#include <svm/fifo_segment.h>
+static char *fifo_segment_mem_status_strings[] = {
+#define _(sym,str) str,
+ foreach_segment_mem_status
+#undef _
+};
+
/**
* Fifo segment free space
*
clib_atomic_store_rel_n (&fsh->n_free_bytes, fsh_free_space (fsh));
}
+static inline void
+fsh_cached_bytes_add (fifo_segment_header_t * fsh, int size)
+{
+ clib_atomic_fetch_add_rel (&fsh->n_cached_bytes, size);
+}
+
+static inline void
+fsh_cached_bytes_sub (fifo_segment_header_t * fsh, int 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);
+ ASSERT (n_cached >= 0);
+ return n_cached;
+}
+
static void
fsh_check_mem (fifo_segment_header_t * fsh)
{
ssvm_pop_heap (oldheap);
fsh->n_free_bytes = fsh_free_space (fsh);
+ fsh->n_cached_bytes = 0;
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;
c->next = fss->free_chunks[fl_index];
fss->free_chunks[fl_index] = c;
fss->n_fl_chunk_bytes += fl_size;
+ n_alloc -= fl_size;
data_bytes += fl_size;
}
first = last = 0;
f->start_chunk = first;
f->end_chunk = last;
fss->n_fl_chunk_bytes -= n_alloc;
+ fsh_cached_bytes_sub (fsh, n_alloc);
return f;
}
}
fss->n_fl_chunk_bytes += batch_size * rounded_data_size;
+ fsh_cached_bytes_add (fsh, batch_size * rounded_data_size);
fsh_free_bytes_sub (fsh, size);
return 0;
{
f = fs_try_alloc_fifo_freelist (fss, fl_index, data_bytes);
if (f)
- goto done;
+ {
+ fsh_cached_bytes_sub (fsh, fs_freelist_index_to_size (fl_index));
+ goto done;
+ }
}
fsh_check_mem (fsh);
goto done;
f = fs_try_alloc_fifo_freelist (fss, fl_index, data_bytes);
+ if (f)
+ fsh_cached_bytes_sub (fsh, fs_freelist_index_to_size (fl_index));
goto done;
}
if (fifo_sz <= n_free_bytes)
fss->free_chunks[fl_index] = c->next;
c->next = 0;
fss->n_fl_chunk_bytes -= fs_freelist_index_to_size (fl_index);
+ fsh_cached_bytes_sub (fsh, fs_freelist_index_to_size (fl_index));
}
done:
}
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 * cur)
{
svm_fifo_chunk_t *next;
int fl_index;
+ u32 n_collect = 0;
clib_spinlock_lock (&fss->chunk_lock);
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);
+ n_collect += fs_freelist_index_to_size (fl_index);
cur = next;
}
+ fss->n_fl_chunk_bytes += n_collect;
+ fsh_cached_bytes_add (fsh, n_collect);
+
clib_spinlock_unlock (&fss->chunk_lock);
}
{
fifo_segment_slice_t *fss;
fss = fsh_slice_get (fsh, slice_index);
- fsh_slice_collect_chunks (fss, cur);
+ fsh_slice_collect_chunks (fsh, fss, cur);
}
/**
fss->free_fifos = f;
/* Free fifo chunks */
- fsh_slice_collect_chunks (fss, f->start_chunk);
+ fsh_slice_collect_chunks (fsh, fss, f->start_chunk);
f->start_chunk = f->end_chunk = 0;
f->head_chunk = f->tail_chunk = f->ooo_enq = f->ooo_deq = 0;
c->next = fss->free_chunks[fl_index];
fss->free_chunks[fl_index] = c;
cmem += sizeof (*c) + rounded_data_size;
+ fsh_cached_bytes_add (fsh, rounded_data_size);
}
fss->n_fl_chunk_bytes += batch_size * rounded_data_size;
fsh_update_free_bytes (fs->h);
}
+uword
+fifo_segment_size (fifo_segment_t * fs)
+{
+ return fs->ssvm.ssvm_size;
+}
+
+u8
+fsh_has_reached_mem_limit (fifo_segment_header_t * fsh)
+{
+ return (fsh->flags & FIFO_SEGMENT_F_MEM_LIMIT) ? 1 : 0;
+}
+
+void
+fsh_reset_mem_limit (fifo_segment_header_t * fsh)
+{
+ fsh->flags &= ~FIFO_SEGMENT_F_MEM_LIMIT;
+}
+
uword
fifo_segment_free_bytes (fifo_segment_t * fs)
{
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_fl_chunk_bytes (fifo_segment_t * fs)
{
return fss->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))
+ {
+ if (usage >= fsh->high_watermark)
+ return MEMORY_PRESSURE_NO_MEMORY;
+ else
+ fsh_reset_mem_limit (fsh);
+ }
+
+ 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;
+}
+
+fifo_segment_mem_status_t
+fifo_segment_get_mem_status (fifo_segment_t * fs)
+{
+ fifo_segment_header_t *fsh = fs->h;
+ u8 usage = fifo_segment_get_mem_usage (fs);
+
+ return fifo_segment_determine_status (fsh, usage);
+}
+
u8 *
format_fifo_segment_type (u8 * s, va_list * args)
{
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;
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;
+ f64 usage;
+ fifo_segment_mem_status_t mem_st;
indent = format_get_indent (s) + 2;
est_free_seg_bytes = fifo_segment_free_bytes (fs);
fifo_segment_update_free_bytes (fs);
free_seg_bytes = fifo_segment_free_bytes (fs);
+ 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);
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);
+ 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 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);
+ s =
+ format (s, "%Usegment usage: %.2f%% (%U / %U) %s\n", format_white_space,
+ indent + 2, usage, format_memory_size, in_use, format_memory_size,
+ allocated, fifo_segment_mem_status_strings[mem_st]);
s = format (s, "\n");
return s;
Code Review / vpp.git / blobdiff