From: James Clark <james.clark@arm.com>
To: Yang Shi <shy828301@gmail.com>, Leo Yan <leo.yan@linaro.org>
Cc: linux-perf-users@vger.kernel.org,
LAK <linux-arm-kernel@lists.infradead.org>,
coresight@lists.linaro.org,
Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
mathieu.poirier@linaro.org, adrian.hunter@intel.com,
Jiri Olsa <jolsa@kernel.org>,
acme@redhat.com, mike.leach@linaro.org,
Will Deacon <will@kernel.org>,
suzuki.poulose@arm.com, yang@os.amperecomputing.com
Subject: Re: [BUG] perf: No samples found when using kcore + coresight
Date: Tue, 28 Mar 2023 09:59:25 +0100 [thread overview]
Message-ID: <5a120a90-0b95-cfd0-beff-e9228a9d394b@arm.com> (raw)
In-Reply-To: <CAHbLzkqMZMB7sGLbJk82CpE9cssEU+WZYaXhVTVC-B40bY52jw@mail.gmail.com>
On 28/03/2023 01:53, Yang Shi wrote:
> Hi Leo,
>
> Just follow up on this one. Any update?
>
Hi Yang,
Sorry no update on this yet from me. I was just finishing off
"coresight: Fix CTI module refcount leak by making it a helper device"
which I hope to post in the next day or two and then I will start on this.
James
> Thanks,
> Yang
>
> On Mon, Mar 13, 2023 at 5:36 PM Leo Yan <leo.yan@linaro.org> wrote:
>>
>> On Mon, Mar 13, 2023 at 11:15:44AM -0700, Yang Shi wrote:
>>
>> [...]
>>
>>>> Just a quick summary, here we have two issues:
>>>>
>>>> - With command:
>>>> perf record -e cs_etm/@tmc_etf63/k --kcore --per-thread \
>>>> -- taskset --cpu-list 1 uname",
>>>>
>>>> perf doesn't enable "text poke" attribution.
>>>
>>> No, it enables "text poke" and perf fails to decode coresight trace
>>> data too. It doesn't matter whether "--kcore" is after or before "-e
>>> cs/etm/@tmc_etf63/k".
>>
>> Understand now. Thanks for correction, if so we can ignore this one.
>>
>> Leo
next prev parent reply other threads:[~2023-03-28 8:59 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-03-06 21:13 [BUG] perf: No samples found when using kcore + coresight Yang Shi
2023-03-07 10:32 ` James Clark
2023-03-07 19:45 ` Yang Shi
2023-03-08 19:56 ` Yang Shi
2023-03-09 11:38 ` Leo Yan
2023-03-09 18:06 ` Yang Shi
2023-03-13 12:14 ` Leo Yan
2023-03-13 18:15 ` Yang Shi
2023-03-14 0:36 ` Leo Yan
2023-03-28 0:53 ` Yang Shi
2023-03-28 8:59 ` James Clark [this message]
2023-03-28 16:16 ` Yang Shi
2023-03-29 16:08 ` James Clark
2023-03-29 23:25 ` Yang Shi
2023-03-30 8:17 ` James Clark
2023-03-29 16:11 ` James Clark
2023-03-30 10:36 ` James Clark
2023-03-30 19:54 ` Yang Shi
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