linux-stable/tools/perf/util/cputopo.h
Ian Rogers 207f7df727 perf expr: Make the online topology accessible globally
Knowing the topology of online CPUs is useful for more than just expr
literals. Move to a global function that caches the value. An
additional upside is that this may also avoid computing the CPU
topology in some situations.

Signed-off-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Alexandre Torgue <alexandre.torgue@foss.st.com>
Cc: Andrii Nakryiko <andrii@kernel.org>
Cc: Athira Rajeev <atrajeev@linux.vnet.ibm.com>
Cc: Caleb Biggers <caleb.biggers@intel.com>
Cc: Eduard Zingerman <eddyz87@gmail.com>
Cc: Florian Fischer <florian.fischer@muhq.space>
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: Kan Liang <kan.liang@linux.intel.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Perry Taylor <perry.taylor@intel.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Ravi Bangoria <ravi.bangoria@amd.com>
Cc: Sandipan Das <sandipan.das@amd.com>
Cc: Sean Christopherson <seanjc@google.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Suzuki Poulouse <suzuki.poulose@arm.com>
Cc: Xing Zhengjun <zhengjun.xing@linux.intel.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-stm32@st-md-mailman.stormreply.com
Link: https://lore.kernel.org/r/20230219092848.639226-8-irogers@google.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2023-02-19 08:03:12 -03:00

78 lines
2.3 KiB
C

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __PERF_CPUTOPO_H
#define __PERF_CPUTOPO_H
#include <linux/types.h>
struct cpu_topology {
/* The number of unique package_cpus_lists below. */
u32 package_cpus_lists;
/* The number of unique die_cpu_lists below. */
u32 die_cpus_lists;
/* The number of unique core_cpu_lists below. */
u32 core_cpus_lists;
/*
* An array of strings where each string is unique and read from
* /sys/devices/system/cpu/cpuX/topology/package_cpus_list. From the ABI
* each of these is a human-readable list of CPUs sharing the same
* physical_package_id. The format is like 0-3, 8-11, 14,17.
*/
const char **package_cpus_list;
/*
* An array of string where each string is unique and from
* /sys/devices/system/cpu/cpuX/topology/die_cpus_list. From the ABI
* each of these is a human-readable list of CPUs within the same die.
* The format is like 0-3, 8-11, 14,17.
*/
const char **die_cpus_list;
/*
* An array of string where each string is unique and from
* /sys/devices/system/cpu/cpuX/topology/core_cpus_list. From the ABI
* each of these is a human-readable list of CPUs within the same
* core. The format is like 0-3, 8-11, 14,17.
*/
const char **core_cpus_list;
};
struct numa_topology_node {
char *cpus;
u32 node;
u64 mem_total;
u64 mem_free;
};
struct numa_topology {
u32 nr;
struct numa_topology_node nodes[];
};
struct hybrid_topology_node {
char *pmu_name;
char *cpus;
};
struct hybrid_topology {
u32 nr;
struct hybrid_topology_node nodes[];
};
/*
* The topology for online CPUs, lazily created.
*/
const struct cpu_topology *online_topology(void);
struct cpu_topology *cpu_topology__new(void);
void cpu_topology__delete(struct cpu_topology *tp);
/* Determine from the core list whether SMT was enabled. */
bool cpu_topology__smt_on(const struct cpu_topology *topology);
/* Are the sets of SMT siblings all enabled or all disabled in user_requested_cpus. */
bool cpu_topology__core_wide(const struct cpu_topology *topology,
const char *user_requested_cpu_list);
struct numa_topology *numa_topology__new(void);
void numa_topology__delete(struct numa_topology *tp);
struct hybrid_topology *hybrid_topology__new(void);
void hybrid_topology__delete(struct hybrid_topology *tp);
#endif /* __PERF_CPUTOPO_H */