linux/tools/perf
Sukadev Bhattiprolu 7d073b335e perf tools powerpc: Cache the DWARF debug info
Cache the DWARF debug info for DSO so we don't have to rebuild it for each
address in the DSO.

Note that dso__new() uses calloc() so don't need to set dso->dwfl to NULL.

	$ /tmp/perf.orig --version
	perf version 3.18.rc1.gc2661b8
	$ /tmp/perf.new --version
	perf version 3.18.rc1.g402d62
	$ perf stat -e cycles,instructions /tmp/perf.orig report -g > orig

	 Performance counter stats for '/tmp/perf.orig report -g':

	     6,428,177,183 cycles                    #    0.000 GHz
	     4,176,288,391 instructions              #    0.65  insns per cycle

	       1.840666132 seconds time elapsed

	$ perf stat -e cycles,instructions /tmp/perf.new report -g > new

	 Performance counter stats for '/tmp/perf.new report -g':

	       305,773,142 cycles                    #    0.000 GHz
	       276,048,272 instructions              #    0.90  insns per cycle

	       0.087693543 seconds time elapsed
	$ diff orig new
	$

Changelog[v2]:

[Arnaldo Carvalho] Cache in existing global objects rather than create
                   new static/globals in functions.

Reported-by: Anton Blanchard <anton@samba.org>
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: Anton Blanchard <anton@au1.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/20141022000958.GB2228@us.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2014-10-29 10:32:46 -02:00
..
arch perf tools powerpc: Cache the DWARF debug info 2014-10-29 10:32:46 -02:00
bench perf bench futex: Sanitize -q option in requeue 2014-09-29 15:43:26 -03:00
config perf tools: Fix GNU-only grep usage in Makefile 2014-09-17 17:08:09 -03:00
Documentation perf script: Add period data column 2014-10-17 15:21:30 -03:00
python perf python: Remove duplicate TID bit from mask 2013-08-07 17:35:25 -03:00
scripts perf script: Add callchain to generic and tracepoint events 2014-07-16 17:57:33 -03:00
tests perf report: Set callchain_param.record_mode for future use 2014-10-15 16:20:03 -03:00
ui perf top: Add a visual cue for toggle zeroing of samples 2014-10-15 15:47:48 -03:00
util perf tools powerpc: Cache the DWARF debug info 2014-10-29 10:32:46 -02:00
.gitignore perf tools: Add perf-with-kcore script 2014-09-17 17:08:08 -03:00
builtin-annotate.c perf tools: Remove hists from evsel 2014-10-14 17:32:52 -03:00
builtin-bench.c perf bench: Add --repeat option 2014-06-19 16:13:15 -03:00
builtin-buildid-cache.c perf buildid-cache: Use strerror_r instead of strerror 2014-08-15 13:07:59 -03:00
builtin-buildid-list.c perf session: Separating data file properties from session 2013-10-21 17:33:25 -03:00
builtin-diff.c perf diff: Add missing hists__init() call at tool start 2014-10-22 16:31:06 -03:00
builtin-evlist.c perf tools: Modify error code for when perf_session__new() fails 2014-09-26 12:32:58 -03:00
builtin-help.c perf help: Use strerror_r instead of strerror 2014-08-15 13:08:26 -03:00
builtin-inject.c perf tools: Modify error code for when perf_session__new() fails 2014-09-26 12:32:58 -03:00
builtin-kmem.c perf tools: Modify error code for when perf_session__new() fails 2014-09-26 12:32:58 -03:00
builtin-kvm.c perf kvm stat live: Enable events copying 2014-10-15 17:39:03 -03:00
builtin-list.c perf list: Add usage 2013-11-05 14:26:41 -03:00
builtin-lock.c perf tools: Modify error code for when perf_session__new() fails 2014-09-26 12:32:58 -03:00
builtin-mem.c perf tools: Modify error code for when perf_session__new() fails 2014-09-26 12:32:58 -03:00
builtin-probe.c perf probe: Trivial typo fix for --demangle 2014-10-29 10:30:18 -02:00
builtin-record.c perf evsel: No need to drag util/cgroup.h 2014-10-17 12:17:40 -03:00
builtin-report.c perf report: Set callchain_param.record_mode for future use 2014-10-15 16:20:03 -03:00
builtin-sched.c perf sched: Stop updating hists stats, not used 2014-10-09 11:46:35 -03:00
builtin-script.c perf script: Add period as a default output column 2014-10-17 15:22:19 -03:00
builtin-stat.c perf evsel: No need to drag util/cgroup.h 2014-10-17 12:17:40 -03:00
builtin-timechart.c perf tools: Modify error code for when perf_session__new() fails 2014-09-26 12:32:58 -03:00
builtin-top.c perf tools: Remove hists from evsel 2014-10-14 17:32:52 -03:00
builtin-trace.c perf trace: Use thread_{,_set}_priv helpers 2014-10-15 17:39:02 -03:00
builtin.h perf tools: Add new mem command for memory access profiling 2013-04-01 12:21:44 -03:00
command-list.txt perf tools: Add new mem command for memory access profiling 2013-04-01 12:21:44 -03:00
CREDITS
design.txt perf tools: Update some code references in design.txt 2014-03-18 18:17:06 -03:00
Makefile perf tools: Add 'build-test' make target 2014-01-16 16:26:26 -03:00
Makefile.perf tools lib api: Adopt fdarray class from perf's evlist 2014-09-25 16:46:55 -03:00
MANIFEST perf kvm: Add stat support on s390 2014-07-16 17:57:33 -03:00
perf-archive.sh perf archive: Make 'f' the last parameter for tar 2012-09-17 13:10:42 -03:00
perf-completion.sh perf sched: Introduce --list-cmds for use by scripts 2014-04-16 17:16:05 +02:00
perf-sys.h perf tools: Make CPUINFO_PROC an array to support different kernel versions 2014-10-29 10:27:36 -02:00
perf-with-kcore.sh perf tools: Add perf-with-kcore script 2014-09-17 17:08:08 -03:00
perf.c perf: Use strerror_r instead of strerror 2014-08-15 10:54:29 -03:00
perf.h perf tools: Move callchain config from record_opts to callchain_param 2014-09-26 12:40:33 -03:00