Commit Graph

8 Commits

Author SHA1 Message Date
Joseph Koshy
f15067e8b2 Fix breakage introduced in rev 1.7.
MFC after:	3 days
2005-07-14 15:09:14 +00:00
Joseph Koshy
fbf1556d46 sys/dev/hwpmc/hwpmc_{amd,piv,ppro}.c:
- Update driver interrupt statistics correctly.

sys/sys/pmc.h, sys/dev/hwpmc/hwpmc_mod.c:
- Fix a bug affecting debug printfs.
- Move the 'stalled' flag from being in a bit in the
  'pm_flags' field of a 'struct pmc' to a field of its own in the
  same structure.  This flag is updated from the NMI handler and
  keeping it separate makes it easier to avoid races with other
  parts of the code.

sys/dev/hwpmc/hwpmc_logging.c:
- Do arithmetic with 'uintptr_t' types rather that casting
  to and from 'char *'.

Approved by:	re (scottl)
2005-07-09 17:29:36 +00:00
Joseph Koshy
f263522a45 MFP4:
- Implement sampling modes and logging support in hwpmc(4).

- Separate MI and MD parts of hwpmc(4) and allow sharing of
  PMC implementations across different architectures.
  Add support for P4 (EMT64) style PMCs to the amd64 code.

- New pmcstat(8) options: -E (exit time counts) -W (counts
  every context switch), -R (print log file).

- pmc(3) API changes, improve our ability to keep ABI compatibility
  in the future.  Add more 'alias' names for commonly used events.

- bug fixes & documentation.
2005-06-09 19:45:09 +00:00
Joseph Koshy
36c0fd9d0f Kernel hooks to support PMC sampling modes.
Reviewed by:	alc
2005-05-30 06:29:29 +00:00
Joseph Koshy
c5153e190b Add convenience APIs pmc_width() and pmc_capabilities() to -lpmc.
Have pmcstat(8) and pmccontrol(8) use these APIs.

Return PMC class-related constants (PMC widths and capabilities)
with the OP GETCPUINFO call leaving OP PMCINFO to return only the
dynamic information associated with a PMC (i.e., whether enabled,
owner pid, reload count etc.).

Allow pmc_read() (i.e., OPS PMCRW) on active self-attached PMCs to
get upto-date values from hardware since we can guarantee that the
hardware is running the correct PMC at the time of the call.

Bug fixes:
 - (x86 class processors) Fix a bug that prevented an RDPMC
   instruction from being recognized as permitted till after the
   attached process had context switched out and back in again after
   a pmc_start() call.

   Tighten the rules for using RDPMC class instructions: a GETMSR
   OP is now allowed only after an OP ATTACH has been done by the
   PMC's owner to itself.  OP GETMSR is not allowed for PMCs that
   track descendants, for PMCs attached to processes other than
   their owner processes.

 - (P4/HTT processors only) Fix a bug that caused the MI and MD
   layers to get out of sync.  Add a new MD operation 'get_config()'
   as part of this fix.

 - Allow multiple system-mode PMCs at the same row-index but on
   different CPUs to be allocated.

 - Reject allocation of an administratively disabled PMC.

Misc. code cleanups and refactoring.  Improve a few comments.
2005-05-01 14:11:49 +00:00
Joseph Koshy
6b8c8cd85f Return the correct register number in the 'get_msr()' MD function.
Only allow a process to use the x86 RDPMC instruction if it has
allocated and attached a PMC to itself.

Inform the MD layer of the "pseudo context switch out" that needs
to be done when the last thread of a process is exiting.
2005-04-28 08:13:19 +00:00
Marcel Moolenaar
7ad17ef97e Include <sys/pmc.h> instead of <machine/pmc_mdep.h>. The MI header
includes the MD header for us. Do not include <machine/specialreg.h>
as it is not a header file that can be included from MI files. It
is included from <machine/pmc_mdep.h> if so needed and possible.

Ok'd: jkoshy@
2005-04-20 20:26:39 +00:00
Joseph Koshy
ebccf1e3a6 Bring a working snapshot of hwpmc(4), its associated libraries, userland utilities
and documentation into -CURRENT.

Bump FreeBSD_version.

Reviewed by:	alc, jhb (kernel changes)
2005-04-19 04:01:25 +00:00