diff options
author | Adrian Hunter <adrian.hunter@intel.com> | 2015-07-17 16:33:42 (GMT) |
---|---|---|
committer | Arnaldo Carvalho de Melo <acme@redhat.com> | 2015-08-17 14:11:37 (GMT) |
commit | 5efb1d5489520ce72232bbc28e9156f0ebddc44e (patch) | |
tree | a5637c81f5d6576c848a6a3d1ef91790ab1e7b46 /tools/perf/arch | |
parent | 90e457f7be0870052724b2d9c2c106e5847f2c19 (diff) | |
download | linux-5efb1d5489520ce72232bbc28e9156f0ebddc44e.tar.xz |
perf tools: Take Intel PT into use
To record an AUX area, the weak function auxtrace_record__init() must be
implemented.
Equally to decode an AUX area, the AUX area tracing type must be added
to the perf_event__process_auxtrace_info() function.
This patch makes those two changes plus hooks up default config for the
intel_pt PMU. Also some brief documentation is provided for using the
tools with intel_pt.
Commiter note:
E.g:
[root@perf4 ~]# dmesg
451 [0.405807] Performance Events: PEBS fmt2+, 16-deep LBR, Broadwell events, full-width counters, Intel PMU driver.
[root@perf4 ~]# perf --version
perf version 4.1.g53874a
[root@perf4 ~]# perf record -e intel_pt//u -a sleep 10
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.383 MB perf.data ]
[root@perf4 ~]# perf evlist
intel_pt//u
sched:sched_switch
dummy:u
[root@perf4 ~]# perf report --stdio
# To display the perf.data header info, please use --header/--header-only options.
#
#
# Total Lost Samples: 0
#
# Samples: 0 of event 'intel_pt//u'
# Event count (approx.): 0
#
# Overhead Command Shared Object Symbol
# ........ ....... ............. ......
#
# Samples: 393 of event 'sched:sched_switch'
# Event count (approx.): 393
#
# Overhead Command Shared Object Symbol
# ........ .............. ................ ..............
49.62% swapper [kernel.vmlinux] [k] __schedule
10.69% rcu_sched [kernel.vmlinux] [k] __schedule
6.62% rcuos/0 [kernel.vmlinux] [k] __schedule
5.60% kworker/0:1 [kernel.vmlinux] [k] __schedule
3.56% rcuos/3 [kernel.vmlinux] [k] __schedule
3.05% kworker/u384:2 [kernel.vmlinux] [k] __schedule
2.54% kworker/2:0 [kernel.vmlinux] [k] __schedule
2.54% tuned [kernel.vmlinux] [k] __schedule
<SNIP>
# Samples: 0 of event 'dummy:u'
# Event count (approx.): 0
#
# Overhead Command Shared Object Symbol
# ........ ....... ............. ......
# Samples: 28 of event 'instructions:u'
# Event count (approx.): 5030172
#
# Overhead Command Shared Object Symbol
# ........ .......... ................... ................................
#
21.43% tuned libpython2.7.so.1.0 [.] PyEval_EvalFrameEx
|
---PyEval_EvalFrameEx
|
|--83.33%-- PyEval_EvalCodeEx
| PyEval_EvalFrameEx
| |
| |--60.00%-- PyEval_EvalCodeEx
| | PyEval_EvalFrameEx
| | PyEval_EvalFrameEx
| |
| --40.00%-- PyEval_EvalFrameEx
|
--16.67%-- PyEval_EvalFrameEx
PyEval_EvalCodeEx
PyEval_EvalFrameEx
PyEval_EvalCodeEx
PyEval_EvalFrameEx
PyEval_EvalFrameEx
14.29% tuned libpython2.7.so.1.0 [.] _PyType_Lookup
|
---_PyType_Lookup
_PyObject_GenericGetAttrWithDict
PyEval_EvalFrameEx
PyEval_EvalCodeEx
PyEval_EvalFrameEx
PyEval_EvalCodeEx
PyEval_EvalFrameEx
|
|--75.00%-- PyEval_EvalFrameEx
|
--25.00%-- PyEval_EvalCodeEx
PyEval_EvalFrameEx
PyEval_EvalFrameEx
3.57% irqbalance irqbalance [.] 0x0000000000004038
|
---0x4038
0x4761
0x4761
0x4761
0x49f1
0x2295
3.57% irqbalance libc-2.17.so [.] __GI_____strtoull_l_internal
|
---__GI_____strtoull_l_internal
0x6f49
0x229a
3.57% irqbalance libc-2.17.so [.] __strchrnul
|
---__strchrnul
vfprintf
__vsprintf_chk
__sprintf_chk
0x2724
0x4038
0x2331
3.57% irqbalance libc-2.17.so [.] __strstr_sse42
|
---__strstr_sse42
0x71e0
0x229f
# And now to some userspace ftrace on uninstrumented binaries 8-) :
# Hand edited to make it a bit more compact, replacing /home/acme/bin/perf
# with /bin/perf:
[root@perf4 ~]# perf script
perf 8921 [3] 7.310889: 1 branches:u: 0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
perf 8921 [3] 7.310889: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310889: 1 branches:u: 481694 perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310889: 1 branches:u: 481630 perf_evlist__enable (/bin/perf) => 4816d8 perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310889: 1 branches:u: 4816de perf_evlist__enable (/bin/perf) => 48164f perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310889: 1 branches:u: 481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310889: 1 branches:u: 481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
perf 8921 [3] 7.310889: 1 branches:u: 41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
perf 8921 [3] 7.310889: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
perf 8921 [3] 7.310890: 1 branches:u: 0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
perf 8921 [3] 7.310890: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310890: 1 branches:u: 481694 perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310890: 1 branches:u: 481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310890: 1 branches:u: 481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
perf 8921 [3] 7.310890: 1 branches:u: 41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
perf 8921 [3] 7.310890: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
perf 8921 [3] 7.310893: 1 branches:u: 0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
perf 8921 [3] 7.310893: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310893: 1 branches:u: 4816a8 perf_evlist__enable (/bin/perf) => 4815f8 perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310893: 1 branches:u: 4815fe perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310893: 1 branches:u: 481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310893: 1 branches:u: 481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
perf 8921 [3] 7.310893: 1 branches:u: 41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
perf 8921 [3] 7.310893: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
perf 8921 [3] 7.310956: 1 branches:u: 0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
perf 8921 [3] 7.310956: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310956: 1 branches:u: 481694 perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310956: 1 branches:u: 481630 perf_evlist__enable (/bin/perf) => 4816d8 perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310956: 1 branches:u: 4816de perf_evlist__enable (/bin/perf) => 48164f perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310956: 1 branches:u: 481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310956: 1 branches:u: 481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
perf 8921 [3] 7.310956: 1 branches:u: 41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
perf 8921 [3] 7.310956: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
perf 8921 [3] 7.310961: 1 branches:u: 0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
perf 8921 [3] 7.310961: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310961: 1 branches:u: 481694 perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310961: 1 branches:u: 481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310961: 1 branches:u: 481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
perf 8921 [3] 7.310961: 1 branches:u: 41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
perf 8921 [3] 7.310961: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
perf 8921 [3] 7.310968: 1 branches:u: 0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
perf 8921 [3] 7.310968: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310968: 1 branches:u: 4816a8 perf_evlist__enable (/bin/perf) => 4815f8 perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310968: 1 branches:u: 4815fe perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310968: 1 branches:u: 481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.310968: 1 branches:u: 481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
perf 8921 [3] 7.310968: 1 branches:u: 41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
perf 8921 [3] 7.310968: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
perf 8921 [3] 7.311040: 1 branches:u: 0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
perf 8921 [3] 7.311040: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.311040: 1 branches:u: 481694 perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.311040: 1 branches:u: 481630 perf_evlist__enable (/bin/perf) => 4816d8 perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.311040: 1 branches:u: 4816de perf_evlist__enable (/bin/perf) => 48164f perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.311040: 1 branches:u: 481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.311040: 1 branches:u: 481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
perf 8921 [3] 7.311040: 1 branches:u: 41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
perf 8921 [3] 7.311040: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
perf 8921 [3] 7.311046: 1 branches:u: 0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
perf 8921 [3] 7.311046: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.311046: 1 branches:u: 481694 perf_evlist__enable (/bin/perf) => 481614 perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.311046: 1 branches:u: 481652 perf_evlist__enable (/bin/perf) => 48165f perf_evlist__enable (/bin/perf)
perf 8921 [3] 7.311046: 1 branches:u: 481684 perf_evlist__enable (/bin/perf) => 41d250 ioctl@plt (/bin/perf)
perf 8921 [3] 7.311046: 1 branches:u: 41d250 ioctl@plt (/bin/perf) => 7fcecadbf250 __GI___ioctl (/usr/lib64/libc-2.17.so)
perf 8921 [3] 7.311046: 1 branches:u: 7fcecadbf255 __GI___ioctl (/usr/lib64/libc-2.17.so) => 0 [unknown] ([unknown])
perf 8921 [3] 7.311050: 1 branches:u: 0 [unknown] ([unknown]) => 7fcecadbf257 __GI___ioctl (/usr/lib64/libc-2.17.so)
perf 8921 [3] 7.311050: 1 branches:u: 7fcecadbf25f __GI___ioctl (/usr/lib64/libc-2.17.so) => 481689 perf_evlist__enable (/bin/perf)
:
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Tested-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Link: http://lkml.kernel.org/r/1437150840-31811-8-git-send-email-adrian.hunter@intel.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools/perf/arch')
-rw-r--r-- | tools/perf/arch/x86/util/Build | 2 | ||||
-rw-r--r-- | tools/perf/arch/x86/util/auxtrace.c | 38 | ||||
-rw-r--r-- | tools/perf/arch/x86/util/pmu.c | 15 |
3 files changed, 55 insertions, 0 deletions
diff --git a/tools/perf/arch/x86/util/Build b/tools/perf/arch/x86/util/Build index 1396088..a8be9f9 100644 --- a/tools/perf/arch/x86/util/Build +++ b/tools/perf/arch/x86/util/Build @@ -1,5 +1,6 @@ libperf-y += header.o libperf-y += tsc.o +libperf-y += pmu.o libperf-y += kvm-stat.o libperf-$(CONFIG_DWARF) += dwarf-regs.o @@ -7,4 +8,5 @@ libperf-$(CONFIG_DWARF) += dwarf-regs.o libperf-$(CONFIG_LIBUNWIND) += unwind-libunwind.o libperf-$(CONFIG_LIBDW_DWARF_UNWIND) += unwind-libdw.o +libperf-$(CONFIG_AUXTRACE) += auxtrace.o libperf-$(CONFIG_AUXTRACE) += intel-pt.o diff --git a/tools/perf/arch/x86/util/auxtrace.c b/tools/perf/arch/x86/util/auxtrace.c new file mode 100644 index 0000000..e7654b5 --- /dev/null +++ b/tools/perf/arch/x86/util/auxtrace.c @@ -0,0 +1,38 @@ +/* + * auxtrace.c: AUX area tracing support + * Copyright (c) 2013-2014, Intel Corporation. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms and conditions of the GNU General Public License, + * version 2, as published by the Free Software Foundation. + * + * This program is distributed in the hope it will be useful, but WITHOUT + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for + * more details. + * + */ + +#include "../../util/header.h" +#include "../../util/auxtrace.h" +#include "../../util/intel-pt.h" + +struct auxtrace_record *auxtrace_record__init(struct perf_evlist *evlist __maybe_unused, + int *err) +{ + char buffer[64]; + int ret; + + *err = 0; + + ret = get_cpuid(buffer, sizeof(buffer)); + if (ret) { + *err = ret; + return NULL; + } + + if (!strncmp(buffer, "GenuineIntel,", 13)) + return intel_pt_recording_init(err); + + return NULL; +} diff --git a/tools/perf/arch/x86/util/pmu.c b/tools/perf/arch/x86/util/pmu.c new file mode 100644 index 0000000..fd11cc3 --- /dev/null +++ b/tools/perf/arch/x86/util/pmu.c @@ -0,0 +1,15 @@ +#include <string.h> + +#include <linux/perf_event.h> + +#include "../../util/intel-pt.h" +#include "../../util/pmu.h" + +struct perf_event_attr *perf_pmu__get_default_config(struct perf_pmu *pmu __maybe_unused) +{ +#ifdef HAVE_AUXTRACE_SUPPORT + if (!strcmp(pmu->name, INTEL_PT_PMU_NAME)) + return intel_pt_pmu_default_config(pmu); +#endif + return NULL; +} |