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| author | Heinz Graalfs <graalfs@linux.vnet.ibm.com> | 2011-01-21 10:06:53 +0000 |
|---|---|---|
| committer | Robert Richter <robert.richter@amd.com> | 2011-02-15 11:08:50 +0100 |
| commit | 997dbb4967da248808850c250182ef2528fff2d1 (patch) | |
| tree | b41497541383c2e569b629fbab09fb2280611965 /drivers/oprofile/oprof.h | |
| parent | ec6a3df1c008d9e8664e53b0363f6847c5c0dc3f (diff) | |
| download | op-kernel-dev-997dbb4967da248808850c250182ef2528fff2d1.zip op-kernel-dev-997dbb4967da248808850c250182ef2528fff2d1.tar.gz | |
oprofile, s390: Enhance OProfile to support System zs hardware sampling feature
OProfile is enhanced to export all files for controlling System z's
hardware sampling, and to invoke hwsampler exported functions to
initialize and use System z's hardware sampling.
The patch invokes hwsampler_setup() during oprofile init and exports
following hwsampler files under oprofilefs if hwsampler's setup
succeeded:
A new directory for hardware sampling based files
/dev/oprofile/hwsampling/
The userland daemon must explicitly write to the following files
to disable (or enable) hardware based sampling
/dev/oprofile/hwsampling/hwsampler
to modify the actual sampling rate
/dev/oprofile/hwsampling/hw_interval
to modify the amount of sampling memory (measured in 4K pages)
/dev/oprofile/hwsampling/hw_sdbt_blocks
The following files are read only and show
the possible minimum sampling rate
/dev/oprofile/hwsampling/hw_min_interval
the possible maximum sampling rate
/dev/oprofile/hwsampling/hw_max_interval
The patch splits the oprofile_timer_[init/exit] function so that it
can be also called through user context (oprofilefs) to avoid kernel
oops.
Applied with following changes:
* whitespace changes in Makefile and timer_int.c
Signed-off-by: Mahesh Salgaonkar <mahesh@linux.vnet.ibm.com>
Signed-off-by: Maran Pakkirisamy <maranp@linux.vnet.ibm.com>
Signed-off-by: Heinz Graalfs <graalfs@linux.vnet.ibm.com>
Acked-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Robert Richter <robert.richter@amd.com>
Diffstat (limited to 'drivers/oprofile/oprof.h')
| -rw-r--r-- | drivers/oprofile/oprof.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/oprofile/oprof.h b/drivers/oprofile/oprof.h index 177b73d..5a6ceb1 100644 --- a/drivers/oprofile/oprof.h +++ b/drivers/oprofile/oprof.h @@ -35,7 +35,9 @@ struct dentry; void oprofile_create_files(struct super_block *sb, struct dentry *root); int oprofile_timer_init(struct oprofile_operations *ops); +int __oprofile_timer_init(struct oprofile_operations *ops); void oprofile_timer_exit(void); +void __oprofile_timer_exit(void); int oprofile_set_ulong(unsigned long *addr, unsigned long val); int oprofile_set_timeout(unsigned long time); |
