From: David Hildenbrand <david@redhat.com>
To: Lorenzo Stoakes <lorenzo.stoakes@oracle.com>,
"Chen, Zide" <zide.chen@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Namhyung Kim <namhyung@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@kernel.org>, Ian Rogers <irogers@google.com>,
Adrian Hunter <adrian.hunter@intel.com>,
Kan Liang <kan.liang@linux.intel.com>,
linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-mm@kvack.org, Matthew Wilcox <willy@infradead.org>,
Yi Lai <yi1.lai@linux.intel.com>
Subject: Re: [PATCH v3] perf: map pages in advance
Date: Fri, 20 Dec 2024 10:56:50 +0100 [thread overview]
Message-ID: <860a1ef0-678d-414d-8511-9695b90c3ca0@redhat.com> (raw)
In-Reply-To: <4ded2d63-03dd-498e-9810-690a9eff0c22@lucifer.local>
On 20.12.24 10:31, Lorenzo Stoakes wrote:
> On Thu, Dec 19, 2024 at 01:17:44PM -0800, Chen, Zide wrote:
>
>> With this patch, it seems perf tool has some problems in capturing the
>> kernel data with Intel PT.
>>
>> Running the following commands, the size of perf.data is very small, and
>> perf script can't find any valid records.
>>
>> perf record -e intel_pt//u -- /bin/ls
>> perf script --insn-trace
>>
>>
>
> Hi,
>
> I'm on leave (and should really go back to relaxing :>), returning on 2nd
> Jan so can't really dig into this.
>
> But I tried it on my intel box and it 'works on my machine' with and
> without patch with commands provided, so I'm not sure this is actually a
> product of this change (which shouldn't impact this).
Zide Chen, can you try with and without this patch to see if it
introduces the issue?
--
Cheers,
David / dhildenb
next prev parent reply other threads:[~2024-12-20 9:57 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-12-05 8:29 Lorenzo Stoakes
2024-12-19 21:17 ` Chen, Zide
2024-12-20 9:31 ` Lorenzo Stoakes
2024-12-20 9:56 ` David Hildenbrand [this message]
2024-12-20 19:36 ` Chen, Zide
2024-12-20 21:29 ` David Hildenbrand
2024-12-20 21:53 ` David Hildenbrand
2024-12-23 11:10 ` Lorenzo Stoakes
2024-12-23 21:12 ` David Hildenbrand
2025-01-03 14:45 ` Lorenzo Stoakes
2025-01-03 20:36 ` Chen, Zide
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