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authorWillem de Bruijn <willemb@google.com>2014-08-04 22:11:48 -0400
committerDavid S. Miller <davem@davemloft.net>2014-08-05 16:35:54 -0700
commite7fd2885385157d46c85f282fc6d7d297db43e1f (patch)
tree14e9d00ed87b2b45882c8cb8dd1b9b4d221724f8 /include/uapi/linux/errqueue.h
parent09c2d251b70723650ba47e83571ff49281320f7c (diff)
net-timestamp: SCHED timestamp on entering packet scheduler
Kernel transmit latency is often incurred in the packet scheduler. Introduce a new timestamp on transmission just before entering the scheduler. When data travels through multiple devices (bonding, tunneling, ...) each device will export an individual timestamp. Signed-off-by: Willem de Bruijn <willemb@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'include/uapi/linux/errqueue.h')
-rw-r--r--include/uapi/linux/errqueue.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/uapi/linux/errqueue.h b/include/uapi/linux/errqueue.h
index accee72cae7c..17437cf297b7 100644
--- a/include/uapi/linux/errqueue.h
+++ b/include/uapi/linux/errqueue.h
@@ -39,6 +39,7 @@ struct scm_timestamping {
*/
enum {
SCM_TSTAMP_SND, /* driver passed skb to NIC, or HW */
+ SCM_TSTAMP_SCHED, /* data entered the packet scheduler */
};
#endif /* _UAPI_LINUX_ERRQUEUE_H */