stats: refactor

Type: refactor
Change-Id: Ifd533a095d979dc55bfbe5fac7e0b7510a4d900c
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 68 insertions, 0 deletions

diff --git a/src/vlib/stats/provider_mem.c b/src/vlib/stats/provider_mem.c
new file mode 100644
index 00000000000..d52ea4aa0e5
--- /dev/null
+++ b/src/vlib/stats/provider_mem.c
@@ -0,0 +1,68 @@
+/* SPDX-License-Identifier: Apache-2.0
+ * Copyright(c) 2022 Cisco Systems, Inc.
+ */
+
+#include <vlib/vlib.h>
+#include <vlib/unix/unix.h>
+#include <vlib/stats/stats.h>
+
+static clib_mem_heap_t **memory_heaps_vec;
+
+enum
+{
+  STAT_MEM_TOTAL = 0,
+  STAT_MEM_USED,
+  STAT_MEM_FREE,
+  STAT_MEM_USED_MMAP,
+  STAT_MEM_TOTAL_ALLOC,
+  STAT_MEM_FREE_CHUNKS,
+  STAT_MEM_RELEASABLE,
+} stat_mem_usage_e;
+
+/*
+ * Called from the stats periodic process to update memory counters.
+ */
+static void
+stat_provider_mem_usage_update_fn (vlib_stats_collector_data_t *d)
+{
+  clib_mem_usage_t usage;
+  clib_mem_heap_t *heap;
+  counter_t **counters = d->entry->data;
+  counter_t *cb;
+
+  heap = vec_elt (memory_heaps_vec, d->private_data);
+  clib_mem_get_heap_usage (heap, &usage);
+  cb = counters[0];
+  cb[STAT_MEM_TOTAL] = usage.bytes_total;
+  cb[STAT_MEM_USED] = usage.bytes_used;
+  cb[STAT_MEM_FREE] = usage.bytes_free;
+  cb[STAT_MEM_USED_MMAP] = usage.bytes_used_mmap;
+  cb[STAT_MEM_TOTAL_ALLOC] = usage.bytes_max;
+  cb[STAT_MEM_FREE_CHUNKS] = usage.bytes_free_reclaimed;
+  cb[STAT_MEM_RELEASABLE] = usage.bytes_overhead;
+}
+
+/*
+ * Provide memory heap counters.
+ * Two dimensional array of heap index and per-heap gauges.
+ */
+void
+vlib_stats_register_mem_heap (clib_mem_heap_t *heap)
+{
+  vlib_stats_collector_reg_t r = {};
+  u32 idx;
+
+  vec_add1 (memory_heaps_vec, heap);
+
+  r.entry_index = idx = vlib_stats_add_counter_vector ("/mem/%s", heap->name);
+  vlib_stats_validate_counter_vector (idx, STAT_MEM_RELEASABLE);
+
+  /* Create symlink */
+  vlib_stats_add_symlink (idx, STAT_MEM_TOTAL, "/mem/%s/used", heap->name);
+  vlib_stats_add_symlink (idx, STAT_MEM_USED, "/mem/%s/total", heap->name);
+  vlib_stats_add_symlink (idx, STAT_MEM_FREE, "/mem/%s/free", heap->name);
+
+  r.private_data = vec_len (memory_heaps_vec) - 1;
+  r.collect_fn = stat_provider_mem_usage_update_fn;
+  vlib_stats_register_collector_fn (&r);
+}