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From: "liuqi (BA)" <liuqi115@huawei.com>
To: Mathieu Poirier <mathieu.poirier@linaro.org>,
	Linuxarm <linuxarm@huawei.com>
Cc: <suzuki.poulose@arm.com>, <mike.leach@linaro.org>,
	<coresight@lists.linaro.org>, <linux-kernel@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH 1/2] Documentation: tracing: Documentation for ultrasoc SMB drivers
Date: Tue, 7 Sep 2021 11:32:43 +0800	[thread overview]
Message-ID: <58e929cf-29a6-26ec-807f-94cca17bb708@huawei.com> (raw)
In-Reply-To: <20210906173446.GD1228692@p14s>

Hi Mathieu,

On 2021/9/7 1:34, Mathieu Poirier wrote:
> On Mon, Jul 19, 2021 at 07:17:36PM +0800, Qi Liu wrote:
>> Ultrasoc trace module is a system level solution for tracing, and SMB
>> is the component in trace module to store trace message. This patch
>> brings in a documentation for ultrasoc SMB driver and simple introduces
>> how to use ultrasoc SMB by sysfs interface and perf interface.
>>
>> Signed-off-by: Qi Liu <liuqi115@huawei.com>

>> +Example usage of perf::
>> +
>> +	 $# ./perf list pmu
>> +	 cs_etm//                                    [Kernel PMU event]
>> +    $# ./perf record -e cs_etm/@sink_smb0/ -C 0 --per-thread sleep 2s
>> +    [ perf record: Woken up 2 times to write data ]
>> +    [ perf record: Captured and wrote 0.288 MB perf.data ]
>> +    $# ./perf report
> 
> This IP block works like any other sink device and as such I don't really see a
> need for this documentation - especially since it is mostly conveying the same
> information already present in coresight.rst.
> 

Yes, smb works as a sink device.
got it, I'll drop this documentation next time.

Thanks,
Qi

> Thanks,
> Mathieu
> >> --
>> 2.17.1
>>
> .
> 


WARNING: multiple messages have this Message-ID (diff)
From: "liuqi (BA)" <liuqi115@huawei.com>
To: Mathieu Poirier <mathieu.poirier@linaro.org>,
	Linuxarm <linuxarm@huawei.com>
Cc: <suzuki.poulose@arm.com>, <mike.leach@linaro.org>,
	<coresight@lists.linaro.org>, <linux-kernel@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>
Subject: Re: [PATCH 1/2] Documentation: tracing: Documentation for ultrasoc SMB drivers
Date: Tue, 7 Sep 2021 11:32:43 +0800	[thread overview]
Message-ID: <58e929cf-29a6-26ec-807f-94cca17bb708@huawei.com> (raw)
In-Reply-To: <20210906173446.GD1228692@p14s>

Hi Mathieu,

On 2021/9/7 1:34, Mathieu Poirier wrote:
> On Mon, Jul 19, 2021 at 07:17:36PM +0800, Qi Liu wrote:
>> Ultrasoc trace module is a system level solution for tracing, and SMB
>> is the component in trace module to store trace message. This patch
>> brings in a documentation for ultrasoc SMB driver and simple introduces
>> how to use ultrasoc SMB by sysfs interface and perf interface.
>>
>> Signed-off-by: Qi Liu <liuqi115@huawei.com>

>> +Example usage of perf::
>> +
>> +	 $# ./perf list pmu
>> +	 cs_etm//                                    [Kernel PMU event]
>> +    $# ./perf record -e cs_etm/@sink_smb0/ -C 0 --per-thread sleep 2s
>> +    [ perf record: Woken up 2 times to write data ]
>> +    [ perf record: Captured and wrote 0.288 MB perf.data ]
>> +    $# ./perf report
> 
> This IP block works like any other sink device and as such I don't really see a
> need for this documentation - especially since it is mostly conveying the same
> information already present in coresight.rst.
> 

Yes, smb works as a sink device.
got it, I'll drop this documentation next time.

Thanks,
Qi

> Thanks,
> Mathieu
> >> --
>> 2.17.1
>>
> .
> 


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  reply	other threads:[~2021-09-07  3:32 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-19 11:17 [PATCH 0/2] coresight: ultrasoc: Add support for System Memory Buffer device Qi Liu
2021-07-19 11:17 ` Qi Liu
2021-07-19 11:17 ` [PATCH 1/2] Documentation: tracing: Documentation for ultrasoc SMB drivers Qi Liu
2021-07-19 11:17   ` Qi Liu
2021-09-06 17:34   ` Mathieu Poirier
2021-09-06 17:34     ` Mathieu Poirier
2021-09-07  3:32     ` liuqi (BA) [this message]
2021-09-07  3:32       ` liuqi (BA)
2021-07-19 11:17 ` [PATCH 2/2] coresight: ultrasoc: Add System Memory Buffer driver Qi Liu
2021-07-19 11:17   ` Qi Liu
2021-09-06 17:30   ` Mathieu Poirier
2021-09-06 17:30     ` Mathieu Poirier
2021-09-07  9:32     ` liuqi (BA)
2021-09-07  9:32       ` liuqi (BA)
2021-08-04  8:05 ` [PATCH 0/2] coresight: ultrasoc: Add support for System Memory Buffer device liuqi (BA)
2021-08-04  8:05   ` liuqi (BA)
2021-08-04 14:31   ` Mathieu Poirier
2021-08-04 14:31     ` Mathieu Poirier
2021-08-05  8:01     ` liuqi (BA)
2021-08-05  8:01       ` liuqi (BA)
2021-09-02 17:51 ` Mathieu Poirier
2021-09-02 17:51   ` Mathieu Poirier

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