linux-kernel - [PATCH v2 0/3] perf cs-etm: Handle valid-but-zero timestamps

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Message-Id: <20210513143520.22694-1-james.clark@arm.com>
Date:   Thu, 13 May 2021 17:35:17 +0300
From:   James Clark <james.clark@....com>
To:     coresight@...ts.linaro.org, leo.yan@...aro.org
Cc:     al.grant@....com, branislav.rankov@....com, denik@...omium.org,
        suzuki.poulose@....com, anshuman.khandual@....com,
        James Clark <james.clark@....com>,
        Mike Leach <mike.leach@...aro.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.com>,
        Namhyung Kim <namhyung@...nel.org>,
        John Garry <john.garry@...wei.com>,
        Will Deacon <will@...nel.org>,
        Mathieu Poirier <mathieu.poirier@...aro.org>,
        linux-arm-kernel@...ts.infradead.org,
        linux-perf-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 0/3] perf cs-etm: Handle valid-but-zero timestamps

This patchset is an alternate solution to the original: "[RFC PATCH]
perf cs-etm: Handle valid-but-zero timestamps". It uses the existing
Z option to --itrace instead of modifying the behaviour of the
cs_etm__etmq_get_timestamp() function.

Using timeless mode is equivalent to ignoring 0 timestamps, as
suggested by Mike and Leo.

It applies on top of "[PATCH v3 0/2] perf cs-etm: Set time on
synthesised samples to preserve ordering"

James Clark (3):
  perf cs-etm: Move synth_opts initialisation
  perf cs-etm: Start reading 'Z' --itrace option
  perf cs-etm: Prevent and warn on underflows during timestamp
    calculation.

 .../perf/util/cs-etm-decoder/cs-etm-decoder.c | 45 ++++++++++++++-----
 tools/perf/util/cs-etm.c                      | 20 +++++----
 2 files changed, 46 insertions(+), 19 deletions(-)

-- 
2.28.0