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net: Keep track of number of free L2 buffers

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Print current number of free MAC buf count when allocating
or freeing mbufs.

Change-Id: I3c434671b28ac4b4d8c8d968899e891391d849d9
Signed-off-by: Jukka Rissanen <jukka.rissanen@linux.intel.com>
This commit is contained in:
Jukka Rissanen 2015-09-30 12:48:46 +03:00 • committed by Anas Nashif
commit 6dba9310d4
1 changed files with 39 additions and 3 deletions
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42
net/ip/net_buf.c
View file

@ -96,6 +96,7 @@ static inline const char *type2str(enum net_buf_type type)
#ifdef DEBUG_NET_BUFS
static int num_free_rx_bufs = NET_BUF_RX_SIZE;
static int num_free_tx_bufs = NET_BUF_TX_SIZE;
static int num_free_mbufs = NET_NUM_MAC_BUFS;
static inline void dec_free_rx_bufs(struct net_buf *buf)
{
@ -152,11 +153,41 @@ static inline int get_frees(enum net_buf_type type)
return 0xffffffff;
}
static inline void dec_free_mbufs(struct net_mbuf *buf)
{
if (!buf) {
return;
}
num_free_mbufs--;
if (num_free_mbufs < 0) {
NET_DBG("*** ERROR *** Invalid L2 buffer count.\n");
num_free_mbufs = 0;
}
}
static inline void inc_free_mbufs(struct net_mbuf *buf)
{
if (!buf) {
return;
}
num_free_mbufs++;
}
static inline int get_free_mbufs(void)
{
return num_free_mbufs;
}
#else
#define dec_free_rx_bufs(...)
#define inc_free_rx_bufs(...)
#define dec_free_tx_bufs(...)
#define inc_free_tx_bufs(...)
#define dec_free_mbufs(...)
#define inc_free_mbufs(...)
#define get_free_mbufs(...)
#endif
#ifdef DEBUG_NET_BUFS
@ -390,11 +421,14 @@ struct net_mbuf *net_mbuf_get_reserve(uint16_t reserve_head)
return NULL;
}
dec_free_mbufs(buf);
NET_BUF_CHECK_IF_IN_USE(buf);
#ifdef DEBUG_NET_BUFS
NET_DBG("buf %p reserve %u inuse %d (%s():%d)\n", buf, reserve_head,
buf->in_use, caller, line);
NET_DBG("[%d] buf %p reserve %u inuse %d (%s():%d)\n",
get_free_mbufs(), buf, reserve_head, buf->in_use,
caller, line);
#else
NET_DBG("buf %p reserve %u inuse %d\n", buf, reserve_head, buf->in_use);
#endif
@ -421,12 +455,14 @@ void net_mbuf_put(struct net_mbuf *buf)
NET_BUF_CHECK_IF_NOT_IN_USE(buf);
#ifdef DEBUG_NET_BUFS
NET_DBG("buf %p inuse %d (%s():%d)\n", buf, buf->in_use, caller, line);
NET_DBG("[%d] buf %p inuse %d (%s():%d)\n",
get_free_mbufs() + 1, buf, buf->in_use, caller, line);
#else
NET_DBG("buf %p inuse %d\n", buf, buf->in_use);
#endif
buf->in_use = false;
inc_free_mbufs(buf);
nano_fifo_put(&free_mbufs, buf);
}