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Date: Wed, 11 Dec 2013 14:36:59 +0200
From: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
To: Peter Zijlstra <a.p.zijlstra@...llo.nl>,
Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc: Ingo Molnar <mingo@...hat.com>, linux-kernel@...r.kernel.org,
David Ahern <dsahern@...il.com>,
Frederic Weisbecker <fweisbec@...il.com>,
Jiri Olsa <jolsa@...hat.com>, Mike Galbraith <efault@....de>,
Namhyung Kim <namhyung@...il.com>,
Paul Mackerras <paulus@...ba.org>,
Stephane Eranian <eranian@...gle.com>,
Andi Kleen <ak@...ux.intel.com>,
Adrian Hunter <adrian.hunter@...el.com>
Subject: [PATCH v0 47/71] perf session: Add Instruction Tracing options
From: Adrian Hunter <adrian.hunter@...el.com>
Instruction Trace decoding synthesizes
"instructions" and "branches" events.
Add options for that.
Signed-off-by: Adrian Hunter <adrian.hunter@...el.com>
---
tools/perf/util/itrace.c | 100 ++++++++++++++++++++++++++++++++++++++++++++++
tools/perf/util/itrace.h | 33 +++++++++++++++
tools/perf/util/session.h | 2 +
3 files changed, 135 insertions(+)
diff --git a/tools/perf/util/itrace.c b/tools/perf/util/itrace.c
index 9596cc2..b80411d 100644
--- a/tools/perf/util/itrace.c
+++ b/tools/perf/util/itrace.c
@@ -38,6 +38,7 @@
#include "event.h"
#include "debug.h"
+#include "parse-options.h"
int itrace_mmap__mmap(struct itrace_mmap *mm, struct itrace_mmap_params *mp,
int fd)
@@ -210,6 +211,105 @@ int perf_event__synthesize_itrace(struct perf_tool *tool,
return process(tool, &ev, NULL, NULL);
}
+#define PERF_ITRACE_DEFAULT_PERIOD_TYPE PERF_ITRACE_PERIOD_INSTRUCTIONS
+#define PERF_ITRACE_DEFAULT_PERIOD 1000
+
+void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts)
+{
+ synth_opts->instructions = true;
+ synth_opts->branches = true;
+ synth_opts->errors = true;
+ synth_opts->period_type = PERF_ITRACE_DEFAULT_PERIOD_TYPE;
+ synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD;
+}
+
+int itrace_parse_synth_opts(const struct option *opt, const char *str,
+ int unset)
+{
+ struct itrace_synth_opts *synth_opts = opt->value;
+ const char *p;
+ char *endptr;
+
+ synth_opts->set = true;
+
+ if (unset) {
+ synth_opts->dont_decode = true;
+ return 0;
+ }
+
+ if (!str) {
+ itrace_synth_opts__set_default(synth_opts);
+ return 0;
+ }
+
+ for (p = str; *p;) {
+ switch (*p++) {
+ case 'i':
+ synth_opts->instructions = true;
+ while (*p == ' ' || *p == ',')
+ p += 1;
+ if (isdigit(*p)) {
+ synth_opts->period = strtoull(p, &endptr, 10);
+ p = endptr;
+ while (*p == ' ' || *p == ',')
+ p += 1;
+ switch (*p++) {
+ case 'i':
+ synth_opts->period_type =
+ PERF_ITRACE_PERIOD_INSTRUCTIONS;
+ break;
+ case 't':
+ synth_opts->period_type =
+ PERF_ITRACE_PERIOD_TICKS;
+ break;
+ case 'm':
+ synth_opts->period *= 1000;
+ /* Fall through */
+ case 'u':
+ synth_opts->period *= 1000;
+ /* Fall through */
+ case 'n':
+ if (*p++ != 's')
+ goto out_err;
+ synth_opts->period_type =
+ PERF_ITRACE_PERIOD_NANOSECS;
+ break;
+ case '\0':
+ goto out;
+ default:
+ goto out_err;
+ }
+ }
+ break;
+ case 'b':
+ synth_opts->branches = true;
+ break;
+ case 'e':
+ synth_opts->errors = true;
+ break;
+ case ' ':
+ case ',':
+ break;
+ default:
+ goto out_err;
+ }
+ }
+out:
+ if (synth_opts->instructions) {
+ if (!synth_opts->period_type)
+ synth_opts->period_type =
+ PERF_ITRACE_DEFAULT_PERIOD_TYPE;
+ if (!synth_opts->period)
+ synth_opts->period = PERF_ITRACE_DEFAULT_PERIOD;
+ }
+
+ return 0;
+
+out_err:
+ pr_err("Bad instruction trace options '%s'\n", str);
+ return -EINVAL;
+}
+
int itrace_mmap__read(struct itrace_mmap *mm, struct itrace_record *itr,
struct perf_tool *tool, process_itrace_t fn)
{
diff --git a/tools/perf/util/itrace.h b/tools/perf/util/itrace.h
index e6b0cc0..8453351 100644
--- a/tools/perf/util/itrace.h
+++ b/tools/perf/util/itrace.h
@@ -33,9 +33,39 @@ union perf_event;
struct perf_session;
struct perf_evlist;
struct perf_tool;
+struct option;
struct perf_record_opts;
struct itrace_info_event;
+enum itrace_period_type {
+ PERF_ITRACE_PERIOD_INSTRUCTIONS,
+ PERF_ITRACE_PERIOD_TICKS,
+ PERF_ITRACE_PERIOD_NANOSECS,
+};
+
+/**
+ * struct itrace_synth_opts - Instruction Tracing synthesis options.
+ * @set: indicates whether or not options have been set
+ * @inject: indicates the event (not just the sample) must be fully synthesized
+ * because 'perf inject' will write it out
+ * @instructions: whether to synthesize 'instructions' events
+ * @branches: whether to synthesize 'branches' events
+ * @errors: whether to synthesize decoder error events
+ * @dont_decode: whether to skip decoding entirely
+ * @period: 'instructions' events period
+ * @period_type: 'instructions' events period type
+ */
+struct itrace_synth_opts {
+ bool set;
+ bool inject;
+ bool instructions;
+ bool branches;
+ bool errors;
+ bool dont_decode;
+ unsigned long long period;
+ enum itrace_period_type period_type;
+};
+
struct itrace {
int (*process_event)(struct perf_session *session,
union perf_event *event,
@@ -176,6 +206,9 @@ int perf_event__synthesize_itrace(struct perf_tool *tool,
perf_event__handler_t process,
size_t size, u64 offset, u64 ref, int idx,
u32 tid, u32 cpu);
+int itrace_parse_synth_opts(const struct option *opt, const char *str,
+ int unset);
+void itrace_synth_opts__set_default(struct itrace_synth_opts *synth_opts);
static inline int itrace__process_event(struct perf_session *session,
union perf_event *event,
diff --git a/tools/perf/util/session.h b/tools/perf/util/session.h
index 9000193..a7873c0 100644
--- a/tools/perf/util/session.h
+++ b/tools/perf/util/session.h
@@ -30,12 +30,14 @@ struct ordered_samples {
};
struct itrace;
+struct itrace_synth_opts;
struct perf_session {
struct perf_header header;
struct machines machines;
struct perf_evlist *evlist;
struct itrace *itrace;
+ struct itrace_synth_opts *itrace_synth_opts;
struct trace_event tevent;
struct events_stats stats;
bool repipe;
--
1.8.5.1
--
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