Frederic Weisbecker
287b6e68ca
tracing/function-return-tracer: set a more human readable output ...
Impact: feature
This patch sets a C-like output for the function graph tracing.
For this aim, we now call two handler for each function: one on the entry
and one other on return. This way we can draw a well-ordered call stack.
The pid of the previous trace is loosely stored to be compared against
the one of the current trace to see if there were a context switch.
Without this little feature, the call tree would seem broken at
some locations.
We could use the sched_tracer to capture these sched_events but this
way of processing is much more simpler.
2 spaces have been chosen for indentation to fit the screen while deep
calls. The time of execution in nanosecs is printed just after closed
braces, it seems more easy this way to find the corresponding function.
If the time was printed as a first column, it would be not so easy to
find the corresponding function if it is called on a deep depth.
I plan to output the return value but on 32 bits CPU, the return value
can be 32 or 64, and its difficult to guess on which case we are.
I don't know what would be the better solution on X86-32: only print
eax (low-part) or even edx (high-part).
Actually it's thee same problem when a function return a 8 bits value, the
high part of eax could contain junk values...
Here is an example of trace:
sys_read() {
fget_light() {
} 526
vfs_read() {
rw_verify_area() {
security_file_permission() {
cap_file_permission() {
} 519
} 1564
} 2640
do_sync_read() {
pipe_read() {
__might_sleep() {
} 511
pipe_wait() {
prepare_to_wait() {
} 760
deactivate_task() {
dequeue_task() {
dequeue_task_fair() {
dequeue_entity() {
update_curr() {
update_min_vruntime() {
} 504
} 1587
clear_buddies() {
} 512
add_cfs_task_weight() {
} 519
update_min_vruntime() {
} 511
} 5602
dequeue_entity() {
update_curr() {
update_min_vruntime() {
} 496
} 1631
clear_buddies() {
} 496
update_min_vruntime() {
} 527
} 4580
hrtick_update() {
hrtick_start_fair() {
} 488
} 1489
} 13700
} 14949
} 16016
msecs_to_jiffies() {
} 496
put_prev_task_fair() {
} 504
pick_next_task_fair() {
} 489
pick_next_task_rt() {
} 496
pick_next_task_fair() {
} 489
pick_next_task_idle() {
} 489
------------8<---------- thread 4 ------------8<----------
finish_task_switch() {
} 1203
do_softirq() {
__do_softirq() {
__local_bh_disable() {
} 669
rcu_process_callbacks() {
__rcu_process_callbacks() {
cpu_quiet() {
rcu_start_batch() {
} 503
} 1647
} 3128
__rcu_process_callbacks() {
} 542
} 5362
_local_bh_enable() {
} 587
} 8880
} 9986
kthread_should_stop() {
} 669
deactivate_task() {
dequeue_task() {
dequeue_task_fair() {
dequeue_entity() {
update_curr() {
calc_delta_mine() {
} 511
update_min_vruntime() {
} 511
} 2813
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-11-26 01:59:45 +01:00
byteorder: provide swabb.h generically in asm/byteorder.h
2008-10-20 08:52:40 -07:00
V4L/DVB (9196): Add support for DSS delivery
2008-10-17 17:15:43 -03:00
mfd: twl4030 IRQ handling update
2008-10-22 01:19:37 +02:00
rtc: rtc-wm8350: add support for WM8350 RTC
2008-11-12 17:17:18 -08:00
mlx4_core: Multiple port type support
2008-10-22 15:38:42 -07:00
mmc: struct device - replace bus_id with dev_name(), dev_set_name()
2008-11-08 21:37:46 +01:00
[MTD] [NOR] Fix cfi_send_gen_cmd handling of x16 devices in x8 mode (v4)
2008-11-05 14:40:25 +01:00
md: use sysfs_notify_dirent to notify changes to md/dev-xxx/state
2008-10-21 13:25:28 +11:00
spi: fix compile error
2008-10-30 11:38:47 -07:00
ssb: Fix DMA-API compilation for non-PCI systems
2008-11-10 13:50:19 -08:00
Merge branch 'master' into for-upstream
2008-10-20 16:07:19 +01:00
Merge branch 'video' into release
2008-11-11 21:15:50 -05:00
PCI: fix AER capability check
2008-10-20 11:01:52 -07:00
Configure out AIO support
2008-10-16 11:21:51 -07:00
autofs4: add miscellaneous device for ioctls
2008-10-16 11:21:39 -07:00
autofs4: add miscellaneous device for ioctls
2008-10-16 11:21:39 -07:00
vmscan: split LRU lists into anon & file sets
2008-10-20 08:50:25 -07:00
include/linux/bcd.h: remove comments
2008-10-20 08:52:42 -07:00
Allow recursion in binfmt_script and binfmt_misc
2008-10-16 11:21:38 -07:00
bio: define __BIOVEC_PHYS_MERGEABLE
2008-11-06 08:41:55 +01:00
Merge branch 'for-upstream' of git://git.kernel.org/pub/scm/linux/kernel/git/dvrabel/uwb
2008-10-23 08:20:34 -07:00
[PATCH] end of methods switch: remove the old ones
2008-10-21 07:48:52 -04:00
blktrace: add support for driver data
2008-10-17 08:46:57 +02:00
fs: buffer lock use lock bitops
2008-10-20 08:52:32 -07:00
Add c2 port support
2008-11-12 17:17:18 -08:00
[PATCH] switch cdrom_{open,release,ioctl} to sane APIs
2008-10-21 07:47:22 -04:00
cgroups: tiny cleanups
2008-10-30 11:38:45 -07:00
container freezer: implement freezer cgroup subsystem
2008-10-20 08:52:34 -07:00
include/linux/clk.h: fix comment
2008-10-16 11:21:32 -07:00
clarify usage expectations for cnt32_to_63()
2008-11-09 11:17:33 -08:00
compat: generic compat get/settimeofday
2008-10-16 11:21:33 -07:00
trace: profile all if conditionals
2008-11-23 11:41:01 +01:00
cpumask: introduce new API, without changing anything, v3
2008-11-09 21:09:54 +01:00
cpuset: update top cpuset's mems after adding a node
2008-11-19 18:49:58 -08:00
proc: move /proc/vmcore creation to fs/proc/vmcore.c
2008-10-23 18:51:22 +04:00
[PATCH vfs-2.6 2/6] vfs: add d_ancestor()
2008-10-23 05:13:16 -04:00
Merge git://git.kernel.org/pub/scm/linux/kernel/git/viro/bdev
2008-10-23 10:23:07 -07:00
i2c: Constify i2c_get_clientdata's parameter
2008-10-22 20:21:31 +02:00
dm raid1: separate region_hash interface part1
2008-10-21 17:45:06 +01:00
intel-iommu: IA64 support
2008-10-18 14:29:15 +01:00
dmar: fix using early fixmap mapping for DMAR table parsing
2008-10-16 16:53:04 +02:00
driver core: basic infrastructure for per-module dynamic debug messages
2008-10-16 09:24:47 -07:00
x86: Add UV EFI table entry v4
2008-10-16 16:53:13 +02:00
include: replace __FUNCTION__ with __func__
2008-10-16 11:21:30 -07:00
ext3: add an option to control error handling on file data
2008-10-20 08:52:37 -07:00
include: replace __FUNCTION__ with __func__
2008-10-16 11:21:30 -07:00
fb: convert lock/unlock_kernel() into local fb mutex
2008-10-20 08:52:36 -07:00
[PATCH] introduce fmode_t, do annotations
2008-10-21 07:47:06 -04:00
freezer_cg: use thaw_process() in unfreeze_cgroup()
2008-10-30 11:38:45 -07:00
fs: remove prepare_write/commit_write
2008-10-30 11:38:45 -07:00
gianfar: Fix race in TBI/SerDes configuration
2008-10-31 00:59:46 -04:00
[PATCH] introduce fmode_t, do annotations
2008-10-21 07:47:06 -04:00
tracing/function-return-tracer: set a more human readable output
2008-11-26 01:59:45 +01:00
tracing/function-return-tracer: change the name into function-graph-tracer
2008-11-26 01:59:45 +01:00
fuse: implement nonseekable open
2008-10-16 16:08:57 +02:00
block: make add_partition() return pointer to hd_struct
2008-11-18 15:08:56 +01:00
gpio_free might sleep, generic part
2008-10-16 11:21:40 -07:00
ftrace: split out hardirq ftrace code into own header
2008-11-06 22:20:46 +01:00
HID: fix oops during suspend of unbound HID devices
2008-10-27 15:06:01 +01:00
hrtimer: clean up unused callback modes
2008-11-12 09:54:40 +01:00
proc: switch /proc/meminfo to seq_file
2008-10-23 13:52:40 +04:00
i2c-algo-pcf: Add adapter hooks around xfer begin and end
2008-10-22 20:21:30 +02:00
V4L/DVB (9240): saa7127: Fix two typos
2008-10-17 17:25:11 -03:00
i2c: Add info->archdata field
2008-10-22 20:21:33 +02:00
i2o: Fix 32/64bit DMA locking
2008-10-16 11:21:38 -07:00
i7300_idle: Disable ioat channel only on platforms where ile driver can load
2008-10-24 12:54:18 -04:00
IPV6: Fix default gateway criteria wrt. HIGH/LOW preference radv option
2008-10-15 16:03:01 -07:00
[PATCH] switch ide_disk_ops ->ioctl() to sane prototype
2008-10-21 07:47:30 -04:00
net: fix packet socket delivery in rx irq handler
2008-11-04 14:49:57 -08:00
adjust init section definitions
2008-10-29 22:02:09 +01:00
Fix inotify watch removal/umount races
2008-11-15 12:26:44 -08:00
HID: map macbook keys for "Expose" and "Dashboard"
2008-11-13 10:31:36 +01:00
intel-iommu: IA64 support
2008-10-18 14:29:15 +01:00
Merge branch 'genirq-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-10-20 13:23:01 -07:00
io mapping: clean up #ifdefs
2008-11-03 18:21:45 +01:00
introduce generic iommu_num_pages function
2008-10-16 11:21:33 -07:00
Merge branch 'core-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-10-16 15:17:40 -07:00
genirq: improve include files
2008-10-18 14:05:18 +02:00
genirq: fix off by one and coding style
2008-10-21 15:54:40 +02:00
jbd: fix error handling for checkpoint io
2008-10-23 08:55:01 -07:00
ext4: Replace hackish ext4_mb_poll_new_transaction with commit callback
2008-10-16 20:00:24 -04:00
Remove Andrew Morton's old email accounts
2008-10-16 11:21:32 -07:00
vsprintf: use new vsprintf symbolic function pointer format
2008-10-16 11:21:31 -07:00
byteorder: add new headers for make headers-install
2008-10-20 08:52:40 -07:00
Add 'pr_fmt()' format modifier to pr_xyz macros.
2008-11-15 11:43:37 -08:00
Merge branch 'genirq-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip
2008-10-20 13:23:01 -07:00
pm: rework disabling of user mode helpers during suspend/hibernation
2008-10-16 11:21:29 -07:00
KVM: Future-proof device assignment ABI
2008-10-28 14:22:15 +02:00
KVM: Fix guest shared interrupt with in-kernel irqchip
2008-10-28 14:21:34 +02:00
leds: Make default trigger fields const
2008-10-20 22:34:12 +01:00
libata: revert convert-to-block-tagging patches
2008-11-10 08:04:47 -08:00
lockdep: include/linux/lockdep.h - fix warning in net/bluetooth/af_bluetooth.c
2008-11-13 23:19:10 -08:00
markers: create DEFINE_MARKER and GET_MARKER (new API)
2008-11-16 09:01:30 +01:00
memcg: allocate all page_cgroup at boot
2008-10-20 08:52:39 -07:00
vmscan: move isolate_lru_page() to vmscan.c
2008-10-20 08:50:25 -07:00
mlock: mlocked pages are unevictable
2008-10-20 08:52:30 -07:00
vmscan: kill unused lru functions
2008-10-20 08:52:31 -07:00
memcg: allocate all page_cgroup at boot
2008-10-20 08:52:39 -07:00
memcg: allocate all page_cgroup at boot
2008-10-20 08:52:39 -07:00
HID: fix hid_device_id for cross compiling
2008-10-29 00:51:25 +01:00
param: Fix duplicate module prefixes
2008-10-22 10:00:23 +11:00
core_param() for genuinely core kernel parameters
2008-10-22 10:00:23 +11:00
include/linux/mount.h: remove CVS keyword
2008-10-16 11:21:30 -07:00
fat: Cleanup FAT attribute stuff
2008-11-06 15:41:21 -08:00
[PATCH vfs-2.6 6/6] vfs: add LOOKUP_RENAME_TARGET intent
2008-10-23 05:13:20 -04:00
reintroduce accept4
2008-11-19 18:49:57 -08:00
net: delete excess kernel-doc notation
2008-10-30 23:54:35 -07:00
Make nfs_file_cred more robust.
2008-10-17 13:06:45 -04:00
powerpc/oprofile: Fix mutex locking for cell spu-oprofile
2008-10-21 15:17:48 +11:00
mlock: mlocked pages are unevictable
2008-10-20 08:52:30 -07:00
memcg: fix page_cgroup allocation
2008-10-23 08:55:02 -07:00
mm: page lock use lock bitops
2008-10-20 08:52:32 -07:00
Unevictable LRU Infrastructure
2008-10-20 08:50:26 -07:00
parport: remove CVS keywords
2008-10-16 11:21:49 -07:00
PCI: annotate return value of pci_ioremap_bar with __iomem
2008-11-03 14:31:18 -08:00
PCI: Hotplug core: remove 'name'
2008-10-22 16:42:43 -07:00
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/lenb/linux-acpi-2.6
2008-10-23 10:20:36 -07:00
PCI: add support for function level reset
2008-10-22 16:42:35 -07:00
Phonet: do not reply to indication reset packets
2008-10-26 23:07:25 -07:00
pid_ns: kill the now unused task_child_reaper()
2008-10-16 11:21:48 -07:00
platform: add new device registration helper
2008-10-16 09:24:51 -07:00
include: replace __FUNCTION__ with __func__
2008-10-16 11:21:30 -07:00
Merge branch 'linus' into test
2008-10-23 00:11:07 -04:00
proc: remove fs/proc/proc_misc.c
2008-10-23 18:54:05 +04:00
profiling: fix up CONFIG_PROC_FS=n build
2008-10-23 08:55:01 -07:00
make ptrace_untrace() static
2008-10-20 08:52:39 -07:00
quota: remove CVS keywords
2008-10-16 11:21:46 -07:00
quota: remove CVS keywords
2008-10-16 11:21:46 -07:00
remove ratelimt()
2008-11-12 17:17:17 -08:00
rcu: add rcu_read_*_sched_notrace()
2008-11-16 09:01:25 +01:00
include: replace __FUNCTION__ with __func__
2008-10-16 11:21:30 -07:00
[PATCH] remember mode of reiserfs journal
2008-10-21 07:49:04 -04:00
mm: increase the default mlock limit from 32k to 64k
2008-10-30 11:38:45 -07:00
ring-buffer: add tracing_off_permanent
2008-11-23 11:44:37 +01:00
make mm/rmap.c:anon_vma_cachep static
2008-10-20 08:52:40 -07:00
include: replace __FUNCTION__ with __func__
2008-10-16 11:21:30 -07:00
tracing/function-return-tracer: change the name into function-graph-tracer
2008-11-26 01:59:45 +01:00
nfsd: fix vm overcommit crash
2008-10-30 11:38:47 -07:00
vfs, seqfile: make mangle_path() global
2008-11-23 09:45:39 +01:00
serial: sh-sci: fix cannot work SH7723 SCIFA
2008-11-12 12:29:56 +09:00
slab: document SLAB_DESTROY_BY_RCU
2008-11-13 20:49:02 +02:00
smc911x: Add IRQ polarity configuration
2008-10-22 07:00:38 -04:00
cpumask: introduce new API, without changing anything
2008-11-06 09:05:33 +01:00
tracing/stack-tracer: introduce CONFIG_USER_STACKTRACE_SUPPORT
2008-11-23 11:53:50 +01:00
linux/string.h: fix comment typo
2008-11-02 10:15:07 -08:00
byteorder: use generic C version for value byteswapping
2008-10-20 08:52:40 -07:00
vmscan: unevictable LRU scan sysctl
2008-10-20 08:52:31 -07:00
introduce generic header file for the software IO/TLB
2008-10-16 11:21:28 -07:00
reintroduce accept4
2008-11-19 18:49:57 -08:00
sysctl: simplify ->strategy
2008-10-16 11:21:47 -07:00
x86: sysfs: kill owner field from attribute
2008-10-20 08:52:42 -07:00
Remove Andrew Morton's old email accounts
2008-10-16 11:21:32 -07:00
telephony: trivial: fix up email address
2008-11-11 09:30:23 -08:00
NOHZ: unify the nohz function calls in irq_enter()
2008-10-17 18:13:38 +02:00
Merge branch 'timers/range-hrtimers' into v28-range-hrtimers-for-linus-v2
2008-10-22 09:48:06 +02:00
Add round_jiffies_up and related routines
2008-11-06 08:42:48 +01:00
sched: fine-tune SD_SIBLING_INIT
2008-11-07 16:09:23 +01:00
tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()
2008-11-16 09:01:36 +01:00
tracing, tty: fix warnings caused by branch tracing and tty_kref_get()
2008-11-25 08:59:44 +01:00
[PATCH] introduce fmode_t, do annotations
2008-10-21 07:47:06 -04:00
USB: don't register endpoints for interfaces that are going away
2008-11-13 14:45:00 -08:00
V4L/DVB (9320): v4l2: Add 10-bit RAW Bayer formats
2008-10-21 14:31:15 -02:00
proc: move /proc/vmallocinfo to mm/vmalloc.c
2008-10-23 15:48:28 +04:00
proc: move /proc/zoneinfo boilerplate to mm/vmstat.c
2008-10-23 17:35:04 +04:00
wait: kill is_sync_wait()
2008-10-16 11:21:31 -07:00
cpumask: introduce new API, without changing anything
2008-11-06 09:05:33 +01:00
vfs: Add no_nrwrite_index_update writeback control flag
2008-10-16 10:09:17 -04:00
