linux-kernel - [PATCH 11/13] perf scripting python: Update documentation for srcline etc

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Message-Id: <20210530192308.7382-12-adrian.hunter@intel.com>
Date:   Sun, 30 May 2021 22:23:06 +0300
From:   Adrian Hunter <adrian.hunter@...el.com>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...hat.com>, Andi Kleen <ak@...ux.intel.com>
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH 11/13] perf scripting python: Update documentation for srcline etc

Add new fields and functions to the perf-script-python documentation.

Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
---
 .../perf/Documentation/perf-script-python.txt | 46 +++++++++++++++++--
 1 file changed, 42 insertions(+), 4 deletions(-)

diff --git a/tools/perf/Documentation/perf-script-python.txt b/tools/perf/Documentation/perf-script-python.txt
index 0fb9eda3cbca..5e43cfa5ea1e 100644
--- a/tools/perf/Documentation/perf-script-python.txt
+++ b/tools/perf/Documentation/perf-script-python.txt
@@ -550,6 +550,27 @@ def trace_unhandled(event_name, context, event_fields_dict):
     pass
 ----
 
+*process_event*, if defined, is called for any non-tracepoint event
+
+----
+def process_event(param_dict):
+    pass
+----
+
+*context_switch*, if defined, is called for any context switch
+
+----
+def context_switch(ts, cpu, pid, tid, np_pid, np_tid, machine_pid, out, out_preempt, *x):
+    pass
+----
+
+*auxtrace_error*, if defined, is called for any AUX area tracing error
+
+----
+def auxtrace_error(typ, code, cpu, pid, tid, ip, ts, msg, cpumode, *x):
+    pass
+----
+
 The remaining sections provide descriptions of each of the available
 built-in perf script Python modules and their associated functions.
 
@@ -592,12 +613,18 @@ common, but need to be made accessible to user scripts nonetheless.
 perf_trace_context defines a set of functions that can be used to
 access this data in the context of the current event.  Each of these
 functions expects a context variable, which is the same as the
-context variable passed into every event handler as the second
-argument.
+context variable passed into every tracepoint event handler as the second
+argument. For non-tracepoint events, the context variable is also present
+as perf_trace_context.perf_script_context .
 
  common_pc(context) - returns common_preempt count for the current event
  common_flags(context) - returns common_flags for the current event
  common_lock_depth(context) - returns common_lock_depth for the current event
+ perf_sample_insn(context) - returns the machine code instruction
+ perf_set_itrace_options(context, itrace_options) - set --itrace options if they have not been set already
+ perf_sample_srcline(context) - returns source_file_name, line_number
+ perf_sample_srccode(context) - returns source_file_name, line_number, source_line
+
 
 Util.py Module
 ~~~~~~~~~~~~~~
@@ -616,9 +643,20 @@ SUPPORTED FIELDS
 Currently supported fields:
 
 ev_name, comm, pid, tid, cpu, ip, time, period, phys_addr, addr,
-symbol, dso, time_enabled, time_running, values, callchain,
+symbol, symoff, dso, time_enabled, time_running, values, callchain,
 brstack, brstacksym, datasrc, datasrc_decode, iregs, uregs,
-weight, transaction, raw_buf, attr.
+weight, transaction, raw_buf, attr, cpumode.
+
+Fields that may also be present:
+
+ flags - sample flags
+ flags_disp - sample flags display
+ insn_cnt - instruction count for determining instructions-per-cycle (IPC)
+ cyc_cnt - cycle count for determining IPC
+ addr_correlates_sym - addr can correlate to a symbol
+ addr_dso - addr dso
+ addr_symbol - addr symbol
+ addr_symoff - addr symbol offset
 
 Some fields have sub items:
 
-- 
2.17.1