linux/drivers/oprofile
Robert Richter a0d76247e0 oprofile, s390: Rework hwsampler implementation
This patch is a rework of the hwsampler oprofile implementation that
has been applied recently. Now there are less non-architectural
changes. The only changes are:

* introduction of oprofile_add_ext_hw_sample(), and
* removal of section attributes of oprofile_timer_init/_exit().

To setup hwsampler for oprofile we need to modify start()/stop()
callbacks and additional hwsampler control files in oprofilefs. We do
not reinitialize the timer or hwsampler mode by restarting calling
init/exit() anymore, instead hwsampler_running is used to switch the
mode directly in oprofile_hwsampler_start/_stop(). For locking reasons
there is also hwsampler_file that reflects the value in oprofilefs.

The overall diffstat of the oprofile s390 hwsampler implemenation
shows the low impact to non-architectural code:

 arch/Kconfig                         |    3 +
 arch/s390/Kconfig                    |    1 +
 arch/s390/oprofile/Makefile          |    2 +-
 arch/s390/oprofile/hwsampler.c       | 1256 ++++++++++++++++++++++++++++++++++
 arch/s390/oprofile/hwsampler.h       |  113 +++
 arch/s390/oprofile/hwsampler_files.c |  162 +++++
 arch/s390/oprofile/init.c            |    6 +-
 drivers/oprofile/cpu_buffer.c        |   24 +-
 drivers/oprofile/timer_int.c         |    4 +-
 include/linux/oprofile.h             |    7 +
 10 files changed, 1567 insertions(+), 11 deletions(-)

Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Robert Richter <robert.richter@amd.com>
2011-02-15 11:10:20 +01:00
..
buffer_sync.c oprofile: Remove deprecated use of flush_scheduled_work() 2010-10-29 11:54:18 +02:00
buffer_sync.h
cpu_buffer.c oprofile: Introduce new oprofile sample add function (oprofile_add_ext_hw_sample) 2011-02-15 11:07:07 +01:00
cpu_buffer.h oprofile: Remove deprecated use of flush_scheduled_work() 2010-10-29 11:54:18 +02:00
event_buffer.c oprofile: make event buffer nonseekable 2010-07-26 10:58:24 +02:00
event_buffer.h
oprof.c oprofile, s390: Rework hwsampler implementation 2011-02-15 11:10:20 +01:00
oprof.h oprofile, s390: Rework hwsampler implementation 2011-02-15 11:10:20 +01:00
oprofile_files.c Merge branch 'llseek' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/bkl 2010-10-22 10:52:56 -07:00
oprofile_perf.c oprofile: make !CONFIG_PM function stubs static inline 2010-10-15 12:47:18 +02:00
oprofile_stats.c percpu: make percpu symbols in oprofile unique 2009-10-29 22:34:13 +09:00
oprofile_stats.h oprofile: Adding switch counter to oprofile statistic variables 2009-07-20 16:43:21 +02:00
oprofilefs.c convert get_sb_single() users 2010-10-29 04:16:28 -04:00
timer_int.c oprofile, s390: Rework hwsampler implementation 2011-02-15 11:10:20 +01:00