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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Jul 2024 09:27:02.4673 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: b7b63bec-93b5-4762-95fa-08dca7d4f2a5 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=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SA2PEPF00003AE8.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB6713 After commit ("x86/cpu/topology: Add support for the AMD 0x80000026 leaf"), on AMD processors that support extended CPUID leaf 0x80000026, the topology_die_cpumask() and topology_logical_die_id() macros, no longer return the package cpumask and package id, instead they return the CCD (Core Complex Die) mask and id respectively. This leads to the energy-pkg event scope to be modified to CCD instead of package. For more historical context, please refer to commit 32fb480e0a2c ("powercap/intel_rapl: Support multi-die/package"), which initially changed the RAPL scope from package to die for all systems, as Intel systems with Die enumeration have RAPL scope as die, and those without die enumeration were not affected by it. So, all systems(Intel, AMD, Hygon), worked correctly with topology_logical_die_id() until recently, but this changed after the "0x80000026 leaf" commit mentioned above. Replacing topology_logical_die_id() with topology_physical_package_id() conditionally only for AMD and Hygon fixes the energy-pkg event. On a 12 CCD 1 Package AMD Zen4 Genoa machine: Before: $ cat /sys/devices/power/cpumask 0,8,16,24,32,40,48,56,64,72,80,88. The expected cpumask here is supposed to be just "0", as it is a package scope event, only one CPU will be collecting the event for all the CPUs in the package. After: $ cat /sys/devices/power/cpumask 0 Fixes: 63edbaa48a57 ("x86/cpu/topology: Add support for the AMD 0x80000026 leaf") Signed-off-by: Dhananjay Ugwekar Reviewed-by: Zhang Rui --- arch/x86/events/rapl.c | 44 +++++++++++++++++++++++++++++++++++++----- 1 file changed, 39 insertions(+), 5 deletions(-) diff --git a/arch/x86/events/rapl.c b/arch/x86/events/rapl.c index b985ca79cf97..6e81bb685f7c 100644 --- a/arch/x86/events/rapl.c +++ b/arch/x86/events/rapl.c @@ -103,6 +103,18 @@ static struct perf_pmu_events_attr event_attr_##v = { \ .event_str = str, \ }; +/* + * Intel systems that enumerate DIE domain have RAPL domains implemented + * per-die, however, the same is not true for AMD and Hygon processors + * where RAPL domains for PKG energy are in-fact per-PKG. Since + * logical_die_id is same as logical_package_id in absence of DIE + * enumeration, use topology_logical_die_id() on Intel systems and + * topology_logical_package_id() on AMD and Hygon systems. + */ +#define rapl_pmu_is_pkg_scope() \ + (boot_cpu_data.x86_vendor == X86_VENDOR_AMD || \ + boot_cpu_data.x86_vendor == X86_VENDOR_HYGON) + struct rapl_pmu { raw_spinlock_t lock; int n_active; @@ -140,9 +152,25 @@ static unsigned int rapl_cntr_mask; static u64 rapl_timer_ms; static struct perf_msr *rapl_msrs; +/* + * Helper functions to get the correct topology macros according to the + * RAPL PMU scope. + */ +static inline unsigned int get_rapl_pmu_idx(int cpu) +{ + return rapl_pmu_is_pkg_scope() ? topology_logical_package_id(cpu) : + topology_logical_die_id(cpu); +} + +static inline const struct cpumask *get_rapl_pmu_cpumask(int cpu) +{ + return rapl_pmu_is_pkg_scope() ? topology_core_cpumask(cpu) : + topology_die_cpumask(cpu); +} + static inline struct rapl_pmu *cpu_to_rapl_pmu(unsigned int cpu) { - unsigned int rapl_pmu_idx = topology_logical_die_id(cpu); + unsigned int rapl_pmu_idx = get_rapl_pmu_idx(cpu); /* * The unsigned check also catches the '-1' return value for non @@ -543,6 +571,7 @@ static struct perf_msr amd_rapl_msrs[] = { static int rapl_cpu_offline(unsigned int cpu) { + const struct cpumask *rapl_pmu_cpumask = get_rapl_pmu_cpumask(cpu); struct rapl_pmu *pmu = cpu_to_rapl_pmu(cpu); int target; @@ -552,7 +581,7 @@ static int rapl_cpu_offline(unsigned int cpu) pmu->cpu = -1; /* Find a new cpu to collect rapl events */ - target = cpumask_any_but(topology_die_cpumask(cpu), cpu); + target = cpumask_any_but(rapl_pmu_cpumask, cpu); /* Migrate rapl events to the new target */ if (target < nr_cpu_ids) { @@ -565,10 +594,12 @@ static int rapl_cpu_offline(unsigned int cpu) static int rapl_cpu_online(unsigned int cpu) { + const struct cpumask *rapl_pmu_cpumask = get_rapl_pmu_cpumask(cpu); struct rapl_pmu *pmu = cpu_to_rapl_pmu(cpu); int target; if (!pmu) { + unsigned int rapl_pmu_idx = get_rapl_pmu_idx(cpu); pmu = kzalloc_node(sizeof(*pmu), GFP_KERNEL, cpu_to_node(cpu)); if (!pmu) return -ENOMEM; @@ -579,14 +610,14 @@ static int rapl_cpu_online(unsigned int cpu) pmu->timer_interval = ms_to_ktime(rapl_timer_ms); rapl_hrtimer_init(pmu); - rapl_pmus->pmus[topology_logical_die_id(cpu)] = pmu; + rapl_pmus->pmus[rapl_pmu_idx] = pmu; } /* * Check if there is an online cpu in the package which collects rapl * events already. */ - target = cpumask_any_and(&rapl_cpu_mask, topology_die_cpumask(cpu)); + target = cpumask_any_and(&rapl_cpu_mask, rapl_pmu_cpumask); if (target < nr_cpu_ids) return 0; @@ -675,7 +706,10 @@ static const struct attribute_group *rapl_attr_update[] = { static int __init init_rapl_pmus(void) { - int nr_rapl_pmu = topology_max_packages() * topology_max_dies_per_package(); + int nr_rapl_pmu = topology_max_packages(); + + if (!rapl_pmu_is_pkg_scope()) + nr_rapl_pmu *= topology_max_dies_per_package(); rapl_pmus = kzalloc(struct_size(rapl_pmus, pmus, nr_rapl_pmu), GFP_KERNEL); if (!rapl_pmus) From patchwork Fri Jul 19 09:25:46 2024 Content-Type: text/plain; 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X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 19 Jul 2024 09:27:52.8072 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 36bc9582-ce49-4d1f-73a6-08dca7d510a4 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=[SATLEXMB03.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SA2PEPF00003AE4.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB7842 After commit ("x86/cpu/topology: Add support for the AMD 0x80000026 leaf"), on AMD processors that support extended CPUID leaf 0x80000026, the topology_logical_die_id() macros, no longer returns package id, instead it returns the CCD (Core Complex Die) id. This leads to the energy-pkg event scope to be modified to CCD instead of package. For more historical context, please refer to commit 32fb480e0a2c ("powercap/intel_rapl: Support multi-die/package"), which initially changed the RAPL scope from package to die for all systems, as Intel systems with Die enumeration have RAPL scope as die, and those without die enumeration are not affected. So, all systems(Intel, AMD, Hygon), worked correctly with topology_logical_die_id() until recently, but this changed after the "0x80000026 leaf" commit mentioned above. Replacing topology_logical_die_id() with topology_physical_package_id() conditionally only for AMD and Hygon fixes the energy-pkg event. On an AMD 2 socket 8 CCD Zen5 server: Before: linux$ ls /sys/class/powercap/ intel-rapl intel-rapl:1:0 intel-rapl:3:0 intel-rapl:5:0 intel-rapl:7:0 intel-rapl:9:0 intel-rapl:b:0 intel-rapl:d:0 intel-rapl:f:0 intel-rapl:0 intel-rapl:2 intel-rapl:4 intel-rapl:6 intel-rapl:8 intel-rapl:a intel-rapl:c intel-rapl:e intel-rapl:0:0 intel-rapl:2:0 intel-rapl:4:0 intel-rapl:6:0 intel-rapl:8:0 intel-rapl:a:0 intel-rapl:c:0 intel-rapl:e:0 intel-rapl:1 intel-rapl:3 intel-rapl:5 intel-rapl:7 intel-rapl:9 intel-rapl:b intel-rapl:d intel-rapl:f After: linux$ ls /sys/class/powercap/ intel-rapl intel-rapl:0 intel-rapl:0:0 intel-rapl:1 intel-rapl:1:0 Only one sysfs entry per-event per-package is created after this change. Fixes: 63edbaa48a57 ("x86/cpu/topology: Add support for the AMD 0x80000026 leaf") Reported-by: Michael Larabel Signed-off-by: Dhananjay Ugwekar Reviewed-by: Zhang Rui --- drivers/powercap/intel_rapl_common.c | 20 +++++++++++++++++--- 1 file changed, 17 insertions(+), 3 deletions(-) diff --git a/drivers/powercap/intel_rapl_common.c b/drivers/powercap/intel_rapl_common.c index 3cffa6c79538..2f24ca764408 100644 --- a/drivers/powercap/intel_rapl_common.c +++ b/drivers/powercap/intel_rapl_common.c @@ -2128,6 +2128,18 @@ void rapl_remove_package(struct rapl_package *rp) } EXPORT_SYMBOL_GPL(rapl_remove_package); +/* + * Intel systems that enumerate DIE domain have RAPL domains implemented + * per-die, however, the same is not true for AMD and Hygon processors + * where RAPL domains for PKG energy are in-fact per-PKG. Since + * logical_die_id is same as logical_package_id in absence of DIE + * enumeration, use topology_logical_die_id() on Intel systems and + * topology_logical_package_id() on AMD and Hygon systems. + */ +#define rapl_pmu_is_pkg_scope() \ + (boot_cpu_data.x86_vendor == X86_VENDOR_AMD || \ + boot_cpu_data.x86_vendor == X86_VENDOR_HYGON) + /* caller to ensure CPU hotplug lock is held */ struct rapl_package *rapl_find_package_domain_cpuslocked(int id, struct rapl_if_priv *priv, bool id_is_cpu) @@ -2136,7 +2148,8 @@ struct rapl_package *rapl_find_package_domain_cpuslocked(int id, struct rapl_if_ int uid; if (id_is_cpu) - uid = topology_logical_die_id(id); + uid = rapl_pmu_is_pkg_scope() ? + topology_physical_package_id(id) : topology_logical_die_id(id); else uid = id; @@ -2168,9 +2181,10 @@ struct rapl_package *rapl_add_package_cpuslocked(int id, struct rapl_if_priv *pr return ERR_PTR(-ENOMEM); if (id_is_cpu) { - rp->id = topology_logical_die_id(id); + rp->id = rapl_pmu_is_pkg_scope() ? + topology_physical_package_id(id) : topology_logical_die_id(id); rp->lead_cpu = id; - if (topology_max_dies_per_package() > 1) + if (!rapl_pmu_is_pkg_scope() && topology_max_dies_per_package() > 1) snprintf(rp->name, PACKAGE_DOMAIN_NAME_LENGTH, "package-%d-die-%d", topology_physical_package_id(id), topology_die_id(id)); else