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![Ian Rogers](/assets/img/avatar_default.png)
A typical "cpu" PMU has no "cpus" or "cpumask" file meaning the CPU map is set to NULL, which also encodes an empty CPU map. Update pmu_cpumask so that if the "cpu" PMU fails to load a CPU map, use a default of all online PMUs. Remove const from cpu_map__online for the sake of reference counting. Reviewed-by: Kan Liang <kan.liang@linux.intel.com> Signed-off-by: Ian Rogers <irogers@google.com> Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Ali Saidi <alisaidi@amazon.com> Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com> Cc: Dmitrii Dolgov <9erthalion6@gmail.com> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: James Clark <james.clark@arm.com> Cc: Jing Zhang <renyu.zj@linux.alibaba.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: John Garry <john.g.garry@oracle.com> Cc: Kajol Jain <kjain@linux.ibm.com> Cc: Kang Minchul <tegongkang@gmail.com> Cc: Leo Yan <leo.yan@linaro.org> Cc: Madhavan Srinivasan <maddy@linux.ibm.com> Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mike Leach <mike.leach@linaro.org> Cc: Ming Wang <wangming01@loongson.cn> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Ravi Bangoria <ravi.bangoria@amd.com> Cc: Rob Herring <robh@kernel.org> Cc: Sandipan Das <sandipan.das@amd.com> Cc: Sean Christopherson <seanjc@google.com> Cc: Suzuki Poulouse <suzuki.poulose@arm.com> Cc: Thomas Richter <tmricht@linux.ibm.com> Cc: Will Deacon <will@kernel.org> Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com> Cc: coresight@lists.linaro.org Cc: linux-arm-kernel@lists.infradead.org Link: https://lore.kernel.org/r/20230527072210.2900565-8-irogers@google.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
151 lines
5.3 KiB
C
151 lines
5.3 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PERF_CPUMAP_H
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#define __PERF_CPUMAP_H
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#include <stdbool.h>
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#include <stdio.h>
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#include <perf/cpumap.h>
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#include <linux/refcount.h>
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/** Identify where counts are aggregated, -1 implies not to aggregate. */
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struct aggr_cpu_id {
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/** A value in the range 0 to number of threads. */
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int thread_idx;
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/** The numa node X as read from /sys/devices/system/node/nodeX. */
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int node;
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/**
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* The socket number as read from
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* /sys/devices/system/cpu/cpuX/topology/physical_package_id.
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*/
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int socket;
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/** The die id as read from /sys/devices/system/cpu/cpuX/topology/die_id. */
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int die;
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/** The cache level as read from /sys/devices/system/cpu/cpuX/cache/indexY/level */
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int cache_lvl;
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/**
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* The cache instance ID, which is the first CPU in the
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* /sys/devices/system/cpu/cpuX/cache/indexY/shared_cpu_list
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*/
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int cache;
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/** The core id as read from /sys/devices/system/cpu/cpuX/topology/core_id. */
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int core;
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/** CPU aggregation, note there is one CPU for each SMT thread. */
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struct perf_cpu cpu;
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};
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/** A collection of aggr_cpu_id values, the "built" version is sorted and uniqued. */
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struct cpu_aggr_map {
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refcount_t refcnt;
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/** Number of valid entries. */
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int nr;
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/** The entries. */
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struct aggr_cpu_id map[];
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};
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#define cpu_aggr_map__for_each_idx(idx, aggr_map) \
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for ((idx) = 0; (idx) < aggr_map->nr; (idx)++)
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struct perf_record_cpu_map_data;
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bool perf_record_cpu_map_data__test_bit(int i, const struct perf_record_cpu_map_data *data);
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struct perf_cpu_map *perf_cpu_map__empty_new(int nr);
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struct perf_cpu_map *cpu_map__new_data(const struct perf_record_cpu_map_data *data);
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size_t cpu_map__snprint(struct perf_cpu_map *map, char *buf, size_t size);
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size_t cpu_map__snprint_mask(struct perf_cpu_map *map, char *buf, size_t size);
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size_t cpu_map__fprintf(struct perf_cpu_map *map, FILE *fp);
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struct perf_cpu_map *cpu_map__online(void); /* thread unsafe */
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int cpu__setup_cpunode_map(void);
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int cpu__max_node(void);
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struct perf_cpu cpu__max_cpu(void);
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struct perf_cpu cpu__max_present_cpu(void);
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/**
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* cpu_map__is_dummy - Events associated with a pid, rather than a CPU, use a single dummy map with an entry of -1.
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*/
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static inline bool cpu_map__is_dummy(const struct perf_cpu_map *cpus)
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{
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return perf_cpu_map__nr(cpus) == 1 && perf_cpu_map__cpu(cpus, 0).cpu == -1;
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}
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/**
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* cpu__get_node - Returns the numa node X as read from
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* /sys/devices/system/node/nodeX for the given CPU.
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*/
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int cpu__get_node(struct perf_cpu cpu);
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/**
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* cpu__get_socket_id - Returns the socket number as read from
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* /sys/devices/system/cpu/cpuX/topology/physical_package_id for the given CPU.
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*/
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int cpu__get_socket_id(struct perf_cpu cpu);
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/**
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* cpu__get_die_id - Returns the die id as read from
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* /sys/devices/system/cpu/cpuX/topology/die_id for the given CPU.
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*/
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int cpu__get_die_id(struct perf_cpu cpu);
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/**
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* cpu__get_core_id - Returns the core id as read from
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* /sys/devices/system/cpu/cpuX/topology/core_id for the given CPU.
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*/
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int cpu__get_core_id(struct perf_cpu cpu);
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/**
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* cpu_aggr_map__empty_new - Create a cpu_aggr_map of size nr with every entry
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* being empty.
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*/
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struct cpu_aggr_map *cpu_aggr_map__empty_new(int nr);
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typedef struct aggr_cpu_id (*aggr_cpu_id_get_t)(struct perf_cpu cpu, void *data);
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/**
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* cpu_aggr_map__new - Create a cpu_aggr_map with an aggr_cpu_id for each cpu in
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* cpus. The aggr_cpu_id is created with 'get_id' that may have a data value
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* passed to it. The cpu_aggr_map is sorted with duplicate values removed.
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*/
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struct cpu_aggr_map *cpu_aggr_map__new(const struct perf_cpu_map *cpus,
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aggr_cpu_id_get_t get_id,
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void *data, bool needs_sort);
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bool aggr_cpu_id__equal(const struct aggr_cpu_id *a, const struct aggr_cpu_id *b);
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bool aggr_cpu_id__is_empty(const struct aggr_cpu_id *a);
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struct aggr_cpu_id aggr_cpu_id__empty(void);
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/**
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* aggr_cpu_id__socket - Create an aggr_cpu_id with the socket populated with
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* the socket for cpu. The function signature is compatible with
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* aggr_cpu_id_get_t.
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*/
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struct aggr_cpu_id aggr_cpu_id__socket(struct perf_cpu cpu, void *data);
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/**
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* aggr_cpu_id__die - Create an aggr_cpu_id with the die and socket populated
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* with the die and socket for cpu. The function signature is compatible with
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* aggr_cpu_id_get_t.
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*/
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struct aggr_cpu_id aggr_cpu_id__die(struct perf_cpu cpu, void *data);
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/**
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* aggr_cpu_id__core - Create an aggr_cpu_id with the core, die and socket
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* populated with the core, die and socket for cpu. The function signature is
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* compatible with aggr_cpu_id_get_t.
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*/
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struct aggr_cpu_id aggr_cpu_id__core(struct perf_cpu cpu, void *data);
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/**
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* aggr_cpu_id__core - Create an aggr_cpu_id with the cpu, core, die and socket
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* populated with the cpu, core, die and socket for cpu. The function signature
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* is compatible with aggr_cpu_id_get_t.
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*/
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struct aggr_cpu_id aggr_cpu_id__cpu(struct perf_cpu cpu, void *data);
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/**
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* aggr_cpu_id__node - Create an aggr_cpu_id with the numa node populated for
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* cpu. The function signature is compatible with aggr_cpu_id_get_t.
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*/
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struct aggr_cpu_id aggr_cpu_id__node(struct perf_cpu cpu, void *data);
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/**
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* aggr_cpu_id__global - Create an aggr_cpu_id for global aggregation.
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* The function signature is compatible with aggr_cpu_id_get_t.
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*/
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struct aggr_cpu_id aggr_cpu_id__global(struct perf_cpu cpu, void *data);
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#endif /* __PERF_CPUMAP_H */
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