#include <svm/fifo_segment.h>
+/**
+ * Fifo segment free space
+ *
+ * Queries the underlying memory manager, dlmalloc, for free space. Since this
+ * ends up walking the internal data structures, it should not be called
+ * indiscriminately.
+ *
+ * @param fs fifo segment
+ * @return number of free bytes
+ */
+static u32
+fs_free_space (fifo_segment_t * fs)
+{
+ struct dlmallinfo dlminfo;
+
+ dlminfo = mspace_mallinfo (fs->ssvm.sh->heap);
+ return dlminfo.fordblks;
+}
+
/**
* Initialize fifo segment shared header
*/
ssvm_pop_heap (oldheap);
+ fsh->n_free_bytes = fs_free_space (fs);
sh->ready = 1;
return (0);
}
-/**
- * Create a fifo segment in process-private memory
- */
-static int
-fifo_segment_create_process_private (fifo_segment_main_t * sm,
- fifo_segment_create_args_t * a)
-{
- u32 pagesize = clib_mem_get_page_size ();
- ssvm_shared_header_t *sh;
- fifo_segment_t *s;
- u32 rnd_size = 0;
- u8 *heap;
-
- pool_get (sm->segments, s);
- clib_memset (s, 0, sizeof (*s));
-
- rnd_size = (a->segment_size + (pagesize - 1)) & ~pagesize;
-
-#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;
-
- /* Allocate a [sic] shared memory header, in process memory... */
- sh = clib_mem_alloc_aligned (sizeof (*sh), CLIB_CACHE_LINE_BYTES);
- s->ssvm.sh = sh;
-
- clib_memset (sh, 0, sizeof (*sh));
- sh->heap = heap;
-
- fifo_segment_init (s);
- vec_add1 (a->new_segment_indices, s - sm->segments);
-
- return (0);
-}
-
/**
* Create a fifo segment and initialize as master
*/
int
fifo_segment_create (fifo_segment_main_t * sm, fifo_segment_create_args_t * a)
{
- fifo_segment_t *s;
+ fifo_segment_t *fs;
+ uword baseva;
int rv;
- if (a->segment_type == SSVM_SEGMENT_PRIVATE)
- return fifo_segment_create_process_private (sm, a);
-
/* Allocate a fresh segment */
- pool_get (sm->segments, s);
- clib_memset (s, 0, sizeof (*s));
+ pool_get_zero (sm->segments, fs);
- s->ssvm.ssvm_size = a->segment_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 = sm->next_baseva;
+ baseva = a->segment_type == SSVM_SEGMENT_PRIVATE ? ~0ULL : sm->next_baseva;
+ fs->ssvm.ssvm_size = a->segment_size;
+ fs->ssvm.i_am_master = 1;
+ fs->ssvm.my_pid = getpid ();
+ fs->ssvm.name = format (0, "%s%c", a->segment_name, 0);
+ fs->ssvm.requested_va = baseva;
- if ((rv = ssvm_master_init (&s->ssvm, a->segment_type)))
+ if ((rv = ssvm_master_init (&fs->ssvm, a->segment_type)))
{
- pool_put (sm->segments, s);
+ pool_put (sm->segments, fs);
return (rv);
}
/* Note: requested_va updated due to seg base addr randomization */
- sm->next_baseva = s->ssvm.sh->ssvm_va + a->segment_size;
+ sm->next_baseva = fs->ssvm.sh->ssvm_va + fs->ssvm.ssvm_size;
- fifo_segment_init (s);
- vec_add1 (a->new_segment_indices, s - sm->segments);
+ fifo_segment_init (fs);
+ vec_add1 (a->new_segment_indices, fs - sm->segments);
return (0);
}
sm->timeout_in_seconds = timeout_in_seconds;
}
-static void
-fifo_init_for_segment (svm_fifo_t * f, svm_fifo_chunk_t * c)
-{
- f->start_chunk = f->end_chunk = c->next = c;
- f->head_chunk = f->tail_chunk = f->ooo_enq = f->ooo_deq = f->start_chunk;
-}
-
-static void
-fifo_init_chunk_for_segment (svm_fifo_chunk_t * c, u32 size)
+static inline u32
+fs_freelist_for_size (u32 size)
{
- c->start_byte = 0;
- c->length = size;
- c->next = 0;
+ return max_log2 (size) - max_log2 (FIFO_SEGMENT_MIN_FIFO_SIZE);
}
-static inline int
-fs_free_list_for_size (u32 size)
+static inline u32
+fs_freelist_index_to_size (u32 fl_index)
{
- return max_log2 (size) - max_log2 (FIFO_SEGMENT_MIN_FIFO_SIZE);
+ return 1 << (fl_index + max_log2 (FIFO_SEGMENT_MIN_FIFO_SIZE));
}
static inline int
}
static svm_fifo_t *
-fs_try_alloc_fifo_from_freelist (fifo_segment_header_t * fsh, u32 data_bytes)
+fs_try_alloc_fifo_freelist (fifo_segment_t * fs, u32 fl_index, u32 data_bytes)
{
+ fifo_segment_header_t *fsh = fs->h;
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)
memset (f, 0, sizeof (*f));
f->start_chunk = c;
f->end_chunk = c;
+
+ fsh->n_fl_chunk_bytes -= fs_freelist_index_to_size (fl_index);
return f;
}
static svm_fifo_t *
-fs_try_allocate_fifo_batch (ssvm_shared_header_t * sh,
- fifo_segment_header_t * fsh, u32 data_bytes)
+fs_try_alloc_fifo_freelist_multi_chunk (fifo_segment_t * fs, u32 data_bytes)
{
- u32 size, rounded_data_size;
+ svm_fifo_chunk_t *c, *first = 0, *last = 0;
+ fifo_segment_header_t *fsh = fs->h;
+ u32 fl_index, fl_size, n_alloc = 0;
+ svm_fifo_t *f;
+
+ f = fsh->free_fifos;
+ if (!f)
+ {
+ void *oldheap = ssvm_push_heap (fs->ssvm.sh);
+ f = clib_mem_alloc_aligned (sizeof (*f), CLIB_CACHE_LINE_BYTES);
+ ssvm_pop_heap (oldheap);
+ if (!f)
+ return 0;
+ memset (f, 0, sizeof (*f));
+ }
+
+ fl_index = fs_freelist_for_size (data_bytes) - 1;
+ vec_validate_init_empty (fsh->free_chunks, fl_index, 0);
+ fl_size = fs_freelist_index_to_size (fl_index);
+
+ while (data_bytes)
+ {
+ c = fsh->free_chunks[fl_index];
+ if (c)
+ {
+ fsh->free_chunks[fl_index] = c->next;
+ if (!last)
+ last = c;
+ c->next = first;
+ first = c;
+ n_alloc += c->length;
+ c->length = clib_min (fl_size, data_bytes);
+ data_bytes -= c->length;
+ }
+ else
+ {
+ ASSERT (fl_index > 0);
+ fl_index -= 1;
+ fl_size = fl_size >> 1;
+ }
+ }
+ f->start_chunk = first;
+ f->end_chunk = last;
+ last->next = first;
+ fsh->n_fl_chunk_bytes -= n_alloc;
+ return f;
+}
+
+static int
+fs_try_alloc_fifo_batch (fifo_segment_t * fs, u32 fl_index, u32 batch_size)
+{
+ fifo_segment_header_t *fsh = fs->h;
+ u32 size, hdrs, rounded_data_size;
svm_fifo_chunk_t *c;
- u32 fl_index, hdrs;
svm_fifo_t *f;
void *oldheap;
u8 *fmem;
int i;
- 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);
-
- oldheap = ssvm_push_heap (sh);
+ rounded_data_size = fs_freelist_index_to_size (fl_index);
hdrs = sizeof (*f) + sizeof (*c);
- size = (hdrs + rounded_data_size) * FIFO_SEGMENT_ALLOC_BATCH_SIZE;
+ size = (hdrs + rounded_data_size) * batch_size;
+
+ oldheap = ssvm_push_heap (fs->ssvm.sh);
fmem = clib_mem_alloc_aligned_at_offset (size, CLIB_CACHE_LINE_BYTES,
0 /* align_offset */ ,
0 /* os_out_of_memory */ );
/* Out of space.. */
if (fmem == 0)
- return 0;
+ return -1;
/* Carve fifo + chunk space */
- for (i = 0; i < FIFO_SEGMENT_ALLOC_BATCH_SIZE; i++)
+ for (i = 0; i < batch_size; i++)
{
f = (svm_fifo_t *) fmem;
memset (f, 0, sizeof (*f));
fmem += hdrs + rounded_data_size;
}
- return fs_try_alloc_fifo_from_freelist (fsh, data_bytes);
+ fsh->n_fl_chunk_bytes += batch_size * rounded_data_size;
+ fsh->n_free_bytes -= size;
+
+ return 0;
+}
+
+/**
+ * Try to allocate new fifo
+ *
+ * Tries the following steps in order:
+ * - grab fifo and chunk from freelists
+ * - batch fifo and chunk allocation
+ * - single fifo allocation
+ * - grab multiple fifo chunks from freelists
+ */
+static svm_fifo_t *
+fs_try_alloc_fifo (fifo_segment_t * fs, u32 data_bytes)
+{
+ fifo_segment_header_t *fsh = fs->h;
+ u32 fifo_sz, fl_index;
+ svm_fifo_t *f = 0;
+
+ fl_index = fs_freelist_for_size (data_bytes);
+ vec_validate_init_empty (fsh->free_chunks, fl_index, 0);
+ fifo_sz = sizeof (svm_fifo_t) + sizeof (svm_fifo_chunk_t);
+ fifo_sz += 1 << max_log2 (data_bytes);
+
+ if (fsh->free_fifos && fsh->free_chunks[fl_index])
+ {
+ f = fs_try_alloc_fifo_freelist (fs, fl_index, data_bytes);
+ if (f)
+ goto done;
+ }
+ if (fifo_sz * FIFO_SEGMENT_ALLOC_BATCH_SIZE < fsh->n_free_bytes)
+ {
+ if (fs_try_alloc_fifo_batch (fs, fl_index,
+ FIFO_SEGMENT_ALLOC_BATCH_SIZE))
+ goto done;
+
+ f = fs_try_alloc_fifo_freelist (fs, fl_index, data_bytes);
+ goto done;
+ }
+ if (fifo_sz <= fsh->n_free_bytes)
+ {
+ void *oldheap = ssvm_push_heap (fs->ssvm.sh);
+ f = svm_fifo_create (data_bytes);
+ ssvm_pop_heap (oldheap);
+ if (f)
+ {
+ fsh->n_free_bytes -= fifo_sz;
+ goto done;
+ }
+ }
+ if (data_bytes <= fsh->n_fl_chunk_bytes)
+ f = fs_try_alloc_fifo_freelist_multi_chunk (fs, data_bytes);
+
+done:
+
+ return f;
}
/**
fifo_segment_ftype_t ftype)
{
fifo_segment_header_t *fsh;
- ssvm_shared_header_t *sh;
svm_fifo_t *f = 0;
if (!fs_chunk_size_is_valid (data_bytes))
return 0;
}
- sh = fs->ssvm.sh;
- ssvm_lock_non_recursive (sh, 1);
fsh = fs->h;
+ ssvm_lock_non_recursive (fs->ssvm.sh, 1);
- /* 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);
+ f = fs_try_alloc_fifo (fs, data_bytes);
if (!f)
- f = fs_try_allocate_fifo_batch (sh, fsh, data_bytes);
- if (!f)
- {
- void *oldheap = ssvm_push_heap (sh);
- f = svm_fifo_create (data_bytes);
- ssvm_pop_heap (oldheap);
- if (!f)
- goto done;
- }
+ goto done;
/* (re)initialize the fifo, as in svm_fifo_create */
svm_fifo_init (f, data_bytes);
fsh->n_active_fifos++;
done:
- ssvm_unlock_non_recursive (sh);
+ ssvm_unlock_non_recursive (fs->ssvm.sh);
return (f);
}
do
{
next = cur->next;
- fl_index = fs_free_list_for_size (cur->length);
+ fl_index = fs_freelist_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;
+ fsh->n_fl_chunk_bytes += fs_freelist_index_to_size (fl_index);
cur = next;
}
while (cur != f->start_chunk);
ssvm_unlock_non_recursive (sh);
}
+int
+fifo_segment_prealloc_fifo_hdrs (fifo_segment_t * fs, u32 batch_size)
+{
+ fifo_segment_header_t *fsh = fs->h;
+ svm_fifo_t *f;
+ void *oldheap;
+ u32 size;
+ u8 *fmem;
+ int i;
+
+ size = (sizeof (*f)) * batch_size;
+
+ oldheap = ssvm_push_heap (fs->ssvm.sh);
+ 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 (fmem == 0)
+ return -1;
+
+ /* Carve fifo + chunk space */
+ for (i = 0; i < batch_size; i++)
+ {
+ f = (svm_fifo_t *) fmem;
+ memset (f, 0, sizeof (*f));
+ f->next = fsh->free_fifos;
+ fsh->free_fifos = f;
+ fmem += sizeof (*f);
+ }
+
+ fsh->n_free_bytes -= size;
+
+ return 0;
+}
+
+int
+fifo_segment_prealloc_fifo_chunks (fifo_segment_t * fs, u32 chunk_size,
+ u32 batch_size)
+{
+ fifo_segment_header_t *fsh = fs->h;
+ u32 size, rounded_data_size, fl_index;
+ svm_fifo_chunk_t *c;
+ void *oldheap;
+ u8 *cmem;
+ int i;
+
+ if (!fs_chunk_size_is_valid (chunk_size))
+ {
+ clib_warning ("chunk size out of range %d", chunk_size);
+ return -1;
+ }
+
+ fl_index = fs_freelist_for_size (chunk_size);
+ vec_validate_init_empty (fsh->free_chunks, fl_index, 0);
+ rounded_data_size = fs_freelist_index_to_size (fl_index);
+ size = (sizeof (*c) + rounded_data_size) * batch_size;
+
+ oldheap = ssvm_push_heap (fs->ssvm.sh);
+ cmem = 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 (cmem == 0)
+ return -1;
+
+ /* Carve fifo + chunk space */
+ for (i = 0; i < batch_size; i++)
+ {
+ c = (svm_fifo_chunk_t *) cmem;
+ c->start_byte = 0;
+ c->length = rounded_data_size;
+ c->next = fsh->free_chunks[fl_index];
+ fsh->free_chunks[fl_index] = c;
+ cmem += sizeof (*c) + rounded_data_size;
+ }
+
+ fsh->n_fl_chunk_bytes += batch_size * rounded_data_size;
+ fsh->n_free_bytes -= size;
+
+ return 0;
+}
+
/**
* Pre-allocates fifo pairs in fifo segment
*/
u32 rx_fifo_size, u32 tx_fifo_size,
u32 * n_fifo_pairs)
{
- u32 rx_rounded_data_size, tx_rounded_data_size, pair_size;
- u32 rx_fifos_size, tx_fifos_size, pairs_to_allocate;
- ssvm_shared_header_t *sh = fs->ssvm.sh;
- fifo_segment_header_t *fsh = fs->h;
- int i, rx_fl_index, tx_fl_index;
- u8 *rx_fifo_mem, *tx_fifo_mem;
+ u32 rx_rounded_data_size, tx_rounded_data_size, pair_size, pairs_to_alloc;
+ int rx_fl_index, tx_fl_index;
uword space_available;
- svm_fifo_chunk_t *c;
- void *oldheap;
- svm_fifo_t *f;
u32 hdrs;
/* Parameter check */
}
rx_rounded_data_size = (1 << (max_log2 (rx_fifo_size)));
- rx_fl_index = fs_free_list_for_size (rx_fifo_size);
+ rx_fl_index = fs_freelist_for_size (rx_fifo_size);
tx_rounded_data_size = (1 << (max_log2 (tx_fifo_size)));
- tx_fl_index = fs_free_list_for_size (tx_fifo_size);
+ tx_fl_index = fs_freelist_for_size (tx_fifo_size);
- hdrs = sizeof (*f) + sizeof (*c);
+ hdrs = sizeof (svm_fifo_t) + sizeof (svm_fifo_chunk_t);
/* Calculate space requirements */
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
- space_available = fs->ssvm.ssvm_size - mspace_usable_size (sh->heap);
-#endif
-
- pairs_to_allocate = clib_min (space_available / pair_size, *n_fifo_pairs);
- rx_fifos_size = (hdrs + rx_rounded_data_size) * pairs_to_allocate;
- tx_fifos_size = (hdrs + tx_rounded_data_size) * pairs_to_allocate;
+ space_available = fs_free_space (fs);
+ pairs_to_alloc = clib_min (space_available / pair_size, *n_fifo_pairs);
- vec_validate_init_empty (fsh->free_chunks,
- clib_max (rx_fl_index, tx_fl_index), 0);
-
- oldheap = ssvm_push_heap (sh);
-
- /* Allocate rx and tx fifo memory. May fail. */
- rx_fifo_mem = clib_mem_alloc_aligned_at_offset (rx_fifos_size,
- CLIB_CACHE_LINE_BYTES,
- 0 /* align_offset */ ,
- 0 /* os_out_of_memory */ );
- tx_fifo_mem = clib_mem_alloc_aligned_at_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... */
- if (rx_fifo_mem == 0 || tx_fifo_mem == 0)
- {
- rx_fifo_mem ? clib_mem_free (rx_fifo_mem) : clib_mem_free (tx_fifo_mem);
- clib_warning ("fifo preallocation failure: rx size %d tx size %u "
- "npairs %d", rx_fifo_size, tx_fifo_size, *n_fifo_pairs);
- ssvm_pop_heap (oldheap);
- return;
- }
-
- /* Carve rx and tx fifo memory */
- for (i = 0; i < pairs_to_allocate; i++)
- {
- f = (svm_fifo_t *) rx_fifo_mem;
- 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;
- 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;
- }
+ if (fs_try_alloc_fifo_batch (fs, rx_fl_index, pairs_to_alloc))
+ clib_warning ("rx prealloc failed");
+ if (fs_try_alloc_fifo_batch (fs, tx_fl_index, pairs_to_alloc))
+ clib_warning ("tx prealloc failed");
/* Account for the pairs allocated */
- *n_fifo_pairs -= pairs_to_allocate;
- ssvm_pop_heap (oldheap);
+ *n_fifo_pairs -= pairs_to_alloc;
}
int
return 0;
}
- fl_index = fs_free_list_for_size (chunk_size);
+ fl_index = fs_freelist_for_size (chunk_size);
sh = fs->ssvm.sh;
ssvm_lock_non_recursive (sh, 1);
while (cur)
{
next = cur->next;
- fl_index = fs_free_list_for_size (cur->length);
+ fl_index = fs_freelist_for_size (cur->length);
cur->next = fs->h->free_chunks[fl_index];
fs->h->free_chunks[fl_index] = cur;
cur = next;
}
u32
-fifo_segment_num_free_fifos (fifo_segment_t * fs, u32 fifo_size_in_bytes)
+fifo_segment_num_free_fifos (fifo_segment_t * fs)
{
- fifo_segment_header_t *fsh;
- ssvm_shared_header_t *sh;
+ fifo_segment_header_t *fsh = fs->h;
svm_fifo_t *f;
u32 count = 0;
- sh = fs->ssvm.sh;
- fsh = (fifo_segment_header_t *) sh->opaque[0];
-
f = fsh->free_fifos;
if (f == 0)
return 0;
}
rounded_size = (1 << (max_log2 (size)));
- fl_index = fs_free_list_for_size (rounded_size);
+ fl_index = fs_freelist_for_size (rounded_size);
if (fl_index >= vec_len (fsh->free_chunks))
return 0;
return count;
}
+void
+fifo_segment_update_free_bytes (fifo_segment_t * fs)
+{
+ fs->h->n_free_bytes = fs_free_space (fs);
+}
+
+u32
+fifo_segment_free_bytes (fifo_segment_t * fs)
+{
+ return fs->h->n_free_bytes;
+}
+
+u32
+fifo_segment_chunk_prealloc_bytes (fifo_segment_t * fs)
+{
+ return fs->h->n_fl_chunk_bytes;
+}
+
u8
fifo_segment_has_fifos (fifo_segment_t * fs)
{
Code Review / vpp.git / blobdiff