[GIT PULL 0/1] perf/urgent fix for S/390

[Arnaldo Carvalho de Melo]

From: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>

Hi Ingo,

	Please consider pulling this one-liner,

Regards,

- Arnaldo

Test results at the end of this message, as usual.

The following changes since commit 6a8a75f3235724c5941a33e287b2f98966ad14c5:

  Revert "perf/core: Drop kernel samples even though :u is specified" (2017-07-11 10:56:54 +0200)

are available in the git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git tags/perf-urgent-for-mingo-4.13-20170712

for you to fetch changes up to 4b1303d0b01440f224cf81493b7e8e43d9b4965e:

  perf symbols: Accept zero as the kernel base address (2017-07-12 11:47:05 -0300)

----------------------------------------------------------------
perf/urgent fix:

- Accept zero as the kernel base address, to resolve symbols on
  architectures that don't partition the virtual address space in
  kernel/user, S/390, is one of such architectures and was where
  this problem was noticed. (Arnaldo Carvalho de Melo)

Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>

----------------------------------------------------------------
Arnaldo Carvalho de Melo (1):
      perf symbols: Accept zero as the kernel base address

 tools/perf/util/machine.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Test results:

The first ones are container (docker) based builds of tools/perf with and
without libelf support, objtool where it is supported and samples/bpf/, ditto.
Where clang is available, it is also used to build perf with/without libelf.

Several are cross builds, the ones with -x-ARCH, and the android one, and those
may not have all the features built, due to lack of multi-arch devel packages,
available and being used so far on just a few, like
debian:experimental-x-{arm64,mipsel}.

The 'perf test' one will perform a variety of tests exercising
tools/perf/util/, tools/lib/{bpf,traceevent,etc}, as well as run perf commands
with a variety of command line event specifications to then intercept the
sys_perf_event syscall to check that the perf_event_attr fields are set up as
expected, among a variety of other unit tests.

Then there is the 'make -C tools/perf build-test' ones, that build tools/perf/
with a variety of feature sets, exercising the build with an incomplete set of
features as well as with a complete one. It is planned to have it run on each
of the containers mentioned above, using some container orchestration
infrastructure. Get in contact if interested in helping having this in place.

  # dm
   1 alpine:3.4: Ok
   2 alpine:3.5: Ok
   3 alpine:3.6: Ok
   4 alpine:edge: Ok
   5 android-ndk:r12b-arm: Ok
   6 archlinux:latest: Ok
   7 centos:5: Ok
   8 centos:6: Ok
   9 centos:7: Ok
  10 debian:7: Ok
  11 debian:8: Ok
  12 debian:9: Ok
  13 debian:experimental: Ok
  14 debian:experimental-x-arm64: Ok
  15 debian:experimental-x-mips: Ok
  16 debian:experimental-x-mips64: Ok
  17 debian:experimental-x-mipsel: Ok
  18 fedora:20: Ok
  19 fedora:21: Ok
  20 fedora:22: Ok
  21 fedora:23: Ok
  22 fedora:24: Ok
  23 fedora:24-x-ARC-uClibc: Ok
  24 fedora:25: Ok
  25 fedora:26: Ok
  26 fedora:rawhide: Ok
  27 mageia:5: Ok
  28 opensuse:13.2: Ok
  29 opensuse:42.1: Ok
  30 opensuse:42.2: Ok
  31 opensuse:tumbleweed: Ok
  32 oraclelinux:6: Ok
  33 oraclelinux:7: Ok
  34 ubuntu:12.04.5: Ok
  35 ubuntu:14.04.4: Ok
  36 ubuntu:14.04.4-x-linaro-arm64: Ok
  37 ubuntu:15.10: Ok
  38 ubuntu:16.04: Ok
  39 ubuntu:16.04-x-arm: Ok
  40 ubuntu:16.04-x-arm64: Ok
  41 ubuntu:16.04-x-powerpc: Ok
  42 ubuntu:16.04-x-powerpc64: Ok
  43 ubuntu:16.04-x-powerpc64el: Ok
  44 ubuntu:16.04-x-s390: Ok
  45 ubuntu:16.10: Ok
  46 ubuntu:17.04: Ok
  47 ubuntu:17.10: Ok
  #

  # uname -a
  Linux jouet 4.12.0-rc6+ #3 SMP Tue Jun 27 15:12:38 -03 2017 x86_64 x86_64 x86_64 GNU/Linux
  # perf test
   1: vmlinux symtab matches kallsyms            : Ok
   2: Detect openat syscall event                : Ok
   3: Detect openat syscall event on all cpus    : Ok
   4: Read samples using the mmap interface      : Ok
   5: Parse event definition strings             : Ok
   6: Simple expression parser                   : Ok
   7: PERF_RECORD_* events & perf_sample fields  : Ok
   8: Parse perf pmu format                      : Ok
   9: DSO data read                              : Ok
  10: DSO data cache                             : Ok
  11: DSO data reopen                            : Ok
  12: Roundtrip evsel->name                      : Ok
  13: Parse sched tracepoints fields             : Ok
  14: syscalls:sys_enter_openat event fields     : Ok
  15: Setup struct perf_event_attr               : Ok
  16: Match and link multiple hists              : Ok
  17: 'import perf' in python                    : Ok
  18: Breakpoint overflow signal handler         : Ok
  19: Breakpoint overflow sampling               : Ok
  20: Number of exit events of a simple workload : Ok
  21: Software clock events period values        : Ok
  22: Object code reading                        : Ok
  23: Sample parsing                             : Ok
  24: Use a dummy software event to keep tracking: Ok
  25: Parse with no sample_id_all bit set        : Ok
  26: Filter hist entries                        : Ok
  27: Lookup mmap thread                         : Ok
  28: Share thread mg                            : Ok
  29: Sort output of hist entries                : Ok
  30: Cumulate child hist entries                : Ok
  31: Track with sched_switch                    : Ok
  32: Filter fds with revents mask in a fdarray  : Ok
  33: Add fd to a fdarray, making it autogrow    : Ok
  34: kmod_path__parse                           : Ok
  35: Thread map                                 : Ok
  36: LLVM search and compile                    :
  36.1: Basic BPF llvm compile                    : Ok
  36.2: kbuild searching                          : Ok
  36.3: Compile source for BPF prologue generation: Ok
  36.4: Compile source for BPF relocation         : Ok
  37: Session topology                           : Ok
  38: BPF filter                                 :
  38.1: Basic BPF filtering                      : Skip
  38.2: BPF pinning                              : Skip
  38.3: BPF prologue generation                  : Skip
  38.4: BPF relocation checker                   : Skip
  39: Synthesize thread map                      : Ok
  40: Remove thread map                          : Ok
  41: Synthesize cpu map                         : Ok
  42: Synthesize stat config                     : Ok
  43: Synthesize stat                            : Ok
  44: Synthesize stat round                      : Ok
  45: Synthesize attr update                     : Ok
  46: Event times                                : Ok
  47: Read backward ring buffer                  : Ok
  48: Print cpu map                              : Ok
  49: Probe SDT events                           : Ok
  50: is_printable_array                         : Ok
  51: Print bitmap                               : Ok
  52: perf hooks                                 : Ok
  53: builtin clang support                      : Skip (not compiled in)
  54: unit_number__scnprintf                     : Ok
  55: x86 rdpmc                                  : Ok
  56: Convert perf time to TSC                   : Ok
  57: DWARF unwind                               : Ok
  58: x86 instruction decoder - new instructions : Ok
  59: Intel cqm nmi context read                 : Skip
  #

  $ make -C tools/perf build-test
  make: Entering directory '/home/acme/git/linux/tools/perf'
  - tarpkg: ./tests/perf-targz-src-pkg .
                   make_pure_O: make
            make_install_bin_O: make install-bin
              make_clean_all_O: make clean all
              make_no_libelf_O: make NO_LIBELF=1
                   make_tags_O: make tags
            make_no_libaudit_O: make NO_LIBAUDIT=1
             make_no_libnuma_O: make NO_LIBNUMA=1
             make_util_map_o_O: make util/map.o
           make_no_libpython_O: make NO_LIBPYTHON=1
           make_no_libunwind_O: make NO_LIBUNWIND=1
                  make_no_ui_O: make NO_NEWT=1 NO_SLANG=1 NO_GTK2=1
                make_no_newt_O: make NO_NEWT=1
        make_with_babeltrace_O: make LIBBABELTRACE=1
         make_with_clangllvm_O: make LIBCLANGLLVM=1
       make_util_pmu_bison_o_O: make util/pmu-bison.o
                    make_doc_O: make doc
           make_no_backtrace_O: make NO_BACKTRACE=1
              make_no_libbpf_O: make NO_LIBBPF=1
                  make_debug_O: make DEBUG=1
            make_no_auxtrace_O: make NO_AUXTRACE=1
                 make_static_O: make LDFLAGS=-static
             make_no_scripts_O: make NO_LIBPYTHON=1 NO_LIBPERL=1
                make_minimal_O: make NO_LIBPERL=1 NO_LIBPYTHON=1 NO_NEWT=1 NO_GTK2=1 NO_DEMANGLE=1 NO_LIBELF=1 NO_LIBUNWIND=1 NO_BACKTRACE=1 NO_LIBNUMA=1 NO_LIBAUDIT=1 NO_LIBBIONIC=1 NO_LIBDW_DWARF_UNWIND=1 NO_AUXTRACE=1 NO_LIBBPF=1 NO_LIBCRYPTO=1 NO_SDT=1 NO_JVMTI=1
                 make_perf_o_O: make perf.o
                make_no_gtk2_O: make NO_GTK2=1
            make_no_demangle_O: make NO_DEMANGLE=1
   make_install_prefix_slash_O: make install prefix=/tmp/krava/
             make_no_libperl_O: make NO_LIBPERL=1
         make_install_prefix_O: make install prefix=/tmp/krava
           make_no_libbionic_O: make NO_LIBBIONIC=1
               make_no_slang_O: make NO_SLANG=1
                make_install_O: make install
  make_no_libdw_dwarf_unwind_O: make NO_LIBDW_DWARF_UNWIND=1
                   make_help_O: make help
  OK
  make: Leaving directory '/home/acme/git/linux/tools/perf'
  $