Messages in this thread | | | Date | Mon, 2 Aug 2021 23:17:10 +0800 | From | Leo Yan <> | Subject | Re: [RFC PATCH 5/6] perf cs-etm: Improve Coresight zero timestamp warning |
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On Thu, Jul 29, 2021 at 04:58:04PM +0100, James Clark wrote: > Only show the warning if the user hasn't already set timeless mode and > improve the text because there was ambiguity around the meaning of '...' > > Change the warning to a UI warning instead of printing straight to > stderr because this corrupts the UI when perf report TUI is used. The UI > warning function also handles printing to stderr when in perf script > mode. > > Suggested-by: Leo Yan <leo.yan@linaro.org> > Signed-off-by: James Clark <james.clark@arm.com>
Reviewed-by: Leo Yan <leo.yan@linaro.org>
> --- > tools/perf/util/cs-etm-decoder/cs-etm-decoder.c | 7 +++++-- > 1 file changed, 5 insertions(+), 2 deletions(-) > > diff --git a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c > index 3e1a05bc82cc..5084bd2ca6eb 100644 > --- a/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c > +++ b/tools/perf/util/cs-etm-decoder/cs-etm-decoder.c > @@ -324,8 +324,11 @@ cs_etm_decoder__do_hard_timestamp(struct cs_etm_queue *etmq, > * underflow. > */ > packet_queue->cs_timestamp = 0; > - WARN_ONCE(true, "Zero Coresight timestamp found at Idx:%" OCSD_TRC_IDX_STR > - ". Decoding may be improved with --itrace=Z...\n", indx); > + if (!cs_etm__etmq_is_timeless(etmq)) > + pr_warning_once("Zero Coresight timestamp found at Idx:%" OCSD_TRC_IDX_STR > + ". Decoding may be improved by prepending 'Z' to your current --itrace arguments.\n", > + indx); > + > } else if (packet_queue->instr_count > elem->timestamp) { > /* > * Sanity check that the elem->timestamp - packet_queue->instr_count would not > -- > 2.28.0 >
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