Francis Yan 1c885808e4 tcp: SOF_TIMESTAMPING_OPT_STATS option for SO_TIMESTAMPING ... This patch exports the sender chronograph stats via the socket SO_TIMESTAMPING channel. Currently we can instrument how long a particular application unit of data was queued in TCP by tracking SOF_TIMESTAMPING_TX_SOFTWARE and SOF_TIMESTAMPING_TX_SCHED. Having these sender chronograph stats exported simultaneously along with these timestamps allow further breaking down the various sender limitation. For example, a video server can tell if a particular chunk of video on a connection takes a long time to deliver because TCP was experiencing small receive window. It is not possible to tell before this patch without packet traces. To prepare these stats, the user needs to set SOF_TIMESTAMPING_OPT_STATS and SOF_TIMESTAMPING_OPT_TSONLY flags while requesting other SOF_TIMESTAMPING TX timestamps. When the timestamps are available in the error queue, the stats are returned in a separate control message of type SCM_TIMESTAMPING_OPT_STATS, in a list of TLVs (struct nlattr) of types: TCP_NLA_BUSY_TIME, TCP_NLA_RWND_LIMITED, TCP_NLA_SNDBUF_LIMITED. Unit is microsecond. 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 10:04:25 -05:00
..
80211	docs-rst: sphinxify 802.11 documentation	2016-10-11 16:19:17 -06:00
ABI	platform-drivers-x86 for 4.9-3	2016-11-11 16:48:49 -08:00
accounting	tools: move accounting tool from Documentation	2016-09-23 13:07:15 -06:00
acpi	Merge branches 'acpi-button', 'acpi-battery' and 'acpi-doc'	2016-10-02 01:40:20 +02:00
aoe
arm	linux-kselftest-4.9-rc1-update	2016-10-14 15:17:12 -07:00
arm64	arm64 updates for 4.9:	2016-10-03 08:58:35 -07:00
auxdisplay	samples: move auxdisplay example code from Documentation	2016-09-23 11:52:32 -06:00
backlight
blackfin	samples: move blackfin gptimers-example from Documentation	2016-10-10 07:12:02 -06:00
block	block: remove remnant refs to hardsect	2016-09-14 08:44:57 -06:00
blockdev	zram: cosmetic: cleanup documentation	2016-07-26 16:19:19 -07:00
bus-devices
cdrom
cgroup-v1	Three fixes for the docs build, including removing an annoying warning on	2016-08-07 10:23:17 -04:00
cma
connector
console
cpu-freq	cpufreq-stats: Minor documentation fix	2016-09-08 23:05:07 +02:00
cpuidle
cris
crypto
dev-tools	mm: kmemleak: avoid using __va() on addresses that don't have a lowmem mapping	2016-10-11 15:06:33 -07:00
development-process	docs-rst: add inter-document cross references	2016-09-21 15:43:09 -06:00
device-mapper	dm raid: fix activation of existing raid4/10 devices	2016-10-17 16:41:31 -04:00
devicetree	dt: bindings: add ethernet phy eee-broken-modes option documentation	2016-11-29 19:38:31 -05:00
dmaengine	dmaengine: documentation to the new callback mechanism	2016-08-08 08:11:42 +05:30
DocBook	A single commit converting the mac80211 DocBook template over to Sphinx.	2016-10-14 14:11:22 -07:00
driver-api	docs: Don't format internal MPT docs	2016-09-06 09:15:48 -06:00
driver-model	devres: add devm_alloc_percpu()	2016-11-15 22:34:25 -05:00
early-userspace
EDID
extcon
fault-injection
fb
features	Documentation: MIPS supports HAVE_REGS_AND_STACK_ACCESS_API	2016-10-13 17:19:19 +02:00
filesystems	fs: remove the never implemented aio_fsync file operation	2016-10-30 13:09:42 -04:00
firmware_class
fmc
fpga
frv
gpio	gpio/board.txt: point to gpiod_set_value	2016-10-20 14:14:11 +02:00
gpu	Merge tag 'drm-for-v4.9' of git://people.freedesktop.org/~airlied/linux	2016-10-11 18:12:22 -07:00
hid	Documentation: HID: Intel ISH HID document	2016-08-17 11:13:07 +02:00
hwmon	hwmon: (max6650) Allow fan shutdown and initial rpm target	2016-09-08 21:34:17 -07:00
i2c	i2c: Documentation: i2c-topology: fix minor whitespace nit	2016-11-10 21:18:56 +01:00
ia64	selftests: move ia64 tests from Documentation/ia64	2016-09-20 09:58:12 -06:00
ide
iio	iio: Documentation: Correct the path used to create triggers.	2016-10-01 00:49:58 -06:00
infiniband	IB/hfi1: Document new sysfs entries for hfi1 driver	2016-10-02 08:42:19 -04:00
input	Input: ALPS - add V8 protocol documentation	2016-10-04 11:47:02 -07:00
ioctl	doc: ioctl: Add some clarifications to botching-up-ioctls	2016-09-06 06:00:22 -06:00
isdn
ja_JP
kbuild	Merge branch 'kbuild' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild	2016-10-14 14:26:58 -07:00
kdump	Documentation: kdump: Add description of enable multi-cpus support	2016-09-20 18:02:54 -06:00
ko_KR	locking/Documentation: Add Korean translation	2016-08-12 08:24:14 +02:00
laptops	tools: move laptops dslm tool from Documentation	2016-09-23 13:07:21 -06:00
leds	Merge branch 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/j.anaszewski/linux-leds	2016-10-04 10:25:53 -07:00
livepatch	Documentation: livepatch: add section about arch-specific code	2016-08-18 23:41:56 +02:00
locking	locking/lglock: Remove lglock implementation	2016-09-22 15:25:56 +02:00
m68k
media	Linux 4.8	2016-10-05 16:43:53 -03:00
memory-devices
metag
mic	samples: move mic/mpssd example code from Documentation	2016-09-20 12:38:48 -06:00
mips
misc-devices	samples: move misc-devices/mei example code from Documentation	2016-09-23 11:51:43 -06:00
mmc	mmc: core: Extend sysfs with DSR register	2016-07-25 10:34:51 +02:00
mn10300
mtd
namespaces
netlabel
networking	tcp: SOF_TIMESTAMPING_OPT_STATS option for SO_TIMESTAMPING	2016-11-30 10:04:25 -05:00
nfc
nios2
nvdimm
nvmem
parisc
PCI	PCI changes for the v4.9 merge window:	2016-10-07 11:46:37 -07:00
pcmcia	tools: move pcmcia crc32hash tool from Documentation	2016-09-23 13:07:27 -06:00
perf	perf: xgene: Add APM X-Gene SoC Performance Monitoring Unit driver	2016-09-15 11:20:55 -07:00
phy
platform
power	power supply and reset changes for the v4.9 series	2016-10-06 18:21:15 -07:00
powerpc	powerpc updates for 4.9	2016-10-07 20:19:31 -07:00
pps
prctl	selftests: move prctl tests from Documentation/prctl	2016-09-20 09:09:09 -06:00
pti
ptp	selftests: move ptp tests from Documentation/ptp	2016-09-20 09:54:38 -06:00
rapidio	rapidio/documentation/mport_cdev: add missing parameter description	2016-09-01 17:52:02 -07:00
RCU	kthread: kthread worker API cleanup	2016-10-11 15:06:33 -07:00
s390
scheduler	sched/deadline: Document behavior of sched_yield()	2016-09-10 11:17:41 +02:00
scsi	scsi: g_NCR5380: Stop using scsi_module.c	2016-09-29 21:52:43 -04:00
security	Some big changes this month, headlined by the addition of a new formatted	2016-07-26 13:05:11 -07:00
serial	Documentation: rs485: Do not define manually the ioctl	2016-08-18 11:08:33 -06:00
sh
sound	ASoC: Updates for v4.8	2016-07-26 10:35:31 +02:00
sphinx	Merge tag 'docs-next' of git://git.lwn.net/linux.git into patchwork	2016-09-19 16:36:41 -03:00
sphinx-static	This is the documentation update pull for the 4.9 merge window.	2016-10-04 13:54:07 -07:00
spi	Doc: update 00-INDEX files to reflect the runnable code move	2016-10-10 07:12:09 -06:00
sysctl	mnt: Add a per mount namespace limit on the number of mounts	2016-09-30 12:46:48 -05:00
target
thermal	thermal: Add support for hardware-tracked trip points	2016-09-27 14:02:16 +08:00
timers	Doc: update 00-INDEX files to reflect the runnable code move	2016-10-10 07:12:09 -06:00
tpm
trace	This release cycle is rather small. Just a few fixes to tracing.	2016-10-06 11:48:41 -07:00
usb
virtual	kvm: kvmclock: let KVM_GET_CLOCK return whether the master clock is in use	2016-11-19 19:04:16 +01:00
vm	Three fixes for the docs build, including removing an annoying warning on	2016-08-07 10:23:17 -04:00
w1
watchdog	linux-kselftest-4.9-rc1-update	2016-10-14 15:17:12 -07:00
wimax
x86	Merge branch 'mm-pkeys-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2016-10-10 11:01:51 -07:00
xtensa
zh_CN
.gitignore
00-INDEX	Doc: update 00-INDEX files to reflect the runnable code move	2016-10-10 07:12:09 -06:00
adding-syscalls.txt
applying-patches.txt	docs: Clean up bare :: lines	2016-09-20 18:46:36 -06:00
assoc_array.txt
atomic_ops.txt
bad_memory.txt
basic_profiling.txt
bcache.txt
binfmt_misc.txt
braille-console.txt
bt8xxgpio.txt
btmrvl.txt
BUG-HUNTING
bus-virt-phys-mapping.txt
cachetlb.txt
cgroup-v2.txt
Changes	docs: Clean up bare :: lines	2016-09-20 18:46:36 -06:00
circular-buffers.txt
clk.txt	Documentation: clk: update file names containing referenced structures	2016-08-14 12:12:36 -06:00
CodeOfConflict	URL changed for Linux Foundation TAB	2016-10-01 00:57:13 -06:00
CodingStyle	docs: Remove space-before-label guidance from CodingStyle	2016-09-21 15:53:31 -06:00
conf.py	media updates for v4.9-rc1	2016-10-11 13:22:22 -07:00
cpu-hotplug.txt
cpu-load.txt
cputopology.txt
crc32.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt
dell_rbu.txt
devices.txt
digsig.txt
DMA-API-HOWTO.txt	Documentation: DMA-API-HOWTO: Fix a typo	2016-09-20 17:58:46 -06:00
DMA-API.txt	dma-mapping: add dma_{map,unmap}_resource	2016-09-26 22:16:41 +05:30
DMA-attributes.txt	dma-mapping: introduce the DMA_ATTR_NO_WARN attribute	2016-10-11 15:06:32 -07:00
dma-buf-sharing.txt
DMA-ISA-LPC.txt
docutils.conf	doc-rst: add docutils config file	2016-08-14 11:52:40 -06:00
dontdiff
dynamic-debug-howto.txt
edac.txt
efi-stub.txt
eisa.txt
email-clients.txt	Documentation/email-clients.txt: convert it to ReST markup	2016-09-21 15:41:50 -06:00
flexible-arrays.txt
futex-requeue-pi.txt
gcc-plugins.txt
highuid.txt
HOWTO	docs: Clean up bare :: lines	2016-09-20 18:46:36 -06:00
hw_random.txt
hwspinlock.txt
index.rst	docs-rst: sphinxify 802.11 documentation	2016-10-11 16:19:17 -06:00
init.txt
initrd.txt
intel_txt.txt
Intel-IOMMU.txt
io_ordering.txt
io-mapping.txt
iostats.txt
IPMI.txt
IRQ-affinity.txt
IRQ-domain.txt
IRQ.txt
irqflags-tracing.txt
isa.txt
isapnp.txt
java.txt
kernel-doc-nano-HOWTO.txt
kernel-docs.txt	Documentation/kernel-docs.txt: reorder based on timestamp	2016-09-20 18:54:42 -06:00
kernel-documentation.rst	This is the documentation update pull for the 4.9 merge window.	2016-10-04 13:54:07 -07:00
kernel-parameters.txt	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/dtor/input	2016-10-14 13:19:30 -07:00
kernel-per-CPU-kthreads.txt	Documenation: update cgroup's document path	2016-08-03 15:43:58 -06:00
kobject.txt
kprobes.txt	Documentation: kprobes: Document jprobes stack copying limitations	2016-08-15 10:19:11 -06:00
kref.txt
kselftest.txt	kselftest: kselftest documentation improvement	2016-09-20 08:58:27 -06:00
ldm.txt
local_ops.txt
lockup-watchdogs.txt
logo.gif
logo.txt
lzo.txt
magic-number.txt
mailbox.txt
Makefile	samples: move blackfin gptimers-example from Documentation	2016-10-10 07:12:02 -06:00
Makefile.sphinx	doc-rst: generic way to build PDF of sub-folders	2016-09-01 08:49:23 -06:00
ManagementStyle	Documentation/HOWTO: add cross-references to other documents	2016-09-20 18:41:04 -06:00
md-cluster.txt
md.txt
memory-barriers.txt	locking/Documentation: Fix a typo of example result	2016-08-12 08:24:13 +02:00
memory-hotplug.txt
men-chameleon-bus.txt
module-signing.txt	Documentation/module-signing.txt: Note need for version info if reusing a key	2016-07-27 12:38:00 +09:30
mono.txt
nommu-mmap.txt
ntb.txt
numastat.txt
oops-tracing.txt
padata.txt
parport-lowlevel.txt
parport.txt
percpu-rw-semaphore.txt
phy.txt
pi-futex.txt
pinctrl.txt
pnp.txt
preempt-locking.txt
printk-formats.txt
pwm.txt
ramoops.txt	ramoops: use DT reserved-memory bindings	2016-08-05 11:21:36 -07:00
rbtree.txt
remoteproc.txt	remoteproc: Split driver and consumer dereferencing	2016-10-02 22:50:21 -07:00
rfkill.txt
robust-futex-ABI.txt
robust-futexes.txt
rpmsg.txt
rtc.txt
SAK.txt
SecurityBugs	Documentation/HOWTO: add cross-references to other documents	2016-09-20 18:41:04 -06:00
serial-console.txt
sgi-ioc4.txt
SM501.txt
smsc_ece1099.txt
stable_api_nonsense.txt	Documentation/HOWTO: add cross-references to other documents	2016-09-20 18:41:04 -06:00
stable_kernel_rules.txt	docs-rst: add inter-document cross references	2016-09-21 15:43:09 -06:00
static-keys.txt	jump_labels: Allow array initialisers	2016-09-07 09:41:11 +01:00
SubmitChecklist	docs-rst: add inter-document cross references	2016-09-21 15:43:09 -06:00
SubmittingDrivers	docs-rst: add inter-document cross references	2016-09-21 15:43:09 -06:00
SubmittingPatches	docs-rst: add inter-document cross references	2016-09-21 15:43:09 -06:00
svga.txt
sync_file.txt	Documentation: add doc for sync_file_get_fence()	2016-08-11 15:33:24 +05:30
sysfs-rules.txt
sysrq.txt
this_cpu_ops.txt
unaligned-memory-access.txt
unicode.txt
unshare.txt
vfio.txt
VGA-softcursor.txt
video-output.txt
vme_api.txt	vme: Update documentation to match api	2016-08-31 13:20:16 +02:00
volatile-considered-harmful.txt
workqueue.txt
xillybus.txt
xz.txt
zorro.txt