X-Git-Url: https://gerrit.fd.io/r/gitweb?a=blobdiff_plain;f=src%2Fsvm%2Fsvm_fifo_segment.c;h=4d1833eee7e6bf4727c1935bff42017509f34291;hb=b384b543313b6b47a277c903e9d4fcd4343054fa;hp=86661e516a227ca2a20f22dda6a80c160e11d87a;hpb=b88566498a83209f8646e4a6b1d247e69dae2aeb;p=vpp.git diff --git a/src/svm/svm_fifo_segment.c b/src/svm/svm_fifo_segment.c index 86661e516a2..4d1833eee7e 100644 --- a/src/svm/svm_fifo_segment.c +++ b/src/svm/svm_fifo_segment.c @@ -18,12 +18,54 @@ svm_fifo_segment_main_t svm_fifo_segment_main; static void -preallocate_fifo_pairs (svm_fifo_segment_header_t * fsh, - svm_fifo_segment_create_args_t * a) +allocate_new_fifo_chunk (svm_fifo_segment_header_t * fsh, + u32 data_size_in_bytes, int chunk_size) { - u32 rx_fifo_size, tx_fifo_size; + int freelist_index; + u32 size; + u8 *fifo_space; + u32 rounded_data_size; + svm_fifo_t *f; + int i; + + rounded_data_size = (1 << (max_log2 (data_size_in_bytes))); + freelist_index = max_log2 (rounded_data_size) + - max_log2 (FIFO_SEGMENT_MIN_FIFO_SIZE); + + /* Calculate space requirement $$$ round-up data_size_in_bytes */ + size = (sizeof (*f) + rounded_data_size) * chunk_size; + + /* Allocate fifo space. May fail. */ + fifo_space = clib_mem_alloc_aligned_at_offset + (size, CLIB_CACHE_LINE_BYTES, 0 /* align_offset */ , + 0 /* os_out_of_memory */ ); + + /* Out of space.. */ + if (fifo_space == 0) + return; + + /* Carve fifo space */ + f = (svm_fifo_t *) fifo_space; + for (i = 0; i < chunk_size; i++) + { + f->freelist_index = freelist_index; + f->next = fsh->free_fifos[freelist_index]; + fsh->free_fifos[freelist_index] = f; + fifo_space += sizeof (*f) + rounded_data_size; + f = (svm_fifo_t *) fifo_space; + } +} + +static void +preallocate_fifo_pairs (svm_fifo_segment_private_t * s, + svm_fifo_segment_create_args_t * a, u32 protect_size) +{ + svm_fifo_segment_header_t *fsh = s->h; + u32 rx_fifo_size, tx_fifo_size, pairs_to_allocate; + u32 rx_rounded_data_size, tx_rounded_data_size, pair_size; svm_fifo_t *f; u8 *rx_fifo_space, *tx_fifo_space; + int rx_freelist_index, tx_freelist_index; int i; /* Parameter check */ @@ -31,14 +73,43 @@ preallocate_fifo_pairs (svm_fifo_segment_header_t * fsh, || a->preallocated_fifo_pairs == 0) return; - /* Calculate space requirements */ - rx_fifo_size = (sizeof (*f) + a->rx_fifo_size) * a->preallocated_fifo_pairs; - tx_fifo_size = (sizeof (*f) + a->tx_fifo_size) * a->preallocated_fifo_pairs; + if (a->rx_fifo_size < FIFO_SEGMENT_MIN_FIFO_SIZE || + a->rx_fifo_size > FIFO_SEGMENT_MAX_FIFO_SIZE) + { + clib_warning ("rx fifo_size out of range %d", a->rx_fifo_size); + return; + } + + if (a->tx_fifo_size < FIFO_SEGMENT_MIN_FIFO_SIZE || + a->tx_fifo_size > FIFO_SEGMENT_MAX_FIFO_SIZE) + { + clib_warning ("tx fifo_size out of range %d", a->rx_fifo_size); + return; + } + + rx_rounded_data_size = (1 << (max_log2 (a->rx_fifo_size))); + + rx_freelist_index = max_log2 (a->rx_fifo_size) + - max_log2 (FIFO_SEGMENT_MIN_FIFO_SIZE); - 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); + tx_rounded_data_size = (1 << (max_log2 (a->rx_fifo_size))); + + tx_freelist_index = max_log2 (a->tx_fifo_size) + - max_log2 (FIFO_SEGMENT_MIN_FIFO_SIZE); + + /* Calculate space requirements */ + pair_size = 2 * sizeof (*f) + rx_rounded_data_size + tx_rounded_data_size; + if (protect_size) + protect_size += mheap_bytes (s->ssvm.sh->heap); + pairs_to_allocate = + clib_min ((s->ssvm.ssvm_size - protect_size) / pair_size, + a->preallocated_fifo_pairs); + rx_fifo_size = (sizeof (*f) + rx_rounded_data_size) * pairs_to_allocate; + tx_fifo_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); /* Allocate rx fifo space. May fail. */ rx_fifo_space = clib_mem_alloc_aligned_at_offset @@ -69,34 +140,41 @@ preallocate_fifo_pairs (svm_fifo_segment_header_t * fsh, /* 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->next = fsh->free_fifos[FIFO_SEGMENT_RX_FREELIST]; - fsh->free_fifos[FIFO_SEGMENT_RX_FREELIST] = f; - rx_fifo_space += sizeof (*f) + a->rx_fifo_size; + f->freelist_index = rx_freelist_index; + f->next = fsh->free_fifos[rx_freelist_index]; + fsh->free_fifos[rx_freelist_index] = f; + rx_fifo_space += sizeof (*f) + rx_rounded_data_size; f = (svm_fifo_t *) rx_fifo_space; } /* 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->next = fsh->free_fifos[FIFO_SEGMENT_TX_FREELIST]; - fsh->free_fifos[FIFO_SEGMENT_TX_FREELIST] = f; - tx_fifo_space += sizeof (*f) + a->tx_fifo_size; + f->freelist_index = tx_freelist_index; + f->next = fsh->free_fifos[tx_freelist_index]; + fsh->free_fifos[tx_freelist_index] = f; + tx_fifo_space += sizeof (*f) + tx_rounded_data_size; f = (svm_fifo_t *) tx_fifo_space; } + + /* Account for the pairs allocated */ + a->preallocated_fifo_pairs -= pairs_to_allocate; } -/** (master) create an svm fifo segment */ +/** + * Create an svm fifo segment and initialize as master + */ int svm_fifo_segment_create (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; + svm_fifo_segment_private_t *s; ssvm_shared_header_t *sh; svm_fifo_segment_header_t *fsh; void *oldheap; + int rv; /* Allocate a fresh segment */ pool_get (sm->segments, s); @@ -108,16 +186,14 @@ 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; + /* Note: requested_va updated due to seg base addr randomization */ + sm->next_baseva = s->ssvm.sh->ssvm_va + a->segment_size; sh = s->ssvm.sh; oldheap = ssvm_push_heap (sh); @@ -125,11 +201,8 @@ svm_fifo_segment_create (svm_fifo_segment_create_args_t * a) /* 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); + s->h = sh->opaque[0] = fsh; + preallocate_fifo_pairs (s, a, a->seg_protected_space); ssvm_pop_heap (oldheap); @@ -138,7 +211,9 @@ svm_fifo_segment_create (svm_fifo_segment_create_args_t * a) 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) { @@ -150,29 +225,23 @@ svm_fifo_segment_create_process_private (svm_fifo_segment_create_args_t * a) u8 **heaps = 0; mheap_t *heap_header; int segment_count = 1; + u32 rnd_size = 0; int i; - if (a->private_segment_count && a->private_segment_size) + if (a->private_segment_count) { - void *mem; u8 *heap; u32 pagesize = clib_mem_get_page_size (); - u32 rnd_size; + rnd_size = (a->segment_size + (pagesize - 1)) & ~pagesize; for (i = 0; i < a->private_segment_count; i++) { - rnd_size = (a->private_segment_size + (pagesize - 1)) & ~pagesize; - - mem = mmap (0, rnd_size, PROT_READ | PROT_WRITE, - MAP_PRIVATE | MAP_ANONYMOUS, - -1 /* fd */ , 0 /* offset */ ); - - if (mem == MAP_FAILED) + heap = mheap_alloc (0, rnd_size); + if (heap == 0) { - clib_unix_warning ("mmap"); + clib_unix_warning ("mheap alloc"); return -1; } - heap = mheap_alloc (mem, rnd_size); heap_header = mheap_header (heap); heap_header->flags |= MHEAP_FLAG_THREAD_SAFE; vec_add1 (heaps, heap); @@ -180,16 +249,13 @@ svm_fifo_segment_create_process_private (svm_fifo_segment_create_args_t * a) segment_count = a->private_segment_count; } - /* Spread preallocated fifo pairs across segments */ - a->preallocated_fifo_pairs /= segment_count; - /* 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.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); @@ -205,18 +271,20 @@ svm_fifo_segment_create_process_private (svm_fifo_segment_create_args_t * a) /* 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); + fsh->flags = FIFO_SEGMENT_F_IS_PRIVATE; + s->h = sh->opaque[0] = fsh; + if (!a->private_segment_count) + fsh->flags |= FIFO_SEGMENT_F_IS_MAIN_HEAP; if (a->private_segment_count) { + if (i != 0) + fsh->flags |= FIFO_SEGMENT_F_IS_PREALLOCATED; oldheap = clib_mem_get_heap (); clib_mem_set_heap (sh->heap); - preallocate_fifo_pairs (fsh, a); + preallocate_fifo_pairs (s, a, i == 0 ? a->seg_protected_space : 0); clib_mem_set_heap (oldheap); } - sh->ready = 1; vec_add1 (a->new_segment_indices, s - sm->segments); } @@ -224,15 +292,15 @@ svm_fifo_segment_create_process_private (svm_fifo_segment_create_args_t * a) 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); @@ -242,19 +310,19 @@ svm_fifo_segment_attach (svm_fifo_segment_create_args_t * a) 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); @@ -264,10 +332,26 @@ 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); + + if (s->h->flags & FIFO_SEGMENT_F_IS_PRIVATE) + { + /* Don't try to free vpp's heap! */ + if (!(s->h->flags & FIFO_SEGMENT_F_IS_MAIN_HEAP)) + mheap_free (s->ssvm.sh->heap); + clib_mem_free (s->ssvm.sh); + clib_mem_free (s->h); + } + else + { + ssvm_delete (&s->ssvm); + } + 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, @@ -277,6 +361,21 @@ svm_fifo_segment_alloc_fifo (svm_fifo_segment_private_t * s, svm_fifo_segment_header_t *fsh; svm_fifo_t *f; void *oldheap; + int freelist_index; + + /* + * 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) + { + clib_warning ("fifo size out of range %d", data_size_in_bytes); + return 0; + } + + freelist_index = max_log2 (data_size_in_bytes) + - max_log2 (FIFO_SEGMENT_MIN_FIFO_SIZE); sh = s->ssvm.sh; fsh = (svm_fifo_segment_header_t *) sh->opaque[0]; @@ -288,14 +387,24 @@ svm_fifo_segment_alloc_fifo (svm_fifo_segment_private_t * s, { case FIFO_SEGMENT_RX_FREELIST: case FIFO_SEGMENT_TX_FREELIST: - f = fsh->free_fifos[list_index]; - if (f) + vec_validate_init_empty (fsh->free_fifos, freelist_index, 0); + + f = fsh->free_fifos[freelist_index]; + if (PREDICT_FALSE (f == 0)) + { + allocate_new_fifo_chunk (fsh, data_size_in_bytes, + FIFO_SEGMENT_ALLOC_CHUNK_SIZE); + f = fsh->free_fifos[freelist_index]; + } + if (PREDICT_TRUE (f != 0)) { - fsh->free_fifos[list_index] = f->next; + fsh->free_fifos[freelist_index] = f->next; /* (re)initialize the fifo, as in svm_fifo_create */ memset (f, 0, sizeof (*f)); f->nitems = data_size_in_bytes; f->ooos_list_head = OOO_SEGMENT_INVALID_INDEX; + f->refcnt = 1; + f->freelist_index = freelist_index; goto found; } /* FALLTHROUGH */ @@ -315,6 +424,7 @@ svm_fifo_segment_alloc_fifo (svm_fifo_segment_private_t * s, ssvm_unlock_non_recursive (sh); return (0); } + f->freelist_index = freelist_index; found: /* If rx_freelist add to active fifos list. When cleaning up segment, @@ -330,6 +440,7 @@ found: } fsh->fifos = f; } + fsh->n_active_fifos++; ssvm_pop_heap (oldheap); ssvm_unlock_non_recursive (sh); @@ -343,11 +454,20 @@ svm_fifo_segment_free_fifo (svm_fifo_segment_private_t * s, svm_fifo_t * f, ssvm_shared_header_t *sh; svm_fifo_segment_header_t *fsh; void *oldheap; + int freelist_index; + + ASSERT (f->refcnt > 0); + if (--f->refcnt > 0) + return; sh = s->ssvm.sh; fsh = (svm_fifo_segment_header_t *) sh->opaque[0]; + freelist_index = f->freelist_index; + + ASSERT (freelist_index < vec_len (fsh->free_fifos)); + ssvm_lock_non_recursive (sh, 2); oldheap = ssvm_push_heap (sh); @@ -364,9 +484,9 @@ svm_fifo_segment_free_fifo (svm_fifo_segment_private_t * s, svm_fifo_t * f, /* Fall through: we add only rx fifos to active pool */ case FIFO_SEGMENT_TX_FREELIST: /* Add to free list */ - f->next = fsh->free_fifos[list_index]; + f->next = fsh->free_fifos[freelist_index]; f->prev = 0; - fsh->free_fifos[list_index] = f; + fsh->free_fifos[freelist_index] = f; break; case FIFO_SEGMENT_FREELIST_NONE: break; @@ -382,6 +502,7 @@ 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); } @@ -401,6 +522,162 @@ 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 (seg->h->flags & FIFO_SEGMENT_F_IS_PRIVATE) + { + 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 + { + *address = seg->ssvm.sh->ssvm_va; + *size = seg->ssvm.ssvm_size; + } +} + +mheap_t * +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 ((sp->h->flags & FIFO_SEGMENT_F_IS_PRIVATE) + && !(sp->h->flags & FIFO_SEGMENT_F_IS_MAIN_HEAP)) + s = format (s, "%s", "private-heap"); + else if ((sp->h->flags & FIFO_SEGMENT_F_IS_PRIVATE) + && (sp->h->flags & FIFO_SEGMENT_F_IS_MAIN_HEAP)) + s = format (s, "%s", "main-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 = 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; + 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)); + + 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 *