*/
#include <svm/fifo_segment.h>
+#include <vppinfra/mem.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 uword
-fsh_free_space (fifo_segment_header_t * fsh)
+static inline void *
+fsh_alloc_aligned (fifo_segment_header_t *fsh, uword size, uword align)
{
- struct dlmallinfo dlminfo;
+ uword cur_pos, cur_pos_align, new_pos;
+
+ cur_pos = clib_atomic_load_relax_n (&fsh->byte_index);
+ cur_pos_align = round_pow2_u64 (cur_pos, align);
+ size = round_pow2_u64 (size, align);
+ new_pos = cur_pos_align + size;
+
+ if (new_pos >= fsh->max_byte_index)
+ return 0;
+
+ while (!clib_atomic_cmp_and_swap_acq_relax (&fsh->byte_index, &cur_pos,
+ &new_pos, 1 /* weak */))
+ {
+ cur_pos_align = round_pow2_u64 (cur_pos, align);
+ new_pos = cur_pos_align + size;
+ if (new_pos >= fsh->max_byte_index)
+ return 0;
+ }
+ return uword_to_pointer ((u8 *) fsh + cur_pos_align, void *);
+}
- dlminfo = mspace_mallinfo (fsh->ssvm_sh->heap);
- return dlminfo.fordblks;
+static inline void *
+fsh_alloc (fifo_segment_header_t *fsh, uword size)
+{
+ return fsh_alloc_aligned (fsh, size, 8);
}
-static inline void
-fsh_free_bytes_sub (fifo_segment_header_t * fsh, int size)
+static inline fifo_segment_slice_t *
+fsh_slice_get (fifo_segment_header_t * fsh, u32 slice_index)
{
- clib_atomic_fetch_sub_rel (&fsh->n_free_bytes, size);
+ return &fsh->slices[slice_index];
+}
+
+static inline fifo_slice_private_t *
+fs_slice_private_get (fifo_segment_t *fs, u32 slice_index)
+{
+ ASSERT (slice_index < fs->n_slices);
+ return &fs->slices[slice_index];
}
+static char *fifo_segment_mem_status_strings[] = {
+#define _(sym,str) str,
+ foreach_segment_mem_status
+#undef _
+};
+
static inline uword
fsh_n_free_bytes (fifo_segment_header_t * fsh)
{
- uword n_free = clib_atomic_load_relax_n (&fsh->n_free_bytes);
- return n_free > fsh->n_reserved_bytes ? n_free - fsh->n_reserved_bytes : 0;
+ uword cur_pos = clib_atomic_load_relax_n (&fsh->byte_index);
+ ASSERT (fsh->max_byte_index > cur_pos);
+ return fsh->max_byte_index - cur_pos;
+}
+
+static inline void
+fsh_cached_bytes_add (fifo_segment_header_t * fsh, uword size)
+{
+ clib_atomic_fetch_add_rel (&fsh->n_cached_bytes, size);
+}
+
+static inline void
+fsh_cached_bytes_sub (fifo_segment_header_t * fsh, uword size)
+{
+ clib_atomic_fetch_sub_rel (&fsh->n_cached_bytes, size);
+}
+
+static inline uword
+fsh_n_cached_bytes (fifo_segment_header_t * fsh)
+{
+ uword n_cached = clib_atomic_load_relax_n (&fsh->n_cached_bytes);
+ return n_cached;
}
static inline void
-fsh_update_free_bytes (fifo_segment_header_t * fsh)
+fsh_active_fifos_update (fifo_segment_header_t * fsh, int inc)
+{
+ clib_atomic_fetch_add_rel (&fsh->n_active_fifos, inc);
+}
+
+static inline u32
+fsh_n_active_fifos (fifo_segment_header_t * fsh)
+{
+ return clib_atomic_load_relax_n (&fsh->n_active_fifos);
+}
+
+static inline uword
+fsh_virtual_mem (fifo_segment_header_t * fsh)
+{
+ fifo_segment_slice_t *fss;
+ uword total_vm = 0;
+ int i;
+
+ for (i = 0; i < fsh->n_slices; i++)
+ {
+ fss = fsh_slice_get (fsh, i);
+ total_vm += clib_atomic_load_relax_n (&fss->virtual_mem);
+ }
+ return total_vm;
+}
+
+void
+fsh_virtual_mem_update (fifo_segment_header_t * fsh, u32 slice_index,
+ int n_bytes)
+{
+ fifo_segment_slice_t *fss = fsh_slice_get (fsh, slice_index);
+ fss->virtual_mem += n_bytes;
+}
+
+static inline int
+fss_chunk_fl_index_is_valid (fifo_segment_slice_t *fss, u32 fl_index)
+{
+ return (fl_index < FS_CHUNK_VEC_LEN);
+}
+
+#define FS_CL_HEAD_MASK 0xFFFFFFFFFFFF
+#define FS_CL_HEAD_TMASK 0xFFFF000000000000
+#define FS_CL_HEAD_TINC (1ULL << 48)
+
+static svm_fifo_chunk_t *
+fss_chunk_free_list_head (fifo_segment_header_t *fsh,
+ fifo_segment_slice_t *fss, u32 fl_index)
{
- clib_atomic_store_rel_n (&fsh->n_free_bytes, fsh_free_space (fsh));
+ fs_sptr_t headsp = clib_atomic_load_relax_n (&fss->free_chunks[fl_index]);
+ return fs_chunk_ptr (fsh, headsp & FS_CL_HEAD_MASK);
}
static void
-fsh_check_mem (fifo_segment_header_t * fsh)
+fss_chunk_free_list_push (fifo_segment_header_t *fsh,
+ fifo_segment_slice_t *fss, u32 fl_index,
+ svm_fifo_chunk_t *c)
{
- uword thresh;
+ fs_sptr_t old_head, new_head, csp;
- if (fsh->flags & FIFO_SEGMENT_F_MEM_LIMIT)
- return;
+ csp = fs_chunk_sptr (fsh, c);
+ ASSERT (csp <= FS_CL_HEAD_MASK);
+ old_head = clib_atomic_load_acq_n (&fss->free_chunks[fl_index]);
- thresh = clib_max (0.01 * fsh->ssvm_sh->ssvm_size,
- 2 * fsh->n_reserved_bytes);
- if (fsh->n_free_bytes > thresh)
- return;
+ do
+ {
+ c->next = old_head & FS_CL_HEAD_MASK;
+ new_head = csp + ((old_head + FS_CL_HEAD_TINC) & FS_CL_HEAD_TMASK);
+ }
+ while (!clib_atomic_cmp_and_swap_acq_relax (
+ &fss->free_chunks[fl_index], &old_head, &new_head, 1 /* weak */));
+}
+
+static void
+fss_chunk_free_list_push_list (fifo_segment_header_t *fsh,
+ fifo_segment_slice_t *fss, u32 fl_index,
+ svm_fifo_chunk_t *head, svm_fifo_chunk_t *tail)
+{
+ fs_sptr_t old_head, new_head, headsp;
- fsh->flags |= FIFO_SEGMENT_F_MEM_LIMIT;
- fsh_update_free_bytes (fsh);
+ headsp = fs_chunk_sptr (fsh, head);
+ ASSERT (headsp <= FS_CL_HEAD_MASK);
+ old_head = clib_atomic_load_acq_n (&fss->free_chunks[fl_index]);
+
+ do
+ {
+ tail->next = old_head & FS_CL_HEAD_MASK;
+ new_head = headsp + ((old_head + FS_CL_HEAD_TINC) & FS_CL_HEAD_TMASK);
+ }
+ while (!clib_atomic_cmp_and_swap_acq_relax (
+ &fss->free_chunks[fl_index], &old_head, &new_head, 1 /* weak */));
}
-static inline fifo_segment_slice_t *
-fsh_slice_get (fifo_segment_header_t * fsh, u32 slice_index)
+static svm_fifo_chunk_t *
+fss_chunk_free_list_pop (fifo_segment_header_t *fsh, fifo_segment_slice_t *fss,
+ u32 fl_index)
{
- return &fsh->slices[slice_index];
+ fs_sptr_t old_head, new_head;
+ svm_fifo_chunk_t *c;
+
+ ASSERT (fss_chunk_fl_index_is_valid (fss, fl_index));
+
+ old_head = clib_atomic_load_acq_n (&fss->free_chunks[fl_index]);
+
+ /* Lock-free stacks are affected by ABA if a side allocates a chunk and
+ * shortly thereafter frees it. To circumvent that, reuse the upper bits
+ * of the head of the list shared pointer, i.e., offset to where the chunk
+ * is, as a tag. The tag is incremented with each push/pop operation and
+ * therefore collisions can only happen if an element is popped and pushed
+ * exactly after a complete wrap of the tag (16 bits). It's unlikely either
+ * of the sides will be descheduled for that long */
+ do
+ {
+ if (!(old_head & FS_CL_HEAD_MASK))
+ return 0;
+ c = fs_chunk_ptr (fsh, old_head & FS_CL_HEAD_MASK);
+ new_head = c->next + ((old_head + FS_CL_HEAD_TINC) & FS_CL_HEAD_TMASK);
+ }
+ while (!clib_atomic_cmp_and_swap_acq_relax (
+ &fss->free_chunks[fl_index], &old_head, &new_head, 1 /* weak */));
+
+ return c;
+}
+
+static void
+fss_fifo_free_list_push (fifo_segment_header_t *fsh, fifo_segment_slice_t *fss,
+ svm_fifo_shared_t *sf)
+{
+ sf->next = fss->free_fifos;
+ fss->free_fifos = fs_sptr (fsh, sf);
+}
+
+static void
+fss_fifo_free_list_push_list (fifo_segment_header_t *fsh,
+ fifo_segment_slice_t *fss,
+ svm_fifo_shared_t *head, svm_fifo_shared_t *tail)
+{
+ tail->next = fss->free_fifos;
+ fss->free_fifos = fs_sptr (fsh, head);
+}
+
+svm_fifo_shared_t *
+fss_fifo_free_list_pop (fifo_segment_header_t *fsh, fifo_segment_slice_t *fss)
+{
+ svm_fifo_shared_t *sf;
+ sf = fs_ptr (fsh, fss->free_fifos);
+ fss->free_fifos = sf->next;
+ return sf;
}
static inline void
-fsh_active_fifos_update (fifo_segment_header_t * fsh, int inc)
+pfss_fifo_add_active_list (fifo_slice_private_t *pfss, svm_fifo_t *f)
{
- clib_atomic_fetch_add_rel (&fsh->n_active_fifos, inc);
+ if (pfss->active_fifos)
+ {
+ pfss->active_fifos->prev = f;
+ f->next = pfss->active_fifos;
+ }
+ pfss->active_fifos = f;
+}
+
+static inline void
+pfss_fifo_del_active_list (fifo_slice_private_t *pfss, svm_fifo_t *f)
+{
+ if (f->flags & SVM_FIFO_F_LL_TRACKED)
+ {
+ if (f->prev)
+ f->prev->next = f->next;
+ else
+ pfss->active_fifos = f->next;
+ if (f->next)
+ f->next->prev = f->prev;
+ }
+}
+
+static inline uword
+fss_fl_chunk_bytes (fifo_segment_slice_t * fss)
+{
+ return clib_atomic_load_relax_n (&fss->n_fl_chunk_bytes);
+}
+
+static inline void
+fss_fl_chunk_bytes_add (fifo_segment_slice_t * fss, uword size)
+{
+ clib_atomic_fetch_add_relax (&fss->n_fl_chunk_bytes, size);
+}
+
+static inline void
+fss_fl_chunk_bytes_sub (fifo_segment_slice_t * fss, uword size)
+{
+ clib_atomic_fetch_sub_relax (&fss->n_fl_chunk_bytes, size);
}
/**
int
fifo_segment_init (fifo_segment_t * fs)
{
+ u32 align = 8, offset = 2 * 4096, slices_sz, i;
+ uword max_fifo, seg_start, seg_sz;
fifo_segment_header_t *fsh;
- fifo_segment_slice_t *fss;
ssvm_shared_header_t *sh;
- u32 max_chunk_sz, max_chunks;
- uword max_fifo;
- void *oldheap;
- int i;
+ void *seg_data;
+ /* TODO remove ssvm heap entirely */
sh = fs->ssvm.sh;
- oldheap = ssvm_push_heap (sh);
- /*
- * Manually align the fifo segment header to sizeof(uword) = 8 bytes.
- * Long story made short: the "process-private" fifo segment
- * is allocated from the main heap, not mmapped. dlmalloc
- * only guarantees 4-byte alignment, and on aarch64
- * the fsh can end up 4-byte but not 8-byte aligned.
- * That eventually causes the atomic op in fifo_segment_update_free_bytes
- * to backfire.
- */
- fsh = clib_mem_alloc_aligned (sizeof (*fsh), sizeof (uword));
- clib_memset (fsh, 0, sizeof (*fsh));
- fs->h = sh->opaque[0] = fsh;
+ seg_data = (u8 *) sh + offset;
+ seg_sz = sh->ssvm_size - offset;
+
fs->n_slices = clib_max (fs->n_slices, 1);
+ slices_sz = sizeof (fifo_segment_slice_t) * fs->n_slices;
+
+ seg_start = round_pow2_u64 (pointer_to_uword (seg_data), align);
+ fsh = uword_to_pointer (seg_start, void *);
+ CLIB_MEM_UNPOISON (fsh, seg_sz);
+ memset (fsh, 0, sizeof (*fsh) + slices_sz);
- fsh->ssvm_sh = fs->ssvm.sh;
+ fsh->byte_index = sizeof (*fsh) + slices_sz;
+ fsh->max_byte_index = seg_sz;
fsh->n_slices = fs->n_slices;
- max_fifo = clib_min ((fsh_free_space (fsh) - 4096) / 2,
- FIFO_SEGMENT_MAX_FIFO_SIZE);
- fsh->max_log2_chunk_size = max_log2 (max_fifo);
+ max_fifo = clib_min ((seg_sz - slices_sz) / 2, FIFO_SEGMENT_MAX_FIFO_SIZE);
+ fsh->max_log2_fifo_size = min_log2 (max_fifo);
+ fsh->n_cached_bytes = 0;
+ fsh->n_reserved_bytes = fsh->byte_index;
+ fsh->start_byte_index = fsh->byte_index;
+ ASSERT (fsh->max_byte_index <= sh->ssvm_size - offset);
- fsh->slices = clib_mem_alloc (sizeof (*fss) * fs->n_slices);
- clib_memset (fsh->slices, 0, sizeof (*fss) * fs->n_slices);
- max_chunk_sz = fsh->max_log2_chunk_size - FIFO_SEGMENT_MIN_LOG2_FIFO_SIZE;
+ fs->max_byte_index = fsh->max_byte_index;
+ fs->h = fsh;
+ sh->opaque[0] = (void *) ((u8 *) fsh - (u8 *) fs->ssvm.sh);
- for (i = 0; i < fs->n_slices; i++)
- {
- fss = fsh_slice_get (fsh, i);
- vec_validate_init_empty (fss->free_chunks, max_chunk_sz, 0);
- clib_spinlock_init (&fss->chunk_lock);
- }
+ /* Allow random offsets */
+ fs->ssvm.sh->ssvm_va = 0;
- ssvm_pop_heap (oldheap);
+ vec_validate (fs->slices, fs->n_slices - 1);
+ for (i = 0; i < fs->n_slices; i++)
+ fs->slices[i].fifos =
+ clib_mem_bulk_init (sizeof (svm_fifo_t), CLIB_CACHE_LINE_BYTES, 32);
- fsh->n_free_bytes = fsh_free_space (fsh);
- max_chunks = fsh->n_free_bytes / FIFO_SEGMENT_MIN_FIFO_SIZE;
- fsh->n_reserved_bytes = (max_chunks / 4) * sizeof (rb_node_t);
sh->ready = 1;
return (0);
}
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.is_server = 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 (&fs->ssvm, a->segment_type)))
+ if ((rv = ssvm_server_init (&fs->ssvm, a->segment_type)))
{
pool_put (sm->segments, fs);
return (rv);
int
fifo_segment_attach (fifo_segment_main_t * sm, fifo_segment_create_args_t * a)
{
+ fifo_segment_header_t *fsh;
fifo_segment_t *fs;
int rv;
fs->ssvm.ssvm_size = a->segment_size;
fs->ssvm.my_pid = getpid ();
fs->ssvm.name = format (0, "%s%c", a->segment_name, 0);
- fs->ssvm.requested_va = sm->next_baseva;
+ fs->ssvm.requested_va = 0;
if (a->segment_type == SSVM_SEGMENT_MEMFD)
fs->ssvm.fd = a->memfd_fd;
else
fs->ssvm.attach_timeout = sm->timeout_in_seconds;
- if ((rv = ssvm_slave_init (&fs->ssvm, a->segment_type)))
+ if ((rv = ssvm_client_init (&fs->ssvm, a->segment_type)))
{
- _vec_len (fs) = vec_len (fs) - 1;
+ pool_put (sm->segments, fs);
return (rv);
}
- /* Fish the segment header */
- fs->h = fs->ssvm.sh->opaque[0];
+ /* Probably a segment without fifos */
+ if (!fs->ssvm.sh->opaque[0])
+ goto done;
+
+ fsh = fs->h = (void *) fs->ssvm.sh + (uword) fs->ssvm.sh->opaque[0];
+ fs->max_byte_index = fsh->max_byte_index;
+ vec_validate (fs->slices, 0);
+ fs->slices[0].fifos =
+ clib_mem_bulk_init (sizeof (svm_fifo_t), CLIB_CACHE_LINE_BYTES, 32);
+done:
vec_add1 (a->new_segment_indices, fs - sm->segments);
return (0);
}
void
fifo_segment_delete (fifo_segment_main_t * sm, fifo_segment_t * s)
{
+ fifo_segment_cleanup (s);
ssvm_delete (&s->ssvm);
clib_memset (s, 0xfe, sizeof (*s));
pool_put (sm->segments, s);
return pool_elt_at_index (sm->segments, segment_index);
}
+fifo_segment_t *
+fifo_segment_get_segment_if_valid (fifo_segment_main_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);
+}
+
void
fifo_segment_info (fifo_segment_t * seg, char **address, size_t * size)
{
{
if (PREDICT_FALSE (size < FIFO_SEGMENT_MIN_FIFO_SIZE))
return 0;
- return max_log2 (size) - FIFO_SEGMENT_MIN_LOG2_FIFO_SIZE;
+ return clib_min (max_log2 (size) - FIFO_SEGMENT_MIN_LOG2_FIFO_SIZE,
+ FS_CHUNK_VEC_LEN - 1);
}
static inline u32
* 4K minimum. It's not likely that anything good will happen
* with a smaller FIFO.
*/
- return size >= FIFO_SEGMENT_MIN_FIFO_SIZE
- && size <= (1 << fsh->max_log2_chunk_size);
-}
-
-static svm_fifo_t *
-fs_try_alloc_fifo_freelist (fifo_segment_slice_t * fss,
- u32 fl_index, u32 data_bytes)
-{
- svm_fifo_chunk_t *c;
- svm_fifo_t *f;
-
- f = fss->free_fifos;
- c = fss->free_chunks[fl_index];
-
- if (!f || !c)
- return 0;
-
- fss->free_fifos = f->next;
- fss->free_chunks[fl_index] = c->next;
- c->next = 0;
- c->start_byte = 0;
- memset (f, 0, sizeof (*f));
- f->start_chunk = c;
- f->end_chunk = c;
-
- fss->n_fl_chunk_bytes -= fs_freelist_index_to_size (fl_index);
- return f;
+ return size >= FIFO_SEGMENT_MIN_FIFO_SIZE &&
+ size <= (1ULL << fsh->max_log2_fifo_size);
}
-static svm_fifo_t *
-fs_try_alloc_fifo_freelist_multi_chunk (fifo_segment_header_t * fsh,
- fifo_segment_slice_t * fss,
- u32 data_bytes)
+svm_fifo_chunk_t *
+fs_try_alloc_multi_chunk (fifo_segment_header_t * fsh,
+ fifo_segment_slice_t * fss, u32 data_bytes)
{
- svm_fifo_chunk_t *c, *first = 0, *last = 0;
- u32 fl_index, fl_size, n_alloc = 0;
- svm_fifo_t *f;
-
- f = fss->free_fifos;
- if (!f)
- {
- void *oldheap = ssvm_push_heap (fsh->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));
- fsh_free_bytes_sub (fsh, sizeof (*f));
- }
- else
- {
- fss->free_fifos = f->next;
- }
+ u32 fl_index, fl_size, n_alloc = 0, req_bytes = data_bytes;
+ svm_fifo_chunk_t *c, *first = 0, *next;
- fl_index = fs_freelist_for_size (data_bytes);
+ fl_index = fs_freelist_for_size (req_bytes);
if (fl_index > 0)
fl_index -= 1;
fl_size = fs_freelist_index_to_size (fl_index);
- while (data_bytes)
+ while (req_bytes)
{
- c = fss->free_chunks[fl_index];
+ c = fss_chunk_free_list_pop (fsh, fss, fl_index);
if (c)
{
- fss->free_chunks[fl_index] = c->next;
- if (!last)
- last = c;
- c->next = first;
+ c->next = fs_chunk_sptr (fsh, first);
first = c;
n_alloc += fl_size;
- data_bytes -= c->length;
+ req_bytes -= clib_min (fl_size, req_bytes);
}
else
{
/* Failed to allocate with smaller chunks */
if (fl_index == 0)
{
- /* free all chunks if any allocated */
+ /* Free all chunks if any allocated */
c = first;
while (c)
{
fl_index = fs_freelist_for_size (c->length);
- fl_size = fs_freelist_index_to_size (fl_index);
- c->next = fss->free_chunks[fl_index];
- fss->free_chunks[fl_index] = c;
- fss->n_fl_chunk_bytes += fl_size;
- data_bytes += fl_size;
+ next = fs_chunk_ptr (fsh, c->next);
+ fss_chunk_free_list_push (fsh, fss, fl_index, c);
+ c = next;
}
- first = last = 0;
- fl_index = fs_freelist_for_size (data_bytes);
- if (fss->free_chunks[fl_index + 1])
+ n_alloc = 0;
+ first = 0;
+ /* As last attempt, try allocating a chunk larger than
+ * the requested size, if possible */
+ fl_index = fs_freelist_for_size (data_bytes) + 1;
+ if (!fss_chunk_fl_index_is_valid (fss, fl_index))
+ return 0;
+ first = fss_chunk_free_list_pop (fsh, fss, fl_index);
+ if (first)
{
- fl_index += 1;
- fl_size = fs_freelist_index_to_size (fl_index);
- continue;
+ first->next = 0;
+ n_alloc = fs_freelist_index_to_size (fl_index);
+ goto done;
}
-
- f->next = fss->free_fifos;
- fss->free_fifos = f;
return 0;
}
fl_index -= 1;
}
}
- f->start_chunk = first;
- f->end_chunk = last;
- fss->n_fl_chunk_bytes -= n_alloc;
- return f;
+done:
+ fss_fl_chunk_bytes_sub (fss, n_alloc);
+ fsh_cached_bytes_sub (fsh, n_alloc);
+ return first;
}
static int
-fs_try_alloc_fifo_batch (fifo_segment_header_t * fsh,
- fifo_segment_slice_t * fss,
- u32 fl_index, u32 batch_size)
+fsh_try_alloc_fifo_hdr_batch (fifo_segment_header_t * fsh,
+ fifo_segment_slice_t * fss, u32 batch_size)
{
- u32 hdrs, rounded_data_size;
- svm_fifo_chunk_t *c;
- svm_fifo_t *f;
- void *oldheap;
+ svm_fifo_shared_t *f, *head = 0, *tail;
uword size;
u8 *fmem;
int i;
- rounded_data_size = fs_freelist_index_to_size (fl_index);
- hdrs = sizeof (*f) + sizeof (*c);
- size = (uword) (hdrs + rounded_data_size) * batch_size;
+ ASSERT (batch_size != 0);
- oldheap = ssvm_push_heap (fsh->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);
+ size = (uword) sizeof (*f) * batch_size;
- /* Out of space.. */
+ fmem = fsh_alloc_aligned (fsh, size, CLIB_CACHE_LINE_BYTES);
if (fmem == 0)
return -1;
+ /* Carve fifo hdr space */
+ tail = f = (svm_fifo_shared_t *) fmem;
+ for (i = 0; i < batch_size; i++)
+ {
+ clib_memset (f, 0, sizeof (*f));
+ f->next = fs_sptr (fsh, head);
+ head = f;
+ fmem += sizeof (*f);
+ f = (svm_fifo_shared_t *) fmem;
+ }
+
+ fss_fifo_free_list_push_list (fsh, fss, head, tail);
+
+ return 0;
+}
+
+static int
+fsh_try_alloc_chunk_batch (fifo_segment_header_t * fsh,
+ fifo_segment_slice_t * fss,
+ u32 fl_index, u32 batch_size)
+{
+ svm_fifo_chunk_t *c, *head = 0, *tail;
+ uword size, total_chunk_bytes;
+ u32 rounded_data_size;
+ u8 *cmem;
+ int i;
+
+ ASSERT (batch_size != 0);
+
+ rounded_data_size = fs_freelist_index_to_size (fl_index);
+ total_chunk_bytes = (uword) batch_size *rounded_data_size;
+ size = (uword) (sizeof (*c) + rounded_data_size) * batch_size;
+
+ cmem = fsh_alloc_aligned (fsh, size, 8 /* chunk hdr is 24B */);
+ if (cmem == 0)
+ return -1;
+
/* Carve fifo + chunk space */
+ tail = c = (svm_fifo_chunk_t *) cmem;
for (i = 0; i < batch_size; i++)
{
- f = (svm_fifo_t *) fmem;
- memset (f, 0, sizeof (*f));
- f->next = fss->free_fifos;
- fss->free_fifos = f;
- c = (svm_fifo_chunk_t *) (fmem + sizeof (*f));
c->start_byte = 0;
c->length = rounded_data_size;
- c->enq_rb_index = RBTREE_TNIL_INDEX;
- c->deq_rb_index = RBTREE_TNIL_INDEX;
- c->next = fss->free_chunks[fl_index];
- fss->free_chunks[fl_index] = c;
- fmem += hdrs + rounded_data_size;
+ c->next = fs_chunk_sptr (fsh, head);
+ head = c;
+ cmem += sizeof (*c) + rounded_data_size;
+ c = (svm_fifo_chunk_t *) cmem;
}
- fss->n_fl_chunk_bytes += batch_size * rounded_data_size;
- fsh_free_bytes_sub (fsh, size);
+ fss_chunk_free_list_push_list (fsh, fss, fl_index, head, tail);
+ fss->num_chunks[fl_index] += batch_size;
+ fss_fl_chunk_bytes_add (fss, total_chunk_bytes);
+ fsh_cached_bytes_add (fsh, total_chunk_bytes);
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_header_t * fsh, fifo_segment_slice_t * fss,
- u32 data_bytes)
+static int
+fs_try_alloc_fifo_batch (fifo_segment_header_t * fsh,
+ fifo_segment_slice_t * fss,
+ u32 fl_index, u32 batch_size)
{
- u32 fifo_sz, fl_index;
- svm_fifo_t *f = 0;
- uword n_free_bytes;
+ if (fsh_try_alloc_fifo_hdr_batch (fsh, fss, batch_size))
+ return 0;
+ return fsh_try_alloc_chunk_batch (fsh, fss, fl_index, batch_size);
+}
- fl_index = fs_freelist_for_size (data_bytes);
- fifo_sz = sizeof (svm_fifo_t) + sizeof (svm_fifo_chunk_t);
- fifo_sz += 1 << max_log2 (data_bytes);
+static svm_fifo_shared_t *
+fsh_try_alloc_fifo_hdr (fifo_segment_header_t *fsh, fifo_segment_slice_t *fss)
+{
+ svm_fifo_shared_t *sf;
- if (fss->free_fifos && fss->free_chunks[fl_index])
+ if (!fss->free_fifos)
{
- f = fs_try_alloc_fifo_freelist (fss, fl_index, data_bytes);
- if (f)
- goto done;
+ if (fsh_try_alloc_fifo_hdr_batch (fsh, fss,
+ FIFO_SEGMENT_ALLOC_BATCH_SIZE))
+ return 0;
}
- fsh_check_mem (fsh);
- n_free_bytes = fsh_n_free_bytes (fsh);
- if (fifo_sz * FIFO_SEGMENT_ALLOC_BATCH_SIZE < n_free_bytes)
- {
- if (fs_try_alloc_fifo_batch (fsh, fss, fl_index,
- FIFO_SEGMENT_ALLOC_BATCH_SIZE))
- goto done;
+ sf = fss_fifo_free_list_pop (fsh, fss);
+ clib_memset (sf, 0, sizeof (*sf));
+
+ return sf;
+}
+
+static svm_fifo_chunk_t *
+fsh_try_alloc_chunk (fifo_segment_header_t * fsh,
+ fifo_segment_slice_t * fss, u32 data_bytes)
+{
+ svm_fifo_chunk_t *c;
+ u32 fl_index;
- f = fs_try_alloc_fifo_freelist (fss, fl_index, data_bytes);
- goto done;
+ fl_index = fs_freelist_for_size (data_bytes);
+
+free_list:
+ c = fss_chunk_free_list_pop (fsh, fss, fl_index);
+ if (c)
+ {
+ c->next = 0;
+ fss_fl_chunk_bytes_sub (fss, fs_freelist_index_to_size (fl_index));
+ fsh_cached_bytes_sub (fsh, fs_freelist_index_to_size (fl_index));
}
- if (fifo_sz <= n_free_bytes)
+ else
{
- void *oldheap = ssvm_push_heap (fsh->ssvm_sh);
- f = svm_fifo_alloc (data_bytes);
- ssvm_pop_heap (oldheap);
- if (f)
+ u32 chunk_size, batch = FIFO_SEGMENT_ALLOC_BATCH_SIZE;
+ uword n_free;
+
+ chunk_size = fs_freelist_index_to_size (fl_index);
+ n_free = fsh_n_free_bytes (fsh);
+
+ if (chunk_size <= n_free)
{
- fsh_free_bytes_sub (fsh, fifo_sz);
- goto done;
+ batch = chunk_size * batch <= n_free ? batch : 1;
+ if (!fsh_try_alloc_chunk_batch (fsh, fss, fl_index, batch))
+ goto free_list;
+ }
+ /* Failed to allocate larger chunk, try to allocate multi-chunk
+ * that is close to what was actually requested */
+ if (data_bytes <= fss_fl_chunk_bytes (fss))
+ {
+ c = fs_try_alloc_multi_chunk (fsh, fss, data_bytes);
+ if (c)
+ goto done;
+ batch = n_free / FIFO_SEGMENT_MIN_FIFO_SIZE;
+ if (!batch || fsh_try_alloc_chunk_batch (fsh, fss, 0, batch))
+ goto done;
+ }
+ if (data_bytes <= fss_fl_chunk_bytes (fss) + n_free)
+ {
+ u32 min_size = FIFO_SEGMENT_MIN_FIFO_SIZE;
+ if (n_free < min_size)
+ goto done;
+ batch = (data_bytes - fss_fl_chunk_bytes (fss)) / min_size;
+ batch = clib_min (batch + 1, n_free / min_size);
+ if (fsh_try_alloc_chunk_batch (fsh, fss, 0, batch))
+ goto done;
+ c = fs_try_alloc_multi_chunk (fsh, fss, data_bytes);
}
}
- if (data_bytes <= fss->n_fl_chunk_bytes)
- f = fs_try_alloc_fifo_freelist_multi_chunk (fsh, fss, data_bytes);
done:
- if (f)
- f->fs_hdr = fsh;
- return f;
+ return c;
}
-svm_fifo_chunk_t *
-fsh_alloc_chunk (fifo_segment_header_t * fsh, u32 slice_index, u32 chunk_size)
+/**
+ * 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_shared_t *
+fs_try_alloc_fifo (fifo_segment_header_t *fsh, u32 slice_index, u32 data_bytes)
{
fifo_segment_slice_t *fss;
+ u32 fl_index, min_size;
svm_fifo_chunk_t *c;
- void *oldheap;
- int fl_index;
+ svm_fifo_shared_t *sf = 0;
- fl_index = fs_freelist_for_size (chunk_size);
fss = fsh_slice_get (fsh, slice_index);
+ min_size = clib_max ((fsh->pct_first_alloc * data_bytes) / 100, 4096);
+ fl_index = fs_freelist_for_size (min_size);
+
+ if (!fss_chunk_fl_index_is_valid (fss, fl_index))
+ return 0;
- clib_spinlock_lock (&fss->chunk_lock);
- c = fss->free_chunks[fl_index];
+ sf = fsh_try_alloc_fifo_hdr (fsh, fss);
+ if (!sf)
+ return 0;
+ c = fsh_try_alloc_chunk (fsh, fss, min_size);
if (!c)
{
- fsh_check_mem (fsh);
- chunk_size = fs_freelist_index_to_size (fl_index);
- if (fsh_n_free_bytes (fsh) < chunk_size)
- goto done;
-
- oldheap = ssvm_push_heap (fsh->ssvm_sh);
- c = svm_fifo_chunk_alloc (chunk_size);
- ssvm_pop_heap (oldheap);
+ fss_fifo_free_list_push (fsh, fss, sf);
+ return 0;
+ }
- if (!c)
- goto done;
+ sf->start_chunk = fs_chunk_sptr (fsh, c);
+ while (c->next)
+ c = fs_chunk_ptr (fsh, c->next);
+ sf->end_chunk = fs_chunk_sptr (fsh, c);
+ sf->size = data_bytes;
+ sf->slice_index = slice_index;
- fsh_free_bytes_sub (fsh, chunk_size + sizeof (*c));
- }
- else
- {
- fss->free_chunks[fl_index] = c->next;
- c->next = 0;
- fss->n_fl_chunk_bytes -= fs_freelist_index_to_size (fl_index);
- }
+ return sf;
+}
-done:
+svm_fifo_chunk_t *
+fsh_alloc_chunk (fifo_segment_header_t * fsh, u32 slice_index, u32 chunk_size)
+{
+ fifo_segment_slice_t *fss;
+ svm_fifo_chunk_t *c;
- clib_spinlock_unlock (&fss->chunk_lock);
+ fss = fsh_slice_get (fsh, slice_index);
+ c = fsh_try_alloc_chunk (fsh, fss, chunk_size);
return c;
}
static void
-fsh_slice_collect_chunks (fifo_segment_slice_t * fss, svm_fifo_chunk_t * cur)
+fsh_slice_collect_chunks (fifo_segment_header_t * fsh,
+ fifo_segment_slice_t * fss, svm_fifo_chunk_t * c)
{
+ u32 n_collect = 0, fl_index;
svm_fifo_chunk_t *next;
- int fl_index;
-
- clib_spinlock_lock (&fss->chunk_lock);
- while (cur)
+ while (c)
{
- next = cur->next;
- fl_index = fs_freelist_for_size (cur->length);
- cur->next = fss->free_chunks[fl_index];
- cur->enq_rb_index = RBTREE_TNIL_INDEX;
- cur->deq_rb_index = RBTREE_TNIL_INDEX;
- fss->free_chunks[fl_index] = cur;
- fss->n_fl_chunk_bytes += fs_freelist_index_to_size (fl_index);
- cur = next;
+ CLIB_MEM_UNPOISON (c, sizeof (*c));
+ next = fs_chunk_ptr (fsh, c->next);
+ fl_index = fs_freelist_for_size (c->length);
+ fss_chunk_free_list_push (fsh, fss, fl_index, c);
+ n_collect += fs_freelist_index_to_size (fl_index);
+ c = next;
}
- clib_spinlock_unlock (&fss->chunk_lock);
+ fss_fl_chunk_bytes_add (fss, n_collect);
+ fsh_cached_bytes_add (fsh, n_collect);
}
void
fsh_collect_chunks (fifo_segment_header_t * fsh, u32 slice_index,
- svm_fifo_chunk_t * cur)
+ svm_fifo_chunk_t * c)
{
fifo_segment_slice_t *fss;
fss = fsh_slice_get (fsh, slice_index);
- fsh_slice_collect_chunks (fss, cur);
+ fsh_slice_collect_chunks (fsh, fss, c);
+}
+
+svm_fifo_t *
+fs_fifo_alloc (fifo_segment_t *fs, u32 slice_index)
+{
+ fifo_slice_private_t *pfss = &fs->slices[slice_index];
+ svm_fifo_t *f;
+
+ f = clib_mem_bulk_alloc (pfss->fifos);
+ clib_memset (f, 0, sizeof (*f));
+ return f;
+}
+
+void
+fs_fifo_free (fifo_segment_t *fs, svm_fifo_t *f, u32 slice_index)
+{
+ fifo_slice_private_t *pfss;
+
+ if (CLIB_DEBUG)
+ clib_memset (f, 0xfc, sizeof (*f));
+
+ pfss = &fs->slices[slice_index];
+ clib_mem_bulk_free (pfss->fifos, f);
+}
+
+void
+fifo_segment_cleanup (fifo_segment_t *fs)
+{
+ int slice_index;
+ svm_msg_q_t *mq = 0;
+
+ for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
+ clib_mem_bulk_destroy (fs->slices[slice_index].fifos);
+
+ vec_free (fs->slices);
+
+ vec_foreach (fs->mqs, mq)
+ svm_msg_q_cleanup (mq);
+
+ vec_free (fs->mqs);
}
/**
u32 data_bytes, fifo_segment_ftype_t ftype)
{
fifo_segment_header_t *fsh = fs->h;
+ fifo_slice_private_t *pfss;
fifo_segment_slice_t *fss;
+ svm_fifo_shared_t *sf;
svm_fifo_t *f = 0;
ASSERT (slice_index < fs->n_slices);
- fss = fsh_slice_get (fsh, slice_index);
- f = fs_try_alloc_fifo (fsh, fss, data_bytes);
- if (!f)
+ if (PREDICT_FALSE (data_bytes > 1 << fsh->max_log2_fifo_size))
+ return 0;
+
+ sf = fs_try_alloc_fifo (fsh, slice_index, data_bytes);
+ if (!sf)
goto done;
- f->slice_index = slice_index;
+ f = fs_fifo_alloc (fs, slice_index);
+ f->fs_hdr = fsh;
+ f->shr = sf;
svm_fifo_init (f, data_bytes);
+ fss = fsh_slice_get (fsh, slice_index);
+ pfss = fs_slice_private_get (fs, slice_index);
+
/* 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
* only one. */
if (ftype == FIFO_SEGMENT_RX_FIFO)
{
- if (fss->fifos)
- {
- fss->fifos->prev = f;
- f->next = fss->fifos;
- }
- fss->fifos = f;
+ pfss_fifo_add_active_list (pfss, f);
f->flags |= SVM_FIFO_F_LL_TRACKED;
-
- svm_fifo_init_ooo_lookup (f, 0 /* ooo enq */ );
- }
- else
- {
- svm_fifo_init_ooo_lookup (f, 1 /* ooo deq */ );
}
fsh_active_fifos_update (fsh, 1);
+ fss->virtual_mem += svm_fifo_size (f);
done:
return (f);
}
+svm_fifo_t *
+fifo_segment_alloc_fifo_w_offset (fifo_segment_t *fs, uword offset)
+{
+ svm_fifo_t *f = fs_fifo_alloc (fs, 0);
+ svm_fifo_shared_t *sf;
+
+ sf = (svm_fifo_shared_t *) ((u8 *) fs->h + offset);
+ f->fs_hdr = fs->h;
+ f->shr = sf;
+
+ f->ooos_list_head = OOO_SEGMENT_INVALID_INDEX;
+ f->segment_index = SVM_FIFO_INVALID_INDEX;
+ f->refcnt = 1;
+ return f;
+}
+
/**
* Free fifo allocated in fifo segment
*/
fifo_segment_free_fifo (fifo_segment_t * fs, svm_fifo_t * f)
{
fifo_segment_header_t *fsh = fs->h;
+ fifo_slice_private_t *pfss;
fifo_segment_slice_t *fss;
+ svm_fifo_shared_t *sf;
ASSERT (f->refcnt > 0);
if (--f->refcnt > 0)
return;
- fss = fsh_slice_get (fsh, f->slice_index);
+ /*
+ * Cleanup shared state
+ */
+
+ sf = f->shr;
+ fss = fsh_slice_get (fsh, sf->slice_index);
+ pfss = fs_slice_private_get (fs, sf->slice_index);
+
+ /* Free fifo chunks */
+ fsh_slice_collect_chunks (fsh, fss, fs_chunk_ptr (fsh, f->shr->start_chunk));
+
+ sf->start_chunk = sf->end_chunk = 0;
+ sf->head_chunk = sf->tail_chunk = 0;
+
+ /* Add to free list */
+ fss_fifo_free_list_push (fsh, fss, sf);
+
+ fss->virtual_mem -= svm_fifo_size (f);
+
+ /*
+ * Cleanup private state
+ */
/* Remove from active list. Only rx fifos are tracked */
if (f->flags & SVM_FIFO_F_LL_TRACKED)
{
- if (f->prev)
- f->prev->next = f->next;
- else
- fss->fifos = f->next;
- if (f->next)
- f->next->prev = f->prev;
+ pfss_fifo_del_active_list (pfss, f);
f->flags &= ~SVM_FIFO_F_LL_TRACKED;
}
- /* Add to free list */
- f->next = fss->free_fifos;
- f->prev = 0;
- fss->free_fifos = f;
-
- /* Free fifo chunks */
- fsh_slice_collect_chunks (fss, f->start_chunk);
-
- f->start_chunk = f->end_chunk = 0;
- f->head_chunk = f->tail_chunk = f->ooo_enq = f->ooo_deq = 0;
-
- /* not allocated on segment heap */
svm_fifo_free_chunk_lookup (f);
svm_fifo_free_ooo_data (f);
if (CLIB_DEBUG)
{
- f->master_session_index = ~0;
+ sf->master_session_index = ~0;
f->master_thread_index = ~0;
}
+ f->ooo_enq = f->ooo_deq = 0;
+ f->prev = 0;
+
+ fs_fifo_free (fs, f, f->shr->slice_index);
+
fsh_active_fifos_update (fsh, -1);
}
-int
-fifo_segment_prealloc_fifo_hdrs (fifo_segment_t * fs, u32 slice_index,
- u32 batch_size)
+void
+fifo_segment_free_client_fifo (fifo_segment_t *fs, svm_fifo_t *f)
+{
+ fs_fifo_free (fs, f, 0 /* clients attach fifos in slice 0 */);
+}
+
+void
+fifo_segment_detach_fifo (fifo_segment_t *fs, svm_fifo_t **f)
+{
+ fifo_slice_private_t *pfss;
+ fifo_segment_slice_t *fss;
+ svm_fifo_t *of = *f;
+ u32 slice_index;
+
+ slice_index = of->master_thread_index;
+ fss = fsh_slice_get (fs->h, slice_index);
+ pfss = fs_slice_private_get (fs, slice_index);
+ fss->virtual_mem -= svm_fifo_size (of);
+ if (of->flags & SVM_FIFO_F_LL_TRACKED)
+ pfss_fifo_del_active_list (pfss, of);
+
+ /* Collect chunks that were provided in return for those detached */
+ fsh_slice_collect_chunks (fs->h, fss, of->chunks_at_attach);
+ of->chunks_at_attach = 0;
+
+ /* Collect hdr that was provided in return for the detached */
+ fss_fifo_free_list_push (fs->h, fss, of->hdr_at_attach);
+ of->hdr_at_attach = 0;
+
+ clib_mem_bulk_free (pfss->fifos, *f);
+ *f = 0;
+}
+
+void
+fifo_segment_attach_fifo (fifo_segment_t *fs, svm_fifo_t **f, u32 slice_index)
+{
+ svm_fifo_chunk_t *c, *nc, *pc = 0;
+ fifo_slice_private_t *pfss;
+ fifo_segment_slice_t *fss;
+ svm_fifo_t *nf, *of;
+
+ nf = fs_fifo_alloc (fs, slice_index);
+ clib_memcpy_fast (nf, *f, sizeof (*nf));
+
+ fss = fsh_slice_get (fs->h, slice_index);
+ pfss = fs_slice_private_get (fs, slice_index);
+ fss->virtual_mem += svm_fifo_size (nf);
+ nf->next = nf->prev = 0;
+ if (nf->flags & SVM_FIFO_F_LL_TRACKED)
+ pfss_fifo_add_active_list (pfss, nf);
+
+ /* Allocate shared hdr and chunks to be collected at detach in return
+ * for those that are being attached now */
+ of = *f;
+ of->hdr_at_attach = fsh_try_alloc_fifo_hdr (fs->h, fss);
+
+ c = fs_chunk_ptr (fs->h, nf->shr->start_chunk);
+ of->chunks_at_attach = pc = fsh_try_alloc_chunk (fs->h, fss, c->length);
+
+ while ((c = fs_chunk_ptr (fs->h, c->next)))
+ {
+ nc = fsh_try_alloc_chunk (fs->h, fss, c->length);
+ pc->next = fs_chunk_sptr (fs->h, nc);
+ pc = nc;
+ }
+
+ nf->shr->slice_index = slice_index;
+ *f = nf;
+}
+
+uword
+fifo_segment_fifo_offset (svm_fifo_t *f)
+{
+ return (u8 *) f->shr - (u8 *) f->fs_hdr;
+}
+
+svm_fifo_chunk_t *
+fifo_segment_alloc_chunk_w_slice (fifo_segment_t *fs, u32 slice_index,
+ u32 chunk_size)
{
fifo_segment_header_t *fsh = fs->h;
fifo_segment_slice_t *fss;
- svm_fifo_t *f;
- void *oldheap;
- uword size;
- u8 *fmem;
- int i;
fss = fsh_slice_get (fsh, slice_index);
- size = (uword) (sizeof (*f)) * batch_size;
+ return fsh_try_alloc_chunk (fsh, fss, chunk_size);
+}
- oldheap = ssvm_push_heap (fsh->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);
+void
+fifo_segment_collect_chunk (fifo_segment_t *fs, u32 slice_index,
+ svm_fifo_chunk_t *c)
+{
+ fsh_collect_chunks (fs->h, slice_index, c);
+}
- /* Out of space.. */
- if (fmem == 0)
- return -1;
+uword
+fifo_segment_chunk_offset (fifo_segment_t *fs, svm_fifo_chunk_t *c)
+{
+ return (u8 *) c - (u8 *) fs->h;
+}
- /* Carve fifo + chunk space */
- for (i = 0; i < batch_size; i++)
+svm_msg_q_t *
+fifo_segment_msg_q_alloc (fifo_segment_t *fs, u32 mq_index,
+ svm_msg_q_cfg_t *cfg)
+{
+ fifo_segment_header_t *fsh = fs->h;
+ svm_msg_q_shared_t *smq;
+ svm_msg_q_t *mq;
+ void *base;
+ u32 size;
+
+ if (!fs->mqs)
{
- f = (svm_fifo_t *) fmem;
- memset (f, 0, sizeof (*f));
- f->next = fss->free_fifos;
- fss->free_fifos = f;
- fmem += sizeof (*f);
+ u32 n_mqs = clib_max (fs->h->n_mqs, 1);
+ vec_validate (fs->mqs, n_mqs - 1);
}
- fsh_free_bytes_sub (fsh, size);
+ size = svm_msg_q_size_to_alloc (cfg);
+ base = fsh_alloc_aligned (fsh, size, 8);
+ fsh->n_reserved_bytes += size;
- return 0;
+ smq = svm_msg_q_init (base, cfg);
+ mq = vec_elt_at_index (fs->mqs, mq_index);
+ svm_msg_q_attach (mq, smq);
+
+ return mq;
+}
+
+svm_msg_q_t *
+fifo_segment_msg_q_attach (fifo_segment_t *fs, uword offset, u32 mq_index)
+{
+ svm_msg_q_t *mq;
+
+ if (!fs->mqs)
+ {
+ u32 n_mqs = clib_max (fs->h->n_mqs, 1);
+ vec_validate (fs->mqs, n_mqs - 1);
+ }
+
+ mq = vec_elt_at_index (fs->mqs, mq_index);
+
+ if (!mq->q.shr)
+ {
+ svm_msg_q_shared_t *smq;
+ smq = (svm_msg_q_shared_t *) ((u8 *) fs->h + offset);
+ svm_msg_q_attach (mq, smq);
+ }
+
+ ASSERT (fifo_segment_msg_q_offset (fs, mq_index) == offset);
+
+ return mq;
+}
+
+void
+fifo_segment_msg_qs_discover (fifo_segment_t *fs, int *fds, u32 n_fds)
+{
+ svm_msg_q_shared_t *smq;
+ u32 n_mqs, size, i;
+ uword offset = 0, n_alloced;
+ svm_msg_q_t *mq;
+
+ n_mqs = fs->h->n_mqs;
+ if (n_fds && n_mqs != n_fds)
+ {
+ clib_warning ("expected %u fds got %u", n_mqs, n_fds);
+ return;
+ }
+
+ vec_validate (fs->mqs, n_mqs - 1);
+ n_alloced = fs->h->n_reserved_bytes - fs->h->start_byte_index;
+ ASSERT (n_alloced % n_mqs == 0);
+ size = n_alloced / n_mqs;
+
+ offset = fs->h->start_byte_index;
+ for (i = 0; i < n_mqs; i++)
+ {
+ mq = vec_elt_at_index (fs->mqs, i);
+ smq = (svm_msg_q_shared_t *) ((u8 *) fs->h + offset);
+ svm_msg_q_attach (mq, smq);
+ if (n_fds)
+ svm_msg_q_set_eventfd (mq, fds[i]);
+ offset += size;
+ }
+}
+
+uword
+fifo_segment_msg_q_offset (fifo_segment_t *fs, u32 mq_index)
+{
+ svm_msg_q_t *mq = vec_elt_at_index (fs->mqs, mq_index);
+
+ if (mq->q.shr == 0)
+ return ~0ULL;
+
+ return (uword) ((u8 *) mq->q.shr - (u8 *) fs->h) -
+ sizeof (svm_msg_q_shared_t);
+}
+
+int
+fifo_segment_prealloc_fifo_hdrs (fifo_segment_t * fs, u32 slice_index,
+ u32 batch_size)
+{
+ fifo_segment_header_t *fsh = fs->h;
+ fifo_segment_slice_t *fss;
+
+ fss = fsh_slice_get (fsh, slice_index);
+ return fsh_try_alloc_fifo_hdr_batch (fsh, fss, batch_size);
}
int
u32 chunk_size, u32 batch_size)
{
fifo_segment_header_t *fsh = fs->h;
- u32 rounded_data_size, fl_index;
fifo_segment_slice_t *fss;
- svm_fifo_chunk_t *c;
- void *oldheap;
- uword size;
- u8 *cmem;
- int i;
+ u32 fl_index;
if (!fs_chunk_size_is_valid (fsh, chunk_size))
{
}
fl_index = fs_freelist_for_size (chunk_size);
- rounded_data_size = fs_freelist_index_to_size (fl_index);
- size = (uword) (sizeof (*c) + rounded_data_size) * batch_size;
-
- oldheap = ssvm_push_heap (fsh->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;
-
fss = fsh_slice_get (fsh, slice_index);
- /* 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 = fss->free_chunks[fl_index];
- fss->free_chunks[fl_index] = c;
- cmem += sizeof (*c) + rounded_data_size;
- }
-
- fss->n_fl_chunk_bytes += batch_size * rounded_data_size;
- fsh_free_bytes_sub (fsh, size);
-
- return 0;
+ return fsh_try_alloc_chunk_batch (fsh, fss, fl_index, batch_size);
}
/**
/* Calculate space requirements */
pair_size = 2 * hdrs + rx_rounded_data_size + tx_rounded_data_size;
- space_available = fsh_free_space (fsh);
+ space_available = fsh_n_free_bytes (fsh);
pairs_to_alloc = space_available / pair_size;
pairs_to_alloc = clib_min (pairs_to_alloc, *n_fifo_pairs);
pairs_per_slice = pairs_to_alloc / fs->n_slices;
for (i = 0; i < fs->n_slices; i++)
{
- fss = fsh_slice_get (fsh, i);
alloc_now = clib_min (pairs_per_slice, *n_fifo_pairs);
+ if (0 == alloc_now)
+ break;
+
+ fss = fsh_slice_get (fsh, i);
if (fs_try_alloc_fifo_batch (fsh, fss, rx_fl_index, alloc_now))
clib_warning ("rx prealloc failed: pairs %u", alloc_now);
if (fs_try_alloc_fifo_batch (fsh, fss, tx_fl_index, alloc_now))
u32
fifo_segment_num_fifos (fifo_segment_t * fs)
{
- return clib_atomic_load_relax_n (&fs->h->n_active_fifos);
+ return fsh_n_active_fifos (fs->h);
}
static u32
-fs_slice_num_free_fifos (fifo_segment_slice_t * fss)
+fs_slice_num_free_fifos (fifo_segment_header_t *fsh, fifo_segment_slice_t *fss)
{
- svm_fifo_t *f;
+ svm_fifo_shared_t *f;
u32 count = 0;
- f = fss->free_fifos;
+ f = fs_ptr (fsh, fss->free_fifos);
if (f == 0)
return 0;
while (f)
{
- f = f->next;
+ f = fs_ptr (fsh, f->next);
count++;
}
return count;
for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
{
fss = fsh_slice_get (fsh, slice_index);
- count += fs_slice_num_free_fifos (fss);
+ count += fs_slice_num_free_fifos (fsh, fss);
}
return count;
}
static u32
-fs_slice_num_free_chunks (fifo_segment_slice_t * fss, u32 size)
+fs_slice_num_free_chunks (fifo_segment_header_t *fsh,
+ fifo_segment_slice_t *fss, u32 size)
{
u32 count = 0, rounded_size, fl_index;
svm_fifo_chunk_t *c;
/* Count all free chunks? */
if (size == ~0)
{
- for (i = 0; i < vec_len (fss->free_chunks); i++)
+ for (i = 0; i < FS_CHUNK_VEC_LEN; i++)
{
- c = fss->free_chunks[i];
+ c = fss_chunk_free_list_head (fsh, fss, i);
if (c == 0)
continue;
while (c)
{
- c = c->next;
+ c = fs_chunk_ptr (fsh, c->next);
count++;
}
}
rounded_size = (1 << (max_log2 (size)));
fl_index = fs_freelist_for_size (rounded_size);
- if (fl_index >= vec_len (fss->free_chunks))
+ if (fl_index >= FS_CHUNK_VEC_LEN)
return 0;
- c = fss->free_chunks[fl_index];
+ c = fss_chunk_free_list_head (fsh, fss, fl_index);
if (c == 0)
return 0;
while (c)
{
- c = c->next;
+ c = fs_chunk_ptr (fsh, c->next);
count++;
}
return count;
for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
{
fss = fsh_slice_get (fsh, slice_index);
- count += fs_slice_num_free_chunks (fss, size);
+ count += fs_slice_num_free_chunks (fsh, fss, size);
}
return count;
}
+uword
+fifo_segment_size (fifo_segment_t * fs)
+{
+ return fs->h->max_byte_index - fs->h->n_reserved_bytes;
+}
+
+u8
+fsh_has_reached_mem_limit (fifo_segment_header_t * fsh)
+{
+ return (fsh->flags & FIFO_SEGMENT_F_MEM_LIMIT) ? 1 : 0;
+}
+
void
-fifo_segment_update_free_bytes (fifo_segment_t * fs)
+fsh_reset_mem_limit (fifo_segment_header_t * fsh)
+{
+ fsh->flags &= ~FIFO_SEGMENT_F_MEM_LIMIT;
+}
+
+void *
+fifo_segment_alloc (fifo_segment_t *fs, uword size)
{
- fsh_update_free_bytes (fs->h);
+ void *rv = fsh_alloc (fs->h, size);
+ /* Mark externally allocated bytes as reserved. This helps
+ * @ref fifo_segment_size report bytes used only for fifos */
+ fs->h->n_reserved_bytes += size;
+ return rv;
}
uword
return fsh_n_free_bytes (fs->h);
}
+uword
+fifo_segment_cached_bytes (fifo_segment_t * fs)
+{
+ return fsh_n_cached_bytes (fs->h);
+}
+
+uword
+fifo_segment_available_bytes (fifo_segment_t * fs)
+{
+ return fsh_n_free_bytes (fs->h) + fsh_n_cached_bytes (fs->h);
+}
+
uword
fifo_segment_fl_chunk_bytes (fifo_segment_t * fs)
{
for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
{
fss = fsh_slice_get (fsh, slice_index);
- n_bytes += fss->n_fl_chunk_bytes;
+ n_bytes += fss_fl_chunk_bytes (fss);
}
return n_bytes;
u8
fifo_segment_has_fifos (fifo_segment_t * fs)
{
- fifo_segment_header_t *fsh = fs->h;
- fifo_segment_slice_t *fss;
- int slice_index;
+ return (fsh_n_active_fifos (fs->h) != 0);
+}
- for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
+svm_fifo_t *
+fifo_segment_get_slice_fifo_list (fifo_segment_t * fs, u32 slice_index)
+{
+ fifo_slice_private_t *pfss;
+
+ pfss = fs_slice_private_get (fs, slice_index);
+ return pfss->active_fifos;
+}
+
+u8
+fifo_segment_get_mem_usage (fifo_segment_t * fs)
+{
+ uword size, in_use;
+
+ size = fifo_segment_size (fs);
+ in_use =
+ size - fifo_segment_free_bytes (fs) - fifo_segment_cached_bytes (fs);
+ return (in_use * 100) / size;
+}
+
+fifo_segment_mem_status_t
+fifo_segment_determine_status (fifo_segment_header_t * fsh, u8 usage)
+{
+ if (!fsh->high_watermark || !fsh->low_watermark)
+ return MEMORY_PRESSURE_NO_PRESSURE;
+
+ /* once the no-memory is detected, the status continues
+ * until memory usage gets below the high watermark
+ */
+ if (fsh_has_reached_mem_limit (fsh))
{
- fss = fsh_slice_get (fsh, slice_index);
- if (fss->fifos)
- return 1;
+ if (usage >= fsh->high_watermark)
+ return MEMORY_PRESSURE_NO_MEMORY;
+ else
+ fsh_reset_mem_limit (fsh);
}
- return 0;
+
+ if (usage >= fsh->high_watermark)
+ return MEMORY_PRESSURE_HIGH_PRESSURE;
+
+ else if (usage >= fsh->low_watermark)
+ return MEMORY_PRESSURE_LOW_PRESSURE;
+
+ return MEMORY_PRESSURE_NO_PRESSURE;
}
-svm_fifo_t *
-fifo_segment_get_slice_fifo_list (fifo_segment_t * fs, u32 slice_index)
+fifo_segment_mem_status_t
+fifo_segment_get_mem_status (fifo_segment_t * fs)
{
fifo_segment_header_t *fsh = fs->h;
- fifo_segment_slice_t *fss;
+ u8 usage = fifo_segment_get_mem_usage (fs);
- fss = fsh_slice_get (fsh, slice_index);
- return fss->fifos;
+ return fifo_segment_determine_status (fsh, usage);
}
u8 *
ssvm_segment_type_t st = ssvm_type (&sp->ssvm);
if (st == SSVM_SEGMENT_PRIVATE)
- s = format (s, "%s", "private-heap");
+ s = format (s, "%s", "private");
else if (st == SSVM_SEGMENT_MEMFD)
s = format (s, "%s", "memfd");
else if (st == SSVM_SEGMENT_SHM)
u8 *
format_fifo_segment (u8 * s, va_list * args)
{
- u32 count, indent, active_fifos, free_fifos, fifo_hdr = 0;
+ u32 count, indent, active_fifos, free_fifos;
fifo_segment_t *fs = va_arg (*args, fifo_segment_t *);
int verbose __attribute__ ((unused)) = va_arg (*args, int);
uword est_chunk_bytes, est_free_seg_bytes, free_chunks;
uword chunk_bytes = 0, free_seg_bytes, chunk_size;
+ uword tracked_cached_bytes;
+ uword fifo_hdr = 0, reserved;
fifo_segment_header_t *fsh;
fifo_segment_slice_t *fss;
svm_fifo_chunk_t *c;
char *address;
size_t size;
int i;
+ uword allocated, in_use, virt;
+ f64 usage;
+ fifo_segment_mem_status_t mem_st;
indent = format_get_indent (s) + 2;
if (fs == 0)
{
- s = format (s, "%-15s%15s%15s%15s%15s%15s", "Name", "Type",
+ s = format (s, "%-20s%10s%15s%15s%15s%15s", "Name", "Type",
"HeapSize (M)", "ActiveFifos", "FreeFifos", "Address");
return s;
}
active_fifos = fifo_segment_num_fifos (fs);
free_fifos = fifo_segment_num_free_fifos (fs);
- s = format (s, "%-15v%15U%15llu%15u%15u%15llx", ssvm_name (&fs->ssvm),
+ s = format (s, "%-20v%10U%15llu%15u%15u%15llx", ssvm_name (&fs->ssvm),
format_fifo_segment_type, fs, size >> 20ULL, active_fifos,
free_fifos, address);
free_chunks = fifo_segment_num_free_chunks (fs, ~0);
if (free_chunks)
- s = format (s, "\n\n%UFree chunks by size:\n", format_white_space,
- indent + 2);
+ s =
+ format (s, "\n\n%UFree/Allocated chunks by size:\n", format_white_space,
+ indent + 2);
else
s = format (s, "\n");
for (slice_index = 0; slice_index < fs->n_slices; slice_index++)
{
fss = fsh_slice_get (fsh, slice_index);
- for (i = 0; i < vec_len (fss->free_chunks); i++)
+ for (i = 0; i < FS_CHUNK_VEC_LEN; i++)
{
- c = fss->free_chunks[i];
- if (c == 0)
+ c = fss_chunk_free_list_head (fsh, fss, i);
+ if (c == 0 && fss->num_chunks[i] == 0)
continue;
count = 0;
while (c)
{
- c = c->next;
+ c = fs_chunk_ptr (fsh, c->next);
count++;
}
chunk_size = fs_freelist_index_to_size (i);
- s = format (s, "%U%-5u kB: %u\n", format_white_space, indent + 2,
- chunk_size >> 10, count);
+ s = format (s, "%U%-5u kB: %u/%u\n", format_white_space, indent + 2,
+ chunk_size >> 10, count, fss->num_chunks[i]);
chunk_bytes += count * chunk_size;
}
fifo_hdr = free_fifos * sizeof (svm_fifo_t);
est_chunk_bytes = fifo_segment_fl_chunk_bytes (fs);
est_free_seg_bytes = fifo_segment_free_bytes (fs);
- fifo_segment_update_free_bytes (fs);
free_seg_bytes = fifo_segment_free_bytes (fs);
-
- s = format (s, "\n%Useg free bytes: %U (%lu) estimated: %U (%lu)\n",
- format_white_space, indent + 2, format_memory_size,
- free_seg_bytes, free_seg_bytes, format_memory_size,
- est_free_seg_bytes, est_free_seg_bytes);
- s = format (s, "%Uchunk free bytes: %U (%lu) estimated: %U (%lu)\n",
- format_white_space, indent + 2, format_memory_size, chunk_bytes,
- chunk_bytes, format_memory_size, est_chunk_bytes,
- est_chunk_bytes);
- s = format (s, "%Ufifo hdr free bytes: %U (%u) reserved %U (%lu)\n",
- format_white_space, indent + 2, format_memory_size, fifo_hdr,
- fifo_hdr, format_memory_size, fsh->n_reserved_bytes,
- fsh->n_reserved_bytes);
+ tracked_cached_bytes = fifo_segment_cached_bytes (fs);
+ allocated = fifo_segment_size (fs);
+ in_use = fifo_segment_size (fs) - est_free_seg_bytes - tracked_cached_bytes;
+ usage = (100.0 * in_use) / allocated;
+ mem_st = fifo_segment_get_mem_status (fs);
+ virt = fsh_virtual_mem (fsh);
+ reserved = fsh->n_reserved_bytes;
+
+ s = format (s, "\n%Useg free bytes: %U (%lu) estimated: %U (%lu) reserved:"
+ " %U (%lu)\n", format_white_space, indent + 2,
+ format_memory_size, free_seg_bytes, free_seg_bytes,
+ format_memory_size, est_free_seg_bytes, est_free_seg_bytes,
+ format_memory_size, reserved, reserved);
+ s = format (s, "%Uchunk free bytes: %U (%lu) estimated: %U (%lu) tracked:"
+ " %U (%lu)\n", format_white_space, indent + 2,
+ format_memory_size, chunk_bytes, chunk_bytes,
+ format_memory_size, est_chunk_bytes, est_chunk_bytes,
+ format_memory_size, tracked_cached_bytes, tracked_cached_bytes);
+ s = format (s, "%Ufifo active: %u hdr free: %u bytes: %U (%u) \n",
+ format_white_space, indent + 2, fsh->n_active_fifos, free_fifos,
+ format_memory_size, fifo_hdr, fifo_hdr);
+ s = format (s, "%Usegment usage: %.2f%% (%U / %U) virt: %U status: %s\n",
+ format_white_space, indent + 2, usage, format_memory_size,
+ in_use, format_memory_size, allocated, format_memory_size, virt,
+ fifo_segment_mem_status_strings[mem_st]);
s = format (s, "\n");
return s;
Code Review / vpp.git / blobdiff