Commit Graph

23 Commits

Author SHA1 Message Date
Ruslan Ermilov
a73a3ab56b Markup fixes. 2006-09-17 21:27:35 +00:00
Joseph Koshy
49874f6ea3 MFP4: Support for profiling dynamically loaded objects.
Kernel changes:

  Inform hwpmc of executable objects brought into the system by
  kldload() and mmap(), and of their removal by kldunload() and
  munmap().  A helper function linker_hwpmc_list_objects() has been
  added to "sys/kern/kern_linker.c" and is used by hwpmc to retrieve
  the list of currently loaded kernel modules.

  The unused `MAPPINGCHANGE' event has been deprecated in favour
  of separate `MAP_IN' and `MAP_OUT' events; this change reduces
  space wastage in the log.

  Bump the hwpmc's ABI version to "2.0.00".  Teach hwpmc(4) to
  handle the map change callbacks.

  Change the default per-cpu sample buffer size to hold
  32 samples (up from 16).

  Increment __FreeBSD_version.

libpmc(3) changes:

  Update libpmc(3) to deal with the new events in the log file; bring
  the pmclog(3) manual page in sync with the code.

pmcstat(8) changes:

  Introduce new options to pmcstat(8): "-r" (root fs path), "-M"
  (mapfile name), "-q"/"-v" (verbosity control).  Option "-k" now
  takes a kernel directory as its argument but will also work with
  the older invocation syntax.

  Rework string handling in pmcstat(8) to use an opaque type for
  interned strings.  Clean up ELF parsing code and add support for
  tracking dynamic object mappings reported by a v2.0.00 hwpmc(4).

  Report statistics at the end of a log conversion run depending
  on the requested verbosity level.

Reviewed by:	jhb, dds (kernel parts of an earlier patch)
Tested by:	gallatin (earlier patch)
2006-03-26 12:20:54 +00:00
Joseph Koshy
d8acba2a3e Update the pmc(3) manual page's date string and freshen the year in the (c) line for
pmc.3 and libpmc.c.
2006-03-20 15:28:59 +00:00
Joseph Koshy
177a2f2245 Add an alias 'unhalted-cycles' denoting cycles where the CPU is
not in a halt or sleep state.
2006-02-25 05:34:00 +00:00
Ruslan Ermilov
3a14548604 Fix prototypes. 2005-11-24 10:54:47 +00:00
Ruslan Ermilov
110e1704d3 -mdoc sweep. 2005-11-17 13:00:00 +00:00
Joseph Koshy
5138c36a1b Add COMPATIBILITY and HISTORY sections.
MFC after:	3 days
2005-07-21 06:44:54 +00:00
Joseph Koshy
79b6b08fd5 Catch with the source code. Sort a list alphabetically. Add a
HISTORY section.

MFC after:	3 days
2005-07-21 06:42:30 +00:00
Christian Brueffer
f0ea72a038 - Remove MLINKS to nonexistant manpages
- Change some section numbers to match reality
- For MLINKS to manpages from ports, mention which port installs them

MFC after:	3 days
2005-07-14 20:29:08 +00:00
Joseph Koshy
82c83e34dd Fix a bug in pmclog_read() that causes it to return with a false
error when a log record crosses an internal buffer boundary.

Approved by:	re (scottl)
2005-07-09 17:12:30 +00:00
Joseph Koshy
86a655492a - Update the CPU version check to recognize P4/EMT64 CPUs. [1]
- Allow libpmc(3) to support P4/EMT64 PMCs on the amd64 architecture
  and AMD K8 PMCs on the i386. [2]

Submitted by:	ps [1]
Pointy hat:	myself [2]
Approved by:	re (scottl)
2005-07-03 16:33:22 +00:00
Joseph Koshy
151392465f MFP4:
- pmcstat(8) gprof output mode fixes:

  lib/libpmc/pmclog.{c,h}, sys/sys/pmclog.h:
  + Add a 'is_usermode' field to the PMCLOG_PCSAMPLE event
  + Add an 'entryaddr' field to the PMCLOG_PROCEXEC event,
    so that pmcstat(8) can determine where the runtime loader
    /libexec/ld-elf.so.1 is getting loaded.

  sys/kern/kern_exec.c:
  + Use a local struct to group the entry address of the image being
    exec()'ed and the process credential changed flag to the exec
    handling hook inside hwpmc(4).

  usr.sbin/pmcstat/*:
  + Support "-k kernelpath", "-D sampledir".
  + Implement the ELF bits of 'gmon.out' profile generation in a new
    file "pmcstat_log.c".  Move all log related functions to this
    file.
  + Move local definitions and prototypes to "pmcstat.h"

- Other bug fixes:
  + lib/libpmc/pmclog.c: correctly handle EOF in pmclog_read().
  + sys/dev/hwpmc_mod.c: unconditionally log a PROCEXIT event to all
    attached PMCs when a process exits.
  + sys/sys/pmc.h: correct a function prototype.
  + Improve usage checks in pmcstat(8).

Approved by:	re (blanket hwpmc)
2005-06-30 19:01:26 +00:00
Ruslan Ermilov
9abe909b54 - Tidy up the markup.
- Clarify the sections on "Cascading P4 PMCs" and
  "Precise Event Based Sampling" (1)
- Bump document date.

Reviewed by:	jkoshy
Submitted by:	jkoshy (1)
Approved by:	re (blanket)
2005-06-24 16:56:24 +00:00
Ruslan Ermilov
f711ce99e5 Tidy up the markup.
Reviewed by:	jkoshy
Approved by:	re (blanket)
2005-06-24 16:13:36 +00:00
Joseph Koshy
1455fcd32d Fix tinderbox breakage. 2005-06-10 03:45:04 +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
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
67edd22983 Note events affected by processor errata. 2005-04-23 05:45:18 +00:00
Joseph Koshy
d56c5d4bec Add event aliases for P6 and K8 PMCs. 2005-04-21 05:50:25 +00:00
Marcel Moolenaar
04e9feb06c o Do not include <machine/pmc_mdep.h>. It's automaticly included for
us when <sys/pmc.h> is included.
o  Replace "#if __i386__" and "#if __amd64__" with the equivalent of
   "#ifdef __i386__" and "#ifdef __amd64__" (resp.) These tokens are
   not defined on all platforms.
o  Conditionally compile pmc_parse_mask() on i386 and amd64 only. It's
   only referenced there. This will change when support for other
   platforms is added, of course.

Ok'd by: jkoshy@
2005-04-20 20:48:24 +00:00
Joseph Koshy
c570de2caf Remove extra Id keyword. 2005-04-20 05:36:43 +00:00
Joseph Koshy
90f629a16a Remove superfluous CFLAGS lines. Use the conditional '?=' construct
for WARNS lines.

Submitted by:	ru
2005-04-19 14:43:59 +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