30d7a77dd5
Ingo Molnar wrote: > i just bisected a 'perf report' bug that would cause us to not > resolve all user-space symbols in a 'git gc' run to: > >f5812a7a33is first bad commit > commitf5812a7a33> Author: Arnaldo Carvalho de Melo <acme@redhat.com> > Date: Tue Jun 30 11:43:17 2009 -0300 > > perf_counter tools: Adjust only prelinked symbol's addresses Rename ->prelinked to ->adjust_symbols and making what was done only for prelinked libraries also to ET_EXEC binaries, such as /usr/bin/git: [acme@doppio pahole]$ readelf -h /usr/bin/git | grep Type Type: EXEC (Executable file) [acme@doppio pahole]$ And after installing the 'git-debuginfo' package, I get correct results: [acme@doppio linux-2.6-tip]$ perf report --sort comm,dso,symbol -d /usr/bin/git | head -20 # # (1139614 samples) # # Overhead Command Shared Object Symbol # ........ ................ ......................... ...... # 34.98% git /usr/bin/git [.] send_sideband 33.39% git /usr/bin/git [.] enter_repo 6.81% git /usr/bin/git [.] diff_opt_parse 4.95% git /usr/bin/git [.] is_repository_shallow 3.24% git /usr/bin/git [.] odb_mkstemp 1.39% git /usr/bin/git [.] output 1.34% git /usr/bin/git [.] xmmap 1.25% git /usr/bin/git [.] receive_pack_config 1.16% git /usr/bin/git [.] git_pathdup 0.90% git /usr/bin/git [.] read_object_with_reference 0.86% git /usr/bin/git [.] show_patch_diff 0.85% git /usr/bin/git 0x00000000095e2e 0.69% git /usr/bin/git [.] display [acme@doppio linux-2.6-tip]$ I'll check what are the last cases where we can't resolve symbols, like this 0x00000000095e2e later. And I guess this will fix the problems Mike were seeing too: [acme@doppio linux-2.6-tip]$ readelf -h ../build/perf/vmlinux | grep Type Type: EXEC (Executable file) [acme@doppio linux-2.6-tip]$ Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Mike Galbraith <efault@gmx.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Frederic Weisbecker <fweisbec@gmail.com> LKML-Reference: <new-submission> Signed-off-by: Ingo Molnar <mingo@elte.hu>
53 lines
1.3 KiB
C
53 lines
1.3 KiB
C
#ifndef _PERF_SYMBOL_
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#define _PERF_SYMBOL_ 1
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#include <linux/types.h>
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#include "types.h"
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#include <linux/list.h>
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#include <linux/rbtree.h>
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#include "module.h"
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struct symbol {
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struct rb_node rb_node;
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u64 start;
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u64 end;
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u64 obj_start;
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u64 hist_sum;
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u64 *hist;
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struct module *module;
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void *priv;
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char name[0];
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};
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struct dso {
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struct list_head node;
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struct rb_root syms;
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struct symbol *(*find_symbol)(struct dso *, u64 ip);
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unsigned int sym_priv_size;
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unsigned char adjust_symbols;
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char name[0];
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};
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const char *sym_hist_filter;
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typedef int (*symbol_filter_t)(struct dso *self, struct symbol *sym);
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struct dso *dso__new(const char *name, unsigned int sym_priv_size);
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void dso__delete(struct dso *self);
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static inline void *dso__sym_priv(struct dso *self, struct symbol *sym)
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{
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return ((void *)sym) - self->sym_priv_size;
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}
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struct symbol *dso__find_symbol(struct dso *self, u64 ip);
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int dso__load_kernel(struct dso *self, const char *vmlinux,
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symbol_filter_t filter, int verbose, int modules);
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int dso__load_modules(struct dso *self, symbol_filter_t filter, int verbose);
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int dso__load(struct dso *self, symbol_filter_t filter, int verbose);
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size_t dso__fprintf(struct dso *self, FILE *fp);
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void symbol__init(void);
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#endif /* _PERF_SYMBOL_ */
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