linux-kernel - [PATCHv4 0/7] perf, tool: Fix endian issues

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Date:	Wed, 16 May 2012 08:59:01 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	acme@...hat.com, a.p.zijlstra@...llo.nl, mingo@...e.hu,
	paulus@...ba.org, cjashfor@...ux.vnet.ibm.com, fweisbec@...il.com
Cc:	linux-kernel@...r.kernel.org, dsahern@...il.com,
	Caspar Zhang <czhang@...hat.com>
Subject: [PATCHv4 0/7] perf, tool: Fix endian issues

hi,
sending fixies to properly handle perf.data endians.

David,
could you please rerun your test? I tried it on my setup and
it works fine.


v4 changes:
  - fixed patch 6/7 which was broken for -fstrict-aliasing related optimization
  - added patch 3/7 and 7/7

v3 changes:
  - added patch 5 to fix addons bitmask handling

v2 changes:
  - added patches 3 and 4 to handle sample_id_all header endianity


Attached patches:
  1/7 perf, tool: Handle different endians properly during symbol load
  2/7 perf, tool: Carry perf_event_attr bitfield throught different endians
  3/7 perf, tool: Add union u64_swap type for swapping u64 data
  4/7 perf, tool: Handle endianity swap on sample_id_all header data
  5/7 perf, tool: Fix 32 bit values endianity swap for sample_id_all header
  6/7 perf, tool: Fix endianity trick for adds_features bitmask
  7/7 perf, tool: Fix callchain ip printf


Tested by running following usecases:
test 1)
  - origin system:
    # perf record -a -- sleep 10 (any perf record will do)
    # perf report > report.origin
    # perf archive perf.data
    
  - copy the perf.data, report.origin and perf.data.tar.bz2
    to a target system and run:
    # tar xjvf perf.data.tar.bz2 -C ~/.debug
    # perf report > report.target
    # diff -u report.origin report.target
    
  - the diff should produce no output
    (besides some white space stuff and possibly different
     date/TZ output)

test 2)
  - origin system:
    # perf record -ag -fo /tmp/perf.data -- sleep 1
  - mount origin system root to the target system on /mnt/origin
  - target system:
    # perf script --symfs /mnt/origin -I -i /mnt/origin/tmp/perf.data \
     --kallsyms /mnt/origin/proc/kallsyms
  - complete perf.data header is displayed 

test 3)
  - tested with old perf.data version, worked proplerly

Tested by above usecase cross following architectures:
  i386, x86_64, s390x, ppc64, ppc32

Big thank to Caspar Zhang who verified this within RH QE testsuites.

thanks,
jirka

CC: Caspar Zhang <czhang@...hat.com>
---
 tools/perf/util/evsel.c                |   39 ++++++++-----
 tools/perf/util/header.c               |   21 +++++--
 tools/perf/util/hist.c                 |    2 +-
 tools/perf/util/include/linux/bitops.h |    1 +
 tools/perf/util/session.c              |  101 ++++++++++++++++++++++++++++----
 tools/perf/util/symbol.c               |   33 ++++++++++-
 tools/perf/util/symbol.h               |   30 +++++++++
 tools/perf/util/types.h                |    5 ++
 8 files changed, 198 insertions(+), 34 deletions(-)
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