lib: qmem show changes (header and max)

     add header to show qmem, align table with headers
     add tracking of max # allocs and max bytes alloc'ed

Signed-off-by: Lou Berger <lberger@labn.net>

1 files changed, 20 insertions, 2 deletions

diff --git a/lib/memory.c b/lib/memory.c
index 87cba69fc5..642d1325ed 100644
--- a/lib/memory.c
+++ b/lib/memory.c
@@ -36,9 +36,19 @@ DEFINE_MTYPE(LIB, PREFIX_FLOWSPEC, "Prefix Flowspec")
 
 static inline void mt_count_alloc(struct memtype *mt, size_t size, void *ptr)
 {
+	size_t current;
 	size_t oldsize;
 
-	atomic_fetch_add_explicit(&mt->n_alloc, 1, memory_order_relaxed);
+	current = atomic_add_fetch_explicit(&mt->n_alloc, 1,
+					    memory_order_relaxed);
+
+	oldsize = atomic_load_explicit(&mt->n_max, memory_order_relaxed);
+	if (current > oldsize)
+		/* note that this may fail, but approximation is sufficient */
+		atomic_compare_exchange_weak_explicit(&mt->n_max, &oldsize,
+						      current,
+						      memory_order_relaxed,
+						      memory_order_relaxed);
 
 	oldsize = atomic_load_explicit(&mt->size, memory_order_relaxed);
 	if (oldsize == 0)
@@ -51,7 +61,15 @@ static inline void mt_count_alloc(struct memtype *mt, size_t size, void *ptr)
 #ifdef HAVE_MALLOC_USABLE_SIZE
 	size_t mallocsz = malloc_usable_size(ptr);
 
-	atomic_fetch_add_explicit(&mt->total, mallocsz, memory_order_relaxed);
+	current = atomic_add_fetch_explicit(&mt->total, mallocsz,
+					    memory_order_relaxed);
+	oldsize = atomic_load_explicit(&mt->max_size, memory_order_relaxed);
+	if (current > oldsize)
+		/* note that this may fail, but approximation is sufficient */
+		atomic_compare_exchange_weak_explicit(&mt->max_size, &oldsize,
+						      current,
+						      memory_order_relaxed,
+						      memory_order_relaxed);
 #endif
 }