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netdev: Add queue stats for TX stop and wake 

TX queue stop and wake are counted by some drivers.
Support reporting these via netdev-genl queue stats.

Signed-off-by: Daniel Jurgens <danielj@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Reviewed-by: Jason Xing <kerneljasonxing@gmail.com>
Link: https://lore.kernel.org/r/20240510201927.1821109-2-danielj@nvidia.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
This commit is contained in:
Daniel Jurgens 2024-05-10 23:19:26 +03:00 committed by Jakub Kicinski
parent c084ebd77a
commit b56035101e
5 changed files with 24 additions and 1 deletions
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14
Documentation/netlink/specs/netdev.yaml
View File

@ -439,6 +439,20 @@ attribute-sets:
Number of the packets dropped by the device due to the transmit
packets bitrate exceeding the device rate limit.
type: uint
-
name: tx-stop
doc: |
Number of times driver paused accepting new tx packets
from the stack to this queue, because the queue was full.
Note that if BQL is supported and enabled on the device
the networking stack will avoid queuing a lot of data at once.
type: uint
-
name: tx-wake
doc: |
Number of times driver re-started accepting send
requests to this queue from the stack.
type: uint
operations:
list:

3
include/net/netdev_queues.h
View File

@ -41,6 +41,9 @@ struct netdev_queue_stats_tx {
u64 hw_gso_wire_bytes;
u64 hw_drop_ratelimits;
u64 stop;
u64 wake;
};
/**

2
include/uapi/linux/netdev.h
View File

@ -165,6 +165,8 @@ enum {
NETDEV_A_QSTATS_TX_HW_GSO_WIRE_PACKETS,
NETDEV_A_QSTATS_TX_HW_GSO_WIRE_BYTES,
NETDEV_A_QSTATS_TX_HW_DROP_RATELIMITS,
NETDEV_A_QSTATS_TX_STOP,
NETDEV_A_QSTATS_TX_WAKE,
__NETDEV_A_QSTATS_MAX,
NETDEV_A_QSTATS_MAX = (__NETDEV_A_QSTATS_MAX - 1)

4
net/core/netdev-genl.c
View File

@ -517,7 +517,9 @@ netdev_nl_stats_write_tx(struct sk_buff *rsp, struct netdev_queue_stats_tx *tx)
netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_HW_GSO_BYTES, tx->hw_gso_bytes) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_HW_GSO_WIRE_PACKETS, tx->hw_gso_wire_packets) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_HW_GSO_WIRE_BYTES, tx->hw_gso_wire_bytes) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_HW_DROP_RATELIMITS, tx->hw_drop_ratelimits))
netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_HW_DROP_RATELIMITS, tx->hw_drop_ratelimits) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_STOP, tx->stop) ||
netdev_stat_put(rsp, NETDEV_A_QSTATS_TX_WAKE, tx->wake))
return -EMSGSIZE;
return 0;
}

2
tools/include/uapi/linux/netdev.h
View File

@ -165,6 +165,8 @@ enum {
NETDEV_A_QSTATS_TX_HW_GSO_WIRE_PACKETS,
NETDEV_A_QSTATS_TX_HW_GSO_WIRE_BYTES,
NETDEV_A_QSTATS_TX_HW_DROP_RATELIMITS,
NETDEV_A_QSTATS_TX_STOP,
NETDEV_A_QSTATS_TX_WAKE,
__NETDEV_A_QSTATS_MAX,
NETDEV_A_QSTATS_MAX = (__NETDEV_A_QSTATS_MAX - 1)