From: David Carrillo-Cisneros davidcc@google.com
[ Upstream commit 0973ad97c187e06aece61f685b9c3b2d93290a73 ]
Session sets a number parameters that rely on evlist. These parameters are not used in pipe-mode and should not be set, since evlist is unavailable. Fix that.
Signed-off-by: David Carrillo-Cisneros davidcc@google.com Acked-by: Jiri Olsa jolsa@kernel.org Cc: Alexander Shishkin alexander.shishkin@linux.intel.com Cc: Andi Kleen ak@linux.intel.com Cc: He Kuang hekuang@huawei.com Cc: Masami Hiramatsu mhiramat@kernel.org Cc: Paul Turner pjt@google.com Cc: Peter Zijlstra peterz@infradead.org Cc: Simon Que sque@chromium.org Cc: Stephane Eranian eranian@google.com Cc: Wang Nan wangnan0@huawei.com Link: http://lkml.kernel.org/r/20170410201432.24807-6-davidcc@google.com [ Check if file != NULL in perf_session__new(), like when used by builtin-top.c ] Signed-off-by: Arnaldo Carvalho de Melo acme@redhat.com Signed-off-by: Sasha Levin alexander.levin@microsoft.com --- tools/perf/util/session.c | 16 +++++++++++++--- 1 file changed, 13 insertions(+), 3 deletions(-)
diff --git a/tools/perf/util/session.c b/tools/perf/util/session.c index 97b4822fe7f0..7e0573e55a35 100644 --- a/tools/perf/util/session.c +++ b/tools/perf/util/session.c @@ -139,8 +139,14 @@ struct perf_session *perf_session__new(struct perf_data_file *file, if (perf_session__open(session) < 0) goto out_close;
- perf_session__set_id_hdr_size(session); - perf_session__set_comm_exec(session); + /* + * set session attributes that are present in perf.data + * but not in pipe-mode. + */ + if (!file->is_pipe) { + perf_session__set_id_hdr_size(session); + perf_session__set_comm_exec(session); + } } } else { session->machines.host.env = &perf_env; @@ -155,7 +161,11 @@ struct perf_session *perf_session__new(struct perf_data_file *file, pr_warning("Cannot read kernel map\n"); }
- if (tool && tool->ordering_requires_timestamps && + /* + * In pipe-mode, evlist is empty until PERF_RECORD_HEADER_ATTR is + * processed, so perf_evlist__sample_id_all is not meaningful here. + */ + if ((!file || !file->is_pipe) && tool && tool->ordering_requires_timestamps && tool->ordered_events && !perf_evlist__sample_id_all(session->evlist)) { dump_printf("WARNING: No sample_id_all support, falling back to unordered processing\n"); tool->ordered_events = false;