kernel/linux
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/ synced 2026-11-13 07:31:07 +00:00
Code Issues Releases Packages Activity

perf/core improvements and fixes:

Browse source 
New features:
 
 - Introduce PERF_RECORD_SWITCH(_CPU_WIDE) and use it in 'record' to
   ask for context switches, allowing non priviledged tasks to know
   when they are switched in and out, which wasn't possible with
   the other context switch tracepoint and software events, see the
   patch description for a comprehensive justification (Adrian Hunter)
 
 - Stop collecting /proc/kallsyms in perf.data files, saving about
   4.5MB on a typical x86-64 system, use the the symbol resolution
   routines used in all the other tools (report, top, etc) now that
   we can ask libtraceevent to use perf's symbol resolution code.
   (Arnaldo Carvalho de Melo)
 
 User visible fixes:
 
 - Expose perf's symbol resolver to libtraceecent, so that its plugins can
   resolve tracepoint fields to kernel functions, like the 'function' field
   in the "timer:hrtimer_start tracepoint" (Arnaldo Carvalho de Melo)
 
 Infrastructure:
 
 - Map propagation of thread and cpu maps improvements, prep work for
   'perf stat' new features (Jiri Olsa)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
 -----BEGIN PGP SIGNATURE-----
 Version: GnuPG v1
 
 iQIcBAABAgAGBQJVsZsBAAoJENZQFvNTUqpA1UgP/RgFnXgL3cgUPsMMVL040/UV
 3fAVWJdjbXoNZHDPrUd7rphnvQYG4wEqcWB7akaIiaebOjmlKGJZZTNafK0WpbBT
 xAL2h2FqXte0SIQUb5VlVwGeP4mUOMVkSs1gFEPd24WF+2bsVxLhE2pCOa18yB1J
 4d/sP/haAsaxmNG7P6I53WWWn45UPuxgU66cBTIXIdYGUVg65i/p8orbaZxc3Vvg
 nIQA5VWuUoxo+TN83oCRlt5JNOl5GadHdjDdrqVGvh40IIZ+2W3ViGQAAxrJdvHv
 0032YrEZiU4xS0heMh5Gvh+Df1dmRfpKJrpdrqSzBNbVESNPE7iCDPgI/8xn5Rif
 OK7IQtjfHz5DZLSQ8AkNOq619aVmL4FLJeiVK8TahxvGIW/+itlAmn6EbzRXRDZr
 qM+zmijvzwWqGsP1JJaRSkKDbF87Nk360AQ5M7aYtMRtWDA7G29Ms6m1IJa207YZ
 jEY1tjMTiPiGOO4cgb6V/nDulcgRgko60bivsDAUxM8SvxGuW3/79Y8l5LxifuVR
 sxgY+ar0VuK2pg23h4mmJkhsIHe8AjF1MJ6/W3SgXJSX1+i8pfP2PHE36HtkJNmT
 cE+YtRRevKcTc+TpclwYiw/SadvAPr1/RsLdYnIvG/1BjgpZ23V+iNQEmS2OUqgj
 LkjQvqCxsB7IvxS9JSyF
 =a9+i
 -----END PGP SIGNATURE-----

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:

New features:

  - Introduce PERF_RECORD_SWITCH(_CPU_WIDE) and use it in 'record' to
    ask for context switches, allowing non priviledged tasks to know
    when they are switched in and out, which wasn't possible with
    the other context switch tracepoint and software events, see the
    patch description for a comprehensive justification (Adrian Hunter)

  - Stop collecting /proc/kallsyms in perf.data files, saving about
    4.5MB on a typical x86-64 system, use the the symbol resolution
    routines used in all the other tools (report, top, etc) now that
    we can ask libtraceevent to use perf's symbol resolution code.
    (Arnaldo Carvalho de Melo)

User visible fixes:

  - Expose perf's symbol resolver to libtraceevent, so that its plugins can
    resolve tracepoint fields to kernel functions, like the 'function' field
    in the "timer:hrtimer_start tracepoint" (Arnaldo Carvalho de Melo)

Infrastructure changes:

  - Map propagation of thread and cpu maps improvements, prep work for
    'perf stat' new features (Jiri Olsa)

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 2015-07-27 17:56:18 +02:00
commit 4b0c53e9e1
33 changed files with 513 additions and 110 deletions
Download patch file Download diff file Expand all files Collapse all files