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Arnaldo Carvalho de Melo 9e9d0a79d3 perf test shell lbr: Support hybrid x86 systems too 
Running on a:

  root@x1:~# grep 'model name' -m1 /proc/cpuinfo
  model name	: 13th Gen Intel(R) Core(TM) i7-1365U
  root@x1:~#

It skips all the tests with:

  root@x1:~# perf test -vvvv LBR
   97: perf record LBR tests:
  --- start ---
  test child forked, pid 2033388
  Skip: only x86 CPUs support LBR
  ---- end(-2) ----
   97: perf record LBR tests                                           : Skip
  root@x1:~#

Because the test checks for the /sys/devices/cpu/caps/branches file,
that isn't present as we have instead:

  root@x1:~# ls -la /sys/devices/cpu*/caps/branches
  -r--r--r--. 1 root root 4096 Aug  8 11:22 /sys/devices/cpu_atom/caps/branches
  -r--r--r--. 1 root root 4096 Aug  8 11:21 /sys/devices/cpu_core/caps/branches
  root@x1:~#

If we check as well for one of those,
/sys/devices/cpu_core/caps/branches, then we don't skip the tests and
all are run on these x86 Intel Hybrid systems as well, passing all of
them:

  root@x1:~# perf test -vvvv LBR
   97: perf record LBR tests:
  --- start ---
  test child forked, pid 2034956
  LBR callgraph
  [ perf record: Woken up 5 times to write data ]
  [ perf record: Captured and wrote 1.812 MB /tmp/__perf_test.perf.data.B2HvQ (8114 samples) ]
  LBR callgraph [Success]
  LBR any branch test
  [ perf record: Woken up 25 times to write data ]
  [ perf record: Captured and wrote 6.382 MB /tmp/__perf_test.perf.data.B2HvQ (8071 samples) ]
  LBR any branch test: 8071 samples
  LBR any branch test [Success]
  LBR any call test
  [ perf record: Woken up 23 times to write data ]
  [ perf record: Captured and wrote 6.208 MB /tmp/__perf_test.perf.data.B2HvQ (8092 samples) ]
  LBR any call test: 8092 samples
  LBR any call test [Success]
  LBR any ret test
  [ perf record: Woken up 24 times to write data ]
  [ perf record: Captured and wrote 6.396 MB /tmp/__perf_test.perf.data.B2HvQ (8093 samples) ]
  LBR any ret test: 8093 samples
  LBR any ret test [Success]
  LBR any indirect call test
  [ perf record: Woken up 25 times to write data ]
  [ perf record: Captured and wrote 6.344 MB /tmp/__perf_test.perf.data.B2HvQ (8067 samples) ]
  LBR any indirect call test: 8067 samples
  LBR any indirect call test [Success]
  LBR any indirect jump test
  [ perf record: Woken up 12 times to write data ]
  [ perf record: Captured and wrote 3.073 MB /tmp/__perf_test.perf.data.B2HvQ (8061 samples) ]
  LBR any indirect jump test: 8061 samples
  LBR any indirect jump test [Success]
  LBR direct calls test
  [ perf record: Woken up 25 times to write data ]
  [ perf record: Captured and wrote 6.380 MB /tmp/__perf_test.perf.data.B2HvQ (8076 samples) ]
  LBR direct calls test: 8076 samples
  LBR direct calls test [Success]
  LBR any indirect user call test
  [ perf record: Woken up 5 times to write data ]
  [ perf record: Captured and wrote 1.597 MB /tmp/__perf_test.perf.data.B2HvQ (8079 samples) ]
  LBR any indirect user call test: 8079 samples
  LBR any indirect user call test [Success]
  LBR system wide any branch test
  [ perf record: Woken up 26 times to write data ]
  [ perf record: Captured and wrote 9.088 MB /tmp/__perf_test.perf.data.B2HvQ (9209 samples) ]
  LBR system wide any branch test: 9209 samples
  LBR system wide any branch test [Success]
  LBR system wide any call test
  [ perf record: Woken up 25 times to write data ]
  [ perf record: Captured and wrote 8.945 MB /tmp/__perf_test.perf.data.B2HvQ (9333 samples) ]
  LBR system wide any call test: 9333 samples
  LBR system wide any call test [Success]
  LBR parallel any branch test
  LBR parallel any call test
  LBR parallel any ret test
  LBR parallel any indirect call test
  LBR parallel any indirect jump test
  LBR parallel direct calls test
  LBR parallel system wide any branch test
  LBR parallel any indirect user call test
  LBR parallel system wide any call test
  [ perf record: Woken up 9 times to write data ]
  [ perf record: Woken up 51 times to write data ]
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Woken up 5 times to write data ]
  [ perf record: Woken up 559 times to write data ]
  [ perf record: Woken up 14 times to write data ]
  [ perf record: Woken up 17 times to write data ]
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Woken up 11 times to write data ]
  [ perf record: Captured and wrote 0.150 MB /tmp/__perf_test.perf.data.lANpR (1909 samples) ]
  [ perf record: Captured and wrote 2.371 MB /tmp/__perf_test.perf.data.Olum8 (3033 samples) ]
  [ perf record: Captured and wrote 1.230 MB /tmp/__perf_test.perf.data.njfJ8 (1742 samples) ]
  [ perf record: Captured and wrote 5.554 MB /tmp/__perf_test.perf.data.4ZTrj (29662 samples) ]
  [ perf record: Captured and wrote 19.906 MB /tmp/__perf_test.perf.data.dlGQt (29576 samples) ]
  [ perf record: Captured and wrote 0.289 MB /tmp/__perf_test.perf.data.CAT7y (4311 samples) ]
  [ perf record: Captured and wrote 3.129 MB /tmp/__perf_test.perf.data.diuKG (3971 samples) ]
  LBR parallel any indirect user call test: 1909 samples
  [ perf record: Captured and wrote 4.858 MB /tmp/__perf_test.perf.data.sVjtN (6130 samples) ]
  LBR parallel any indirect user call test [Success]
  [ perf record: Captured and wrote 3.669 MB /tmp/__perf_test.perf.data.AJtNI (4827 samples) ]
  LBR parallel any indirect jump test: 4311 samples
  LBR parallel any indirect jump test [Success]
  LBR parallel direct calls test: 3033 samples
  LBR parallel direct calls test [Success]
  LBR parallel any indirect call test: 1742 samples
  LBR parallel any indirect call test [Success]
  LBR parallel any call test: 4827 samples
  LBR parallel any call test [Success]
  LBR parallel any branch test: 6130 samples
  LBR parallel any branch test [Success]
  LBR parallel system wide any branch test: 29662 samples
  LBR parallel any ret test: 3971 samples
  LBR parallel any ret test [Success]
  LBR parallel system wide any branch test [Success]
  LBR parallel system wide any call test: 29576 samples
  LBR parallel system wide any call test [Success]
  ---- end(0) ----
   97: perf record LBR tests                                           : Ok
  root@x1:~#

Reviewed-by: Kan Liang <kan.liang@linux.intel.com>
Acked-by: Ian Rogers <irogers@google.com>
Cc: Adrian Hunter <adrian.hunter@intel.com>
Cc: Jiri Olsa <jolsa@kernel.org>
Cc: Namhyung Kim <namhyung@kernel.org>
Link: https://lore.kernel.org/lkml/ZrTXftup0H46R8WK@x1
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
2024-08-08 17:30:39 -03:00
arch X86 fixes: 2024-08-04 08:57:08 -07:00
block block: fix deadlock between sd_remove & sd_release 2024-07-24 09:51:21 -06:00
certs kbuild: use $(src) instead of $(srctree)/$(src) for source directory 2024-05-10 04:34:52 +09:00
crypto crypto: testmgr - generate power-of-2 lengths more often 2024-07-13 11:50:28 +12:00
Documentation platform-drivers-x86 for v6.11-2 2024-08-06 07:52:10 -07:00
drivers platform-drivers-x86 for v6.11-2 2024-08-06 07:52:10 -07:00
fs 'smb3 client fixes 2024-08-04 08:18:40 -07:00
include profiling: remove profile=sleep support 2024-08-04 13:36:28 -07:00
init rust: SHADOW_CALL_STACK is incompatible with Rust 2024-08-01 16:15:03 +01:00
io_uring io_uring: remove unused local list heads in NAPI functions 2024-07-30 06:20:20 -06:00
ipc sysctl: treewide: constify the ctl_table argument of proc_handlers 2024-07-24 20:59:29 +02:00
kernel profiling: remove profile=sleep support 2024-08-04 13:36:28 -07:00
lib minmax: don't use max() in situations that want a C constant expression 2024-07-28 20:23:27 -07:00
LICENSES LICENSES: Add the copyleft-next-0.3.1 license 2022-11-08 15:44:01 +01:00
mm slab fixes for 6.11-rc2 2024-08-05 09:23:00 -07:00
net Including fixes from wireless, bleutooth, BPF and netfilter. 2024-08-01 09:42:09 -07:00
rust Rust changes for v6.11 2024-07-27 13:44:54 -07:00
samples Driver core changes for 6.11-rc1 2024-07-25 10:42:22 -07:00
scripts syscalls: fix syscall macros for newfstat/newfstatat 2024-08-02 15:20:47 +02:00
security apparmor-pr-2024-07-24 PR 2024-07-25 2024-07-27 13:28:39 -07:00
sound sound fixes for 6.11-rc2 2024-08-02 09:04:57 -07:00
tools perf test shell lbr: Support hybrid x86 systems too 2024-08-08 17:30:39 -03:00
usr initramfs: shorten cmd_initfs in usr/Makefile 2024-07-16 01:07:52 +09:00
virt KVM: guest_memfd: abstract how prepared folios are recorded 2024-07-26 14:46:15 -04:00
.clang-format Docs: Move clang-format from process/ to dev-tools/ 2024-06-26 16:36:00 -06:00
.cocciconfig
.editorconfig .editorconfig: remove trim_trailing_whitespace option 2024-06-13 16:47:52 +02:00
.get_maintainer.ignore Add Jeff Kirsher to .get_maintainer.ignore 2024-03-08 11:36:54 +00:00
.gitattributes .gitattributes: set diff driver for Rust source code files 2023-05-31 17:48:25 +02:00
.gitignore kbuild: add script and target to generate pacman package 2024-07-22 01:24:22 +09:00
.mailmap MAINTAINERS: mailmap: update James Clark's email address 2024-07-26 14:32:35 -07:00
.rustfmt.toml rust: add .rustfmt.toml 2022-09-28 09:02:20 +02:00
COPYING
CREDITS tracing: Update of MAINTAINERS and CREDITS file 2024-07-18 14:08:42 -07:00
Kbuild Kbuild updates for v6.1 2022-10-10 12:00:45 -07:00
Kconfig kbuild: ensure full rebuild when the compiler is updated 2020-05-12 13:28:33 +09:00
MAINTAINERS Including fixes from wireless, bleutooth, BPF and netfilter. 2024-08-01 09:42:09 -07:00
Makefile Linux 6.11-rc2 2024-08-04 13:50:53 -07:00
README README: Fix spelling 2024-03-18 03:36:32 -06:00

README 

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the reStructuredText markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.