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When injecting events from a guest perf.data file, the events will have separate sample ID numbers. These ID numbers can then be used to determine which machine an event belongs to. To facilitate that, add machine_pid and vcpu to id_index records. For backward compatibility, these are added at the end of the record, and the length of the record is used to determine if they are present or not. Note, this is needed because the events from a guest perf.data file contain the pid/tid of the process running at that time inside the VM not the pid/tid of the (QEMU) hypervisor thread. So a way is needed to relate guest events back to the guest machine and VCPU, and using sample ID numbers for that is relatively simple and convenient. Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Cc: Andi Kleen <ak@linux.intel.com> Cc: Ian Rogers <irogers@google.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: kvm@vger.kernel.org Link: https://lore.kernel.org/r/20220711093218.10967-11-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
126 lines
7.0 KiB
C
126 lines
7.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __PERF_SYNTHETIC_EVENTS_H
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#define __PERF_SYNTHETIC_EVENTS_H
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#include <stdbool.h>
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#include <sys/types.h> // pid_t
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#include <linux/compiler.h>
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#include <linux/types.h>
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#include <perf/cpumap.h>
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struct auxtrace_record;
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struct dso;
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struct evlist;
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struct evsel;
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struct machine;
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struct perf_counts_values;
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struct perf_cpu_map;
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struct perf_data;
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struct perf_event_attr;
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struct perf_event_mmap_page;
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struct perf_sample;
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struct perf_session;
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struct perf_stat_config;
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struct perf_thread_map;
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struct perf_tool;
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struct record_opts;
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struct target;
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union perf_event;
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enum perf_record_synth {
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PERF_SYNTH_TASK = 1 << 0,
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PERF_SYNTH_MMAP = 1 << 1,
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PERF_SYNTH_CGROUP = 1 << 2,
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/* last element */
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PERF_SYNTH_MAX = 1 << 3,
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};
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#define PERF_SYNTH_ALL (PERF_SYNTH_MAX - 1)
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int parse_synth_opt(char *str);
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typedef int (*perf_event__handler_t)(struct perf_tool *tool, union perf_event *event,
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struct perf_sample *sample, struct machine *machine);
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int perf_event__synthesize_attrs(struct perf_tool *tool, struct evlist *evlist, perf_event__handler_t process);
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int perf_event__synthesize_attr(struct perf_tool *tool, struct perf_event_attr *attr, u32 ids, u64 *id, perf_event__handler_t process);
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int perf_event__synthesize_build_id(struct perf_tool *tool, struct dso *pos, u16 misc, perf_event__handler_t process, struct machine *machine);
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int perf_event__synthesize_cpu_map(struct perf_tool *tool, struct perf_cpu_map *cpus, perf_event__handler_t process, struct machine *machine);
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int perf_event__synthesize_event_update_cpus(struct perf_tool *tool, struct evsel *evsel, perf_event__handler_t process);
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int perf_event__synthesize_event_update_name(struct perf_tool *tool, struct evsel *evsel, perf_event__handler_t process);
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int perf_event__synthesize_event_update_scale(struct perf_tool *tool, struct evsel *evsel, perf_event__handler_t process);
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int perf_event__synthesize_event_update_unit(struct perf_tool *tool, struct evsel *evsel, perf_event__handler_t process);
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int perf_event__synthesize_extra_attr(struct perf_tool *tool, struct evlist *evsel_list, perf_event__handler_t process, bool is_pipe);
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int perf_event__synthesize_extra_kmaps(struct perf_tool *tool, perf_event__handler_t process, struct machine *machine);
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int perf_event__synthesize_features(struct perf_tool *tool, struct perf_session *session, struct evlist *evlist, perf_event__handler_t process);
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int perf_event__synthesize_id_index(struct perf_tool *tool, perf_event__handler_t process, struct evlist *evlist, struct machine *machine);
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int __perf_event__synthesize_id_index(struct perf_tool *tool, perf_event__handler_t process, struct evlist *evlist, struct machine *machine, size_t from);
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int perf_event__synthesize_id_sample(__u64 *array, u64 type, const struct perf_sample *sample);
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int perf_event__synthesize_kernel_mmap(struct perf_tool *tool, perf_event__handler_t process, struct machine *machine);
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int perf_event__synthesize_mmap_events(struct perf_tool *tool, union perf_event *event, pid_t pid, pid_t tgid, perf_event__handler_t process, struct machine *machine, bool mmap_data);
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int perf_event__synthesize_modules(struct perf_tool *tool, perf_event__handler_t process, struct machine *machine);
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int perf_event__synthesize_namespaces(struct perf_tool *tool, union perf_event *event, pid_t pid, pid_t tgid, perf_event__handler_t process, struct machine *machine);
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int perf_event__synthesize_cgroups(struct perf_tool *tool, perf_event__handler_t process, struct machine *machine);
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int perf_event__synthesize_sample(union perf_event *event, u64 type, u64 read_format, const struct perf_sample *sample);
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int perf_event__synthesize_stat_config(struct perf_tool *tool, struct perf_stat_config *config, perf_event__handler_t process, struct machine *machine);
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int perf_event__synthesize_stat_events(struct perf_stat_config *config, struct perf_tool *tool, struct evlist *evlist, perf_event__handler_t process, bool attrs);
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int perf_event__synthesize_stat_round(struct perf_tool *tool, u64 time, u64 type, perf_event__handler_t process, struct machine *machine);
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int perf_event__synthesize_stat(struct perf_tool *tool, struct perf_cpu cpu, u32 thread, u64 id, struct perf_counts_values *count, perf_event__handler_t process, struct machine *machine);
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int perf_event__synthesize_thread_map2(struct perf_tool *tool, struct perf_thread_map *threads, perf_event__handler_t process, struct machine *machine);
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int perf_event__synthesize_thread_map(struct perf_tool *tool, struct perf_thread_map *threads, perf_event__handler_t process, struct machine *machine, bool needs_mmap, bool mmap_data);
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int perf_event__synthesize_threads(struct perf_tool *tool, perf_event__handler_t process, struct machine *machine, bool needs_mmap, bool mmap_data, unsigned int nr_threads_synthesize);
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int perf_event__synthesize_tracing_data(struct perf_tool *tool, int fd, struct evlist *evlist, perf_event__handler_t process);
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int perf_event__synth_time_conv(const struct perf_event_mmap_page *pc, struct perf_tool *tool, perf_event__handler_t process, struct machine *machine);
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pid_t perf_event__synthesize_comm(struct perf_tool *tool, union perf_event *event, pid_t pid, perf_event__handler_t process, struct machine *machine);
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int perf_tool__process_synth_event(struct perf_tool *tool, union perf_event *event, struct machine *machine, perf_event__handler_t process);
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size_t perf_event__sample_event_size(const struct perf_sample *sample, u64 type, u64 read_format);
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int __machine__synthesize_threads(struct machine *machine, struct perf_tool *tool,
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struct target *target, struct perf_thread_map *threads,
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perf_event__handler_t process, bool needs_mmap, bool data_mmap,
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unsigned int nr_threads_synthesize);
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int machine__synthesize_threads(struct machine *machine, struct target *target,
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struct perf_thread_map *threads, bool needs_mmap, bool data_mmap,
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unsigned int nr_threads_synthesize);
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#ifdef HAVE_AUXTRACE_SUPPORT
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int perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr, struct perf_tool *tool,
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struct perf_session *session, perf_event__handler_t process);
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#else // HAVE_AUXTRACE_SUPPORT
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#include <errno.h>
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static inline int
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perf_event__synthesize_auxtrace_info(struct auxtrace_record *itr __maybe_unused,
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struct perf_tool *tool __maybe_unused,
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struct perf_session *session __maybe_unused,
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perf_event__handler_t process __maybe_unused)
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{
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return -EINVAL;
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}
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#endif // HAVE_AUXTRACE_SUPPORT
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#ifdef HAVE_LIBBPF_SUPPORT
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int perf_event__synthesize_bpf_events(struct perf_session *session, perf_event__handler_t process,
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struct machine *machine, struct record_opts *opts);
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#else // HAVE_LIBBPF_SUPPORT
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static inline int perf_event__synthesize_bpf_events(struct perf_session *session __maybe_unused,
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perf_event__handler_t process __maybe_unused,
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struct machine *machine __maybe_unused,
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struct record_opts *opts __maybe_unused)
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{
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return 0;
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}
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#endif // HAVE_LIBBPF_SUPPORT
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int perf_event__synthesize_for_pipe(struct perf_tool *tool,
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struct perf_session *session,
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struct perf_data *data,
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perf_event__handler_t process);
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#endif // __PERF_SYNTHETIC_EVENTS_H
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