LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Leo Yan <leo.yan@linaro.org>
To: James Clark <james.clark@arm.com>
Cc: acme@kernel.org, mathieu.poirier@linaro.org,
	coresight@lists.linaro.org, linux-perf-users@vger.kernel.org,
	suzuki.poulose@arm.com, mike.leach@linaro.org,
	Mark Rutland <mark.rutland@arm.com>,
	Alexander Shishkin <alexander.shishkin@linux.intel.com>,
	Jiri Olsa <jolsa@redhat.com>, Namhyung Kim <namhyung@kernel.org>,
	John Garry <john.garry@huawei.com>, Will Deacon <will@kernel.org>,
	linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [RFC PATCH 5/6] perf cs-etm: Improve Coresight zero timestamp warning
Date: Mon, 2 Aug 2021 23:17:10 +0800	[thread overview]
Message-ID: <20210802151710.GB148327@leoy-ThinkPad-X240s> (raw)
In-Reply-To: <20210729155805.2830-6-james.clark@arm.com>

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
> 

  reply	other threads:[~2021-08-02 15:17 UTC|newest]

Thread overview: 18+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-29 15:57 [RFC PATCH 0/6] perf tools: Warning fixes James Clark
2021-07-29 15:58 ` [RFC PATCH 1/6] perf tools: Add WARN_ONCE equivalent for UI warnings James Clark
2021-08-02 14:44   ` Arnaldo Carvalho de Melo
2021-07-29 15:58 ` [RFC PATCH 2/6] perf tools: Re-add annotate_warned functionality James Clark
2021-07-29 15:58 ` [RFC PATCH 3/6] perf tools: Add disassembly warnings for annotate --stdio James Clark
2021-07-29 15:58 ` [RFC PATCH 4/6] perf tools: Add flag for tracking warnings of missing DSOs James Clark
2021-07-29 15:58 ` [RFC PATCH 5/6] perf cs-etm: Improve Coresight zero timestamp warning James Clark
2021-08-02 15:17   ` Leo Yan [this message]
2021-08-03 13:25     ` Arnaldo Carvalho de Melo
2021-07-29 15:58 ` [RFC PATCH 6/6] perf cs-etm: Add warnings for missing DSOs James Clark
2021-08-02 14:51   ` Arnaldo Carvalho de Melo
2021-08-02 17:03     ` Mathieu Poirier
2021-08-03  8:06       ` Mike Leach
2021-08-02 15:41   ` Leo Yan
2021-08-03 13:24     ` Arnaldo Carvalho de Melo
2021-08-03 14:01       ` Leo Yan
2021-08-05 12:59         ` James Clark
2021-08-06 18:36           ` Arnaldo Carvalho de Melo

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20210802151710.GB148327@leoy-ThinkPad-X240s \
    --to=leo.yan@linaro.org \
    --cc=acme@kernel.org \
    --cc=alexander.shishkin@linux.intel.com \
    --cc=coresight@lists.linaro.org \
    --cc=james.clark@arm.com \
    --cc=john.garry@huawei.com \
    --cc=jolsa@redhat.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=linux-perf-users@vger.kernel.org \
    --cc=mark.rutland@arm.com \
    --cc=mathieu.poirier@linaro.org \
    --cc=mike.leach@linaro.org \
    --cc=namhyung@kernel.org \
    --cc=suzuki.poulose@arm.com \
    --cc=will@kernel.org \
    --subject='Re: [RFC PATCH 5/6] perf cs-etm: Improve Coresight zero timestamp warning' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).