}
static void
-fifo_init_for_segment (fifo_segment_header_t * fsh, svm_fifo_t * f,
- u32 size, u32 fl_index)
+fifo_init_for_segment (svm_fifo_t * f, svm_fifo_chunk_t * c)
{
- f->freelist_index = fl_index;
- f->default_chunk.start_byte = 0;
- f->default_chunk.length = size;
- f->default_chunk.next = f->start_chunk = f->end_chunk = &f->default_chunk;
+ f->start_chunk = f->end_chunk = c->next = c;
f->head_chunk = f->tail_chunk = f->ooo_enq = f->ooo_deq = f->start_chunk;
- f->next = fsh->free_fifos[fl_index];
- fsh->free_fifos[fl_index] = f;
+}
+
+static void
+fifo_init_chunk_for_segment (svm_fifo_chunk_t * c, u32 size)
+{
+ c->start_byte = 0;
+ c->length = size;
+ c->next = 0;
}
static inline int
&& size <= FIFO_SEGMENT_MAX_FIFO_SIZE;
}
-static void
-allocate_new_fifo_batch (fifo_segment_header_t * fsh,
- u32 data_size_in_bytes, int chunk_size)
+static svm_fifo_t *
+fs_try_alloc_fifo_from_freelist (fifo_segment_header_t * fsh, u32 data_bytes)
{
- u32 size, rounded_data_size;
- int i, fl_index;
- u8 *fifos_mem;
+ svm_fifo_chunk_t *c;
svm_fifo_t *f;
+ u32 fl_index;
+
+ f = fsh->free_fifos;
+ fl_index = fs_free_list_for_size (data_bytes);
+ vec_validate_init_empty (fsh->free_chunks, fl_index, 0);
+ c = fsh->free_chunks[fl_index];
+
+ if (!f || !c)
+ return 0;
+
+ fsh->free_fifos = f->next;
+ fsh->free_chunks[fl_index] = c->next;
+ c->next = c;
+ c->start_byte = 0;
+ c->length = data_bytes;
+ memset (f, 0, sizeof (*f));
+ f->start_chunk = c;
+ f->end_chunk = c;
+ return f;
+}
- rounded_data_size = (1 << (max_log2 (data_size_in_bytes)));
- fl_index = fs_free_list_for_size (data_size_in_bytes);
+static svm_fifo_t *
+fs_try_allocate_fifo_batch (ssvm_shared_header_t * sh,
+ fifo_segment_header_t * fsh, u32 data_bytes)
+{
+ u32 size, rounded_data_size;
+ svm_fifo_chunk_t *c;
+ u32 fl_index, hdrs;
+ svm_fifo_t *f;
+ void *oldheap;
+ u8 *fmem;
+ int i;
- /* Calculate space requirement $$$ round-up data_size_in_bytes */
- size = (sizeof (*f) + rounded_data_size) * chunk_size;
+ rounded_data_size = (1 << (max_log2 (data_bytes)));
+ fl_index = fs_free_list_for_size (data_bytes);
+ vec_validate_init_empty (fsh->free_chunks, fl_index, 0);
- /* Allocate fifo space. May fail. */
- fifos_mem = clib_mem_alloc_aligned_at_offset (size, CLIB_CACHE_LINE_BYTES,
- 0 /* align_offset */ ,
- 0 /* os_out_of_memory */ );
+ oldheap = ssvm_push_heap (sh);
+ hdrs = sizeof (*f) + sizeof (*c);
+ size = (hdrs + rounded_data_size) * FIFO_SEGMENT_ALLOC_BATCH_SIZE;
+ fmem = clib_mem_alloc_aligned_at_offset (size, CLIB_CACHE_LINE_BYTES,
+ 0 /* align_offset */ ,
+ 0 /* os_out_of_memory */ );
+ ssvm_pop_heap (oldheap);
/* Out of space.. */
- if (fifos_mem == 0)
- return;
+ if (fmem == 0)
+ return 0;
- /* Carve fifo space */
- for (i = 0; i < chunk_size; i++)
+ /* Carve fifo + chunk space */
+ for (i = 0; i < FIFO_SEGMENT_ALLOC_BATCH_SIZE; i++)
{
- f = (svm_fifo_t *) fifos_mem;
- fifo_init_for_segment (fsh, f, rounded_data_size, fl_index);
- fifos_mem += sizeof (*f) + rounded_data_size;
+ f = (svm_fifo_t *) fmem;
+ memset (f, 0, sizeof (*f));
+ f->next = fsh->free_fifos;
+ fsh->free_fifos = f;
+ c = (svm_fifo_chunk_t *) (fmem + sizeof (*f));
+ c->start_byte = 0;
+ c->length = rounded_data_size;
+ c->next = fsh->free_chunks[fl_index];
+ fsh->free_chunks[fl_index] = c;
+ fmem += hdrs + rounded_data_size;
}
+
+ return fs_try_alloc_fifo_from_freelist (fsh, data_bytes);
}
/**
fifo_segment_header_t *fsh;
ssvm_shared_header_t *sh;
svm_fifo_t *f = 0;
- void *oldheap;
- int fl_index;
if (!fs_chunk_size_is_valid (data_bytes))
{
return 0;
}
- fl_index = fs_free_list_for_size (data_bytes);
-
sh = fs->ssvm.sh;
ssvm_lock_non_recursive (sh, 1);
-
fsh = fs->h;
- vec_validate_init_empty (fsh->free_fifos, fl_index, 0);
- f = fsh->free_fifos[fl_index];
- /* Try to allocate batch of fifos */
- if (PREDICT_FALSE (!f))
+ /* Try the following steps in order:
+ * - grab fifo and chunk from freelists
+ * - batch fifo and chunk allocation
+ * - single fifo allocation
+ */
+ f = fs_try_alloc_fifo_from_freelist (fsh, data_bytes);
+ if (!f)
+ f = fs_try_allocate_fifo_batch (sh, fsh, data_bytes);
+ if (!f)
{
- oldheap = ssvm_push_heap (sh);
- allocate_new_fifo_batch (fsh, data_bytes,
- FIFO_SEGMENT_ALLOC_BATCH_SIZE);
+ void *oldheap = ssvm_push_heap (sh);
+ f = svm_fifo_create (data_bytes);
ssvm_pop_heap (oldheap);
- f = fsh->free_fifos[fl_index];
- }
- if (PREDICT_TRUE (f != 0))
- {
- fsh->free_fifos[fl_index] = f->next;
- /* (re)initialize the fifo, as in svm_fifo_create */
- memset (f, 0, sizeof (*f));
- svm_fifo_init (f, data_bytes);
- goto found;
+ if (!f)
+ goto done;
}
- /* Failed to allocate batch, try just one fifo. This can also fail,
- * in which case, create another segment */
- oldheap = ssvm_push_heap (sh);
- f = svm_fifo_create (data_bytes);
- ssvm_pop_heap (oldheap);
-
- if (PREDICT_FALSE (f == 0))
- goto done;
+ /* (re)initialize the fifo, as in svm_fifo_create */
+ svm_fifo_init (f, data_bytes);
- f->freelist_index = fl_index;
-
-found:
/* If rx fifo type add to active fifos list. When cleaning up segment,
* we need a list of active sessions that should be disconnected. Since
* both rx and tx fifos keep pointers to the session, it's enough to track
void
fifo_segment_free_fifo (fifo_segment_t * fs, svm_fifo_t * f)
{
+ svm_fifo_chunk_t *cur, *next;
fifo_segment_header_t *fsh;
ssvm_shared_header_t *sh;
+ void *oldheap;
int fl_index;
ASSERT (f->refcnt > 0);
sh = fs->ssvm.sh;
fsh = fs->h;
- fl_index = f->freelist_index;
-
- ASSERT (fl_index < vec_len (fsh->free_fifos));
ssvm_lock_non_recursive (sh, 2);
}
/* Add to free list */
- f->next = fsh->free_fifos[fl_index];
+ f->next = fsh->free_fifos;
f->prev = 0;
- fsh->free_fifos[fl_index] = f;
+ fsh->free_fifos = f;
- /* If fifo has more chunks, free them */
- if (f->flags & SVM_FIFO_F_MULTI_CHUNK)
+ /* Free fifo chunks */
+ cur = f->start_chunk;
+ do
{
- svm_fifo_chunk_t *cur, *next;
- void *oldheap;
-
- next = f->start_chunk->next;
- while (next != f->start_chunk)
- {
- cur = next;
- next = next->next;
- fl_index = fs_free_list_for_size (cur->length);
- cur->next = fsh->free_chunks[fl_index];
- fsh->free_chunks[fl_index] = cur;
- }
- oldheap = ssvm_push_heap (sh);
- svm_fifo_free_chunk_lookup (f);
- ssvm_pop_heap (oldheap);
+ next = cur->next;
+ fl_index = fs_free_list_for_size (cur->length);
+ ASSERT (fl_index < vec_len (fsh->free_chunks));
+ cur->next = fsh->free_chunks[fl_index];
+ fsh->free_chunks[fl_index] = cur;
+ cur = next;
}
+ while (cur != f->start_chunk);
+
+ oldheap = ssvm_push_heap (sh);
+ svm_fifo_free_chunk_lookup (f);
+ ssvm_pop_heap (oldheap);
/* not allocated on segment heap */
svm_fifo_free_ooo_data (f);
int i, rx_fl_index, tx_fl_index;
u8 *rx_fifo_mem, *tx_fifo_mem;
uword space_available;
+ svm_fifo_chunk_t *c;
void *oldheap;
svm_fifo_t *f;
+ u32 hdrs;
/* Parameter check */
if (rx_fifo_size == 0 || tx_fifo_size == 0 || *n_fifo_pairs == 0)
tx_rounded_data_size = (1 << (max_log2 (tx_fifo_size)));
tx_fl_index = fs_free_list_for_size (tx_fifo_size);
+ hdrs = sizeof (*f) + sizeof (*c);
+
/* Calculate space requirements */
- pair_size = 2 * sizeof (*f) + rx_rounded_data_size + tx_rounded_data_size;
+ pair_size = 2 * hdrs + rx_rounded_data_size + tx_rounded_data_size;
#if USE_DLMALLOC == 0
space_available = fs->ssvm.ssvm_size - mheap_bytes (sh->heap);
#else
#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;
+ rx_fifos_size = (hdrs + rx_rounded_data_size) * pairs_to_allocate;
+ tx_fifos_size = (hdrs + tx_rounded_data_size) * pairs_to_allocate;
- vec_validate_init_empty (fsh->free_fifos,
+ vec_validate_init_empty (fsh->free_chunks,
clib_max (rx_fl_index, tx_fl_index), 0);
oldheap = ssvm_push_heap (sh);
for (i = 0; i < pairs_to_allocate; i++)
{
f = (svm_fifo_t *) rx_fifo_mem;
- fifo_init_for_segment (fsh, f, rx_rounded_data_size, rx_fl_index);
- rx_fifo_mem += sizeof (*f) + rx_rounded_data_size;
+ c = (svm_fifo_chunk_t *) (rx_fifo_mem + sizeof (*f));
+ fifo_init_chunk_for_segment (c, rx_rounded_data_size);
+ fifo_init_for_segment (f, c);
+ rx_fifo_mem += hdrs + rx_rounded_data_size;
f = (svm_fifo_t *) tx_fifo_mem;
- fifo_init_for_segment (fsh, f, tx_rounded_data_size, tx_fl_index);
- tx_fifo_mem += sizeof (*f) + tx_rounded_data_size;
+ c = (svm_fifo_chunk_t *) (tx_fifo_mem + sizeof (*f));
+ fifo_init_chunk_for_segment (c, tx_rounded_data_size);
+ fifo_init_for_segment (f, c);
+ tx_fifo_mem += hdrs + tx_rounded_data_size;
}
/* Account for the pairs allocated */
else
{
fs->h->free_chunks[fl_index] = c->next;
+ c->next = 0;
}
svm_fifo_add_chunk (f, c);
u32
fifo_segment_num_free_fifos (fifo_segment_t * fs, u32 fifo_size_in_bytes)
{
- u32 count = 0, rounded_data_size, fl_index;
fifo_segment_header_t *fsh;
ssvm_shared_header_t *sh;
svm_fifo_t *f;
- int i;
+ u32 count = 0;
sh = fs->ssvm.sh;
fsh = (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)));
- fl_index = fs_free_list_for_size (rounded_data_size);
-
- if (fl_index >= vec_len (fsh->free_fifos))
- return 0;
-
- f = fsh->free_fifos[fl_index];
+ f = fsh->free_fifos;
if (f == 0)
return 0;
int verbose __attribute__ ((unused)) = va_arg (*args, int);
fifo_segment_header_t *fsh = sp->h;
u32 count, indent;
- svm_fifo_t *f;
+ svm_fifo_chunk_t *c;
int i;
indent = format_get_indent (s) + 2;
format_white_space, indent, fifo_segment_num_fifos (sp));
#endif
- for (i = 0; i < vec_len (fsh->free_fifos); i++)
+ for (i = 0; i < vec_len (fsh->free_chunks); i++)
{
- f = fsh->free_fifos[i];
- if (f == 0)
+ c = fsh->free_chunks[i];
+ if (c == 0)
continue;
count = 0;
- while (f)
+ while (c)
{
- f = f->next;
+ c = c->next;
count++;
}
Code Review / vpp.git / blobdiff