linux-kernel - [PATCH 2/4] perf intel-pt: Do not try to queue auxtrace data on pipe

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Message-Id: <20230127001951.3432374-3-namhyung@kernel.org>
Date:   Thu, 26 Jan 2023 16:19:49 -0800
From:   Namhyung Kim <namhyung@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        Jiri Olsa <jolsa@...nel.org>,
        Adrian Hunter <adrian.hunter@...el.com>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <peterz@...radead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Ian Rogers <irogers@...gle.com>,
        linux-perf-users@...r.kernel.org, Leo Yan <leo.yan@...aro.org>,
        James Clark <james.clark@....com>,
        Stephane Eranian <eranian@...gle.com>
Subject: [PATCH 2/4] perf intel-pt: Do not try to queue auxtrace data on pipe

When it processes AUXTRACE_INFO, it calls to auxtrace_queue_data() to
collect AUXTRACE data first.  That won't work with pipe since it needs
lseek() to read the scattered aux data.

  $ perf record -o- -e intel_pt// true | perf report -i- --itrace=i100
  # To display the perf.data header info, please use --header/--header-only options.
  #
  0x4118 [0xa0]: failed to process type: 70
  Error:
  failed to process sample

For the pipe mode, it can handle the aux data as it gets.

Fixes: dbd134322e74 ("perf intel-pt: Add support for decoding AUX area samples")
Signed-off-by: Namhyung Kim <namhyung@...nel.org>
---
 tools/perf/util/auxtrace.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/tools/perf/util/auxtrace.c b/tools/perf/util/auxtrace.c
index c2e323cd7d49..d4b04fa07a11 100644
--- a/tools/perf/util/auxtrace.c
+++ b/tools/perf/util/auxtrace.c
@@ -1133,6 +1133,9 @@ int auxtrace_queue_data(struct perf_session *session, bool samples, bool events)
 	if (auxtrace__dont_decode(session))
 		return 0;
 
+	if (perf_data__is_pipe(session->data))
+		return 0;
+
 	if (!session->auxtrace || !session->auxtrace->queue_data)
 		return -EINVAL;
 
-- 
2.39.1.456.gfc5497dd1b-goog