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Message-ID: <20081225124121.GA32165@elte.hu>
Date: Thu, 25 Dec 2008 13:41:22 +0100
From: Ingo Molnar <mingo@...e.hu>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: linux-kernel@...r.kernel.org,
Andrew Morton <akpm@...ux-foundation.org>,
Steven Rostedt <rostedt@...dmis.org>,
Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Frédéric Weisbecker <fweisbec@...il.com>
Subject: [git pull] tracing updates for v2.6.29
Linus,
Please pull the latest tracing-core-for-linus git tree from:
git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip.git tracing-core-for-linus
There was a lot of tracing development in this cycle, spread out between
17 topic trees:
tracing/blktrace tracing/branch-tracer tracing/core
tracing/fastboot tracing/ftrace
tracing/function-graph-tracer tracing/hw-branch-tracing
tracing/markers tracing/mmiotrace tracing/nmisafe
tracing/options tracing/power-tracer tracing/powerpc
tracing/profiling tracing/ring-buffer tracing/stack-tracer
tracing/tracepoints
New tracing plugins: the function-graph-tracer, the (hardware-driven)
branch tracer on x86 and the power-tracer. Lots of updates to various
aspects of the infrastructure itself.
One of the most interesting ones is the new function graph tracer, which
can trace all kernel functions and display/render their call graph in the
following text format:
$ cd /debug/tracing/
$ echo function_graph > current_tracer
$ tail -1000 trace
# tracer: function_graph
#
# CPU OVERHEAD FUNCTION CALLS
# | | | | | |
[...]
5) | sys_write() {
5) 0.378 us | fget_light();
5) | vfs_write() {
5) | rw_verify_area() {
5) | security_file_permission() {
5) | selinux_file_permission() {
5) 0.344 us | avc_policy_seqno();
5) 0.265 us | selinux_netlbl_inode_permission();
5) 1.598 us | }
5) 2.297 us | }
5) 2.997 us | }
5) | tty_write() {
5) 0.405 us | tty_paranoia_check();
5) | tty_ldisc_ref_wait() {
5) | tty_ldisc_try() {
5) 0.413 us | _spin_lock_irqsave();
5) 0.276 us | _spin_unlock_irqrestore();
5) 2.552 us | }
There's also various variants of this: it's dyn-ftrace capable (i.e. can
be built into the kernel with near zero overhead in the disabled case and
can be runtime enabled), it can filter to narrow down on interesting
function names (and patterns), and has the ability to trace the a given
set of functions (and all their child functions) - but no other function.
Note: three (smaller) x86 topics were merged into the tracing tree to
resolve conflicts:
x86/tsc # incidental context conflict
x86/ptrace # BTS / hw-tracer semantic interaction
x86/irq # IRQ entry code changes and interaction with irq tracing
The x86 and the tracing tree can be pulled independently of each other and
any combination of them will work fine. The diffstat below was done
assuming that you already pulled the x86 tree.
Thanks,
Ingo
------------------>
Andrew Morton (1):
profiling: clean up profile_nop()
Aneesh Kumar K.V (1):
tracing: branch tracer, fix writing to trace/trace_options
Arjan van de Ven (1):
tracing: add "power-tracer": C/P state tracer to help power optimization
Arnaldo Carvalho de Melo (2):
markers: add missing stdargs.h include, needed due to va_list usage
blktrace: port to tracepoints
Cyrill Gorcunov (1):
x86: entry_64 - introduce FTRACE_ frame macro v2
Frederic Weisbecker (47):
ftrace: add a script to produce a hierarchical view of a function trace
tracing/fastboot: Enable boot tracing only during initcalls
tracing/ftrace: fix a race condition in sched_switch tracer
tracing/ftrace: remove unused code in sched_switch tracer
tracing/fastboot: use sched switch tracer from boot tracer
tracing/ftrace: types and naming corrections for sched tracer
tracing/ftrace: fix a bug when switch current tracer to sched tracer
tracing, x86: add low level support for ftrace return tracing
tracing: add a tracer to catch execution time of kernel functions
tracing/fastboot: move boot tracer structs and funcs into their own header.
tracing/fastboot: Use the ring-buffer timestamp for initcall entries
tracing/function-return-tracer: make the function return tracer lockless
tracing/function-return-tracer: call prepare_ftrace_return by registers
tracing/ftrace: fix unexpected -EINVAL when longest tracer name is set
tracing/ftrace: change the type of the init() callback
tracing/branch-tracer: fix a trace recursion on branch tracer
tracing/function-return-tracer: add a barrier to ensure return stack index is incremented in memory
tracing/function-return-tracer: support for dynamic ftrace on function return tracer
tracing/ftrace: implement a set_flag callback for tracers
tracing/ftrace: make nop tracer using tracer flags
tracing/function-return-tracer: add the overrun field
tracing/function-return-tracer: store return stack into task_struct and allocate it dynamically
tracing/function-return-tracer: don't trace kfree while it frees the return stack
tracing/function-return-tracer: free the return stack on free_task()
tracing/function-return-tracer: change the name into function-graph-tracer
tracing/function-return-tracer: set a more human readable output
tracing/function-graph-tracer: enhancements for the trace output
tracing/function-graph-tracer: adjustments of the trace informations
tracing/branch-tracer: include missing irqflags.h
tracing/function-graph-tracer: support for x86-64
tracing/function-graph-tracer: display unified style cmdline and pid
tracing/function-graph-tracer: improve duration output
tracing/function-graph-tracer: handle ftrace_printk entries
tracing/ftrace: don't insert TRACE_PRINT during selftests
tracing/ftrace: fix the check of ftrace_trace_task
tracing/ftrace: provide the macro task_curr_ret_stack()
tracing/function-graph-tracer: implement a print_headers function
tracing/function-graph-tracer: introduce __notrace_funcgraph to filter special functions
tracing/function-graph-tracer: turn tracing_selftest_running into an int
tracing/function-graph-tracer: append the tracing_graph_flag
tracing/fastboot: include missing headers
tracing/function-graph-tracer: add a new .irqentry.text section
tracing/function-graph-tracer: annotate do_IRQ and smp_apic_timer_interrupt
tracing/function-graph-tracer: Output arrows signal on hardirq call/return
tracing/ftrace: use preempt_enable_no_resched_notrace in ring_buffer_time_stamp()
tracing/ftrace: add the printk-msg-only option
tracing/ftrace: don't trace on early stage of a secondary cpu boot, v3
Heiko Carstens (1):
ftrace: preemptoff selftest not working
Ingo Molnar (25):
Merge branches 'tracing/ftrace' and 'tracing/urgent' into tracing/core
tracing, x86: clean up FUNCTION_RET_TRACER Kconfig
tracing, x86: function return tracer, fix assembly constraints
tracing: function return tracer, build fix
tracing: branch tracer, tweak output
tracing: branch tracer, fix vdso crash
tracing: finetune branch-tracer output
tracepoints: format documentation
markers/tracpoints: fix non-modular build
ftrace: fix selftest locking
tracing/function-return-tracer: clean up task start/exit callbacks
tracing: allow tracing of suspend/resume & hibernation code again
tracing, tty: fix warnings caused by branch tracing and tty_kref_get()
tracing: function graph tracer, fix
blktrace: port to tracepoints, update
tracing/function-graph-tracer: more output tweaks
vfs, seqfile: export mangle_path() generally
tracing/function-graph-tracer: enabled by default
tracing: fix typo and missing inline function
tracing/function-graph-tracer: fix 'flags' variable mismatch
x86, bts: fix build error
tracing/function-graph-tracer: add a new .irqentry.text section, fix
tracing: fix warning in kernel/trace/trace.c
tracing: fix warnings in kernel/trace/trace_sched_switch.c
Revert "x86: disable X86_PTRACE_BTS"
Jim Radford (1):
ftrace: scripts/recordmcount.pl support for ARM
Lai Jiangshan (8):
markers: simplify marker_set_format()
markers: remove exported symbol marker_probe_cb_noarg()
markers: let marker_table be close to its comments
tracepoint: simplification for tracepoints using RCU
tracepoint: introduce *_noupdate APIs.
ring_buffer: fix comments
tracing/ring-buffer: remove unused ring_buffer size
ftrace: enable format arguments checking
Liming Wang (4):
ftrace: adding other non-leaving .text sections
ftrace: improve seq_operation of ftrace
function trace: fix a bug of single thread function trace
ftrace: avoid duplicated function when writing set_graph_function
Markus Metzger (11):
x86, bts: base in-kernel ds interface on handles
x86, bts, ptrace: move BTS buffer allocation from ds.c into ptrace.c
x86, ftrace: call trace->open() before stopping tracing; add trace->print_header()
x86, bts, ftrace: a BTS ftrace plug-in prototype
x86, bts: turn BUG_ON into WARN_ON_ONCE
x86, bts: provide in-kernel branch-trace interface
x86, bts, ftrace: adapt the hw-branch-tracer to the ds.c interface
x86, bts: remove recursion from get_context
x86, bts: correctly report invalid bts records
x86, bts: add fork and exit handling
x86, bts: memory accounting
Mathieu Desnoyers (15):
rcu: add rcu_read_*_sched_notrace()
markers: fix unregister
markers: use rcu_*_sched_notrace and notrace
markers: use module notifier
markers: auto enable tracepoints (new API : trace_mark_tp())
markers: create DEFINE_MARKER and GET_MARKER (new API)
tracepoints: samples, fix teardown
tracepoints: fix disable
tracepoints: use rcu_*_sched_notrace
tracepoints: use unregister return value
tracepoints: do not put arguments in name
tracepoints: use modules notifiers
tracepoints: add DECLARE_TRACE() and DEFINE_TRACE()
tracepoints: documentation fix for teardown
tracepoints, docs: marker_synchronize_unregister->tracepoint_synchronize_unregister
Matt Fleming (3):
ftrace: align __mcount_loc sections
sh: dynamic ftrace support.
ftrace: specify $alignment for sh architecture
Nikanth Karthikesan (1):
tracepoints: Documentation TPPROTO misspelt in Documentation/tracepoints.txt
Pekka J Enberg (1):
ftrace: introduce tracing_reset_online_cpus() helper
Pekka Paalanen (1):
trace: add the MMIO-tracer to the tracer menu, cleanup
Peter Zijlstra (5):
ftrace: ftrace_dump_on_oops=[tracer]
ftrace: sysrq-z to dump the buffers
ftrace: sysctl typo
sched: fix tracepoints in scheduler
sched, trace: update trace_sched_wakeup()
Stephen Hemminger (2):
tracing/fastboot: fix perlcritic warning
tracing/fastboot: put error message on stderr
Stephen Rothwell (1):
tracing/fastboot: fix len of func buffer
Steven Rostedt (94):
ftrace: ftrace dump on oops control
ftrace: nmi safe code modification
ftrace: nmi update statistics
ftrace, kbuild: condense recordmcount.pl parameter code
ftrace: nmi safe code clean ups
ftrace: fix hardirq header for non ftrace archs
ftrace: introduce ftrace_preempt_disable()/enable()
ftrace: insert in the ftrace_preempt_disable()/enable() functions
ftrace: function tracer with irqs disabled
ftrace: add quick function trace stop
ftrace: soft tracing stop and start
ftrace: restructure tracing start/stop infrastructure
ring-buffer: convert to raw spinlocks
ftrace: split out hardirq ftrace code into own header
ftrace: fix set_ftrace_filter
ftrace: fix boot trace sched startup
ftrace: fix sched_switch API
ftrace: irqsoff tracer incorrect reset
ftrace: enable trace_printk by default
ftrace: remove ctrl_update method
ftrace: remove trace array ctrl
ftrace: force pass of preemptoff selftest
ftrace: display start of CPU buffer in trace output
ftrace: prevent ftrace_special from recursion
ring-buffer: replace most bug ons with warn on and disable buffer
ring-buffer: add reader lock
ring-buffer: clean up warn ons
ring-buffer: fix deadlock from reader_lock in read_start
tracing: profile likely and unlikely annotations
tracing: likely/unlikely branch annotation tracer
trace: rename unlikely profiler to branch profiler
ftrace: rename unlikely iter_ctrl to branch
ftrace: add tracer called branch
ftrace: rename trace_unlikely.c file
ftrace: rename trace_entries to buffer_size_kb
ftrace: show buffer size in kilobytes
ftrace: rename iter_ctrl to trace_options
ftrace: CPU buffer start annotation clean ups
ftrace: remove condition from ftrace_record_ip
ftrace: disable ftrace on anomalies in trace start and stop
ftrace: do not process freed records
ftrace: replace raw_local_irq_save with local_irq_save
ftrace: pass module struct to arch dynamic ftrace functions
ftrace: allow NULL pointers in mcount_loc
ftrace: fix dyn ftrace filter
ftrace: make filtered functions effective on setting
powerpc: ftrace, do not latency trace idle
powerpc: ftrace, convert to new dynamic ftrace arch API
powerpc: ftrace, use probe_kernel API to modify code
powerpc/ppc64: ftrace, handle module trampolines for dyn ftrace
powerpc/ppc32: ftrace, dynamic ftrace to handle modules
ftrace: add support for powerpc to recordmcount.pl script
ftrace: create default variables for archs in recordmcount.pl
trace: remove extra assign in branch check
trace: consolidate unlikely and likely profiler
trace: branch profiling should not print percent without data
trace: profile all if conditionals
ring-buffer: add tracing_off_permanent
ftrace: add ftrace_off_permanent
trace: fix compiler warning in branch profiler
ftrace: add function tracing to single thread
ftrace: use code patching for ftrace graph tracer
ftrace: let function tracing and function return run together
ftrace: add thread comm to function graph tracer
ftrace: add cpu annotation for function graph tracer
powerpc: ftrace, do nothing in mcount call for dyn ftrace
powerpc: ftrace, fix cast aliasing and add code verification
powerpc: ftrace, added missing icache flush
powerpc: ftrace, use create_branch
powerpc/ppc32: static ftrace fixes for PPC32
ftrace: replace raw_local_irq_save with local_irq_save
ring-buffer: move some metadata into buffer page
ring-buffer: read page interface
ftrace: clean up function graph asm
ftrace: have function graph use mcount caller address
ftrace: add ftrace_graph_stop()
ring-buffer: change "page" variable names to "bpage"
ftrace: print real return in dumpstack for function graph
ftrace: function graph return for function entry
ftrace: add checks on ret stack in function graph
trace: fix output of stack trace
ftrace: fix race in function graph during fork
ftrace: graph of a single function
ftrace: use task struct trace flag to filter on pid
ftrace: trace single pid for function graph tracer
pid: fix the do_each_pid_task() macro
ftrace: use struct pid
ftrace: add ability to only trace swapper tasks
ftrace: use init_struct_pid as swapper pid
trace: add a way to enable or disable the stack tracer
trace: better use of stack_trace_enabled for boot up code
ftrace: add not to regex on filtering functions
ring-buffer: fix dangling commit race
ring-buffer: prevent false positive warning
Thomas Gleixner (1):
trace: fix task state printout
Török Edwin (9):
tracing: add support for userspace stacktraces in tracing/iter_ctrl
vfs, seqfile: make mangle_path() global
tracing: identify which executable object the userspace address belongs to
tracing/stack-tracer: fix style issues
tracing/stack-tracer: fix locking and refcounts
tracing/stack-tracer: introduce CONFIG_USER_STACKTRACE_SUPPORT
tracing/stack-tracer: avoid races accessing file
vfs, seqfile: fix comment style on mangle_path
tracing, alpha: fix build: add missing #ifdef CONFIG_STACKTRACE
Will Newton (1):
init/main.c: use ktime accessor function in initcall_debug code
Wu Fengguang (1):
markers: comment marker_synchronize_unregister() on data dependency
Zhaolei (1):
markers: break the redundant loop in kernel/marker.c
walimis (2):
ftrace: remove unnecessary if condition of __unregister_ftrace_function
ftrace: improve documentation
Documentation/ftrace.txt | 149 +++-
Documentation/kernel-parameters.txt | 12 +
Documentation/markers.txt | 29 +-
Documentation/tracepoints.txt | 94 ++-
arch/powerpc/include/asm/ftrace.h | 14 +-
arch/powerpc/include/asm/module.h | 16 +-
arch/powerpc/kernel/Makefile | 1 +
arch/powerpc/kernel/entry_32.S | 40 +-
arch/powerpc/kernel/entry_64.S | 12 -
arch/powerpc/kernel/ftrace.c | 461 +++++++++-
arch/powerpc/kernel/idle.c | 5 +
arch/powerpc/kernel/module_32.c | 10 +
arch/powerpc/kernel/module_64.c | 13 +
arch/powerpc/lib/Makefile | 3 +
arch/x86/Kconfig | 3 +
arch/x86/Kconfig.cpu | 2 +-
arch/x86/Kconfig.debug | 4 -
arch/x86/include/asm/ds.h | 312 ++++---
arch/x86/include/asm/ftrace.h | 61 ++-
arch/x86/include/asm/msr.h | 3 +-
arch/x86/include/asm/processor.h | 13 +
arch/x86/include/asm/ptrace.h | 43 +-
arch/x86/include/asm/thread_info.h | 7 +-
arch/x86/kernel/Makefile | 1 +
arch/x86/kernel/apic.c | 3 +-
arch/x86/kernel/cpu/Makefile | 5 +
arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c | 4 +
arch/x86/kernel/cpu/intel.c | 4 -
arch/x86/kernel/ds.c | 1138 +++++++++++++-----------
arch/x86/kernel/dumpstack.c | 34 +-
arch/x86/kernel/dumpstack.h | 2 +-
arch/x86/kernel/dumpstack_32.c | 5 +-
arch/x86/kernel/dumpstack_64.c | 7 +-
arch/x86/kernel/entry_32.S | 51 +-
arch/x86/kernel/entry_64.S | 98 ++-
arch/x86/kernel/ftrace.c | 390 ++++++++-
arch/x86/kernel/irq_64.c | 3 +-
arch/x86/kernel/process.c | 16 +
arch/x86/kernel/process_32.c | 67 +--
arch/x86/kernel/process_64.c | 58 +-
arch/x86/kernel/ptrace.c | 431 ++++------
arch/x86/kernel/smpboot.c | 2 +-
arch/x86/kernel/stacktrace.c | 64 ++
arch/x86/kernel/vmlinux_32.lds.S | 1 +
arch/x86/kernel/vmlinux_64.lds.S | 1 +
arch/x86/kernel/vsyscall_64.c | 3 +
arch/x86/mm/Makefile | 3 +-
arch/x86/mm/fault.c | 2 +-
arch/x86/vdso/vclock_gettime.c | 3 +
block/Kconfig | 1 +
block/blk-core.c | 46 +-
block/blktrace.c | 332 +++++++-
block/elevator.c | 12 +-
drivers/char/sysrq.c | 18 +-
drivers/md/dm.c | 8 +-
fs/bio.c | 5 +-
fs/seq_file.c | 14 +-
include/asm-generic/vmlinux.lds.h | 31 +-
include/linux/blktrace_api.h | 172 +----
include/linux/compiler.h | 84 ++-
include/linux/ftrace.h | 293 ++++++-
include/linux/ftrace_irq.h | 13 +
include/linux/hardirq.h | 15 +-
include/linux/marker.h | 75 ++-
include/linux/mm.h | 2 +
include/linux/pid.h | 4 +-
include/linux/ptrace.h | 22 +
include/linux/rcupdate.h | 2 +
include/linux/ring_buffer.h | 16 +-
include/linux/sched.h | 31 +
include/linux/seq_file.h | 1 +
include/linux/stacktrace.h | 8 +
include/linux/tracepoint.h | 57 +-
include/linux/tty.h | 2 +-
include/trace/block.h | 76 ++
include/trace/boot.h | 60 ++
include/trace/sched.h | 36 +-
init/Kconfig | 1 +
init/main.c | 35 +-
kernel/exit.c | 5 +-
kernel/extable.c | 5 +-
kernel/fork.c | 14 +-
kernel/kthread.c | 3 +
kernel/lockdep.c | 1 +
kernel/marker.c | 192 +++--
kernel/module.c | 13 +-
kernel/power/disk.c | 13 +-
kernel/power/main.c | 5 +-
kernel/profile.c | 2 +-
kernel/ptrace.c | 12 +
kernel/sched.c | 14 +-
kernel/signal.c | 2 +
kernel/sysctl.c | 20 +
kernel/trace/Kconfig | 115 +++-
kernel/trace/Makefile | 9 +
kernel/trace/ftrace.c | 929 +++++++++++++++++---
kernel/trace/ring_buffer.c | 709 +++++++++++-----
kernel/trace/trace.c | 976 +++++++++++++++++----
kernel/trace/trace.h | 265 ++++++-
kernel/trace/trace_boot.c | 158 +++-
kernel/trace/trace_branch.c | 342 +++++++
kernel/trace/trace_functions.c | 30 +-
kernel/trace/trace_functions_graph.c | 669 ++++++++++++++
kernel/trace/trace_hw_branches.c | 195 ++++
kernel/trace/trace_irqsoff.c | 61 +-
kernel/trace/trace_mmiotrace.c | 33 +-
kernel/trace/trace_nop.c | 65 ++-
kernel/trace/trace_power.c | 179 ++++
kernel/trace/trace_sched_switch.c | 121 ++-
kernel/trace/trace_sched_wakeup.c | 72 +-
kernel/trace/trace_selftest.c | 173 +++-
kernel/trace/trace_stack.c | 70 ++-
kernel/trace/trace_sysprof.c | 31 +-
kernel/tracepoint.c | 295 ++++---
mm/bounce.c | 5 +-
mm/mlock.c | 45 +
samples/tracepoints/tp-samples-trace.h | 4 +-
samples/tracepoints/tracepoint-probe-sample.c | 1 +
samples/tracepoints/tracepoint-probe-sample2.c | 1 +
samples/tracepoints/tracepoint-sample.c | 3 +
scripts/Makefile.build | 12 +-
scripts/bootgraph.pl | 16 +-
scripts/recordmcount.pl | 51 +-
scripts/trace/power.pl | 108 +++
scripts/tracing/draw_functrace.py | 130 +++
125 files changed, 8742 insertions(+), 2607 deletions(-)
create mode 100644 include/linux/ftrace_irq.h
create mode 100644 include/trace/block.h
create mode 100644 include/trace/boot.h
create mode 100644 kernel/trace/trace_branch.c
create mode 100644 kernel/trace/trace_functions_graph.c
create mode 100644 kernel/trace/trace_hw_branches.c
create mode 100644 kernel/trace/trace_power.c
create mode 100644 scripts/trace/power.pl
create mode 100644 scripts/tracing/draw_functrace.py
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