android_kernel_xiaomi_sm8350/include/trace/events
Ingo Molnar 434a83c3fb events: Harmonize event field names and print output names
Now that we can filter based on fields via perf record, people
will start using filter expressions and will expect them to
be obvious.

The primary way to see which fields are available is by looking
at the trace output, such as:

  gcc-18676 [000]   343.011728: irq_handler_entry: irq=0 handler=timer
  cc1-18677 [000]   343.012727: irq_handler_entry: irq=0 handler=timer
  cc1-18677 [000]   343.032692: irq_handler_entry: irq=0 handler=timer
  cc1-18677 [000]   343.033690: irq_handler_entry: irq=0 handler=timer
  cc1-18677 [000]   343.034687: irq_handler_entry: irq=0 handler=timer
  cc1-18677 [000]   343.035686: irq_handler_entry: irq=0 handler=timer
  cc1-18677 [000]   343.036684: irq_handler_entry: irq=0 handler=timer

While 'irq==0' filters work, the 'handler==<x>' filter expression
does not work:

  $ perf record -R -f -a -e irq:irq_handler_entry --filter handler=timer sleep 1
   Error: failed to set filter with 22 (Invalid argument)

The problem is that while an 'irq' field exists and is recognized
as a filter field - 'handler' does not exist - its name is 'name'
in the output.

To solve this, we need to synchronize the printout and the field
names, wherever possible.

In cases where the printout prints a non-field, we enclose
that information in square brackets, such as:

  perf-1380  [013]   724.903505: softirq_exit: vec=9 [action=RCU]
  perf-1380  [013]   724.904482: softirq_exit: vec=1 [action=TIMER]

This way users can use filter expressions more intuitively: all
fields that show up as 'primary' (non-bracketed) information is
filterable.

This patch harmonizes the field names for all irq, bkl, power,
sched and timer events.

We might in fact think about dropping the print format bit of
generic tracepoints altogether, and just print the fields that
are being recorded.

Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
LKML-Reference: <new-submission>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-10-15 12:42:03 +02:00
..
bkl.h events: Harmonize event field names and print output names 2009-10-15 12:42:03 +02:00
block.h Add a tracepoint for block request remapping 2009-10-01 21:19:34 +02:00
ext4.h ext4: Add a stub for mpage_da_data in the trace header 2009-09-30 00:51:22 -04:00
irq.h events: Harmonize event field names and print output names 2009-10-15 12:42:03 +02:00
jbd2.h jbd2: Use tracepoints for history file 2009-09-30 00:32:06 -04:00
kmem.h tracing, page-allocator: add trace event for page traffic related to the buddy lists 2009-09-22 07:17:34 -07:00
kvm.h KVM: Add trace points in irqchip code 2009-09-10 08:33:11 +03:00
lockdep.h tracing/events: Move TRACE_SYSTEM outside of include guard 2009-07-13 10:59:55 +02:00
module.h tracing/events: Add module tracepoints 2009-08-17 11:25:08 +02:00
napi.h
power.h events: Harmonize event field names and print output names 2009-10-15 12:42:03 +02:00
sched.h events: Harmonize event field names and print output names 2009-10-15 12:42:03 +02:00
skb.h net: skb ftracer - add tracepoint to skb_copy_datagram_iovec (v3) 2009-08-13 16:26:14 -07:00
syscalls.h tracing: Create generic syscall TRACE_EVENTs 2009-08-26 00:41:48 +02:00
timer.h events: Harmonize event field names and print output names 2009-10-15 12:42:03 +02:00
workqueue.h tracing/workqueue: Use %pf in workqueue trace events 2009-09-22 23:14:58 +02:00