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net: new counter for tx_timeout errors in sysfs

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This adds the /sys/class/net/DEV/queues/Q/tx_timeout attribute
containing the total number of timeout events on the given queue. It
is always available with CONFIG_SYSFS, independently of
CONFIG_RPS/XPS.

Credits to Stephen Hemminger for a preliminary version of this patch.

Tested:
  without CONFIG_SYSFS (compilation only)
  with sysfs and without CONFIG_RPS & CONFIG_XPS
  with sysfs and without CONFIG_RPS
  with sysfs and without CONFIG_XPS
  with defaults

Signed-off-by: David Decotigny <david.decotigny@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
david decotigny
2011-11-16 12:15:10 +00:00
committed by David S. Miller
parent 19b05f8113
commit ccf5ff69fb
3 changed files with 42 additions and 8 deletions
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12
include/linux/netdevice.h
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@@ -532,7 +532,7 @@ struct netdev_queue {
struct Qdisc *qdisc;
unsigned long state;
struct Qdisc *qdisc_sleeping;
#if defined(CONFIG_RPS) || defined(CONFIG_XPS)
#ifdef CONFIG_SYSFS
struct kobject kobj;
#endif
#if defined(CONFIG_XPS) && defined(CONFIG_NUMA)
@@ -547,6 +547,12 @@ struct netdev_queue {
* please use this field instead of dev->trans_start
*/
unsigned long trans_start;
/*
* Number of TX timeouts for this queue
* (/sys/class/net/DEV/Q/trans_timeout)
*/
unsigned long trans_timeout;
} ____cacheline_aligned_in_smp;
static inline int netdev_queue_numa_node_read(const struct netdev_queue *q)
@@ -1109,9 +1115,11 @@ struct net_device {
unsigned char broadcast[MAX_ADDR_LEN]; /* hw bcast add */
#if defined(CONFIG_RPS) || defined(CONFIG_XPS)
#ifdef CONFIG_SYSFS
struct kset *queues_kset;
#endif
#ifdef CONFIG_RPS
struct netdev_rx_queue *_rx;
/* Number of RX queues allocated at register_netdev() time */