Skip to content

K
Kernel

openeuler / Kernel
1 年多 前同步成功

通知 8
Star 0
Fork 0
K
Kernel
切换分支/标签
  1. 06 12月, 2016 4 次提交
  3. 14 11月, 2016 1 次提交
  5. 28 10月, 2016 1 次提交
  7. 04 10月, 2016 1 次提交
    • A
      perf jevents: Program to convert JSON file · 80eeb67f
      由 Andi Kleen 提交于 
      This is a modified version of an earlier patch by Andi Kleen.

We expect architectures to create JSON files describing the performance
monitoring (PMU) events that each CPU model/family of the architecture
supports.

Following is an example of the JSON file entry for an x86 event:

    	[
    	...
    	{
    	"EventCode": "0x00",
    	"UMask": "0x01",
    	"EventName": "INST_RETIRED.ANY",
    	"BriefDescription": "Instructions retired from execution.",
    	"PublicDescription": "Instructions retired from execution.",
    	"Counter": "Fixed counter 1",
    	"CounterHTOff": "Fixed counter 1",
    	"SampleAfterValue": "2000003",
    	"SampleAfterValue": "2000003",
    	"MSRIndex": "0",
    	"MSRValue": "0",
    	"TakenAlone": "0",
    	"CounterMask": "0",
    	"Invert": "0",
    	"AnyThread": "0",
    	"EdgeDetect": "0",
    	"PEBS": "0",
    	"PRECISE_STORE": "0",
    	"Errata": "null",
    	"Offcore": "0"
    	},
    	...

    	]

All the PMU events supported by a CPU model/family must be grouped into
"topics" such as "Pipelining", "Floating-point", "Virtual-memory" etc.

All events belonging to a topic must be placed in a separate JSON file
(eg: "Pipelining.json") and all the topic JSON files for a CPU model must
be in a separate directory.

	Eg: for the CPU model "Silvermont_core":

    	$ ls tools/perf/pmu-events/arch/x86/Silvermont_core
    	Floating-point.json
    	Memory.json
    	Other.json
    	Pipelining.json
    	Virtualmemory.json

Finally, to allow multiple CPU models to share a single set of JSON files,
architectures must provide a mapping between a model and its set of events:

    	$ grep Silvermont tools/perf/pmu-events/arch/x86/mapfile.csv
    	GenuineIntel-6-4D,V13,Silvermont_core,core
    	GenuineIntel-6-4C,V13,Silvermont_core,core

which maps each CPU, identified by [vendor, family, model, version, type]
to a directory of JSON files. Thus two (or more) CPU models support the
set of PMU events listed in the directory.

    	tools/perf/pmu-events/arch/x86/Silvermont_core/

Given this organization of files, the program, jevents:

	- locates all JSON files for each CPU-model of the architecture,

	- parses all JSON files for the CPU-model and generates a C-style
	  "PMU-events table" (pmu-events.c) for the model

	- locates a mapfile for the architecture

	- builds a global table, mapping each model of CPU to the corresponding
	  PMU-events table.

The 'pmu-events.c' is generated when building perf and added to libperf.a.
The global table pmu_events_map[] table in this pmu-events.c will be used
in perf in a follow-on patch.

If the architecture does not have any JSON files or there is an error in
processing them, an empty mapping file is created. This would allow the
build of perf to proceed even if we are not able to provide aliases for
events.

The parser for JSON files allows parsing Intel style JSON event files. This
allows to use an Intel event list directly with perf. The Intel event lists
can be quite large and are too big to store in unswappable kernel memory.

The conversion from JSON to C-style is straight forward.  The parser knows
(very little) Intel specific information, and can be easily extended to
handle fields for other CPUs.

The parser code is partially shared with an independent parsing library,
which is 2-clause BSD licensed. To avoid any conflicts I marked those
files as BSD licensed too. As part of perf they become GPLv2.

Committer notes:

Fixes:

1) Limit maxfds to 512 to avoid nftd() segfaulting on alloca() with a
   big rlim_max, as in docker containers - acme

2) Make jevents a hostprog, supporting cross compilation - jolsa

3) Use HOSTCC for jevents final step - acme

4) Define _GNU_SOURCE for asprintf, as we can't use CC's EXTRA_CFLAGS,
  that has to have --sysroot on the Android NDK 24 - acme

5) Removed $(srctree)/tools/perf/pmu-events/pmu-events.c from the
   'clean' target, it is generated on $(OUTPUT)pmu-events/pmu-events.c,
   which is already taken care of in the original patch - acme
Signed-off-by: NAndi Kleen <ak@linux.intel.com>
Signed-off-by: NJiri Olsa <jolsa@redhat.com>
Signed-off-by: NSukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Acked-by: NIngo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Madhavan Srinivasan <maddy@linux.vnet.ibm.com>
Cc: linuxppc-dev@lists.ozlabs.org
Link: http://lkml.kernel.org/r/1473978296-20712-3-git-send-email-sukadev@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/20160927141846.GA6589@kravaSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      80eeb67f
  9. 14 9月, 2016 1 次提交
  11. 24 8月, 2016 2 次提交
  13. 03 8月, 2016 1 次提交
  15. 19 7月, 2016 2 次提交
  17. 14 7月, 2016 1 次提交
  19. 13 7月, 2016 5 次提交
  21. 23 6月, 2016 1 次提交
    • H
      perf tools: Let python use correct gcc for build_ext · 48d8d5db
      由 He Kuang 提交于 
      Currently, python uses host gcc instead of cross-compile gcc in the last
step of compiling build_ext(remove '--quiet' to show verbose):

  cross-gcc ...
  cross-gcc ...
  creating ~/out/python_ext_build/lib
  gcc -pthread -shared -Wl,-z ...

This is wrong but may not cause any errors unless the features detected
by cross-compiler do not match those for host compiler, and causes the
following errors:

  /usr/lib64/gcc/bin/ld: cannot find -lunwind-x86
  collect2: error: ld returned 1 exit status
  error: command 'gcc' failed with exit status 1
  cp: cannot stat ‘~/out/python_ext_build/lib/perf.so’: No such file or directory
  Makefile.perf:257: recipe for target '~/out/python/perf.so' failed
  make[1]: *** [~/out/python/perf.so] Error 1
  Makefile:68: recipe for target 'all' failed
  make: *** [all] Error 2

This issue is also reported and anwsered on stackoverflow.
Link: http://stackoverflow.com/questions/5986256/python-distutils-gcc-pathSigned-off-by: NHe Kuang <hekuang@huawei.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Ekaterina Tumanova <tumanova@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Kan Liang <kan.liang@intel.com>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Pekka Enberg <penberg@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1466578626-92406-5-git-send-email-hekuang@huawei.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      48d8d5db
  23. 08 4月, 2016 1 次提交
    • A
      perf tools: Build syscall table .c header from kernel's syscall_64.tbl · 1b700c99
      由 Arnaldo Carvalho de Melo 提交于 
      We used libaudit to map ids to syscall names and vice-versa, but that
imposes a delay in supporting new syscalls, having to wait for libaudit
to get those new syscalls on its tables.

To remove that delay, for x86_64 initially, grab a copy of
arch/x86/entry/syscalls/syscall_64.tbl and use it to generate those
tables.

Syscalls currently not available in audit-libs:

  # trace -e copy_file_range,membarrier,mlock2,pread64,pwrite64,timerfd_create,userfaultfd
  Error:	Invalid syscall copy_file_range, membarrier, mlock2, pread64, pwrite64, timerfd_create, userfaultfd
  Hint:	try 'perf list syscalls:sys_enter_*'
  Hint:	and: 'man syscalls'
  #

With this patch:

  # trace -e copy_file_range,membarrier,mlock2,pread64,pwrite64,timerfd_create,userfaultfd
    8505.733 ( 0.010 ms): gnome-shell/2519 timerfd_create(flags: 524288) = 36
    8506.688 ( 0.005 ms): gnome-shell/2519 timerfd_create(flags: 524288) = 40
   30023.097 ( 0.025 ms): qemu-system-x8/24629 pwrite64(fd: 18, buf: 0x7f63ae382000, count: 4096, pos: 529592320) = 4096
   31268.712 ( 0.028 ms): qemu-system-x8/24629 pwrite64(fd: 18, buf: 0x7f63afd8b000, count: 4096, pos: 2314133504) = 4096
   31268.854 ( 0.016 ms): qemu-system-x8/24629 pwrite64(fd: 18, buf: 0x7f63afda2000, count: 4096, pos: 2314137600) = 4096

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/n/tip-51xfjbxevdsucmnbc4ka5r88@git.kernel.org
[ Added make dep for 'prepare' in 'LIBPERF_IN', fix by Wang Nan to fix parallell build ]
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      1b700c99
  25. 06 4月, 2016 1 次提交
  27. 19 3月, 2016 1 次提交
  29. 12 2月, 2016 1 次提交
  31. 05 2月, 2016 1 次提交
  33. 27 1月, 2016 1 次提交
  35. 26 1月, 2016 1 次提交
    • W
      perf test: Add libbpf relocation checker · 7b6982ce
      由 Wang Nan 提交于 
      There's a bug in LLVM that it can generate unneeded relocation
information. See [1] and [2]. Libbpf should check the target section of
a relocation symbol.

This patch adds a testcase which references a global variable (BPF
doesn't support global variables). Before fixing libbpf, the new test
case can be loaded into kernel, the global variable acts like the first
map. It is incorrect.

Result:

  # ~/perf test BPF
  37: Test BPF filter                                          :
  37.1: Test basic BPF filtering                               : Ok
  37.2: Test BPF prologue generation                           : Ok
  37.3: Test BPF relocation checker                            : FAILED!

  # ~/perf test -v BPF
  ...
  libbpf: loading object '[bpf_relocation_test]' from buffer
  libbpf: section .strtab, size 126, link 0, flags 0, type=3
  libbpf: section .text, size 0, link 0, flags 6, type=1
  libbpf: section .data, size 0, link 0, flags 3, type=1
  libbpf: section .bss, size 0, link 0, flags 3, type=8
  libbpf: section func=sys_write, size 104, link 0, flags 6, type=1
  libbpf: found program func=sys_write
  libbpf: section .relfunc=sys_write, size 16, link 10, flags 0, type=9
  libbpf: section maps, size 16, link 0, flags 3, type=1
  libbpf: maps in [bpf_relocation_test]: 16 bytes
  libbpf: section license, size 4, link 0, flags 3, type=1
  libbpf: license of [bpf_relocation_test] is GPL
  libbpf: section version, size 4, link 0, flags 3, type=1
  libbpf: kernel version of [bpf_relocation_test] is 40400
  libbpf: section .symtab, size 144, link 1, flags 0, type=2
  libbpf: map 0 is "my_table"
  libbpf: collecting relocating info for: 'func=sys_write'
  libbpf: relocation: insn_idx=7
  Success unexpectedly: libbpf error when dealing with relocation
  test child finished with -1
  ---- end ----
  Test BPF filter subtest 2: FAILED!

[1] https://llvm.org/bugs/show_bug.cgi?id=26243
[2] https://patchwork.ozlabs.org/patch/571385/Signed-off-by: NWang Nan <wangnan0@huawei.com>
Tested-by: NArnaldo Carvalho de Melo <acme@redhat.com>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Li Zefan <lizefan@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Will Deacon <will.deacon@arm.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1453715801-7732-2-git-send-email-wangnan0@huawei.comSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      7b6982ce
  37. 16 1月, 2016 2 次提交
  39. 09 1月, 2016 1 次提交
    • N
      perf report: Show random usage tip on the help line · 14cbfbeb
      由 Namhyung Kim 提交于 
      Currently perf report only shows a help message "For a higher level
overview, try: perf report --sort comm,dso" unconditionally (even if
the sort keys were used).  Add more help tips and show randomly.

Load tips from ${prefix}/share/doc/perf-tip/tips.txt file.

  $ perf report | tail
      0.10%  swapper  [kernel.vmlinux]   [k] irq_exit
      0.09%  swapper  [kernel.vmlinux]   [k] flush_smp_call_function_queue
      0.08%  swapper  [kernel.vmlinux]   [k] native_write_msr_safe
      0.03%  swapper  [kernel.vmlinux]   [k] group_sched_in
      0.01%  perf     [kernel.vmlinux]   [k] native_write_msr_safe

  #
  # (Tip: Search options using a keyword: perf report -h <keyword>)
  #
Signed-off-by: NNamhyung Kim <namhyung@kernel.org>
Acked-by: NIngo Molnar <mingo@kernel.org>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Wang Nan <wangnan0@huawei.com>
Link: http://lkml.kernel.org/r/1452166913-27046-1-git-send-email-namhyung@kernel.org
[ Renamed it to perf_tip() and the parameter dirname to dirpath to fix the build on older distros ]
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      14cbfbeb
  41. 08 1月, 2016 1 次提交
  43. 07 1月, 2016 1 次提交
  45. 18 12月, 2015 1 次提交
  47. 14 12月, 2015 2 次提交
  49. 27 11月, 2015 1 次提交
    • J
      perf build: Fix traceevent plugins build race · 67befc65
      由 Jiri Olsa 提交于 
      Ingo reported following build failure:

  $ make clean install
  ...
    CC       plugin_kmem.o
  fixdep: error opening depfile: ./.plugin_hrtimer.o.d: No such file or directory
  /home/mingo/tip/tools/build/Makefile.build:77: recipe for target
  'plugin_hrtimer.o' failed
  make[3]: *** [plugin_hrtimer.o] Error 2
  Makefile:189: recipe for target 'plugin_hrtimer-in.o' failed
  make[2]: *** [plugin_hrtimer-in.o] Error 2
  Makefile.perf:414: recipe for target 'libtraceevent_plugins' failed
  make[1]: *** [libtraceevent_plugins] Error 2
  make[1]: *** Waiting for unfinished jobs....

Currently we have the install-traceevent-plugins target being dependent
on $(LIBTRACEEVENT), which will actualy not build any plugin. So the
install-traceevent-plugins target itself will try to build plugins,
but..

Plugins built is also triggered by perf build itself via
libtraceevent_plugins target.

This might cause a race having one make thread removing temp files from
another and result in above error. Fixing this by having proper plugins
build dependency before installing plugins.
Reported-and-Tested-by: N: Ingo Molnar <mingo@kernel.org>
Signed-off-by: NJiri Olsa <jolsa@kernel.org>
Cc: David Ahern <dsahern@gmail.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1448546044-28973-3-git-send-email-jolsa@kernel.orgSigned-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      67befc65
  51. 30 10月, 2015 1 次提交
  53. 28 10月, 2015 1 次提交
    • W
      perf tools: Make perf depend on libbpf · ed63f34c
      由 Wang Nan 提交于 
      By adding libbpf into perf's Makefile, this patch enables perf to build
libbpf if libelf is found and neither NO_LIBELF nor NO_LIBBPF is set.

The newly introduced code is similar to how libapi and libtraceevent
are wired into Makefile.perf.

MANIFEST is also updated for 'make perf-*-src-pkg'.

Append make_no_libbpf to tools/perf/tests/make.

The 'bpf' feature check is appended into default FEATURE_TESTS and
FEATURE_DISPLAY, so perf will check the API version of bpf in
/path/to/kernel/include/uapi/linux/bpf.h. Which should not fail except
when we are trying to port this code to an old kernel.

Error messages are also updated to notify users about the lack of BPF
support in 'perf record' if libelf is missing or the BPF API check
failed.

tools/lib/bpf is added to TAG_FOLDERS to allow us to navigate libbpf
files when working on perf using tools/perf/tags.
Signed-off-by: NWang Nan <wangnan0@huawei.com>
Acked-by: NAlexei Starovoitov <ast@plumgrid.com>
Cc: Brendan Gregg <brendan.d.gregg@gmail.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: David Ahern <dsahern@gmail.com>
Cc: He Kuang <hekuang@huawei.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Kaixu Xia <xiakaixu@huawei.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Zefan Li <lizefan@huawei.com>
Cc: pi3orama@163.com
Link: http://lkml.kernel.org/r/1444826502-49291-2-git-send-email-wangnan0@huawei.com
[ Document NO_LIBBPF in Makefile.perf, noted by Jiri Olsa ]
Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      ed63f34c
  55. 29 9月, 2015 2 次提交