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perf session: Don't rely on evlist in pipe mode

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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>
This commit is contained in:
David Carrillo-Cisneros 2017-04-10 13:14:30 -07:00 committed by Arnaldo Carvalho de Melo
parent 6ab11f3a35
commit 0973ad97c1
1 changed files with 13 additions and 3 deletions
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12
tools/perf/util/session.c
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@ -140,9 +140,15 @@ struct perf_session *perf_session__new(struct perf_data_file *file,
if (perf_session__open(session) < 0)
goto out_close;
/*
* 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;
}
@ -156,7 +162,11 @@ 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;