Takashi Iwai f5914908a5 ALSA: pcm: Replace PCM hwptr tracking with tracepoints ... ALSA PCM core has a mechanism tracking the PCM hwptr updates for analyzing XRUNs. But its log is limited (up to 10) and its log output is a kernel message, which is hard to handle. In this patch, the hwptr logging is moved to the tracing infrastructure instead of its own. Not only the hwptr updates but also XRUN and hwptr errors are recorded on the trace log, so that user can see such events at the exact timing. The new "snd_pcm" entry will appear in the tracing events: # ls -F /sys/kernel/debug/tracing/events/snd_pcm enable filter hw_ptr_error/ hwptr/ xrun/ The hwptr is for the regular hwptr update events. An event trace looks like: aplay-26187 [004] d..3 4012.834761: hwptr: pcmC0D0p/sub0: POS: pos=488, old=0, base=0, period=1024, buf=16384 "POS" shows the hwptr update by the explicit position update call and "IRQ" means the hwptr update by the interrupt, i.e. snd_pcm_period_elapsed() call. The "pos" is the passed ring-buffer offset by the caller, "old" is the previous hwptr, "base" is the hwptr base position, "period" and "buf" are period- and buffer-size of the target PCM substream. (Note that the hwptr position displayed here isn't the ring-buffer offset. It increments up to the PCM position boundary.) The XRUN event appears similarly, but without "pos" field. The hwptr error events appear with the PCM identifier and its reason string, such as "Lost interrupt?". The XRUN and hwptr error reports on kernel message are still left, can be turned on/off via xrun_debug proc like before. But the bit 3, 4, 5 and 6 bits of xrun_debug proc are dropped by this patch. Also, along with the change, the message strings have been reformatted to be a bit more consistent. Last but not least, the hwptr reporting is enabled only when CONFIG_SND_PCM_XRUN_DEBUG is set. Signed-off-by: Takashi Iwai <tiwai@suse.de>		2014-11-04 14:09:14 +01:00
..
ABI	Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-10-19 11:55:41 -07:00
accounting	Documentation: use subdir-y to avoid unnecessary built-in.o files	2014-09-26 11:02:55 +02:00
acpi	mfd: Add ACPI support	2014-09-26 08:24:05 +01:00
aoe
arm	ARM: SoC DT updates for 3.18	2014-10-08 17:22:23 -04:00
arm64	Documentation/arm64/memory.txt: fix typo	2014-10-20 17:55:38 +01:00
auxdisplay	Documentation: use subdir-y to avoid unnecessary built-in.o files	2014-09-26 11:02:55 +02:00
backlight
blackfin	Documentation: add makefiles for more targets	2014-09-26 11:02:56 +02:00
block	Merge branch 'for-3.18/core' of git://git.kernel.dk/linux-block	2014-10-18 11:53:51 -07:00
blockdev	zram: report maximum used memory	2014-10-09 22:26:02 -04:00
bus-devices
cdrom
cgroups	cpuset: PF_SPREAD_PAGE and PF_SPREAD_SLAB should be atomic flags	2014-09-24 22:16:06 -04:00
connector	w1: optional bundling of netlink kernel replies	2014-05-27 13:56:21 -07:00
console
cpu-freq	intel_pstate: Update documentation of {max,min}_perf_pct sysfs files	2014-07-07 01:22:19 +02:00
cpuidle
cris
crypto
development-process
device-mapper	dm switch: efficiently support repetitive patterns	2014-08-01 12:30:37 -04:00
devicetree	Merge remote-tracking branches 'asoc/fix/adau1761', 'asoc/fix/fsl', 'asoc/fix/intel', 'asoc/fix/s6000' and 'asoc/fix/sgtl5000' into asoc-linus	2014-10-27 11:17:41 +00:00
DocBook	ALSA: doc: Fix missing "I" for kerneldoc inclusion	2014-10-30 15:42:33 +01:00
driver-model	PCI changes for the v3.18 merge window:	2014-10-09 15:03:49 -04:00
dvb	[media] get_dvb_firmware: Update firmware of ITEtech IT9135	2014-09-21 17:03:04 -03:00
early-userspace
EDID	drm: Add 800x600 (SVGA) screen resolution to the built-in EDIDs	2014-05-26 12:53:40 +10:00
extcon
fault-injection
fb
filesystems	overlay: overlay filesystem documentation	2014-10-24 00:14:39 +02:00
firmware_class	doc: fix minor typos in firmware_class README	2014-07-17 18:43:40 -07:00
fmc
frv
gpio	This is the bulk of GPIO changes for the v3.18 development	2014-10-09 14:58:15 -04:00
hid	HID: uhid: update documentation	2014-08-25 03:28:09 -05:00
hwmon	Immutable branch between MFD, HWMON, LEDs and Watchdog for v3.18	2014-09-24 09:25:06 -07:00
i2c	i2c: i801: Add Device IDs for Intel Sunrise Point PCH	2014-10-16 09:16:22 +02:00
i2o
ia64	Documentation: use subdir-y to avoid unnecessary built-in.o files	2014-09-26 11:02:55 +02:00
ide
infiniband	IB/mad: add new ioctl to ABI to support new registration options	2014-08-10 20:36:00 -07:00
input	Merge branch 'next' into for-linus	2014-08-06 23:36:12 -07:00
ioctl	cxl: Add documentation for userspace APIs	2014-10-08 20:16:19 +11:00
isdn
ja_JP
kbuild	Documentation: kbuild: Improve grammar	2014-08-19 10:02:56 +02:00
kdump	Documentation/kdump/kdump.txt: add ARM description	2014-08-29 16:28:17 -07:00
ko_KR
laptops	Documentation: update .gitignore files	2014-09-26 11:02:59 +02:00
leds
locking	Merge branch 'locking-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-10-13 15:51:40 +02:00
m68k
memory-devices
metag
mic	Documentation: update include path for mpssd	2014-10-03 15:48:20 +02:00
mips	Documentation: au1xxx-ide.c has moved	2014-08-26 09:35:53 +02:00
misc-devices	Documentation: use subdir-y to avoid unnecessary built-in.o files	2014-09-26 11:02:55 +02:00
mmc
mn10300
mtd	MTD updates for 3.16:	2014-06-11 08:35:34 -07:00
namespaces
netlabel
networking	Documentation: replace __sk_run_filter with __bpf_prog_run	2014-10-10 15:10:50 -04:00
nfc
parisc
PCI	doc: replace "practise" with "practice" in Documentation	2014-06-19 15:28:56 +02:00
pcmcia	Documentation: use subdir-y to avoid unnecessary built-in.o files	2014-09-26 11:02:55 +02:00
phy
platform	Documentation: Add list of laptop models supported by the Compal driver	2014-06-10 19:11:06 -04:00
power	Merge branch 'pm-qos'	2014-10-23 23:02:36 +02:00
powerpc	cxl: Add documentation for userspace APIs	2014-10-08 20:16:19 +11:00
pps
prctl	Documentation: update .gitignore files	2014-09-26 11:02:59 +02:00
pti
ptp	Documentation: update .gitignore files	2014-09-26 11:02:59 +02:00
rapidio	rapidio/tsi721_dma: rework scatter-gather list handling	2014-08-08 15:57:24 -07:00
RCU	documentation: Add verbiage on RCU-tasks stall warning messages	2014-09-07 16:27:28 -07:00
s390	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next	2014-06-04 08:50:34 -07:00
scheduler	Documentation/scheduler/sched-deadline.txt: Add minimal main() appendix	2014-09-16 10:23:45 +02:00
scsi	Merge branch 'for-linus' of git://git.open-osd.org/linux-open-osd	2014-10-21 12:53:45 -07:00
security	Merge branch 'next' of git://git.kernel.org/pub/scm/linux/kernel/git/jmorris/linux-security	2014-10-12 10:13:55 -04:00
serial	TTY/Serial driver patches for 3.18-rc1	2014-10-08 06:52:11 -04:00
sh
sound	ALSA: pcm: Replace PCM hwptr tracking with tracepoints	2014-11-04 14:09:14 +01:00
spi	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/doc	2014-10-07 21:14:57 -04:00
sysctl	coredump: add %i/%I in core_pattern to report the tid of the crashed thread	2014-10-14 02:18:21 +02:00
target	target: Add documentation on the target userspace pass-through driver	2014-10-02 21:35:54 -07:00
thermal	drm/nouveau/doc: update the thermal documentation	2014-06-17 14:50:17 +10:00
timers	Documentation: update .gitignore files	2014-09-26 11:02:59 +02:00
tpm
trace	mm: trace-vmscan-postprocess.pl: report the number of file/anon pages respectively	2014-08-06 18:01:20 -07:00
usb	usb: hub: rename khubd to hub_wq in documentation and comments	2014-09-23 22:33:19 -07:00
vDSO	Documentation: disable vdso_test to avoid breakage with old glibc	2014-09-26 11:03:00 +02:00
video4linux	media updates for v3.18-rc1	2014-10-10 22:04:49 -04:00
virtual	Changes for KVM for arm/arm64 for 3.18	2014-09-27 11:03:33 +02:00
vm	mm: mark remap_file_pages() syscall as deprecated	2014-06-06 16:08:17 -07:00
w1	w1: new w1_ds2406 driver	2014-06-19 17:45:14 -07:00
watchdog	Documentation: use subdir-y to avoid unnecessary built-in.o files	2014-09-26 11:02:55 +02:00
wimax
x86	x86/mm: Update memory map description to list hypervisor-reserved area	2014-09-19 12:48:02 +02:00
xtensa
zh_CN	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial	2014-08-06 21:03:53 -07:00
00-INDEX	locking/Documentation: Move locking related docs into Documentation/locking/	2014-08-13 10:32:03 +02:00
applying-patches.txt	Documentation: change "&" to "and" in Documentation/applying-patches.txt	2014-09-26 11:10:11 +02:00
assoc_array.txt
atomic_ops.txt
bad_memory.txt
basic_profiling.txt
bcache.txt
binfmt_misc.txt	binfmt_misc: touch up documentation a bit	2014-10-14 02:18:16 +02:00
braille-console.txt
bt8xxgpio.txt
btmrvl.txt
BUG-HUNTING
bus-virt-phys-mapping.txt
cachetlb.txt
Changes	Documentation: remove obsolete pcmcia-cs from Changes	2014-09-09 10:35:58 +02:00
circular-buffers.txt
clk.txt
coccinelle.txt
CodingStyle	CodingStyle: fix a minor typo	2014-08-26 09:35:54 +02:00
cpu-hotplug.txt
cpu-load.txt
cputopology.txt
crc32.txt
dcdbas.txt
debugging-modules.txt
debugging-via-ohci1394.txt	firewire: revert to 4 GB RDMA, fix protocols using Memory Space	2014-05-29 15:50:30 +02:00
dell_rbu.txt
devices.txt
digsig.txt
DMA-API-HOWTO.txt	Documentation: correct parameter error for dma_mapping_error	2014-09-26 11:22:29 +02:00
DMA-API.txt	DMA-API: Capitalize "CPU" consistently	2014-05-26 17:28:27 -06:00
DMA-attributes.txt
dma-buf-sharing.txt	Documentation/dma-buf-sharing.txt: update API descriptions	2014-08-28 11:57:24 +05:30
DMA-ISA-LPC.txt
dmaengine.txt	dmaengine: Update documentation for inline wrapper	2014-08-28 12:37:55 +05:30
dmatest.txt
dontdiff
dynamic-debug-howto.txt
edac.txt	Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial into next	2014-06-04 08:50:34 -07:00
efi-stub.txt
eisa.txt
email-clients.txt	Documentation: add section about git to email-clients.txt	2014-06-29 13:38:33 -07:00
flexible-arrays.txt
futex-requeue-pi.txt
gcov.txt
highuid.txt
HOWTO
hsi.txt
hw_random.txt
hwspinlock.txt
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	genirq: Improve documentation to match current implementation	2014-05-27 10:16:44 +02:00
IRQ.txt
irqflags-tracing.txt
isapnp.txt
java.txt	Documentation: update java sample wrapper for java 7	2014-05-25 12:39:00 -07:00
kernel-doc-nano-HOWTO.txt
kernel-docs.txt
kernel-parameters.txt	Merge branch 'x86-efi-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2014-10-23 14:45:09 -07:00
kernel-per-CPU-kthreads.txt
kmemcheck.txt
kmemleak.txt	Documentation: kmemleak: correct spelling mistake	2014-08-26 09:35:53 +02:00
kobject.txt
kprobes.txt	Documentation/kprobes: add s390 to list of supported architectures	2014-09-09 08:53:27 +02:00
kref.txt
ldm.txt
local_ops.txt
lockup-watchdogs.txt	lockup-watchdogs: Fix a typo	2014-08-26 09:35:52 +02:00
logo.gif
logo.txt
lzo.txt	Documentation: lzo: document part of the encoding	2014-09-28 11:08:00 +02:00
magic-number.txt
mailbox.txt	doc: add documentation for mailbox framework	2014-10-08 10:39:41 +05:30
Makefile	Documentation: add makefiles for more targets	2014-09-26 11:02:56 +02:00
ManagementStyle
md.txt
media-framework.txt
memory-barriers.txt	memory-barriers: Fix description of 2-legged-if-based control dependencies	2014-09-07 16:15:53 -07:00
memory-hotplug.txt	memory-hotplug: add sysfs valid_zones attribute	2014-10-09 22:25:52 -04:00
module-signing.txt
mono.txt
nommu-mmap.txt
numastat.txt
oops-tracing.txt	panic: add TAINT_SOFTLOCKUP	2014-08-08 15:57:24 -07:00
padata.txt
parport-lowlevel.txt
parport.txt
percpu-rw-semaphore.txt
phy.txt	phy: core: Let node ptr of PHY point to PHY and not of PHY provider	2014-07-22 12:46:11 +05:30
pi-futex.txt
pinctrl.txt	pinctrl: clean up after enable refactoring	2014-09-04 10:05:07 +02:00
pnp.txt
preempt-locking.txt
printk-formats.txt	lib/vsprintf: add %*pE[achnops] format specifier	2014-10-14 02:18:26 +02:00
pwm.txt
ramoops.txt
rbtree.txt
remoteproc.txt
rfkill.txt
robust-futex-ABI.txt
robust-futexes.txt
rpmsg.txt
rtc.txt
SAK.txt
SecurityBugs
serial-console.txt
sgi-ioc4.txt
SM501.txt
smsc_ece1099.txt
sparse.txt
stable_api_nonsense.txt
stable_kernel_rules.txt	stable_kernel_rules: Add pointer to netdev-FAQ for network patches	2014-07-09 15:54:27 -07:00
static-keys.txt
SubmitChecklist
SubmittingDrivers	doc: SubmittingPatches: remove dead link, kerneltrap.org no longer works	2014-06-19 15:15:27 +02:00
SubmittingPatches	Documentation: new page link in SubmittingPatches	2014-09-07 15:21:13 -07:00
svga.txt
sysfs-rules.txt	Documentation/sysfs-rules.txt: Add device attribute error code documentation	2014-09-19 14:44:51 -07:00
sysrq.txt
this_cpu_ops.txt	Docs: this_cpu_ops: remove redundant add forms	2014-09-26 11:03:00 +02:00
unaligned-memory-access.txt
unicode.txt
unshare.txt
vfio.txt	drivers/vfio: EEH support for VFIO PCI device	2014-08-05 15:28:48 +10:00
VGA-softcursor.txt
vgaarbiter.txt
video-output.txt
vme_api.txt
volatile-considered-harmful.txt
workqueue.txt
xillybus.txt	xillybus: Move out of staging	2014-09-23 23:44:16 -07:00
xz.txt
zorro.txt