1. 20 Dec, 2011 10 commits
  2. 12 Dec, 2011 3 commits
  3. 07 Dec, 2011 2 commits
    • Andreas Krebbel's avatar
      oprofile, s390: Add event interface to the System z hardware sampling module · dd3c4670
      Andreas Krebbel authored
      With this patch the OProfile Basic Mode Sampling support for System z
      is enhanced with a counter file system.  That way hardware sampling
      can be configured using the user space tools with only little
      modifications.
      
      With the patch by default new cpu_types (s390/z10, s390/z196) are
      returned in order to indicate that we are running a CPU which provides
      the hardware sampling facility.  Existing user space tools will
      complain about an unknown cpu type. In order to be compatible with
      existing user space tools the `cpu_type' module parameter has been
      added.  Setting the parameter to `timer' will force the module to
      return `timer' as cpu_type.  The module will still try to use hardware
      sampling if available and the hwsampling virtual filesystem will be
      also be available for configuration.  So this has a different effect
      than using the generic oprofile module parameter `timer=1'.
      
      If the basic mode sampling is enabled on the machine and the
      cpu_type=timer parameter is not used the kernel module will provide
      the following virtual filesystem:
      
      /dev/oprofile/0/enabled
      /dev/oprofile/0/event
      /dev/oprofile/0/count
      /dev/oprofile/0/unit_mask
      /dev/oprofile/0/kernel
      /dev/oprofile/0/user
      
      In the counter file system only the values of 'enabled', 'count',
      'kernel', and 'user' are evaluated by the kernel module. Everything
      else must contain fixed values.
      
      The 'event' value only supports a single event - HWSAMPLING with value
      0.
      
      The 'count' value specifies the hardware sampling rate as it is passed
      to the CPU measurement facility.
      
      The 'kernel' and 'user' flags can now be used to filter for samples
      when using hardware sampling.
      
      Additionally also the following file will be created:
      /dev/oprofile/timer/enabled
      
      This will always be the inverted value of /dev/oprofile/0/enabled. 0
      is not accepted without hardware sampling.
      Signed-off-by: default avatarAndreas Krebbel <krebbel@linux.vnet.ibm.com>
      Signed-off-by: default avatarRobert Richter <robert.richter@amd.com>
      dd3c4670
    • Robert Richter's avatar
      oprofile: Fix oprofile_timer_exit() breakage · f8c85203
      Robert Richter authored
      Removing remainings of oprofile_timer_exit() completly.
      Signed-off-by: default avatarRobert Richter <robert.richter@amd.com>
      f8c85203
  4. 06 Dec, 2011 14 commits
  5. 05 Dec, 2011 11 commits