perf record: Add --sample-cpu option

Adding --sample-cpu option to be able to explicitly enable CPU sample
type. Currently it's only enable implicitly in case the target is cpu
related.

It will be useful for following c2c record tool.

Signed-off-by: Jiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1470074555-24889-8-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

diff --git a/tools/perf/Documentation/perf-record.txt b/tools/perf/Documentation/perf-record.txt
index 69966ab..379a2be 100644 (file)
--- a/tools/perf/Documentation/perf-record.txt
+++ b/tools/perf/Documentation/perf-record.txt
@@ -192,6 +192,9 @@ OPTIONS
 --period::
        Record the sample period.
 
+--sample-cpu::
+       Record the sample cpu.
+
 -n::
 --no-samples::
        Don't sample.

diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 8f2c16d..6355902 100644 (file)
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -1434,6 +1434,7 @@ struct option __record_options[] = {
        OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat,
                    "per thread counts"),
        OPT_BOOLEAN('d', "data", &record.opts.sample_address, "Record the sample addresses"),
+       OPT_BOOLEAN(0, "sample-cpu", &record.opts.sample_cpu, "Record the sample cpu"),
        OPT_BOOLEAN_SET('T', "timestamp", &record.opts.sample_time,
                        &record.opts.sample_time_set,
                        "Record the sample timestamps"),

diff --git a/tools/perf/perf.h b/tools/perf/perf.h
index a7e0f14..cb0f135 100644 (file)
--- a/tools/perf/perf.h
+++ b/tools/perf/perf.h
@@ -52,6 +52,7 @@ struct record_opts {
        bool         sample_weight;
        bool         sample_time;
        bool         sample_time_set;
+       bool         sample_cpu;
        bool         period;
        bool         running_time;
        bool         full_auxtrace;

diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c
index 4c2b31d..d9b80ef 100644 (file)
--- a/tools/perf/util/evsel.c
+++ b/tools/perf/util/evsel.c
@@ -882,7 +882,7 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts,
                perf_evsel__set_sample_bit(evsel, REGS_INTR);
        }
 
-       if (target__has_cpu(&opts->target))
+       if (target__has_cpu(&opts->target) || opts->sample_cpu)
                perf_evsel__set_sample_bit(evsel, CPU);
 
        if (opts->period)