| Quellcodebibliothek Statistik Leitseite products/Sources/formale Sprachen/C/Linux/tools/lib/perf/include/perf/ (Linux Kernel Version 6.17.9©) Datei vom 24.10.2025 mit Größe 1 kB |
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Quelle bpf_perf.h Sprache: C |
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/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */ #ifndef __LIBPERF_BPF_PERF_H #define __LIBPERF_BPF_PERF_H #include <linux/types.h> /* for __u32 */ /* * bpf_perf uses a hashmap, the attr_map, to track all the leader programs. * The hashmap is pinned in bpffs. flock() on this file is used to ensure * no concurrent access to the attr_map. The key of attr_map is struct * perf_event_attr, and the value is struct perf_event_attr_map_entry. * * struct perf_event_attr_map_entry contains two __u32 IDs, bpf_link of the * leader prog, and the diff_map. Each perf-stat session holds a reference * to the bpf_link to make sure the leader prog is attached to sched_switch * tracepoint. * * Since the hashmap only contains IDs of the bpf_link and diff_map, it * does not hold any references to the leader program. Once all perf-stat * sessions of these events exit, the leader prog, its maps, and the * perf_events will be freed. */ struct perf_event_attr_map_entry { __u32 link_id; __u32 diff_map_id; }; /* default attr_map name */ #define BPF_PERF_DEFAULT_ATTR_MAP_PATH "perf_attr_map" #endif /* __LIBPERF_BPF_PERF_H */
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2026-10-10