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Fri, 16 Aug 2024 08:17:35 -0700 From: Krishna chaitanya chundru Date: Fri, 16 Aug 2024 20:47:21 +0530 Subject: [PATCH v2 2/4] Documentation: dwc_pcie_pmu: Update bdf to sbdf MIME-Version: 1.0 Message-ID: <20240816-dwc_pmu_fix-v2-2-198b8ab1077c@quicinc.com> References: <20240816-dwc_pmu_fix-v2-0-198b8ab1077c@quicinc.com> In-Reply-To: <20240816-dwc_pmu_fix-v2-0-198b8ab1077c@quicinc.com> To: Shuai Xue , Jing Zhang , Will Deacon , Mark Rutland , Baolin Wang , "Yicong Yang" , Jonathan Cameron , Jonathan Corbet CC: , , , , , , , , , , "Krishna chaitanya chundru" X-Mailer: b4 0.14.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1723821442; l=2920; i=quic_krichai@quicinc.com; s=20230907; h=from:subject:message-id; bh=LK8+aoB8ucdCz8X8Jmwhml5sbBUA488l8iN1Nqf4BpY=; b=chO35ka73LBwU99UNmGoeRTMf2tDSfa8fcBGitY+QPuxGHzcDbLDZp+qAql4BDPJGqKMNO7Ib CLQx4RattmmBMe9f+uGrCDJxiKgYqfZodQ0eJ+foKsy5TZ8d00/gb// X-Developer-Key: i=quic_krichai@quicinc.com; a=ed25519; pk=10CL2pdAKFyzyOHbfSWHCD0X0my7CXxj8gJScmn1FAg= X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) X-QCInternal: smtphost X-Proofpoint-Virus-Version: vendor=nai engine=6200 definitions=5800 signatures=585085 X-Proofpoint-GUID: V5tpsevPp1WpdK8dJeOQ0lmMwkf1Q5rn X-Proofpoint-ORIG-GUID: V5tpsevPp1WpdK8dJeOQ0lmMwkf1Q5rn X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.28.16 definitions=2024-08-16_09,2024-08-16_01,2024-05-17_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 suspectscore=0 impostorscore=0 malwarescore=0 mlxscore=0 lowpriorityscore=0 spamscore=0 mlxlogscore=915 bulkscore=0 adultscore=0 priorityscore=1501 clxscore=1015 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2407110000 definitions=main-2408160110 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240816_161811_690100_0525D9E6 X-CRM114-Status: GOOD ( 14.73 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Update document to reflect the driver change to use sbdf instead of bdf alone. Signed-off-by: Krishna chaitanya chundru Reviewed-by: Yicong Yang --- Documentation/admin-guide/perf/dwc_pcie_pmu.rst | 16 ++++++++-------- 1 file changed, 8 insertions(+), 8 deletions(-) diff --git a/Documentation/admin-guide/perf/dwc_pcie_pmu.rst b/Documentation/admin-guide/perf/dwc_pcie_pmu.rst index d47cd229d710..39b8e1fdd0cd 100644 --- a/Documentation/admin-guide/perf/dwc_pcie_pmu.rst +++ b/Documentation/admin-guide/perf/dwc_pcie_pmu.rst @@ -46,16 +46,16 @@ Some of the events only exist for specific configurations. DesignWare Cores (DWC) PCIe PMU Driver ======================================= -This driver adds PMU devices for each PCIe Root Port named based on the BDF of +This driver adds PMU devices for each PCIe Root Port named based on the SBDF of the Root Port. For example, - 30:03.0 PCI bridge: Device 1ded:8000 (rev 01) + 0001:30:03.0 PCI bridge: Device 1ded:8000 (rev 01) -the PMU device name for this Root Port is dwc_rootport_3018. +the PMU device name for this Root Port is dwc_rootport_13018. The DWC PCIe PMU driver registers a perf PMU driver, which provides description of available events and configuration options in sysfs, see -/sys/bus/event_source/devices/dwc_rootport_{bdf}. +/sys/bus/event_source/devices/dwc_rootport_{sbdf}. The "format" directory describes format of the config fields of the perf_event_attr structure. The "events" directory provides configuration @@ -66,16 +66,16 @@ The "perf list" command shall list the available events from sysfs, e.g.:: $# perf list | grep dwc_rootport <...> - dwc_rootport_3018/Rx_PCIe_TLP_Data_Payload/ [Kernel PMU event] + dwc_rootport_13018/Rx_PCIe_TLP_Data_Payload/ [Kernel PMU event] <...> - dwc_rootport_3018/rx_memory_read,lane=?/ [Kernel PMU event] + dwc_rootport_13018/rx_memory_read,lane=?/ [Kernel PMU event] Time Based Analysis Event Usage ------------------------------- Example usage of counting PCIe RX TLP data payload (Units of bytes):: - $# perf stat -a -e dwc_rootport_3018/Rx_PCIe_TLP_Data_Payload/ + $# perf stat -a -e dwc_rootport_13018/Rx_PCIe_TLP_Data_Payload/ The average RX/TX bandwidth can be calculated using the following formula: @@ -88,7 +88,7 @@ Lane Event Usage Each lane has the same event set and to avoid generating a list of hundreds of events, the user need to specify the lane ID explicitly, e.g.:: - $# perf stat -a -e dwc_rootport_3018/rx_memory_read,lane=4/ + $# perf stat -a -e dwc_rootport_13018/rx_memory_read,lane=4/ The driver does not support sampling, therefore "perf record" will not work. Per-task (without "-a") perf sessions are not supported.