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3c659eedad
Add an index of the event identifiers, in preparation for Intel PT. The event id (also called the sample id) is a unique number allocated by the kernel to the event created by perf_event_open(). Events can include the event id by having a sample type including PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER. Currently the main use of the event id is to match an event back to the evsel to which it belongs i.e. perf_evlist__id2evsel() The purpose of this patch is to make it possible to match an event back to the mmap from which it was read. The reason that is useful is because the mmap represents a time-ordered context (either for a cpu or for a thread). Intel PT decodes trace information on that basis. In full-trace mode, that information can be recorded when the Intel PT trace is read, but in sample-mode the Intel PT trace data is embedded in a sample and it is in that case that the "id index" is needed. So the mmaps are numbered (idx) and the cpu and tid recorded against the id by perf_evlist__set_sid_idx() which is called by perf_evlist__mmap_per_evsel(). That information is recorded on the perf.data file in the new "id index". idx, cpu and tid are added to struct perf_sample_id (which is the node of evlist's hash table to match ids to evsels). The information can be retrieved using perf_evlist__id2sid(). Note however this all depends on having a sample type including PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER, otherwise ids are not recorded. The "id index" is a synthesized event record which will be created when Intel PT sampling is used by calling perf_event__synthesize_id_index(). Signed-off-by: Adrian Hunter <adrian.hunter@intel.com> Acked-by: Jiri Olsa <jolsa@kernel.org> Cc: David Ahern <dsahern@gmail.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Cc: Jiri Olsa <jolsa@redhat.com> Cc: Namhyung Kim <namhyung@gmail.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Stephane Eranian <eranian@google.com> Link: http://lkml.kernel.org/r/1414417770-18602-2-git-send-email-adrian.hunter@intel.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
140 lines
4.3 KiB
C
140 lines
4.3 KiB
C
#ifndef __PERF_SESSION_H
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#define __PERF_SESSION_H
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#include "trace-event.h"
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#include "event.h"
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#include "header.h"
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#include "machine.h"
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#include "symbol.h"
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#include "thread.h"
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#include "data.h"
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#include "ordered-events.h"
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#include <linux/rbtree.h>
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#include <linux/perf_event.h>
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struct ip_callchain;
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struct thread;
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struct perf_session {
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struct perf_header header;
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struct machines machines;
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struct perf_evlist *evlist;
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struct trace_event tevent;
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struct events_stats stats;
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bool repipe;
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bool one_mmap;
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void *one_mmap_addr;
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u64 one_mmap_offset;
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struct ordered_events ordered_events;
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struct perf_data_file *file;
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};
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#define PRINT_IP_OPT_IP (1<<0)
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#define PRINT_IP_OPT_SYM (1<<1)
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#define PRINT_IP_OPT_DSO (1<<2)
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#define PRINT_IP_OPT_SYMOFFSET (1<<3)
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#define PRINT_IP_OPT_ONELINE (1<<4)
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#define PRINT_IP_OPT_SRCLINE (1<<5)
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struct perf_tool;
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struct perf_session *perf_session__new(struct perf_data_file *file,
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bool repipe, struct perf_tool *tool);
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void perf_session__delete(struct perf_session *session);
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void perf_event_header__bswap(struct perf_event_header *hdr);
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int perf_session__peek_event(struct perf_session *session, off_t file_offset,
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void *buf, size_t buf_sz,
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union perf_event **event_ptr,
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struct perf_sample *sample);
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int __perf_session__process_events(struct perf_session *session,
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u64 data_offset, u64 data_size, u64 size,
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struct perf_tool *tool);
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int perf_session__process_events(struct perf_session *session,
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struct perf_tool *tool);
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int perf_session_queue_event(struct perf_session *s, union perf_event *event,
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struct perf_tool *tool, struct perf_sample *sample,
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u64 file_offset);
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void perf_tool__fill_defaults(struct perf_tool *tool);
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int perf_session__deliver_event(struct perf_session *session,
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union perf_event *event,
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struct perf_sample *sample,
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struct perf_tool *tool, u64 file_offset);
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int perf_session__resolve_callchain(struct perf_session *session,
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struct perf_evsel *evsel,
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struct thread *thread,
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struct ip_callchain *chain,
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struct symbol **parent);
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bool perf_session__has_traces(struct perf_session *session, const char *msg);
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void perf_event__attr_swap(struct perf_event_attr *attr);
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int perf_session__create_kernel_maps(struct perf_session *session);
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void perf_session__set_id_hdr_size(struct perf_session *session);
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static inline
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struct machine *perf_session__find_machine(struct perf_session *session, pid_t pid)
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{
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return machines__find(&session->machines, pid);
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}
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static inline
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struct machine *perf_session__findnew_machine(struct perf_session *session, pid_t pid)
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{
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return machines__findnew(&session->machines, pid);
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}
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struct thread *perf_session__findnew(struct perf_session *session, pid_t pid);
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size_t perf_session__fprintf(struct perf_session *session, FILE *fp);
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size_t perf_session__fprintf_dsos(struct perf_session *session, FILE *fp);
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size_t perf_session__fprintf_dsos_buildid(struct perf_session *session, FILE *fp,
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bool (fn)(struct dso *dso, int parm), int parm);
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size_t perf_session__fprintf_nr_events(struct perf_session *session, FILE *fp);
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struct perf_evsel *perf_session__find_first_evtype(struct perf_session *session,
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unsigned int type);
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void perf_evsel__print_ip(struct perf_evsel *evsel, struct perf_sample *sample,
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struct addr_location *al,
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unsigned int print_opts, unsigned int stack_depth);
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int perf_session__cpu_bitmap(struct perf_session *session,
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const char *cpu_list, unsigned long *cpu_bitmap);
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void perf_session__fprintf_info(struct perf_session *s, FILE *fp, bool full);
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struct perf_evsel_str_handler;
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int __perf_session__set_tracepoints_handlers(struct perf_session *session,
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const struct perf_evsel_str_handler *assocs,
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size_t nr_assocs);
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#define perf_session__set_tracepoints_handlers(session, array) \
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__perf_session__set_tracepoints_handlers(session, array, ARRAY_SIZE(array))
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extern volatile int session_done;
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#define session_done() ACCESS_ONCE(session_done)
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int perf_event__process_id_index(struct perf_tool *tool,
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union perf_event *event,
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struct perf_session *session);
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int perf_event__synthesize_id_index(struct perf_tool *tool,
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perf_event__handler_t process,
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struct perf_evlist *evlist,
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struct machine *machine);
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#endif /* __PERF_SESSION_H */
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