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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: logwr2nlVnf+w1E7PWwgbClGOfTm8RBj/O154LRnfTV0dW7ZCjQyjkbXWpFixvXtMQBncNLUKKDgt9aeYWGMFLY5jSxPI3i9Xc91U6mL+IZ/tnmYscf1zGOrEt4IOvafWScTjVCIQfDEav5Jn2unNRfkDffCChqqYR0avfp5M39TThQBxQwp7/H/fHkzufPuiK7ZAZpXNVCzQ3fqrjL5z34nIpwKEwG8xyRA2aAwo3GIpTeXW0RESlRrv3mZne2QJPZOYZ4YVrHYLDDljZoptVOOajGrwDjAzr7Q/jEmyyOUl+2lpFq309NCliAUAvBaieKB1K/gGvv6BBlJ+UMdYoaDYwMmJP+yBO42jaT/cJXM15sYYl5/c2FLRtClJGIrBf1oBIjHFJ0r3ZjBSQMV/uCGGYPXtkoijY1GFQGl3vMOwjfU4LBTCYMD5CH88MxV X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 27 Oct 2026 09:15:01.4469 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 8a5e881e-7192-4ff1-9b62-08df340ac7ba X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[satlexmb07.amd.com] X-MS-Exchange-CrossTenant-AuthSource: PH3PEPF0005961B.namprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH8PR12MB999296 > We use the following command to track a process's memory footprint: > #perf record -e ibs_fetch// -e ibs_op// -p xxx --phys-addr -- sleep 10 > > In the mysql tests, I catched over 1,804,973 records for ibs_op event. > I found that over 53% records(970,554) are like this: > ibs_op//: ffffffffb6017739 0 > > The physical address is 0 for these records. These records are not needed > by us, and they wasted the CPU cycles. > > This patch adds an ibs_op/phy_addr_only term that discards samples > without a valid physical address (dc_phy_addr_valid == 0) in the interrupt > handler. And it avoids the phys_addr=0 noise when used with --phys-data. Why not simply use the BPF filter? $ perf record -e ibs_op// --phys-data --filter 'phys_addr != 0' ... Thanks, Ravi