1c02c4d2e9
In cbbc79a we introduced support for multiple events by introducing a new "event_stat_id" struct and then made several perf_session methods receive a point to it instead of a pointer to perf_session, and kept the event_stats and hists rb_tree in perf_session. While working on the new newt based browser, I realised that it would be better to introduce a new class, "hists" (short for "histograms"), renaming the "event_stat_id" struct and the perf_session methods that were really "hists" methods, as they manipulate only struct hists members, not touching anything in the other perf_session members. Other optimizations, such as calculating the maximum lenght of a symbol name present in an hists instance will be possible as we add them, avoiding a re-traversal just for finding that information. The rationale for the name "hists" to replace "event_stat_id" is that we may have multiple sets of hists for the same event_stat id, as, for instance, the 'perf diff' tool has, so event stat id is not what characterizes what this struct and the functions that manipulate it do. Cc: Eric B Munson <ebmunson@us.ibm.com> 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>
45 lines
1.3 KiB
C
45 lines
1.3 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 events_stats {
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u64 total;
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u64 lost;
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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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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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};
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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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u64 hists__output_resort(struct hists *self);
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void hists__collapse_resort(struct hists *self);
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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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#endif /* __PERF_HIST_H */
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