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85acbb21b9310043692cf18b1fd14067b5a25ccd
linux/kernel/trace
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Changbin Du 85acbb21b9 tracing: Change the function format to display function names by perf 
Here is an example for this change.

$ sudo perf record -e 'ftrace:function' --filter='ip==schedule'
$ sudo perf report

The output of perf before this patch:

\# Samples: 100  of event 'ftrace:function'
\# Event count (approx.): 100
\#
\# Overhead  Trace output
\# ........  ......................................
\#
    51.00%   ffffffff81f6aaa0 <-- ffffffff81158e8d
    29.00%   ffffffff81f6aaa0 <-- ffffffff8116ccb2
     8.00%   ffffffff81f6aaa0 <-- ffffffff81f6f2ed
     4.00%   ffffffff81f6aaa0 <-- ffffffff811628db
     4.00%   ffffffff81f6aaa0 <-- ffffffff81f6ec5b
     2.00%   ffffffff81f6aaa0 <-- ffffffff81f6f21a
     1.00%   ffffffff81f6aaa0 <-- ffffffff811b04af
     1.00%   ffffffff81f6aaa0 <-- ffffffff8143ce17

After this patch:

\# Samples: 36  of event 'ftrace:function'
\# Event count (approx.): 36
\#
\# Overhead  Trace output
\# ........  ............................................
\#
    38.89%   schedule <-- schedule_hrtimeout_range_clock
    27.78%   schedule <-- worker_thread
    13.89%   schedule <-- schedule_timeout
    11.11%   schedule <-- smpboot_thread_fn
     5.56%   schedule <-- rcu_gp_kthread
     2.78%   schedule <-- exit_to_usermode_loop

Link: http://lkml.kernel.org/r/20190209161919.32350-1-changbin.du@gmail.com

Signed-off-by: Changbin Du <changbin.du@gmail.com>
Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
2019-02-11 14:53:43 -05:00
..
blktrace.c
blkcg: remove bio->bi_css and instead use bio->bi_blkg
2018-12-07 22:26:37 -07:00
bpf_trace.c
Remove 'type' argument from access_ok() function
2019-01-03 18:57:57 -08:00
fgraph.c
tracing: Fix ftrace_graph_get_ret_stack() to use task and not current
2018-12-22 08:21:03 -05:00
ftrace_internal.h
ftrace: Create new ftrace_internal.h header
2018-12-08 20:54:06 -05:00
ftrace.c
Merge tag 'trace-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2018-12-31 11:46:59 -08:00
Kconfig
tracing: Use dyn_event framework for synthetic events
2018-12-08 20:54:10 -05:00
Makefile
tracing: Add unified dynamic event framework
2018-12-08 20:54:09 -05:00
power-traces.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
preemptirq_delay_test.c
tracing: Use trace_clock_local() for looping in preemptirq_delay_test.c
2018-10-17 15:35:33 -04:00
ring_buffer_benchmark.c
tracing: Add SPDX License format tags to tracing files
2018-08-16 19:08:06 -04:00
ring_buffer.c
ring-buffer: Remove unused function ring_buffer_page_len()
2019-02-06 11:58:33 -05:00
rpm-traces.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_benchmark.c
rcu: Rename cond_resched_rcu_qs() to cond_resched_tasks_rcu_qs()
2018-05-15 10:27:29 -07:00
trace_benchmark.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00
trace_branch.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_clock.c
tracing: Add SPDX License format tags to tracing files
2018-08-16 19:08:06 -04:00
trace_dynevent.c
tracing: Add generic event-name based remove event method
2018-12-10 12:22:44 -05:00
trace_dynevent.h
tracing: Add unified dynamic event framework
2018-12-08 20:54:09 -05:00
trace_entries.h
tracing: Change the function format to display function names by perf
2019-02-11 14:53:43 -05:00
trace_event_perf.c
trace_uprobe: support reference counter in fd-based uprobe
2018-10-10 22:14:17 -04:00
trace_events_filter_test.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00
trace_events_filter.c
tracing: Add comment to predicate_parse() about "&&" or "||"
2019-02-06 11:56:19 -05:00
trace_events_hist.c
tracing: Have the historgram use the result of str_has_prefix() for len of prefix
2018-12-22 22:52:09 -05:00
trace_events_trigger.c
tracing: Fix memory leak in set_trigger_filter()
2018-12-11 13:50:19 -05:00
trace_events.c
tracing: Use str_has_prefix() instead of using fixed sizes
2018-12-22 22:51:54 -05:00
trace_export.c
tracing: Add trigger file for trace_markers tracefs/ftrace/print
2018-05-29 08:28:53 -04:00
trace_functions_graph.c
tracing: Put a margin between flags and duration for wakeup tracers
2019-02-06 11:56:19 -05:00
trace_functions.c
tracing: Update stack trace skipping for ORC unwinder
2018-01-23 15:57:00 -05:00
trace_hwlat.c
tracing: Add SPDX License format tags to tracing files
2018-08-16 19:08:06 -04:00
trace_irqsoff.c
function_graph: Support displaying relative timestamp
2019-02-06 11:56:18 -05:00
trace_kdb.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_kprobe_selftest.c
selftest/ftrace: Move kprobe selftest function to separate compile unit
2018-07-30 18:41:04 -04:00
trace_kprobe_selftest.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00
trace_kprobe.c
tracing/kprobes: Fix NULL pointer dereference in trace_kprobe_create()
2019-01-15 11:33:45 -05:00
trace_mmiotrace.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_nop.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_output.c
tracing: Simplify printf'ing in seq_print_sym
2018-12-22 08:21:06 -05:00
trace_output.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00
trace_preemptirq.c
tracing: More reverting of "tracing: Centralize preemptirq tracepoints and unify their usage"
2018-08-10 15:12:00 -04:00
trace_printk.c
tracing: Trivia spelling fix containerof() -> container_of()
2018-09-26 12:21:00 +03:00
trace_probe_tmpl.h
tracing: probeevent: Add array type support
2018-10-10 22:19:10 -04:00
trace_probe.c
tracing: Annotate implicit fall through in parse_probe_arg()
2019-02-06 11:56:18 -05:00
trace_probe.h
tracing/kprobes: Use dyn_event framework for kprobe events
2018-12-08 20:54:09 -05:00
trace_sched_switch.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_sched_wakeup.c
tracing: Show stacktrace for wakeup tracers
2019-02-06 11:56:19 -05:00
trace_selftest_dynamic.c
ftrace: Mark function tracer test functions noinline/noclone
2018-01-23 15:57:29 -05:00
trace_selftest.c
fgraph: Add new fgraph_ops structure to enable function graph hooks
2018-12-08 20:54:07 -05:00
trace_seq.c
tracing: Add SPDX License format tags to tracing files
2018-08-16 19:08:06 -04:00
trace_stack.c
tracing: Use the return of str_has_prefix() to remove open coded numbers
2018-12-22 22:52:30 -05:00
trace_stat.c
License cleanup: add SPDX GPL-2.0 license identifier to files with no license
2017-11-02 11:10:55 +01:00
trace_stat.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00
trace_syscalls.c
Merge tag 'trace-v4.15' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2017-11-17 14:58:01 -08:00
trace_uprobe.c
tracing: Consolidate trace_add/remove_event_call back to the nolock functions
2018-12-10 12:22:10 -05:00
trace.c
Merge tag 'trace-v4.21' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-trace
2018-12-31 11:46:59 -08:00
trace.h
function_graph: Support displaying relative timestamp
2019-02-06 11:56:18 -05:00
tracing_map.c
tracing: Add SPDX License format tags to tracing files
2018-08-16 19:08:06 -04:00
tracing_map.h
tracing: Fix SPDX format headers to use C++ style comments
2018-08-16 19:08:06 -04:00