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Thu, 18 Sep 2025 06:29:22 +0000 (GMT) Content-Type: text/plain; charset=utf-8 X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Owner: List-Post: List-Archive: , List-Subscribe: , , List-Unsubscribe: Precedence: list Mime-Version: 1.0 (Mac OS X Mail 16.0 \(3776.700.51\)) Subject: Re: [PATCH V3 0/6] perf/tools: Add interface to expose vpa dtl From: Athira Rajeev In-Reply-To: Date: Thu, 18 Sep 2025 11:59:09 +0530 Cc: Arnaldo Carvalho de Melo , Jiri Olsa , Madhavan Srinivasan , Ian Rogers , Namhyung Kim , "open list:PERFORMANCE EVENTS SUBSYSTEM" , linuxppc-dev , Aboorva Devarajan , Shrikanth Hegde , hbathini@linux.vnet.ibm.com, Aditya Bodkhe , Venkat Rao Bagalkote , Tejas Manhas Content-Transfer-Encoding: quoted-printable Message-Id: <4C841772-9590-468B-A5E5-B67495E4E2D6@linux.ibm.com> References: <20250916052536.93911-1-atrajeev@linux.ibm.com> To: Adrian Hunter X-Mailer: Apple Mail (2.3776.700.51) X-TM-AS-GCONF: 00 X-Authority-Analysis: v=2.4 cv=Qf5mvtbv c=1 sm=1 tr=0 ts=68cba6ce cx=c_pps a=bLidbwmWQ0KltjZqbj+ezA==:117 a=bLidbwmWQ0KltjZqbj+ezA==:17 a=IkcTkHD0fZMA:10 a=yJojWOMRYYMA:10 a=QyXUC8HyAAAA:8 a=9a-m9Z7WuIiSYxGGx3EA:9 a=QEXdDO2ut3YA:10 X-Proofpoint-ORIG-GUID: a8xR3r_Z3WgahvjBivveNOadbQTtISoA X-Proofpoint-GUID: HhY_rwAW0RbEwN4OPnHN74p6hz9OyP4b X-Proofpoint-Spam-Details-Enc: AW1haW4tMjUwOTE2MDIwNCBTYWx0ZWRfX2Dk9pNkGn0H6 hXshTUuOAJxtLc6PfHxh3CetvBvTgIQpAbzRXLbEWkniZ61d8voUOt28FyThkt0bUEOUOO1Bbtd 6YxUC8TMPE0V0SWLIQ4OcVpFQP/p9NqWxn2PtExXuph0lYvVcAdV1xf0X1r4QlTQQYujkuoOE0R iTnCA7BH2J7v/jH3oVfRJzoDQ4FLL2KmpDFGYsOB41nkjy4B9vQvJpFzMJ19qs+P5Ef7HBzgMp+ r/kDwwLz5WmeV6z55IbumcmNcbo1XUjxZF3YzZd9TzZVBMr6XHcbCQ3hSGabUfuVj6s18XpSXxZ Znm6IxvDNbZJgNyTX/WpXvR6TorauFsFHDgzOz4uN4JpC6Q5NzTKIo3AHzvNOjOh2+BblvtysyM H6ujsv6g X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1117,Hydra:6.1.9,FMLib:17.12.80.40 definitions=2025-09-17_01,2025-09-18_01,2025-03-28_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 clxscore=1015 phishscore=0 suspectscore=0 adultscore=0 priorityscore=1501 malwarescore=0 bulkscore=0 impostorscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.19.0-2507300000 definitions=main-2509160204 > On 17 Sep 2025, at 11:28=E2=80=AFAM, Adrian Hunter = wrote: >=20 > On 16/09/2025 08:25, Athira Rajeev wrote: >> The pseries Shared Processor Logical Partition(SPLPAR) machines can >> retrieve a log of dispatch and preempt events from the hypervisor >> using data from Disptach Trace Log(DTL) buffer. With this = information, >> user can retrieve when and why each dispatch & preempt has occurred. >> The vpa-dtl PMU exposes the Virtual Processor Area(VPA) DTL counters >> via perf. >>=20 >> - Patch 1 to 6 is perf tools side code changes to enable perf >> report/script on perf.data file >=20 > For all patches 1 to 6: >=20 > Reviewed-by: Adrian Hunter Thanks Adrian for sharing Reviewed-by=20 Athira >=20