 || tx_fifo_size == 0 || *n_fifo_pairs == 0) return; - if (a->rx_fifo_size < FIFO_SEGMENT_MIN_FIFO_SIZE || - a->rx_fifo_size > FIFO_SEGMENT_MAX_FIFO_SIZE) + if (rx_fifo_size < FIFO_SEGMENT_MIN_FIFO_SIZE || + rx_fifo_size > FIFO_SEGMENT_MAX_FIFO_SIZE) { - clib_warning ("rx fifo_size out of range %d", a->rx_fifo_size); + clib_warning ("rx fifo_size out of range %d", rx_fifo_size); return; } - if (a->tx_fifo_size < FIFO_SEGMENT_MIN_FIFO_SIZE || - a->tx_fifo_size > FIFO_SEGMENT_MAX_FIFO_SIZE) + if (tx_fifo_size < FIFO_SEGMENT_MIN_FIFO_SIZE || + tx_fifo_size > FIFO_SEGMENT_MAX_FIFO_SIZE) { - clib_warning ("tx fifo_size out of range %d", a->rx_fifo_size); + clib_warning ("tx fifo_size out of range %d", rx_fifo_size); return; } - rx_rounded_data_size = (1 << (max_log2 (a->rx_fifo_size))); - - rx_freelist_index = max_log2 (a->rx_fifo_size) + rx_rounded_data_size = (1 << (max_log2 (rx_fifo_size))); + rx_freelist_index = max_log2 (rx_fifo_size) - max_log2 (FIFO_SEGMENT_MIN_FIFO_SIZE); - - tx_rounded_data_size = (1 << (max_log2 (a->rx_fifo_size))); - - tx_freelist_index = max_log2 (a->tx_fifo_size) + tx_rounded_data_size = (1 << (max_log2 (tx_fifo_size))); + tx_freelist_index = max_log2 (tx_fifo_size) - max_log2 (FIFO_SEGMENT_MIN_FIFO_SIZE); /* Calculate space requirements */ - rx_fifo_size = (sizeof (*f) + rx_rounded_data_size) - * a->preallocated_fifo_pairs; - tx_fifo_size = (sizeof (*f) + tx_rounded_data_size) - * a->preallocated_fifo_pairs; + pair_size = 2 * sizeof (*f) + rx_rounded_data_size + tx_rounded_data_size; +#if USE_DLMALLOC == 0 + space_available = s->ssvm.ssvm_size - mheap_bytes (sh->heap); +#else + space_available = s->ssvm.ssvm_size - mspace_usable_size (sh->heap); +#endif + + pairs_to_allocate = clib_min (space_available / pair_size, *n_fifo_pairs); + rx_fifos_size = (sizeof (*f) + rx_rounded_data_size) * pairs_to_allocate; + tx_fifos_size = (sizeof (*f) + tx_rounded_data_size) * pairs_to_allocate; vec_validate_init_empty (fsh->free_fifos, clib_max (rx_freelist_index, tx_freelist_index), 0); - if (0) - clib_warning ("rx_fifo_size %u (%d mb), tx_fifo_size %u (%d mb)", - rx_fifo_size, rx_fifo_size >> 20, - tx_fifo_size, tx_fifo_size >> 20); + oldheap = ssvm_push_heap (sh); /* Allocate rx fifo space. May fail. */ rx_fifo_space = clib_mem_alloc_aligned_at_offset - (rx_fifo_size, CLIB_CACHE_LINE_BYTES, 0 /* align_offset */ , + (rx_fifos_size, CLIB_CACHE_LINE_BYTES, 0 /* align_offset */ , 0 /* os_out_of_memory */ ); /* Same for TX */ tx_fifo_space = clib_mem_alloc_aligned_at_offset - (tx_fifo_size, CLIB_CACHE_LINE_BYTES, 0 /* align_offset */ , + (tx_fifos_size, CLIB_CACHE_LINE_BYTES, 0 /* align_offset */ , 0 /* os_out_of_memory */ ); /* Make sure it worked. Clean up if it didn't... */ @@ -127,19 +139,20 @@ preallocate_fifo_pairs (svm_fifo_segment_header_t * fsh, clib_mem_free (rx_fifo_space); else clib_warning ("rx fifo preallocation failure: size %d npairs %d", - a->rx_fifo_size, a->preallocated_fifo_pairs); + rx_fifo_size, *n_fifo_pairs); if (tx_fifo_space) clib_mem_free (tx_fifo_space); else clib_warning ("tx fifo preallocation failure: size %d nfifos %d", - a->tx_fifo_size, a->preallocated_fifo_pairs); + tx_fifo_size, *n_fifo_pairs); + ssvm_pop_heap (oldheap); return; } /* Carve rx fifo space */ f = (svm_fifo_t *) rx_fifo_space; - for (i = 0; i < a->preallocated_fifo_pairs; i++) + for (i = 0; i < pairs_to_allocate; i++) { f->freelist_index = rx_freelist_index; f->next = fsh->free_fifos[rx_freelist_index]; @@ -149,7 +162,7 @@ preallocate_fifo_pairs (svm_fifo_segment_header_t * fsh, } /* Carve tx fifo space */ f = (svm_fifo_t *) tx_fifo_space; - for (i = 0; i < a->preallocated_fifo_pairs; i++) + for (i = 0; i < pairs_to_allocate; i++) { f->freelist_index = tx_freelist_index; f->next = fsh->free_fifos[tx_freelist_index]; @@ -157,22 +170,48 @@ preallocate_fifo_pairs (svm_fifo_segment_header_t * fsh, tx_fifo_space += sizeof (*f) + tx_rounded_data_size; f = (svm_fifo_t *) tx_fifo_space; } + + /* Account for the pairs allocated */ + *n_fifo_pairs -= pairs_to_allocate; + ssvm_pop_heap (oldheap); } -/** (master) create an svm fifo segment */ +/** + * Initialize svm fifo segment shared header + */ int -svm_fifo_segment_create (svm_fifo_segment_create_args_t * a) +svm_fifo_segment_init (svm_fifo_segment_private_t * s) { - int rv; - svm_fifo_segment_private_t *s; - svm_fifo_segment_main_t *sm = &svm_fifo_segment_main; - ssvm_shared_header_t *sh; svm_fifo_segment_header_t *fsh; + ssvm_shared_header_t *sh; void *oldheap; + sh = s->ssvm.sh; + oldheap = ssvm_push_heap (sh); + + fsh = clib_mem_alloc (sizeof (*fsh)); + clib_memset (fsh, 0, sizeof (*fsh)); + s->h = sh->opaque[0] = fsh; + + ssvm_pop_heap (oldheap); + + sh->ready = 1; + return (0); +} + +/** + * Create an svm fifo segment and initialize as master + */ +int +svm_fifo_segment_create (svm_fifo_segment_create_args_t * a) +{ + svm_fifo_segment_main_t *sm = &svm_fifo_segment_main; + svm_fifo_segment_private_t *s; + int rv; + /* Allocate a fresh segment */ pool_get (sm->segments, s); - memset (s, 0, sizeof (*s)); + clib_memset (s, 0, sizeof (*s)); s->ssvm.ssvm_size = a->segment_size; s->ssvm.i_am_master = 1; @@ -180,153 +219,105 @@ svm_fifo_segment_create (svm_fifo_segment_create_args_t * a) s->ssvm.name = format (0, "%s%c", a->segment_name, 0); s->ssvm.requested_va = sm->next_baseva; - rv = ssvm_master_init (&s->ssvm, s - sm->segments); - - if (rv) + if ((rv = ssvm_master_init (&s->ssvm, a->segment_type))) { - _vec_len (s) = vec_len (s) - 1; + pool_put (sm->segments, s); return (rv); } - /* Note; requested_va updated due to seg base addr randomization */ - sm->next_baseva = s->ssvm.requested_va + a->segment_size; - - sh = s->ssvm.sh; - oldheap = ssvm_push_heap (sh); - - /* Set up svm_fifo_segment shared header */ - fsh = clib_mem_alloc (sizeof (*fsh)); - memset (fsh, 0, sizeof (*fsh)); - sh->opaque[0] = fsh; - s->h = fsh; - fsh->segment_name = format (0, "%s%c", a->segment_name, 0); - - preallocate_fifo_pairs (fsh, a); - - ssvm_pop_heap (oldheap); + /* Note: requested_va updated due to seg base addr randomization */ + sm->next_baseva = s->ssvm.sh->ssvm_va + a->segment_size; - sh->ready = 1; + svm_fifo_segment_init (s); vec_add1 (a->new_segment_indices, s - sm->segments); return (0); } -/** Create an svm fifo segment in process-private memory */ +/** + * Create an svm fifo segment in process-private memory + */ int svm_fifo_segment_create_process_private (svm_fifo_segment_create_args_t * a) { - svm_fifo_segment_private_t *s; svm_fifo_segment_main_t *sm = &svm_fifo_segment_main; + svm_fifo_segment_private_t *s; ssvm_shared_header_t *sh; - svm_fifo_segment_header_t *fsh; - void *oldheap; - u8 **heaps = 0; - mheap_t *heap_header; - int segment_count = 1; - int i; + u32 rnd_size = 0; + u8 *heap; + u32 pagesize = clib_mem_get_page_size (); - if (a->private_segment_count && a->private_segment_size) - { - void *mem; - u8 *heap; - u32 pagesize = clib_mem_get_page_size (); - u32 rnd_size; - - for (i = 0; i < a->private_segment_count; i++) - { - rnd_size = (a->private_segment_size + (pagesize - 1)) & ~pagesize; + pool_get (sm->segments, s); + clib_memset (s, 0, sizeof (*s)); - mem = mmap (0, rnd_size, PROT_READ | PROT_WRITE, - MAP_PRIVATE | MAP_ANONYMOUS, - -1 /* fd */ , 0 /* offset */ ); + rnd_size = (a->segment_size + (pagesize - 1)) & ~pagesize; - if (mem == MAP_FAILED) - { - clib_unix_warning ("mmap"); - return -1; - } - heap = mheap_alloc (mem, rnd_size); - heap_header = mheap_header (heap); - heap_header->flags |= MHEAP_FLAG_THREAD_SAFE; - vec_add1 (heaps, heap); - } - segment_count = a->private_segment_count; +#if USE_DLMALLOC == 0 + heap = mheap_alloc (0, rnd_size); + if (heap == 0) + { + clib_unix_warning ("mheap alloc"); + pool_put (sm->segments, s); + return -1; } + { + mheap_t *heap_header; + heap_header = mheap_header (heap); + heap_header->flags |= MHEAP_FLAG_THREAD_SAFE; + } +#else + heap = create_mspace (rnd_size, 1 /* locked */ ); +#endif + + s->ssvm.ssvm_size = rnd_size; + s->ssvm.i_am_master = 1; + s->ssvm.my_pid = getpid (); + s->ssvm.name = format (0, "%s%c", a->segment_name, 0); + s->ssvm.requested_va = ~0; - /* Spread preallocated fifo pairs across segments */ - a->preallocated_fifo_pairs /= segment_count; + /* Allocate a [sic] shared memory header, in process memory... */ + sh = clib_mem_alloc_aligned (sizeof (*sh), CLIB_CACHE_LINE_BYTES); + s->ssvm.sh = sh; - /* Allocate segments */ - for (i = 0; i < segment_count; i++) - { - pool_get (sm->segments, s); - memset (s, 0, sizeof (*s)); - - s->ssvm.ssvm_size = ~0; - s->ssvm.i_am_master = 1; - s->ssvm.my_pid = getpid (); - s->ssvm.name = format (0, "%s%c", a->segment_name, 0); - s->ssvm.requested_va = ~0; - - /* Allocate a [sic] shared memory header, in process memory... */ - sh = clib_mem_alloc_aligned (sizeof (*sh), CLIB_CACHE_LINE_BYTES); - s->ssvm.sh = sh; - - memset (sh, 0, sizeof (*sh)); - sh->heap = a->private_segment_count ? heaps[i] : clib_mem_get_heap (); - - /* Set up svm_fifo_segment shared header */ - fsh = clib_mem_alloc (sizeof (*fsh)); - memset (fsh, 0, sizeof (*fsh)); - sh->opaque[0] = fsh; - s->h = fsh; - fsh->segment_name = format (0, "%s%c", a->segment_name, 0); - - if (a->private_segment_count) - { - oldheap = clib_mem_get_heap (); - clib_mem_set_heap (sh->heap); - preallocate_fifo_pairs (fsh, a); - clib_mem_set_heap (oldheap); - } + clib_memset (sh, 0, sizeof (*sh)); + sh->heap = heap; + + svm_fifo_segment_init (s); + vec_add1 (a->new_segment_indices, s - sm->segments); - sh->ready = 1; - vec_add1 (a->new_segment_indices, s - sm->segments); - } - vec_free (heaps); return (0); } -/** (slave) attach to an svm fifo segment */ +/** + * Attach as slave to an svm fifo segment + */ int svm_fifo_segment_attach (svm_fifo_segment_create_args_t * a) { - int rv; - svm_fifo_segment_private_t *s; svm_fifo_segment_main_t *sm = &svm_fifo_segment_main; - ssvm_shared_header_t *sh; - svm_fifo_segment_header_t *fsh; + svm_fifo_segment_private_t *s; + int rv; /* Allocate a fresh segment */ pool_get (sm->segments, s); - memset (s, 0, sizeof (*s)); + clib_memset (s, 0, sizeof (*s)); s->ssvm.ssvm_size = a->segment_size; s->ssvm.my_pid = getpid (); s->ssvm.name = format (0, "%s%c", a->segment_name, 0); s->ssvm.requested_va = sm->next_baseva; + if (a->segment_type == SSVM_SEGMENT_MEMFD) + s->ssvm.fd = a->memfd_fd; + else + s->ssvm.attach_timeout = sm->timeout_in_seconds; - rv = ssvm_slave_init (&s->ssvm, sm->timeout_in_seconds); - - if (rv) + if ((rv = ssvm_slave_init (&s->ssvm, a->segment_type))) { _vec_len (s) = vec_len (s) - 1; return (rv); } /* Fish the segment header */ - sh = s->ssvm.sh; - fsh = (svm_fifo_segment_header_t *) sh->opaque[0]; - s->h = fsh; + s->h = s->ssvm.sh->opaque[0]; vec_add1 (a->new_segment_indices, s - sm->segments); return (0); @@ -336,10 +327,15 @@ void svm_fifo_segment_delete (svm_fifo_segment_private_t * s) { svm_fifo_segment_main_t *sm = &svm_fifo_segment_main; + ssvm_delete (&s->ssvm); + clib_memset (s, 0xfe, sizeof (*s)); pool_put (sm->segments, s); } +/** + * Allocate fifo in svm segment + */ svm_fifo_t * svm_fifo_segment_alloc_fifo (svm_fifo_segment_private_t * s, u32 data_size_in_bytes, @@ -347,13 +343,13 @@ svm_fifo_segment_alloc_fifo (svm_fifo_segment_private_t * s, { ssvm_shared_header_t *sh; svm_fifo_segment_header_t *fsh; - svm_fifo_t *f; + svm_fifo_t *f = 0; void *oldheap; int freelist_index; /* - * 2K minimum. It's not likely that anything good will happen - * with a 1K FIFO. + * 4K minimum. It's not likely that anything good will happen + * with a smaller FIFO. */ if (data_size_in_bytes < FIFO_SEGMENT_MIN_FIFO_SIZE || data_size_in_bytes > FIFO_SEGMENT_MAX_FIFO_SIZE) @@ -366,36 +362,40 @@ svm_fifo_segment_alloc_fifo (svm_fifo_segment_private_t * s, - max_log2 (FIFO_SEGMENT_MIN_FIFO_SIZE); sh = s->ssvm.sh; - fsh = (svm_fifo_segment_header_t *) sh->opaque[0]; - ssvm_lock_non_recursive (sh, 1); - oldheap = ssvm_push_heap (sh); + fsh = (svm_fifo_segment_header_t *) sh->opaque[0]; switch (list_index) { case FIFO_SEGMENT_RX_FREELIST: case FIFO_SEGMENT_TX_FREELIST: vec_validate_init_empty (fsh->free_fifos, freelist_index, 0); - f = fsh->free_fifos[freelist_index]; - if (PREDICT_FALSE (f == 0)) + if (PREDICT_FALSE (!f)) { + /* Preallocated and no fifo left. Don't even try */ + if (fsh->flags & FIFO_SEGMENT_F_IS_PREALLOCATED) + goto done; + + oldheap = ssvm_push_heap (sh); allocate_new_fifo_chunk (fsh, data_size_in_bytes, FIFO_SEGMENT_ALLOC_CHUNK_SIZE); + ssvm_pop_heap (oldheap); f = fsh->free_fifos[freelist_index]; } if (PREDICT_TRUE (f != 0)) { fsh->free_fifos[freelist_index] = f->next; /* (re)initialize the fifo, as in svm_fifo_create */ - memset (f, 0, sizeof (*f)); + clib_memset (f, 0, sizeof (*f)); f->nitems = data_size_in_bytes; f->ooos_list_head = OOO_SEGMENT_INVALID_INDEX; + f->ct_session_index = SVM_FIFO_INVALID_SESSION_INDEX; f->refcnt = 1; f->freelist_index = freelist_index; goto found; } - /* FALLTHROUGH */ + break; case FIFO_SEGMENT_FREELIST_NONE: break; @@ -404,14 +404,13 @@ svm_fifo_segment_alloc_fifo (svm_fifo_segment_private_t * s, break; } - /* Note: this can fail, in which case: create another segment */ + /* Catch all that allocates just one fifo. Note: this can fail, + * in which case: create another segment */ + oldheap = ssvm_push_heap (sh); f = svm_fifo_create (data_size_in_bytes); + ssvm_pop_heap (oldheap); if (PREDICT_FALSE (f == 0)) - { - ssvm_pop_heap (oldheap); - ssvm_unlock_non_recursive (sh); - return (0); - } + goto done; f->freelist_index = freelist_index; found: @@ -428,8 +427,9 @@ found: } fsh->fifos = f; } + fsh->n_active_fifos++; - ssvm_pop_heap (oldheap); +done: ssvm_unlock_non_recursive (sh); return (f); } @@ -453,7 +453,7 @@ svm_fifo_segment_free_fifo (svm_fifo_segment_private_t * s, svm_fifo_t * f, freelist_index = f->freelist_index; - ASSERT (freelist_index > 0 && freelist_index < vec_len (fsh->free_fifos)); + ASSERT (freelist_index < vec_len (fsh->free_fifos)); ssvm_lock_non_recursive (sh, 2); oldheap = ssvm_push_heap (sh); @@ -489,12 +489,13 @@ svm_fifo_segment_free_fifo (svm_fifo_segment_private_t * s, svm_fifo_t * f, f->master_thread_index = ~0; } + fsh->n_active_fifos--; ssvm_pop_heap (oldheap); ssvm_unlock_non_recursive (sh); } void -svm_fifo_segment_init (u64 baseva, u32 timeout_in_seconds) +svm_fifo_segment_main_init (u64 baseva, u32 timeout_in_seconds) { svm_fifo_segment_main_t *sm = &svm_fifo_segment_main; @@ -508,6 +509,166 @@ svm_fifo_segment_index (svm_fifo_segment_private_t * s) return s - svm_fifo_segment_main.segments; } +/** + * Retrieve svm segments pool. Used only for debug purposes. + */ +svm_fifo_segment_private_t * +svm_fifo_segment_segments_pool (void) +{ + svm_fifo_segment_main_t *sm = &svm_fifo_segment_main; + return sm->segments; +} + +/** + * Get number of active fifos + */ +u32 +svm_fifo_segment_num_fifos (svm_fifo_segment_private_t * fifo_segment) +{ + return fifo_segment->h->n_active_fifos; +} + +u32 +svm_fifo_segment_num_free_fifos (svm_fifo_segment_private_t * fifo_segment, + u32 fifo_size_in_bytes) +{ + ssvm_shared_header_t *sh; + svm_fifo_segment_header_t *fsh; + svm_fifo_t *f; + int i; + u32 count = 0, rounded_data_size, freelist_index; + + sh = fifo_segment->ssvm.sh; + fsh = (svm_fifo_segment_header_t *) sh->opaque[0]; + + /* Count all free fifos? */ + if (fifo_size_in_bytes == ~0) + { + for (i = 0; i < vec_len (fsh->free_fifos); i++) + { + f = fsh->free_fifos[i]; + if (f == 0) + continue; + + while (f) + { + f = f->next; + count++; + } + } + return count; + } + + rounded_data_size = (1 << (max_log2 (fifo_size_in_bytes))); + freelist_index = max_log2 (rounded_data_size) + - max_log2 (FIFO_SEGMENT_MIN_FIFO_SIZE); + + if (freelist_index >= vec_len (fsh->free_fifos)) + return 0; + + f = fsh->free_fifos[freelist_index]; + if (f == 0) + return 0; + + while (f) + { + f = f->next; + count++; + } + return count; +} + +void +svm_fifo_segment_info (svm_fifo_segment_private_t * seg, uword * address, + u64 * size) +{ + if (ssvm_type (&seg->ssvm) == SSVM_SEGMENT_PRIVATE) + { +#if USE_DLMALLOC == 0 + mheap_t *heap_header; + + *address = pointer_to_uword (seg->ssvm.sh->heap); + heap_header = mheap_header (seg->ssvm.sh->heap); + *size = heap_header->max_size; +#else + mspace_get_address_and_size (seg->ssvm.sh->heap, + (unsigned long long *) address, + (unsigned long long *) size); +#endif + } + else + { + *address = seg->ssvm.sh->ssvm_va; + *size = seg->ssvm.ssvm_size; + } +} + +void * +svm_fifo_segment_heap (svm_fifo_segment_private_t * seg) +{ + return seg->ssvm.sh->heap; +} + +u8 * +format_svm_fifo_segment_type (u8 * s, va_list * args) +{ + svm_fifo_segment_private_t *sp; + sp = va_arg (*args, svm_fifo_segment_private_t *); + ssvm_segment_type_t st = ssvm_type (&sp->ssvm); + + if (st == SSVM_SEGMENT_PRIVATE) + s = format (s, "%s", "private-heap"); + else if (st == SSVM_SEGMENT_MEMFD) + s = format (s, "%s", "memfd"); + else if (st == SSVM_SEGMENT_SHM) + s = format (s, "%s", "shm"); + else + s = format (s, "%s", "unknown"); + return s; +} + +/** + * Segment format function + */ +u8 * +format_svm_fifo_segment (u8 * s, va_list * args) +{ + svm_fifo_segment_private_t *sp + = va_arg (*args, svm_fifo_segment_private_t *); + int verbose __attribute__ ((unused)) = va_arg (*args, int); + svm_fifo_segment_header_t *fsh = sp->h; + u32 count, indent; + svm_fifo_t *f; + int i; + + indent = format_get_indent (s) + 2; +#if USE_DLMALLOC == 0 + s = format (s, "%U segment heap: %U\n", format_white_space, indent, + format_mheap, svm_fifo_segment_heap (sp), verbose); + s = format (s, "%U segment has %u active fifos\n", + format_white_space, indent, svm_fifo_segment_num_fifos (sp)); +#endif + + for (i = 0; i < vec_len (fsh->free_fifos); i++) + { + f = fsh->free_fifos[i]; + if (f == 0) + continue; + count = 0; + while (f) + { + f = f->next; + count++; + } + + s = format (s, "%U%-5u Kb: %u free", + format_white_space, indent + 2, + 1 << (i + max_log2 (FIFO_SEGMENT_MIN_FIFO_SIZE) - 10), + count); + } + return s; +} + /* * fd.io coding-style-patch-verification: ON *