Francis Yan b0f71bd3e1 tcp: instrument how long TCP is limited by insufficient send buffer ... This patch measures the amount of time when TCP runs out of new data to send to the network due to insufficient send buffer, while TCP is still busy delivering (i.e. write queue is not empty). The goal is to indicate either the send buffer autotuning or user SO_SNDBUF setting has resulted network under-utilization. The measurement starts conservatively by checking various conditions to minimize false claims (i.e. under-estimation is more likely). The measurement stops when the SOCK_NOSPACE flag is cleared. But it does not account the time elapsed till the next application write. Also the measurement only starts if the sender is still busy sending data, s.t. the limit accounted is part of the total busy time. Signed-off-by: Francis Yan <francisyyan@gmail.com> Signed-off-by: Yuchung Cheng <ycheng@google.com> Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com> Acked-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>		2016-11-30 10:04:24 -05:00
..
6lowpan	6lowpan: ndisc: no overreact if no short address is available	2016-09-19 20:19:34 +02:00
9p	IB/core: add support to create a unsafe global rkey to ib_create_pd	2016-09-23 13:47:44 -04:00
802	net: use core MTU range checking in misc drivers	2016-10-20 14:51:10 -04:00
8021q	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
appletalk	appletalk: use IS_ENABLED() instead of checking for built-in or module	2016-09-10 21:19:10 -07:00
atm	net: remove MTU limits on a few ether_setup callers	2016-10-21 13:57:50 -04:00
ax25	AX.25: Close socket connection on session completion	2016-06-18 20:55:34 -07:00
batman-adv	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-11-22 13:27:16 -05:00
bluetooth	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-11-26 23:42:21 -05:00
bridge	bridge: mcast: add MLDv2 querier support	2016-11-21 13:16:58 -05:00
caif	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
can	can: bcm: fix support for CAN FD frames	2016-11-23 15:22:18 +01:00
ceph	libceph: initialize last_linger_id with a large integer	2016-11-10 20:13:08 +01:00
core	bpf: reuse dev_is_mac_header_xmit for redirect	2016-11-27 20:38:47 -05:00
dcb
dccp	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-11-15 10:54:36 -05:00
decnet	net: fix sleeping for sk_wait_event()	2016-11-14 13:17:21 -05:00
dns_resolver
dsa	net: remove MTU limits on a few ether_setup callers	2016-10-21 13:57:50 -04:00
ethernet	net: make default TX queue length a defined constant	2016-11-07 20:15:55 -05:00
hsr	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-10-30 12:42:58 -04:00
ieee802154	genetlink: mark families as __ro_after_init	2016-10-27 16:16:09 -04:00
ipv4	tcp: instrument how long TCP is limited by insufficient send buffer	2016-11-30 10:04:24 -05:00
ipv6	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-11-26 23:42:21 -05:00
ipx
irda	genetlink: mark families as __ro_after_init	2016-10-27 16:16:09 -04:00
iucv	Subject: [PATCH] af_iucv: drop skbs rejected by filter	2016-10-12 01:56:04 -04:00
kcm	Merge branch 'work.splice_read' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs	2016-10-07 15:36:58 -07:00
key	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
l2tp	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-11-26 23:42:21 -05:00
l3mdev	net: ipv6: Remove l3mdev_get_saddr6	2016-09-10 23:12:53 -07:00
lapb	net/lapb: tuse %*ph to dump buffers	2016-05-29 22:33:25 -07:00
llc	net: fix sleeping for sk_wait_event()	2016-11-14 13:17:21 -05:00
mac80211	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-11-22 13:27:16 -05:00
mac802154	mac802154: use rate limited warnings for malformed frames	2016-09-19 20:19:34 +02:00
mpls	lwt: Remove unused len field	2016-10-23 17:45:01 -04:00
ncsi	net/ncsi: Improve HNCDSC AEN handler	2016-10-20 11:23:08 -04:00
netfilter	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
netlabel	genetlink: mark families as __ro_after_init	2016-10-27 16:16:09 -04:00
netlink	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-11-15 10:54:36 -05:00
netrom
nfc	genetlink: mark families as __ro_after_init	2016-10-27 16:16:09 -04:00
openvswitch	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
packet	af_packet: Use virtio_net_hdr_from_skb() directly.	2016-11-19 10:37:03 -05:00
phonet	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
qrtr
rds	netns: make struct pernet_operations::id unsigned int	2016-11-18 10:59:15 -05:00
rfkill
rose	rose: limit sk_filter trim to payload	2016-07-13 11:53:40 -07:00
rxrpc	udp: do fwd memory scheduling on dequeue	2016-11-07 13:24:41 -05:00
sched	bpf: reuse dev_is_mac_header_xmit for redirect	2016-11-27 20:38:47 -05:00
sctp	sctp: use new rhlist interface on sctp transport rhashtable	2016-11-16 23:22:17 -05:00
strparser	strparser: Propagate correct error code in strp_recv()	2016-10-12 01:51:49 -04:00
sunrpc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-11-22 13:27:16 -05:00
switchdev	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-10-30 12:42:58 -04:00
tipc	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-11-26 23:42:21 -05:00
unix	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-11-22 13:27:16 -05:00
vmw_vsock	VSOCK: add loopback to virtio_transport	2016-11-24 11:53:15 -05:00
wimax	genetlink: mark families as __ro_after_init	2016-10-27 16:16:09 -04:00
wireless	wireless-drivers-next patches for 4.10	2016-11-27 20:26:59 -05:00
x25	net: x25: remove null checks on arrays calling_ae and called_ae	2016-09-09 18:13:30 -07:00
xfrm	Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/klassert/ipsec-next	2016-10-28 13:26:27 -04:00
compat.c	packet: compat support for sock_fprog	2016-06-09 23:41:03 -07:00
Kconfig	strparser: Stream parser for messages	2016-08-17 19:36:23 -04:00
Makefile	strparser: Stream parser for messages	2016-08-17 19:36:23 -04:00
socket.c	Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net	2016-11-22 13:27:16 -05:00
sysctl_net.c	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace	2016-10-06 09:52:23 -07:00