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Commit 7bec7a91 authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo Committed by Ingo Molnar
Browse files

perf report: Add --symbols parameter 

So that we can filter by symbol name.

The 'pfunct' utility in the 'dwarves' package can be used to
create a file with the functions one wants.

Example:

[acme@doppio pahole]$ pfunct /usr/lib/debug/usr/lib64/libdw-0.141.so.debug | grep dwarf > /tmp/dwarf.symbols
[acme@doppio pahole]$ wc -l /tmp/dwarf.symbols
93 /tmp/dwarf.symbols
[acme@doppio pahole]$ head -3 /tmp/dwarf.symbols
dwfl_addrdwarf
dwfl_module_getdwarf
dwfl_getdwarf
[acme@doppio pahole]$ perf report --sort comm,dso,symbol --comms pahole --dsos /usr/lib64/libdw-0.141.so --symbols file:///tmp/dwarf.symbols



    33.99%            pahole  /usr/lib64/libdw-0.141.so  [.] dwarf_tag
    29.07%            pahole  /usr/lib64/libdw-0.141.so  [.] dwarf_decl_file
    27.71%            pahole  /usr/lib64/libdw-0.141.so  [.] dwarf_getsrclines
     4.54%            pahole  /usr/lib64/libdw-0.141.so  0x00000000007400
     3.93%            pahole  /usr/lib64/libdw-0.141.so  [.] dwarf_decl_line
     0.46%            pahole  /usr/lib64/libdw-0.141.so  [.] dwarf_getlocation
     0.18%            pahole  /usr/lib64/libdw-0.141.so  [.] __libdwarf_next_prime
     0.13%            pahole  /usr/lib64/libdw-0.141.so  [.] dwarf_diecu

[acme@doppio pahole]$

Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Paul Mackerras <paulus@samba.org>
LKML-Reference: <1246399282-20934-4-git-send-email-acme@redhat.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent cc8b88b1

tools/perf/Documentation/perf-report.txt

+4 −0
Original line number Diff line number Diff line
@@ -28,6 +28,10 @@ OPTIONS 
--comms=::

	Only consider symbols in these comms. CSV that understands

	file://filename entries.

-S::

--symbols=::

	Only consider these symbols. CSV that understands

	file://filename entries.



SEE ALSO

--------

tools/perf/builtin-report.c

+8 −2
Original line number Diff line number Diff line
@@ -33,8 +33,8 @@ static char *vmlinux = NULL; 


static char		default_sort_order[] = "comm,dso";

static char		*sort_order = default_sort_order;

static char		*dso_list_str, *comm_list_str;

static struct strlist	*dso_list, *comm_list;

static char		*dso_list_str, *comm_list_str, *sym_list_str;

static struct strlist	*dso_list, *comm_list, *sym_list;



static int		input;

static int		show_mask = SHOW_KERNEL | SHOW_USER | SHOW_HV;
@@ -1281,6 +1281,9 @@ process_sample_event(event_t *event, unsigned long offset, unsigned long head) 
		if (dso_list && dso && dso->name && !strlist__has_entry(dso_list, dso->name))

			return 0;



		if (sym_list && sym && !strlist__has_entry(sym_list, sym->name))

			return 0;



		if (hist_entry__add(thread, map, dso, sym, ip, chain, level, period)) {

			eprintf("problem incrementing symbol count, skipping event\n");

			return -1;
@@ -1672,6 +1675,8 @@ static const struct option options[] = { 
		   "only consider symbols in these dsos"),

	OPT_STRING('C', "comms", &comm_list_str, "comm[,comm...]",

		   "only consider symbols in these comms"),

	OPT_STRING('S', "symbols", &sym_list_str, "symbol[,symbol...]",

		   "only consider these symbols"),

	OPT_END()

};
@@ -1726,6 +1731,7 @@ int cmd_report(int argc, const char **argv, const char *prefix) 


	setup_list(&dso_list, dso_list_str, "dso");

	setup_list(&comm_list, comm_list_str, "comm");

	setup_list(&sym_list, sym_list_str, "symbol");



	setup_pager();