linux-toradex.git/tools/perf/Build, branch v5.9-rc5

perf tools: Rename build libperf to perf

2019-02-14T18:18:08+00:00

Rename build libperf to perf, because it's used to build perf.

The libperf build object name will be used for libperf library.

Signed-off-by: Jiri Olsa 
Cc: Alexander Shishkin 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20190213123246.4015-4-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf trace: Remove audit-libs dependency if syscall tables are present

2018-01-23T12:51:38+00:00

Change the Makefile and build process to no longer require audit-libs
interfaces when the architecture provides system call tables.

Committer notes:

Its not enough to hook into the NO_LIBAUDIT makefile block, we need to
define a CONFIG_TRACE that gets selected by both architectures
generating the syscall tables from the kernel headers and from detecting
the availability of libaudit.

With that in place we will not link against libaudit even if the
necessary files are available for that, in fact we will not even try to
detect its availability, speeding up a bit the feature detection phase.

Signed-off-by: Hendrik Brueckner 
Reviewed-by: Thomas Richter 
Tested-by: Arnaldo Carvalho de Melo 
Cc: Jiri Olsa 
Cc: Michael Petlan 
Cc: linux-s390@vger.kernel.org
LPU-Reference: 1516352177-11106-6-git-send-email-brueckner@linux.vnet.ibm.com
Link: https://lkml.kernel.org/n/tip-j68lub6ipm8apvy52vd3l4cm@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf trace: Only build tools/perf/trace/beauty/ when building 'perf trace'

2017-07-19T02:13:52+00:00

As it calls functions in builtin-trace.c.

Cc: Adrian Hunter 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Wang Nan 
Link: http://lkml.kernel.org/n/tip-bt3lhw1rvy3jzbsp2fvvegb0@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf trace: Beautify statx syscall 'flag' and 'mask' arguments

2017-03-31T17:42:31+00:00

To test it, build samples/statx/test_statx, which I did as:

  $ make headers_install
  $ cc -I ~/git/linux/usr/include samples/statx/test-statx.c -o /tmp/statx

And then use perf trace on it:

  # perf trace -e statx /tmp/statx /etc/passwd
  statx(/etc/passwd) = 0
  results=7ff
    Size: 3496            Blocks: 8          IO Block: 4096    regular file
  Device: fd:00           Inode: 280156      Links: 1
  Access: (0644/-rw-r--r--)  Uid:     0   Gid:     0
  Access: 2017-03-29 16:01:01.650073438-0300
  Modify: 2017-03-10 16:25:14.156479354-0300
  Change: 2017-03-10 16:25:14.171479328-0300
     0.000 ( 0.007 ms): statx/30648 statx(dfd: CWD, filename: 0x7ef503f4, flags: SYMLINK_NOFOLLOW, mask: TYPE|MODE|NLINK|UID|GID|ATIME|MTIME|CTIME|INO|SIZE|BLOCKS|BTIME, buffer: 0x7fff7ef4eb10) = 0
  #

Using the test-stat.c options to change the mask:

  # perf trace -e statx /tmp/statx -O /etc/passwd > /dev/null
     0.000 ( 0.008 ms): statx/30745 statx(dfd: CWD, filename: 0x3a0753f4, flags: SYMLINK_NOFOLLOW, mask: BTIME, buffer: 0x7ffd3a0735c0) = 0
  #
  # perf trace -e statx /tmp/statx -A /etc/passwd > /dev/null
     0.000 ( 0.010 ms): statx/30757 statx(dfd: CWD, filename: 0xa94e63f4, flags: SYMLINK_NOFOLLOW|NO_AUTOMOUNT, mask: TYPE|MODE|NLINK|UID|GID|ATIME|MTIME|CTIME|INO|SIZE|BLOCKS|BTIME, buffer: 0x7ffea94e49d0) = 0
  #
  # trace --no-inherit -e statx /tmp/statx -F /etc/passwd > /dev/null
     0.000 ( 0.011 ms): statx(dfd: CWD, filename: 0x3b02d3f3, flags: SYMLINK_NOFOLLOW|STATX_FORCE_SYNC, mask: TYPE|MODE|NLINK|UID|GID|ATIME|MTIME|CTIME|INO|SIZE|BLOCKS|BTIME, buffer: 0x7ffd3b02c850) = 0
  #
  # trace --no-inherit -e statx /tmp/statx -F -L /etc/passwd > /dev/null
     0.000 ( 0.008 ms): statx(dfd: CWD, filename: 0x15cff3f3, flags: STATX_FORCE_SYNC, mask: TYPE|MODE|NLINK|UID|GID|ATIME|MTIME|CTIME|INO|SIZE|BLOCKS|BTIME, buffer: 0x7fff15cfdda0) = 0
  #
  # trace --no-inherit -e statx /tmp/statx -D -O /etc/passwd > /dev/null
     0.000 ( 0.009 ms): statx(dfd: CWD, filename: 0xfa37f3f3, flags: SYMLINK_NOFOLLOW|STATX_DONT_SYNC, mask: BTIME, buffer: 0x7ffffa37da20) = 0
  #

Adding a probe to get the filename collected as well:

  # perf probe 'vfs_getname=getname_flags:72 pathname=result->name:string'
  Added new event:
    probe:vfs_getname    (on getname_flags:72 with pathname=result->name:string)

  You can now use it in all perf tools, such as:

	  perf record -e probe:vfs_getname -aR sleep 1

  # trace --no-inherit -e statx /tmp/statx -D -O /etc/passwd > /dev/null
     0.169 ( 0.007 ms): statx(dfd: CWD, filename: /etc/passwd, flags: SYMLINK_NOFOLLOW|STATX_DONT_SYNC, mask: BTIME, buffer: 0x7ffda9bf50f0) = 0
  #

Same technique could be used to collect and beautify the result put in
the 'buffer' argument.

Finally do a system wide 'perf trace' session looking for any use of statx,
then run the test proggie with various flags:

  # trace -e statx
   16612.967 ( 0.028 ms): statx/4562 statx(dfd: CWD, filename: /tmp/statx, flags: SYMLINK_NOFOLLOW, mask: TYPE|MODE|NLINK|UID|GID|ATIME|MTIME|CTIME|INO|SIZE|BLOCKS|BTIME, buffer: 0x7ffef195d660) = 0
   33064.447 ( 0.011 ms): statx/4569 statx(dfd: CWD, filename: /tmp/statx, flags: SYMLINK_NOFOLLOW|STATX_FORCE_SYNC, mask: TYPE|MODE|NLINK|UID|GID|ATIME|MTIME|CTIME|INO|SIZE|BLOCKS|BTIME, buffer: 0x7ffc5484c790) = 0
   36050.891 ( 0.023 ms): statx/4576 statx(dfd: CWD, filename: /tmp/statx, flags: SYMLINK_NOFOLLOW, mask: BTIME, buffer: 0x7ffeb18b66e0) = 0
   38039.889 ( 0.023 ms): statx/4584 statx(dfd: CWD, filename: /tmp/statx, flags: SYMLINK_NOFOLLOW, mask: TYPE|MODE|NLINK|UID|GID|ATIME|MTIME|CTIME|INO|SIZE|BLOCKS|BTIME, buffer: 0x7fff1db0ea90) = 0
  ^C#

This one also starts moving the beautifiers from files directly included
in builtin-trace.c to separate objects + a beauty.h header with
prototypes, so that we can add test cases in tools/perf/tests/ to fire
syscalls with various arguments and then get them intercepted as
syscalls:sys_enter_foo or raw_syscalls:sys_enter + sys_exit to then
format and check that the formatted output is the one we expect.

Cc: Adrian Hunter 
Cc: Al Viro 
Cc: David Ahern 
Cc: David Howells 
Cc: Jiri Olsa 
Cc: Namhyung Kim 
Cc: Wang Nan 
Link: http://lkml.kernel.org/n/tip-xvzw8eynffvez5czyzidhrno@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf ftrace: Introduce new 'ftrace' tool

2017-01-26T14:43:01+00:00

The 'perf ftrace' command is a simple wrapper of kernel's ftrace
functionality.  It only supports single thread tracing currently and
just reads trace_pipe in text and then write it to stdout.

Committer notes:

Testing it:

  # perf ftrace -f function_graph usleep 123456
  
  2)               |  SyS_nanosleep() {
  2)               |    _copy_from_user() {
  
  2)   0.900 us    |      }
  2)   1.354 us    |    }
  2)               |    hrtimer_nanosleep() {
  2)   0.062 us    |      __hrtimer_init();
  2)               |      do_nanosleep() {
  2)               |        hrtimer_start_range_ns() {
  
  2)   5.025 us    |        }
  2)               |        schedule() {
  2)   0.125 us    |          rcu_note_context_switch();
  2)   0.057 us    |          _raw_spin_lock();
  2)               |          deactivate_task() {
  2)   0.369 us    |            update_rq_clock.part.77();
  2)               |            dequeue_task_fair() {
  
  2) + 22.453 us   |            }
  2) + 23.736 us   |          }
  2)               |          pick_next_task_fair() {
  
  2) + 47.167 us   |          }
  2)               |          pick_next_task_idle() {
  
  2)   4.462 us    |          }
  ------------------------------------------
  2)  usleep-20387  =>    -0
  ------------------------------------------

  2)   0.806 us    |  switch_mm_irqs_off();
  ------------------------------------------
  2)    -0    =>  usleep-20387
  ------------------------------------------

  2)   0.151 us    |          finish_task_switch();
  2) @ 123597.2 us |        }
  2)   0.037 us    |        _cond_resched();
  2)               |        hrtimer_try_to_cancel() {
  2)   0.064 us    |          hrtimer_active();
  2)   0.353 us    |        }
  2) @ 123605.3 us |      }
  2) @ 123606.2 us |    }
  2) @ 123608.3 us |  } /* SyS_nanosleep */
  2)               |  __do_page_fault() {
 

Signed-off-by: Namhyung Kim 
Tested-by: Arnaldo Carvalho de Melo 
Tested-by: Masami Hiramatsu 
Cc: Frederic Weisbecker 
Cc: Jeremy Eder 
Cc: Jiri Olsa ,
Cc: Paul Mackerras 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Cc: Steven Rostedt 
Link: http://lkml.kernel.org/n/tip-r1hgmsj4dxny8arn3o9mw512@git.kernel.org
[ Various foward port fixes, add man page ]
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Move two variables usied in libperf from perf.c

2017-01-17T14:36:45+00:00

The use_browser and perf_version_string variables are both declared in
perf.c but they are also referenced by other functions of libperf.a.

Therefore a user linking an own main() with libperf.a must declare those
two variables in their files even if the files never use the browser or
the version information.

This patch fixes this issue by moving use_browser and
perf_version_string out of perf.c to some other files.

Signed-off-by: Soramichi Akiyama 
Cc: Alexander Shishkin 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/20170117002237.c1aec0ce3b4d675dca018deb@m.soramichi.jp
Signed-off-by: Arnaldo Carvalho de Melo

perf kallsyms: Introduce tool to look for extended symbol information on the running kernel

2017-01-11T19:48:01+00:00

Its similar to doing grep on a /proc/kallsyms, but it also shows extra
information like the path to the kernel module and the unrelocated
addresses in it, to help in diagnosing problems.

It is also helps demonstrate the use of the symbols routines so that
tool writers can use them more effectively.

Using it:

  $ perf kallsyms e1000_xmit_frame netif_rx usb_stor_set_xfer_buf
  e1000_xmit_frame: [e1000e] /lib/modules/4.9.0+/kernel/drivers/net/ethernet/intel/e1000e/e1000e.ko 0xffffffffc046fc10-0xffffffffc0470bb0 (0x19c80-0x1ac20)
  netif_rx: [kernel] [kernel.kallsyms] 0xffffffff916f03a0-0xffffffff916f0410 (0xffffffff916f03a0-0xffffffff916f0410)
  usb_stor_set_xfer_buf: [usb_storage] /lib/modules/4.9.0+/kernel/drivers/usb/storage/usb-storage.ko 0xffffffffc057aea0-0xffffffffc057af19 (0xf10-0xf89)
  $

Cc: Adrian Hunter 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Masami Hiramatsu 
Cc: Namhyung Kim 
Cc: Wang Nan 
Link: http://lkml.kernel.org/n/tip-79bk9pakujn4l4vq0f90klv3@git.kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf c2c: Add c2c command

2016-10-19T16:18:31+00:00

Adding c2c command base wirings. Its implementation is going to be added
gradually in following patches.

Signed-off-by: Jiri Olsa 
Cc: Andi Kleen 
Cc: David Ahern 
Cc: Don Zickus 
Cc: Joe Mario 
Cc: Namhyung Kim 
Cc: Peter Zijlstra 
Link: http://lkml.kernel.org/r/1474558645-19956-11-git-send-email-jolsa@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf tools: Set and pass DOCDIR to builtin-report.c

2016-01-12T15:42:07+00:00

It'll be used to locate perf document directory to find tips.txt in case
it's not installed on the system.

Signed-off-by: Namhyung Kim 
Cc: Andi Kleen 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Peter Zijlstra 
Cc: Wang Nan 
Link: http://lkml.kernel.org/r/1452334589-8782-3-git-send-email-namhyung@kernel.org
Signed-off-by: Arnaldo Carvalho de Melo

perf report: Show random usage tip on the help line

2016-01-08T16:15:46+00:00

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 )
  #

Signed-off-by: Namhyung Kim 
Acked-by: Ingo Molnar 
Cc: Andi Kleen 
Cc: David Ahern 
Cc: Jiri Olsa 
Cc: Masami Hiramatsu 
Cc: Peter Zijlstra 
Cc: Stephane Eranian 
Cc: Wang Nan 
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: Arnaldo Carvalho de Melo