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[2003:cb:c708:9d00:edd9:835b:4bfb:2ce3]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-38a1c8ace0esm3569887f8f.106.2024.12.20.01.56.51 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 20 Dec 2024 01:56:52 -0800 (PST) Message-ID: <860a1ef0-678d-414d-8511-9695b90c3ca0@redhat.com> Date: Fri, 20 Dec 2024 10:56:50 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3] perf: map pages in advance To: Lorenzo Stoakes , "Chen, Zide" Cc: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Namhyung Kim , Mark Rutland , Alexander Shishkin , Jiri Olsa , Ian Rogers , Adrian Hunter , Kan Liang , linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, Matthew Wilcox , Yi Lai References: <20241205082948.56212-1-lorenzo.stoakes@oracle.com> <65a04f0d-668b-47b6-a532-d1e11ef4835a@intel.com> <4ded2d63-03dd-498e-9810-690a9eff0c22@lucifer.local> From: David Hildenbrand Autocrypt: addr=david@redhat.com; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZgEEwEIAEICGwMGCwkIBwMCBhUIAgkKCwQW AgMBAh4BAheAAhkBFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAl8Ox4kFCRKpKXgACgkQTd4Q 9wD/g1oHcA//a6Tj7SBNjFNM1iNhWUo1lxAja0lpSodSnB2g4FCZ4R61SBR4l/psBL73xktp rDHrx4aSpwkRP6Epu6mLvhlfjmkRG4OynJ5HG1gfv7RJJfnUdUM1z5kdS8JBrOhMJS2c/gPf wv1TGRq2XdMPnfY2o0CxRqpcLkx4vBODvJGl2mQyJF/gPepdDfcT8/PY9BJ7FL6Hrq1gnAo4 3Iv9qV0JiT2wmZciNyYQhmA1V6dyTRiQ4YAc31zOo2IM+xisPzeSHgw3ONY/XhYvfZ9r7W1l pNQdc2G+o4Di9NPFHQQhDw3YTRR1opJaTlRDzxYxzU6ZnUUBghxt9cwUWTpfCktkMZiPSDGd KgQBjnweV2jw9UOTxjb4LXqDjmSNkjDdQUOU69jGMUXgihvo4zhYcMX8F5gWdRtMR7DzW/YE BgVcyxNkMIXoY1aYj6npHYiNQesQlqjU6azjbH70/SXKM5tNRplgW8TNprMDuntdvV9wNkFs 9TyM02V5aWxFfI42+aivc4KEw69SE9KXwC7FSf5wXzuTot97N9Phj/Z3+jx443jo2NR34XgF 89cct7wJMjOF7bBefo0fPPZQuIma0Zym71cP61OP/i11ahNye6HGKfxGCOcs5wW9kRQEk8P9 M/k2wt3mt/fCQnuP/mWutNPt95w9wSsUyATLmtNrwccz63XOwU0EVcufkQEQAOfX3n0g0fZz Bgm/S2zF/kxQKCEKP8ID+Vz8sy2GpDvveBq4H2Y34XWsT1zLJdvqPI4af4ZSMxuerWjXbVWb T6d4odQIG0fKx4F8NccDqbgHeZRNajXeeJ3R7gAzvWvQNLz4piHrO/B4tf8svmRBL0ZB5P5A 2uhdwLU3NZuK22zpNn4is87BPWF8HhY0L5fafgDMOqnf4guJVJPYNPhUFzXUbPqOKOkL8ojk CXxkOFHAbjstSK5Ca3fKquY3rdX3DNo+EL7FvAiw1mUtS+5GeYE+RMnDCsVFm/C7kY8c2d0G NWkB9pJM5+mnIoFNxy7YBcldYATVeOHoY4LyaUWNnAvFYWp08dHWfZo9WCiJMuTfgtH9tc75 7QanMVdPt6fDK8UUXIBLQ2TWr/sQKE9xtFuEmoQGlE1l6bGaDnnMLcYu+Asp3kDT0w4zYGsx 5r6XQVRH4+5N6eHZiaeYtFOujp5n+pjBaQK7wUUjDilPQ5QMzIuCL4YjVoylWiBNknvQWBXS lQCWmavOT9sttGQXdPCC5ynI+1ymZC1ORZKANLnRAb0NH/UCzcsstw2TAkFnMEbo9Zu9w7Kv AxBQXWeXhJI9XQssfrf4Gusdqx8nPEpfOqCtbbwJMATbHyqLt7/oz/5deGuwxgb65pWIzufa N7eop7uh+6bezi+rugUI+w6DABEBAAHCwXwEGAEIACYCGwwWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCXw7HsgUJEqkpoQAKCRBN3hD3AP+DWrrpD/4qS3dyVRxDcDHIlmguXjC1Q5tZTwNB boaBTPHSy/Nksu0eY7x6HfQJ3xajVH32Ms6t1trDQmPx2iP5+7iDsb7OKAb5eOS8h+BEBDeq 3ecsQDv0fFJOA9ag5O3LLNk+3x3q7e0uo06XMaY7UHS341ozXUUI7wC7iKfoUTv03iO9El5f XpNMx/YrIMduZ2+nd9Di7o5+KIwlb2mAB9sTNHdMrXesX8eBL6T9b+MZJk+mZuPxKNVfEQMQ a5SxUEADIPQTPNvBewdeI80yeOCrN+Zzwy/Mrx9EPeu59Y5vSJOx/z6OUImD/GhX7Xvkt3kq Er5KTrJz3++B6SH9pum9PuoE/k+nntJkNMmQpR4MCBaV/J9gIOPGodDKnjdng+mXliF3Ptu6 3oxc2RCyGzTlxyMwuc2U5Q7KtUNTdDe8T0uE+9b8BLMVQDDfJjqY0VVqSUwImzTDLX9S4g/8 kC4HRcclk8hpyhY2jKGluZO0awwTIMgVEzmTyBphDg/Gx7dZU1Xf8HFuE+UZ5UDHDTnwgv7E th6RC9+WrhDNspZ9fJjKWRbveQgUFCpe1sa77LAw+XFrKmBHXp9ZVIe90RMe2tRL06BGiRZr jPrnvUsUUsjRoRNJjKKA/REq+sAnhkNPPZ/NNMjaZ5b8Tovi8C0tmxiCHaQYqj7G2rgnT0kt WNyWQQ== Organization: Red Hat In-Reply-To: <4ded2d63-03dd-498e-9810-690a9eff0c22@lucifer.local> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: TyehBfnwkVE4_3SgQc4c20zEvP5OC5YD6Zm7VwPyVa4_1734688613 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Stat-Signature: fxir74zws8ikgt1n3qse9t3jzi5srh98 X-Rspam-User: X-Rspamd-Queue-Id: E885520003 X-Rspamd-Server: rspam08 X-HE-Tag: 1734688602-54029 X-HE-Meta: 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 9BGK2nf0 z4fD1phUMdBUqkVMAaI2OgjOMKC1uMF07+18T5YWLSdUh3lTe2GqMC0bDrigjCBGDOU/Jj4y1Pwcg7CqWVIP1h3Ic0nFjdrop4YdCUok8mTmlRU3iKtUbcNNwBiU+GBrA9B2RktBz1Q7MhdkRT/A1M5kM+xVSg49rj20qn1I0jRfKsqc/Aln7enoe/dewWKxZHgFZdRoLLiPZ+I+mlR27cpMuCf42Ra3oI+PxUoVAbMLgvEUecVdYN8b9FHImR+qxO84n1bZ3CotwCM93nnkS4HRAt5sLHh+r+g4A/gS18JwedZ9OVCg3QgmbyVA+9MeMBSKkgKbdXVa42IVxpThZ8LxIHbsvSTV7KyWl5IMCvAOGE/Q2xpk1rCEozQnWejhMJDR7RPsWxeP3hpk= X-Bogosity: Ham, tests=bogofilter, spamicity=0.158742, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: 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