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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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c351c28161
That means that almost everything you can do with 'perf report'
can be done with 'perf diff', for instance:
$ perf record -f find / > /dev/null
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.062 MB perf.data (~2699
samples) ] $ perf record -f find / > /dev/null
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.062 MB perf.data (~2687
samples) ] perf diff | head -8
9.02% +1.00% find libc-2.10.1.so [.] _IO_vfprintf_internal
2.91% -1.00% find [kernel] [k] __kmalloc
2.85% -1.00% find [kernel] [k] ext4_htree_store_dirent
1.99% -1.00% find [kernel] [k] _atomic_dec_and_lock
2.44% find [kernel] [k] half_md4_transform
$
So if you want to zoom into libc:
$ perf diff --dsos libc-2.10.1.so | head -8
37.34% find [.] _IO_vfprintf_internal
10.34% find [.] __GI_memmove
8.25% +2.00% find [.] _int_malloc
5.07% -1.00% find [.] __GI_mempcpy
7.62% +2.00% find [.] _int_free
$
And if there were multiple commands using libc, it is also
possible to aggregate them all by using --sort symbol:
$ perf diff --dsos libc-2.10.1.so --sort symbol | head -8
37.34% [.] _IO_vfprintf_internal
10.34% [.] __GI_memmove
8.25% +2.00% [.] _int_malloc
5.07% -1.00% [.] __GI_mempcpy
7.62% +2.00% [.] _int_free
$
The displacement column now is off by default, to use it:
perf diff -m --dsos libc-2.10.1.so --sort symbol | head -8
37.34% [.] _IO_vfprintf_internal
10.34% [.] __GI_memmove
8.25% +2.00% [.] _int_malloc
5.07% -1.00% +2 [.] __GI_mempcpy
7.62% +2.00% -1 [.] _int_free
$
Using -t/--field-separator can be used for scripting:
$ perf diff -t, -m --dsos libc-2.10.1.so --sort symbol | head -8
37.34, , ,[.] _IO_vfprintf_internal
10.34, , ,[.] __GI_memmove
8.25,+2.00%, ,[.] _int_malloc
5.07,-1.00%, +2,[.] __GI_mempcpy
7.62,+2.00%, -1,[.] _int_free
6.99,+1.00%, -1,[.] _IO_new_file_xsputn
1.89,-2.00%, +4,[.] __readdir64
$
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Frédéric Weisbecker <fweisbec@gmail.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1260978567-550-1-git-send-email-acme@infradead.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
108 lines
2.9 KiB
C
108 lines
2.9 KiB
C
#ifndef __PERF_SORT_H
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#define __PERF_SORT_H
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#include "../builtin.h"
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#include "util.h"
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#include "color.h"
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#include <linux/list.h>
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#include "cache.h"
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#include <linux/rbtree.h>
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#include "symbol.h"
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#include "string.h"
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#include "callchain.h"
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#include "strlist.h"
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#include "values.h"
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#include "../perf.h"
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#include "debug.h"
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#include "header.h"
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#include "parse-options.h"
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#include "parse-events.h"
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#include "thread.h"
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#include "sort.h"
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extern regex_t parent_regex;
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extern char *sort_order;
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extern char default_parent_pattern[];
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extern char *parent_pattern;
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extern char default_sort_order[];
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extern int sort__need_collapse;
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extern int sort__has_parent;
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extern char *field_sep;
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extern struct sort_entry sort_comm;
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extern struct sort_entry sort_dso;
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extern struct sort_entry sort_sym;
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extern struct sort_entry sort_parent;
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extern unsigned int dsos__col_width;
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extern unsigned int comms__col_width;
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extern unsigned int threads__col_width;
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extern enum sort_type sort__first_dimension;
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struct hist_entry {
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struct rb_node rb_node;
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u64 count;
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struct thread *thread;
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struct map *map;
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struct symbol *sym;
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u64 ip;
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char level;
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struct symbol *parent;
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struct callchain_node callchain;
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union {
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unsigned long position;
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struct hist_entry *pair;
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struct rb_root sorted_chain;
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};
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};
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enum sort_type {
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SORT_PID,
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SORT_COMM,
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SORT_DSO,
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SORT_SYM,
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SORT_PARENT
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};
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/*
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* configurable sorting bits
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*/
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struct sort_entry {
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struct list_head list;
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const char *header;
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int64_t (*cmp)(struct hist_entry *, struct hist_entry *);
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int64_t (*collapse)(struct hist_entry *, struct hist_entry *);
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size_t (*print)(FILE *fp, struct hist_entry *, unsigned int width);
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unsigned int *width;
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bool elide;
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};
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extern struct sort_entry sort_thread;
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extern struct list_head hist_entry__sort_list;
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void setup_sorting(const char * const usagestr[], const struct option *opts);
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extern int repsep_fprintf(FILE *fp, const char *fmt, ...);
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extern size_t sort__thread_print(FILE *, struct hist_entry *, unsigned int);
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extern size_t sort__comm_print(FILE *, struct hist_entry *, unsigned int);
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extern size_t sort__dso_print(FILE *, struct hist_entry *, unsigned int);
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extern size_t sort__sym_print(FILE *, struct hist_entry *, unsigned int __used);
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extern int64_t cmp_null(void *, void *);
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extern int64_t sort__thread_cmp(struct hist_entry *, struct hist_entry *);
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extern int64_t sort__comm_cmp(struct hist_entry *, struct hist_entry *);
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extern int64_t sort__comm_collapse(struct hist_entry *, struct hist_entry *);
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extern int64_t sort__dso_cmp(struct hist_entry *, struct hist_entry *);
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extern int64_t sort__sym_cmp(struct hist_entry *, struct hist_entry *);
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extern int64_t sort__parent_cmp(struct hist_entry *, struct hist_entry *);
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extern size_t sort__parent_print(FILE *, struct hist_entry *, unsigned int);
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extern int sort_dimension__add(const char *);
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void sort_entry__setup_elide(struct sort_entry *self, struct strlist *list,
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const char *list_name, FILE *fp);
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#endif /* __PERF_SORT_H */
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