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  1. 14 Aug, 2020 22 commits
  3. 13 Aug, 2020 10 commits
    • Alexander Gordeev's avatar
      perf bench numa: Use numa_node_to_cpus() to bind tasks to nodes · 2db13a9b
      Alexander Gordeev authored 
      It is currently assumed that each node contains at most nr_cpus/nr_nodes
CPUs and nodes' CPU ranges do not overlap.

That assumption is generally incorrect as there are archs where a CPU
number does not depend on to its node number.

This update removes the described assumption by simply calling
numa_node_to_cpus() interface and using the returned mask for binding
CPUs to nodes.

Also, variable types and names made consistent in functions using
cpumask.
Signed-off-by: default avatarAlexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: default avatarSrikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Balamuruhan S <bala24@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Link: http://lore.kernel.org/lkml/20200813113247.GA2014@oc3871087118.ibm.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      2db13a9b
    • Alexander Gordeev's avatar
      perf bench numa: Fix cpumask memory leak in node_has_cpus() · 509f68e3
      Alexander Gordeev authored 
      Couple numa_allocate_cpumask() and numa_free_cpumask() functions
Signed-off-by: default avatarAlexander Gordeev <agordeev@linux.ibm.com>
Reviewed-by: default avatarSrikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Balamuruhan S <bala24@linux.vnet.ibm.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Satheesh Rajendran <sathnaga@linux.vnet.ibm.com>
Link: http://lore.kernel.org/lkml/20200813113041.GA1685@oc3871087118.ibm.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      509f68e3
    • Daniel Díaz's avatar
      tools build feature: Quote CC and CXX for their arguments · fa5c8931
      Daniel Díaz authored 
      When using a cross-compilation environment, such as OpenEmbedded,
the CC an CXX variables are set to something more than just a
command: there are arguments (such as --sysroot) that need to be
passed on to the compiler so that the right set of headers and
libraries are used.

For the particular case that our systems detected, CC is set to
the following:

  export CC="aarch64-linaro-linux-gcc  --sysroot=/oe/build/tmp/work/machine/perf/1.0-r9/recipe-sysroot"

Without quotes, detection is as follows:

  Auto-detecting system features:
  ...                         dwarf: [ OFF ]
  ...            dwarf_getlocations: [ OFF ]
  ...                         glibc: [ OFF ]
  ...                          gtk2: [ OFF ]
  ...                        libbfd: [ OFF ]
  ...                        libcap: [ OFF ]
  ...                        libelf: [ OFF ]
  ...                       libnuma: [ OFF ]
  ...        numa_num_possible_cpus: [ OFF ]
  ...                       libperl: [ OFF ]
  ...                     libpython: [ OFF ]
  ...                     libcrypto: [ OFF ]
  ...                     libunwind: [ OFF ]
  ...            libdw-dwarf-unwind: [ OFF ]
  ...                          zlib: [ OFF ]
  ...                          lzma: [ OFF ]
  ...                     get_cpuid: [ OFF ]
  ...                           bpf: [ OFF ]
  ...                        libaio: [ OFF ]
  ...                       libzstd: [ OFF ]
  ...        disassembler-four-args: [ OFF ]

  Makefile.config:414: *** No gnu/libc-version.h found, please install glibc-dev[el].  Stop.
  Makefile.perf:230: recipe for target 'sub-make' failed
  make[1]: *** [sub-make] Error 2
  Makefile:69: recipe for target 'all' failed
  make: *** [all] Error 2

With CC and CXX quoted, some of those features are now detected.

Fixes: e3232c2f ("tools build feature: Use CC and CXX from parent")
Signed-off-by: default avatarDaniel Díaz <daniel.diaz@linaro.org>
Reviewed-by: default avatarThomas Hebb <tommyhebb@gmail.com>
Cc: Alexei Starovoitov <ast@kernel.org>
Cc: Andrii Nakryiko <andriin@fb.com>
Cc: Daniel Borkmann <daniel@iogearbox.net>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: John Fastabend <john.fastabend@gmail.com>
Cc: KP Singh <kpsingh@chromium.org>
Cc: Martin KaFai Lau <kafai@fb.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Song Liu <songliubraving@fb.com>
Cc: Stephane Eranian <eranian@google.com>
Cc: Yonghong Song <yhs@fb.com>
Link: http://lore.kernel.org/lkml/20200812221518.2869003-1-daniel.diaz@linaro.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      fa5c8931
    • Jiri Olsa's avatar
      perf tools: Fix module symbol processing · b2fe96a3
      Jiri Olsa authored 
      The 'dso->kernel' condition is true also for kernel modules now,
and there are several places that were omited by the initial change:

  - we need to identify modules separately in dso__process_kernel_symbol
  - we need to set 'dso->kernel' for module from buildid table
  - there's no need to use 'dso->kernel || kmodule' in one condition

Committer testing:

Before:

  # perf test -v object
  <SNIP>
  Objdump command is: objdump -z -d --start-address=0xffffffff813e682f --stop-address=0xffffffff813e68af /usr/lib/debug/lib/modules/5.7.14-200.fc32.x86_64/vmlinux
  Bytes read match those read by objdump
  Reading object code for memory address: 0xffffffffc02dc257
  File is: /lib/modules/5.7.14-200.fc32.x86_64/kernel/arch/x86/crypto/crc32c-intel.ko.xz
  On file address is: 0xffffffffc02dc2e7
  dso__data_read_offset failed
  test child finished with -1
  ---- end ----
  Object code reading: FAILED!
  #

After:

  # perf test object
  26: Object code reading                                   : Ok
  # perf test object
  26: Object code reading                                   : Ok
  # perf test object
  26: Object code reading                                   : Ok
  # perf test object
  26: Object code reading                                   : Ok
  # perf test object
  26: Object code reading                                   : Ok
  #

Fixes: 02213cec ("perf maps: Mark module DSOs with kernel type")
Reported-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Tested-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
      b2fe96a3
    • Jiri Olsa's avatar
      perf tools: Rename 'enum dso_kernel_type' to 'enum dso_space_type' · 1c695c88
      Jiri Olsa authored 
      Rename enum dso_kernel_type to enum dso_space_type, which seems like
better fit.

Committer notes:

This is used with 'struct dso'->kernel, which once was a boolean, so
DSO_SPACE__USER is zero, !zero means some sort of kernel space, be it
the host kernel space or a guest kernel space.
Signed-off-by: default avatarJiri Olsa <jolsa@kernel.org>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      1c695c88
    • Rob Herring's avatar
      MAINTAINERS: Add missing tools/lib/perf/ path to perf maintainers · ceafdd66
      Rob Herring authored 
      Commit 3ce311af ("libperf: Move to tools/lib/perf") moved libperf
out of tools/perf/, but failed to update MAINTAINERS.
Signed-off-by: default avatarRob Herring <robh@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200807193225.3904108-1-robh@kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      ceafdd66
    • Rob Herring's avatar
      libperf: Fix man page typos · ce746d43
      Rob Herring authored 
      Fix various typos and inconsistent capitalization of CPU in the libperf
man pages.
Signed-off-by: default avatarRob Herring <robh@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/20200807193241.3904545-1-robh@kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      ce746d43
    • Michael Petlan's avatar
      perf test: Allow multiple probes in record+script_probe_vfs_getname.sh · 194cb6b5
      Michael Petlan authored 
      Sometimes when adding a kprobe by perf, it results in multiple probe
points, such as the following:

  # ./perf probe -l
    probe:vfs_getname    (on getname_flags:73@fs/namei.c with pathname)
    probe:vfs_getname_1  (on getname_flags:73@fs/namei.c with pathname)
    probe:vfs_getname_2  (on getname_flags:73@fs/namei.c with pathname)
  # cat /sys/kernel/debug/tracing/kprobe_events
  p:probe/vfs_getname _text+5501804 pathname=+0(+0(%gpr31)):string
  p:probe/vfs_getname_1 _text+5505388 pathname=+0(+0(%gpr31)):string
  p:probe/vfs_getname_2 _text+5508396 pathname=+0(+0(%gpr31)):string

In this test, we need to record all of them and expect any of them in
the perf-script output, since it's not clear which one will be used for
the desired syscall:

  # perf stat -e probe:vfs_getname\* -- touch /tmp/nic

   Performance counter stats for 'touch /tmp/nic':

                31      probe:vfs_getname_2
                 0      probe:vfs_getname_1
                 1      probe:vfs_getname
       0.001421826 seconds time elapsed

       0.001506000 seconds user
       0.000000000 seconds sys

If the test relies only on probe:vfs_getname, it might easily miss the
relevant data.
Signed-off-by: default avatarMichael Petlan <mpetlan@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
LPU-Reference: 20200722135845.29958-1-mpetlan@redhat.com
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      194cb6b5
    • Vincent Whitchurch's avatar
      perf bench mem: Always memset source before memcpy · 1beaef29
      Vincent Whitchurch authored 
      For memcpy, the source pages are memset to zero only when --cycles is
used.  This leads to wildly different results with or without --cycles,
since all sources pages are likely to be mapped to the same zero page
without explicit writes.

Before this fix:

$ export cmd="./perf stat -e LLC-loads -- ./perf bench \
  mem memcpy -s 1024MB -l 100 -f default"
$ $cmd

         2,935,826      LLC-loads
       3.821677452 seconds time elapsed

$ $cmd --cycles

       217,533,436      LLC-loads
       8.616725985 seconds time elapsed

After this fix:

$ $cmd

       214,459,686      LLC-loads
       8.674301124 seconds time elapsed

$ $cmd --cycles

       214,758,651      LLC-loads
       8.644480006 seconds time elapsed

Fixes: 47b5757b ("perf bench mem: Move boilerplate memory allocation to the infrastructure")
Signed-off-by: default avatarVincent Whitchurch <vincent.whitchurch@axis.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: kernel@axis.com
Link: http://lore.kernel.org/lkml/20200810133404.30829-1-vincent.whitchurch@axis.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      1beaef29
    • David Ahern's avatar
      perf sched: Prefer sched_waking event when it exists · d566a9c2
      David Ahern authored 
      Commit fbd705a0 ("sched: Introduce the 'trace_sched_waking'
tracepoint") added sched_waking tracepoint which should be preferred
over sched_wakeup when analyzing scheduling delays.

Update 'perf sched record' to collect sched_waking events if it exists
and fallback to sched_wakeup if it does not. Similarly, update timehist
command to skip sched_wakeup events if the session includes sched_waking
(ie., sched_waking is preferred over sched_wakeup).
Signed-off-by: default avatarDavid Ahern <dsahern@kernel.org>
Acked-by: default avatarNamhyung Kim <namhyung@kernel.org>
Cc: Jiri Olsa <jolsa@kernel.org>
Link: http://lore.kernel.org/lkml/20200807164844.44870-1-dsahern@kernel.orgSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      d566a9c2
  5. 12 Aug, 2020 8 commits
    • Colin Ian King's avatar
      perf bench: Fix a couple of spelling mistakes in options text · f9f95068
      Colin Ian King authored 
      There are a couple of spelling mistakes in the text. Fix these.
Signed-off-by: default avatarColin King <colin.king@canonical.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: kernel-janitors@vger.kernel.org
Link: http://lore.kernel.org/lkml/20200812064647.200132-1-colin.king@canonical.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      f9f95068
    • Alexander Gordeev's avatar
      perf bench numa: Fix benchmark names · 85372c69
      Alexander Gordeev authored 
      Standard benchmark names let users know the tests specifics.  For
example "2x1-bw-process" name tells that two processes one thread each
are run and the RAM bandwidth is measured.

Several benchmarks names do not correspond to their actual running
configuration. Fix that and also some whitespace and comment
inconsistencies.
Signed-off-by: default avatarAlexander Gordeev <agordeev@linux.ibm.com>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/6b6f2084f132ee8e9203dc7c32f9deb209b87a68.1597004831.git.agordeev@linux.ibm.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      85372c69
    • Alexander Gordeev's avatar
      perf bench numa: Fix number of processes in "2x3-convergence" test · 72d69c2a
      Alexander Gordeev authored 
      Signed-off-by: default avatarAlexander Gordeev <agordeev@linux.ibm.com>
Acked-by: default avatarNamhyung Kim <namhyung@kernel.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Mark Rutland <mark.rutland@arm.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Link: http://lore.kernel.org/lkml/d949f5f48e17fc816f3beecf8479f1b2480345e4.1597004831.git.agordeev@linux.ibm.comSigned-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      72d69c2a
    • Arnaldo Carvalho de Melo's avatar
      tools headers UAPI: Sync kvm.h headers with the kernel sources · 6016e034
      Arnaldo Carvalho de Melo authored 
      To pick the changes in:

  3edd6839 ("KVM: x86: Add a capability for GUEST_MAXPHYADDR < HOST_MAXPHYADDR support")
  1aa561b1 ("kvm: x86: Add "last CPU" to some KVM_EXIT information")
  23a60f83 ("s390/kvm: diagnose 0x318 sync and reset")

That do not result in any change in tooling, as the additions are not
being used in any table generator.

This silences these perf build warning:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/kvm.h' differs from latest version at 'include/uapi/linux/kvm.h'
  diff -u tools/include/uapi/linux/kvm.h include/uapi/linux/kvm.h

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Collin Walling <walling@linux.ibm.com>
Cc: Jim Mattson <jmattson@google.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Mohammed Gamal <mgamal@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      6016e034
    • Arnaldo Carvalho de Melo's avatar
      tools include UAPI: Sync linux/vhost.h with the kernel sources · fe452fb8
      Arnaldo Carvalho de Melo authored 
      To get the changes in:

  25abc060 ("vhost-vdpa: support IOTLB batching hints")

This doesn't result in any changes in tooling, no new ioctls to be
picked up by the id->string table generators, etc.

Silencing this perf build warning:

  Warning: Kernel ABI header at 'tools/include/uapi/linux/vhost.h' differs from latest version at 'include/uapi/linux/vhost.h'
  diff -u tools/include/uapi/linux/vhost.h include/uapi/linux/vhost.h

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jason Wang <jasowang@redhat.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Michael S. Tsirkin <mst@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      fe452fb8
    • Arnaldo Carvalho de Melo's avatar
      tools headers kvm s390: Sync headers with the kernel sources · 23db762b
      Arnaldo Carvalho de Melo authored 
      To pick the changes in:

  23a60f83 ("s390/kvm: diagnose 0x318 sync and reset")

None of them trigger any changes in tooling, this time this is just to silence
these perf build warnings:

  Warning: Kernel ABI header at 'tools/arch/s390/include/uapi/asm/kvm.h' differs from latest version at 'arch/s390/include/uapi/asm/kvm.h'
  diff -u tools/arch/s390/include/uapi/asm/kvm.h arch/s390/include/uapi/asm/kvm.h

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Collin Walling <walling@linux.ibm.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      23db762b
    • Arnaldo Carvalho de Melo's avatar
      perf trace beauty: Use the autogenerated protocol family table · f3cf7fa9
      Arnaldo Carvalho de Melo authored 
      That helps us not to lose new protocol families when they are
introduced, replacing that hardcoded, dated family->string table.

To recap what this allows us to do:

  # perf trace -e syscalls:sys_enter_socket/max-stack=10/ --filter=family==INET --max-events=1
     0.000 fetchmail/41097 syscalls:sys_enter_socket(family: INET, type: DGRAM|CLOEXEC|NONBLOCK, protocol: IP)
                                       __GI___socket (inlined)
                                       reopen (/usr/lib64/libresolv-2.31.so)
                                       send_dg (/usr/lib64/libresolv-2.31.so)
                                       __res_context_send (/usr/lib64/libresolv-2.31.so)
                                       __GI___res_context_query (inlined)
                                       __GI___res_context_search (inlined)
                                       _nss_dns_gethostbyname4_r (/usr/lib64/libnss_dns-2.31.so)
                                       gaih_inet.constprop.0 (/usr/lib64/libc-2.31.so)
                                       __GI_getaddrinfo (inlined)
                                       [0x15cb2] (/usr/bin/fetchmail)
  #

More work is still needed to allow for the more natura strace-like
syscall name usage instead of the trace event name:

  # perf trace -e socket/max-stack=10,family==INET/ --max-events=1

I.e. to allow for modifiers to follow the syscall name and for logical
expressions to be accepted as filters to use with that syscall, be it as
trace event filters or BPF based ones.

Using -v we can see how the trace event filter is built:

  # perf trace -v -e syscalls:sys_enter_socket/call-graph=dwarf/ --filter=family==INET --max-events=2
  <SNIP>
  New filter for syscalls:sys_enter_socket: (family==0x2) && (common_pid != 41384 && common_pid != 2836)
  <SNIP>

  $ tools/perf/trace/beauty/socket.sh | grep -w 2
	[2] = "INET",
  $

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      f3cf7fa9
    • Arnaldo Carvalho de Melo's avatar
      perf trace beauty: Add script to autogenerate socket families table · 58277f50
      Arnaldo Carvalho de Melo authored 
      To use with 'perf trace', to convert the protocol families to strings,
e.g:

  $ tools/perf/trace/beauty/socket.sh
  static const char *socket_families[] = {
  	[0] = "UNSPEC",
  	[1] = "LOCAL",
  	[2] = "INET",
  	[3] = "AX25",
  	[4] = "IPX",
  	[5] = "APPLETALK",
  	[6] = "NETROM",
  	[7] = "BRIDGE",
  	[8] = "ATMPVC",
  	[9] = "X25",
  	[10] = "INET6",
  	[11] = "ROSE",
  	[12] = "DECnet",
  	[13] = "NETBEUI",
  	[14] = "SECURITY",
  	[15] = "KEY",
  	[16] = "NETLINK",
  	[17] = "PACKET",
  	[18] = "ASH",
  	[19] = "ECONET",
  	[20] = "ATMSVC",
  	[21] = "RDS",
  	[22] = "SNA",
  	[23] = "IRDA",
  	[24] = "PPPOX",
  	[25] = "WANPIPE",
  	[26] = "LLC",
  	[27] = "IB",
  	[28] = "MPLS",
  	[29] = "CAN",
  	[30] = "TIPC",
  	[31] = "BLUETOOTH",
  	[32] = "IUCV",
  	[33] = "RXRPC",
  	[34] = "ISDN",
  	[35] = "PHONET",
  	[36] = "IEEE802154",
  	[37] = "CAIF",
  	[38] = "ALG",
  	[39] = "NFC",
  	[40] = "VSOCK",
  	[41] = "KCM",
  	[42] = "QIPCRTR",
  	[43] = "SMC",
  	[44] = "XDP",
  };
  $

This uses a copy of include/linux/socket.h that is kept in a directory
to be used just for these table generation scripts and for checking if
the kernel has a new file that maybe gets something new for these
tables.

This allows us to:

- Avoid accessing files outside tools/, in the kernel sources, that may
  be changed in unexpected ways and thus break these scripts.

- Notice when those files change and thus check if the changes don't
  break those scripts, update them to automatically get the new
  definitions, a new socket family, for instance.

- Not add then to the tools/include/ where it may end up used while
  building the tools and end up requiring dragging yet more stuff from
  the kernel or plain break the build in some of the myriad environments
  where perf may be built.

This will replace the previous static array in tools/perf/ that was
dated and was already missing the AF_KCM, AF_QIPCRTR, AF_SMC and AF_XDP
families.

The next cset will wire this up to the perf build process.

At some point this must be made into a library to be used in places such
as libtraceevent, bpftrace, etc.

Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      58277f50
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