perf record: Make per-cpu mmaps the default.

This affects the -p, -t and -u options that previously defaulted to
per-thread mmaps.

Consequently add an option to select per-thread mmaps to support the old
behaviour.

Note that per-thread can be used with a workload-only (i.e. none of -p,
-t, -u, -a or -C is selected) to get a per-thread mmap with no
inheritance.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Acked-by: Ingo Molnar <mingo@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Namhyung Kim <namhyung@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/5286271D.3020808@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/tools/perf/util/target.h b/tools/perf/util/target.h
index 2d0c50690892..31dd2e9a27d0 100644
--- a/tools/perf/util/target.h
+++ b/tools/perf/util/target.h
@@ -12,7 +12,8 @@ struct target {
         uid_t        uid;
         bool         system_wide;
         bool         uses_mmap;
-        bool         force_per_cpu;
+        bool         default_per_cpu;
+        bool         per_thread;
 };
 
 enum target_errno {
@@ -33,6 +34,7 @@ enum target_errno {
         TARGET_ERRNO__UID_OVERRIDE_CPU,
         TARGET_ERRNO__PID_OVERRIDE_SYSTEM,
         TARGET_ERRNO__UID_OVERRIDE_SYSTEM,
+        TARGET_ERRNO__SYSTEM_OVERRIDE_THREAD,
 
         /* for target__parse_uid() */
         TARGET_ERRNO__INVALID_UID,