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perf/core improvements and fixes:

Browse source 
User visible:
 
 - Make 'perf record' collect CPU cache info in the perf.data file header:
 
   $ perf record usleep 1
   [ perf record: Woken up 1 times to write data ]
   [ perf record: Captured and wrote 0.017 MB perf.data (7 samples) ]
   $ perf report --header-only -I | tail -10 | head -8
   # CPU cache info:
   #  L1 Data                 32K [0-1]
   #  L1 Instruction          32K [0-1]
   #  L1 Data                 32K [2-3]
   #  L1 Instruction          32K [2-3]
   #  L2 Unified             256K [0-1]
   #  L2 Unified             256K [2-3]
   #  L3 Unified            4096K [0-3]
   $
 
   Will be used in 'perf c2c' and eventually in 'perf diff' to allow, for instance
   running the same workload in multiple machines and then when using 'diff' show
   the hardware difference. (Jiri Olsa)
 
 - 'perf stat' now shows shadow metrics (insn per cycle, etc) in
   interval mode too. E.g:
 
     # perf stat -I 1000 -e instructions,cycles sleep 1
     #         time   counts unit events
        1.000215928  519,620      instructions     #  0.69 insn per cycle
        1.000215928  752,003      cycles
     <SNIP>
 
 Infrastructure:
 
 - libapi now can also use pr_{warning,info,debug}() and that can be
   set by tools using it (Jiri Olsa)
 
 - libapi adopts filename__read_str() from perf, adds sysfs__read_str() (Jiri Olsa)
 
 - Add check for java alternatives cmd in jvmti Makefile, so that it manages
   to automatically find the right path for the JDK devel files in Ubuntu like
   systems in addition to Fedora like ones (Stephane Eranian)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-core-for-mingo' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

User visible changes:

 - Make 'perf record' collect CPU cache info in the perf.data file header:

  $ perf record usleep 1
  [ perf record: Woken up 1 times to write data ]
  [ perf record: Captured and wrote 0.017 MB perf.data (7 samples) ]
  $ perf report --header-only -I | tail -10 | head -8
  # CPU cache info:
  #  L1 Data                 32K [0-1]
  #  L1 Instruction          32K [0-1]
  #  L1 Data                 32K [2-3]
  #  L1 Instruction          32K [2-3]
  #  L2 Unified             256K [0-1]
  #  L2 Unified             256K [2-3]
  #  L3 Unified            4096K [0-3]
  $

  Will be used in 'perf c2c' and eventually in 'perf diff' to allow, for instance
  running the same workload in multiple machines and then when using 'diff' show
  the hardware difference. (Jiri Olsa)

 - 'perf stat' now shows shadow metrics (insn per cycle, etc) in
   interval mode too. E.g:

    # perf stat -I 1000 -e instructions,cycles sleep 1
    #         time   counts unit events
       1.000215928  519,620      instructions     #  0.69 insn per cycle
       1.000215928  752,003      cycles
    <SNIP>

Infrastructure changes:

 - libapi now can also use pr_{warning,info,debug}() and that can be
   set by tools using it (Jiri Olsa)

 - libapi adopts filename__read_str() from perf, adds sysfs__read_str() (Jiri Olsa)

 - Add check for java alternatives cmd in jvmti Makefile, so that it manages
   to automatically find the right path for the JDK devel files in Ubuntu like
   systems in addition to Fedora like ones (Stephane Eranian)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Ingo Molnar 2016-02-17 08:36:41 +01:00
commit 7104f194e5
21 changed files with 694 additions and 255 deletions
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