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Date: Fri, 24 Jan 2025 09:37:34 -0800
From: Namhyung Kim <namhyung@kernel.org>
To: Aaron Tomlin <atomlin@atomlin.com>
Cc: peterz@infradead.org, mingo@redhat.com, acme@kernel.org,
	mark.rutland@arm.com, alexander.shishkin@linux.intel.com,
	jolsa@kernel.org, irogers@google.com, adrian.hunter@intel.com,
	kan.liang@linux.intel.com, linux-perf-users@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH] perf probe: Introduce --no-advice option when a new
 event is created
Message-ID: <Z5PP3vPpYOccGWIv@google.com>
References: <20241214193452.16627-1-atomlin@atomlin.com>
 <Z5Ld5irdG--_Efgl@google.com>
 <oqon532hz5nktpgilvpmvd5ywuasppbkfw2f6z5gjluyzo62ow@n7ynrou6uykm>
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In-Reply-To: <oqon532hz5nktpgilvpmvd5ywuasppbkfw2f6z5gjluyzo62ow@n7ynrou6uykm>

On Fri, Jan 24, 2025 at 10:54:04AM +0000, Aaron Tomlin wrote:
> On Thu, Jan 23, 2025 at 04:25:10PM -0800, Namhyung Kim wrote:
> > Hello,
> 
> Hi Namhyung,
> 
> > Sorry for the late reply.
> 
> No problem at all.
> 
> > On Sat, Dec 14, 2024 at 07:34:52PM +0000, Aaron Tomlin wrote:
> > > This patch introduces a new option namely "--no-advice" to be used with
> > > the add command. Now one has the ability to avoid the generation of any
> > > advice when a new event is created. Thus making the output reasonable.
> > > For example:
> > > 
> > >   # perf probe --no-advice --add 'user_path_at%return return=$retval:s32'
> > >   Added new event:
> > >     probe:user_path_at__return (on user_path_at%return with return=$retval:s32)
> > >   #
> > 
> > Thanks for sending the patch but why do you care?  You can just ignore
> > the message.
> 
> I understand.
> 
> As a frequent and avid perf-probe user, I often only need to confirm the
> successful creation of a new event, ensuring its presence under
> /sys/kernel/debug/tracing/events/probes for subsequent use with Ftrace.
> The ability to suppress verbose output would be a valuable enhancement.
> 
> Please let me know your thoughts.

Sounds like you may want -q option to suppress all output and check the
exit code of the command.

Thanks,
Namhyung