To: perfctr-devel@lists.sourceforge.net
Subject: perfctr-2.3.10 released

perfctr-2.3.10 is now available at the usual place:
http://www.csd.uu.se/~mikpe/linux/perfctr/

Version 2.3.10, 2002-07-19
- Added a script, `update-kernel', to simplify the process of
  patching the kernel source code. See INSTALL for details.
- The counter and control registers are now cleared when the
  driver is idle. This should allow the counter hardware to
  power down when not used, especially on P4.
- Some Pentium MMX and Pentium Pro processors have an erratum
  which causes System Management Mode to shut down if user-space
  has been granted access to the RDPMC instruction. The driver
  now avoids granting RDPMC access on the affected processors.
  The user-space library makes this change transparent.
- New CPU type code for Model 2 Pentium 4s, due to a few but
  significant changes between Model 0 and 1 and Model 2 CPUs.  
- The driver now supports Replay Tagging on the Pentium 4.
  The perfex program has been updated to allow users to specify
  values to store in PEBS_ENABLE and PEBS_MATRIX_VERT.
  For example, the following command could be use to count the
  number of L1 cache read misses on a Pentium 4:

  perfex -e 0x0003B000/0x12000204@0x8000000C --p4pe=0x01000001 --p4pmv=0x1 some_program

  Explanation: IQ_CCCR0 is bound to CRU_ESCR2, CRU_ESCR2 is set up
  for replay_event with non-bogus uops and CPL>0, and PEBS_ENABLE
  and PEBS_MATRIX_VERT are set up for the 1stL_cache_load_miss_retired
  metric. Note that bit 25 is NOT set in PEBS_ENABLE.

/ Mikael Pettersson