cee75ac7ec
The events_stats.total field is too generic, rename it to .total_period, and also add a comment explaining that it is the sum of all the .period fields in samples, that is needed because we use auto-freq to avoid sampling artifacts. Ditto for events_stats.lost, that is the sum of all lost_event.lost fields, i.e. the number of events the kernel dropped. Looking at the users, builtin-sched.c can make use of these fields and stop doing it again. Cc: Frédéric Weisbecker <fweisbec@gmail.com> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Tom Zanussi <tzanussi@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
109 lines
3.1 KiB
C
109 lines
3.1 KiB
C
#ifndef __PERF_HIST_H
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#define __PERF_HIST_H
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#include <linux/types.h>
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#include "callchain.h"
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extern struct callchain_param callchain_param;
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struct hist_entry;
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struct addr_location;
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struct symbol;
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struct rb_root;
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struct objdump_line {
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struct list_head node;
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s64 offset;
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char *line;
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};
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void objdump_line__free(struct objdump_line *self);
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struct objdump_line *objdump__get_next_ip_line(struct list_head *head,
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struct objdump_line *pos);
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struct sym_hist {
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u64 sum;
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u64 ip[0];
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};
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struct sym_ext {
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struct rb_node node;
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double percent;
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char *path;
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};
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struct sym_priv {
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struct sym_hist *hist;
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struct sym_ext *ext;
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};
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/*
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* The kernel collects the number of events it couldn't send in a stretch and
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* when possible sends this number in a PERF_RECORD_LOST event. The number of
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* such "chunks" of lost events is stored in .nr_events[PERF_EVENT_LOST] while
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* total_lost tells exactly how many events the kernel in fact lost, i.e. it is
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* the sum of all struct lost_event.lost fields reported.
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*
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* The total_period is needed because by default auto-freq is used, so
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* multipling nr_events[PERF_EVENT_SAMPLE] by a frequency isn't possible to get
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* the total number of low level events, it is necessary to to sum all struct
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* sample_event.period and stash the result in total_period.
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*/
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struct events_stats {
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u64 total_period;
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u64 total_lost;
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u32 nr_events[PERF_RECORD_HEADER_MAX];
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u32 nr_unknown_events;
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};
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struct hists {
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struct rb_node rb_node;
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struct rb_root entries;
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u64 nr_entries;
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struct events_stats stats;
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u64 config;
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u64 event_stream;
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u32 type;
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u32 max_sym_namelen;
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};
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struct hist_entry *__hists__add_entry(struct hists *self,
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struct addr_location *al,
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struct symbol *parent, u64 count);
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extern int64_t hist_entry__cmp(struct hist_entry *, struct hist_entry *);
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extern int64_t hist_entry__collapse(struct hist_entry *, struct hist_entry *);
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int hist_entry__fprintf(struct hist_entry *self, struct hists *pair_hists,
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bool show_displacement, long displacement, FILE *fp,
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u64 total);
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int hist_entry__snprintf(struct hist_entry *self, char *bf, size_t size,
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struct hists *pair_hists, bool show_displacement,
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long displacement, bool color, u64 total);
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void hist_entry__free(struct hist_entry *);
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void hists__output_resort(struct hists *self);
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void hists__collapse_resort(struct hists *self);
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void hists__inc_nr_events(struct hists *self, u32 type);
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size_t hists__fprintf_nr_events(struct hists *self, FILE *fp);
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size_t hists__fprintf(struct hists *self, struct hists *pair,
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bool show_displacement, FILE *fp);
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int hist_entry__inc_addr_samples(struct hist_entry *self, u64 ip);
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int hist_entry__annotate(struct hist_entry *self, struct list_head *head);
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void hists__filter_by_dso(struct hists *self, const struct dso *dso);
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void hists__filter_by_thread(struct hists *self, const struct thread *thread);
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#ifdef NO_NEWT_SUPPORT
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static inline int hists__browse(struct hists *self __used,
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const char *helpline __used,
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const char *input_name __used)
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{
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return 0;
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}
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#else
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int hists__browse(struct hists *self, const char *helpline,
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const char *input_name);
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#endif
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#endif /* __PERF_HIST_H */
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