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__get_str(str)'s definition includes a (char *) operator
overloading that is not protected with outer ().
This patch adds () around __get_str()'s definition, enabling
some code cleanup.
Link: http://lkml.kernel.org/r/20ac1a10c2ec4ccd23e4a8ef34101fb6e4157d37.1467407618.git.bristot@redhat.com
Cc: Trond Myklebust <trond.myklebust@primarydata.com>
Cc: Anna Schumaker <anna.schumaker@netapp.com>
Cc: Ingo Molnar <mingo@redhat.com>
Suggested-by: Steven Rostedt <rostedt@goodmis.org>
Reviewed-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Daniel Bristot de Oliveira <bristot@redhat.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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now all calls to perf_trace_buf_submit() pass 0 as 4th
argument which will be repurposed in the next patch which will
change the meaning of 1st arg of perf_tp_event() to event_type
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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TRACE_EVENT_FN can't be used in some circumstances
like invoking trace functions from offlined CPU due
to RCU usage.
This patch adds the TRACE_EVENT_FN_COND macro
to make such trace points conditional.
Link: http://lkml.kernel.org/r/1450124286-4822-1-git-send-email-kda@linux-powerpc.org
Signed-off-by: Denis Kirjanov <kda@linux-powerpc.org>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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Commit ee53bbd17257 "tracing: Move the perf code out of trace_event.h" moved
more than just the perf code out of trace_event.h, but also removed a bit of
the tracing code too. Move it back.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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The name "ftrace" really refers to the function hook infrastructure. It
is not about the trace_events. The function ftrace_get_offsets_##call()
is used to find the offset into dynamically allocated trace event fields
for printing. It has nothing to do with function tracing. Rename it.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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trace_event_define_fields_##call()
The name "ftrace" really refers to the function hook infrastructure. It
is not about the trace_events. The function ftrace_define_fields_##call()
is used to define how to process the trace_event fields. It has nothing to
do with function tracing. Rename it.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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The name "ftrace" really refers to the function hook infrastructure. It
is not about the trace_events. The structure ftrace_event_type_funcs_##call
is used to define how the trace_events will be printed. It has nothing to
do with function tracing. Rename it.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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The name "ftrace" really refers to the function hook infrastructure. It
is not about the trace_events. The structure ftrace_data_offset_##call is
used to find the offsets of dynamically allocated fields in trace_events.
It has nothing to do with function tracing. Rename it.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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The name "ftrace" really refers to the function hook infrastructure. It
is not about the trace_events. The ftrace_raw_##call structures are built
by macros for trace events. They have nothing to do with function tracing.
Rename them.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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The name "ftrace" really refers to the function hook infrastructure. It
is not about the trace_events. The ftrace_output_*() and ftrace_raw_output_*()
functions represent the trace_event code. Rename them to just trace_output
or trace_raw_output.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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The name "ftrace" really refers to the function hook infrastructure. It
is not about the trace_events. The structures ftrace_event_call and
ftrace_event_class have nothing to do with the function hooks, and are
really trace_event structures. Rename ftrace_event_* to trace_event_*.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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The name "ftrace" really refers to the function hook infrastructure. It
is not about the trace_events. The functions ftrace_print_*() are not part of
the function infrastructure, and the names can be confusing. Rename them
to be trace_print_*().
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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The term "ftrace" is really the infrastructure of the function hooks,
and not the trace events. Rename ftrace_event.h to trace_events.h to
represent the trace_event infrastructure and decouple the term ftrace
from it.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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The trace_event.h file is for the generic trace event code. Move
the perf related code into its own trace header file perf.h
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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The name "ftrace" really refers to the function hook infrastructure. It
is not about the TRACE_EVENT() macros. The file trace/ftrace.h was originally
written to be mostly focused toward the "ftrace" code (that in kernel/trace/)
but ended up being generic and used by perf and others.
Rename the file to be less confusing about what infrastructure it belongs to.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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This patch moves the ftrace creation into include/trace/ftrace.h and
simplifies the work of developers in adding new tracepoints.
Just the act of creating the trace points in include/trace and including
define_trace.h will create the events in the debugfs/tracing/events
directory.
This patch removes the need of include/trace/trace_events.h
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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TRACE_EVENT is a more generic way to define tracepoints.
Doing so adds these new capabilities to this tracepoint:
- zero-copy and per-cpu splice() tracing
- binary tracing without printf overhead
- structured logging records exposed under /debug/tracing/events
- trace events embedded in function tracer output and other plugins
- user-defined, per tracepoint filter expressions
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Acked-by: Eduard - Gabriel Munteanu <eduard.munteanu@linux360.ro>
Acked-by: Pekka Enberg <penberg@cs.helsinki.fi>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <49DEE6DA.80600@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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TRACE_EVENT is a more generic way to define a tracepoint.
Doing so adds these new capabilities to this tracepoint:
- zero-copy and per-cpu splice() tracing
- binary tracing without printf overhead
- structured logging records exposed under /debug/tracing/events
- trace events embedded in function tracer output and other plugins
- user-defined, per tracepoint filter expressions
Signed-off-by: Zhao Lei <zhaolei@cn.fujitsu.com>
Acked-by: Neil Horman <nhorman@tuxdriver.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: "Steven Rostedt ;" <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <49DD90D2.5020604@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Augment the traces with lock names when lockdep is available:
1) | down_read_trylock() {
1) | _spin_lock_irqsave() {
1) | /* lock_acquire: &sem->wait_lock */
1) 4.201 us | }
1) | _spin_unlock_irqrestore() {
1) | /* lock_release: &sem->wait_lock */
1) 3.523 us | }
1) | /* lock_acquire: try read &mm->mmap_sem */
1) + 13.386 us | }
1) 1.635 us | find_vma();
1) | handle_mm_fault() {
1) | __do_fault() {
1) | filemap_fault() {
1) | find_lock_page() {
1) | find_get_page() {
1) | /* lock_acquire: read rcu_read_lock */
1) | /* lock_release: rcu_read_lock */
1) 5.697 us | }
1) 8.158 us | }
1) + 11.079 us | }
1) | _spin_lock() {
1) | /* lock_acquire: __pte_lockptr(page) */
1) 3.949 us | }
1) 1.460 us | page_add_file_rmap();
1) | _spin_unlock() {
1) | /* lock_release: __pte_lockptr(page) */
1) 3.115 us | }
1) | unlock_page() {
1) 1.421 us | page_waitqueue();
1) 1.220 us | __wake_up_bit();
1) 6.519 us | }
1) + 34.328 us | }
1) + 37.452 us | }
1) | up_read() {
1) | /* lock_release: &mm->mmap_sem */
1) | _spin_lock_irqsave() {
1) | /* lock_acquire: &sem->wait_lock */
1) 3.865 us | }
1) | _spin_unlock_irqrestore() {
1) | /* lock_release: &sem->wait_lock */
1) 8.562 us | }
1) + 17.370 us | }
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: =?ISO-8859-1?Q?T=F6r=F6k?= Edwin <edwintorok@gmail.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <1236166375.5330.7209.camel@laptop>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
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Impact: clean up
To further facilitate the ease of adding trace points for developers, this
patch creates include/trace/trace_events.h and
include/trace/trace_event_types.h.
The former file will hold the trace/<type>.h files and the latter will hold
the trace/<type>_event_types.h files.
To create new tracepoints and to have them automatically
appear in the event tracer, a developer makes the trace/<type>.h file
which includes <linux/tracepoint.h> and the trace/<type>_event_types.h file.
The trace/<type>_event_types.h file will hold the TRACE_FORMAT
macros.
Then add the trace/<type>.h file to trace/trace_events.h,
and add the trace/<type>_event_types.h to the trace_event_types.h file.
No need to modify files elsewhere.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
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