Commit Graph

32 Commits

Author SHA1 Message Date
John Baldwin
ef16b9abd4 Use the cpuset API more consistently:
- Fetch the root set from cpuset_getaffinity() instead of assuming all CPUs
  from 0 to hw.ncpu are the root set.
- Use CPU_SETSIZE and CPU_FFS.
- The original notion of halted CPUs the manpage and code refers to is gone.
  Use the term "available" instead.

Differential Revision:	https://reviews.freebsd.org/D2491
Reviewed by:	emaste
MFC after:	1 week
2015-05-27 13:54:37 +00:00
John Baldwin
38fd38349a Use the kern.bootfile sysctl to set the default kernel path rather than
hardcoding /boot/kernel. This allows pmcstat(8) to work without -k when
using nextboot -k or 'boot foo' at the loader to boot alternate kernels.

Differential Revision:	https://reviews.freebsd.org/D2425
Reviewed by:	adrian, emaste, gnn
MFC after:	2 weeks
Sponsored by:	Norse Corp, Inc.
2015-05-08 16:02:31 +00:00
Eric van Gyzen
10813ab380 pmcstat.8: fix -a flag description; improve -m flag to match
The -a flag reads a file saved by -O, not -o.

The -m flag requires the -R flag.  Copy that paragraph from -a.

Reviewed by:	adrian
Approved by:	kib (mentor)
MFC after:	1 week
Sponsored by:	Dell Inc
2015-03-28 21:28:22 +00:00
Baptiste Daroussin
f42d8dec6c Fix rendering
Submitted by:	brueffer
2014-10-27 15:50:47 +00:00
Baptiste Daroussin
99e33eab01 Clarify the documentation of pmcstat:
the -d argument should be passed before -p, -s, -P or -S to be taken in account

Differential Revision:	https://reviews.freebsd.org/D1011
Reviewed by:	adrian, gnn
MFC after:	1 week
2014-10-27 15:33:44 +00:00
Joel Dahl
f8d7aff9dd mdoc: kill EOL whitespace. 2014-07-29 19:49:27 +00:00
Baptiste Daroussin
01c2b8ac0d use .Mt to mark up email addresses consistently (part2)
PR:		191174
Submitted by:	Franco Fichtner  <franco@lastsummer.de>
2014-06-20 09:57:27 +00:00
George V. Neville-Neil
1cb3ec2eb7 Update the date on the manual page.
Pointed out by: bz
2014-05-18 15:31:53 +00:00
George V. Neville-Neil
72fe532cd6 Add a command line argument (-l) to end event collection after some
number of seconds.  The number of seconds may be a fraction.

Submitted by:	Julien Charbon <jcharbon@versign.com>
MFC after:	2 weeks
Relnotes:	yes
2014-05-16 03:18:09 +00:00
Scott Long
f6f851a37b Document the -a option that was added in r262424.
Obtained from:	Netflix, Inc.
MFC after:	3 days
2014-04-29 07:17:33 +00:00
Joel Dahl
8972c8b6a5 Minor spelling fixes. 2012-06-03 11:29:48 +00:00
Joel Dahl
46355096e1 mdoc: correct .Bd/.Bl arguments.
Reviewed by:	brueffer
2012-03-26 21:22:53 +00:00
Ulrich Spörlein
aa12cea2cc mdoc: order prologue macros consistently by Dd/Dt/Os
Although groff_mdoc(7) gives another impression, this is the ordering
most widely used and also required by mdocml/mandoc.

Reviewed by:	ru
Approved by:	philip, ed (mentors)
2010-04-14 19:08:06 +00:00
Fabien Thomas
0b86b1bb01 - Reorganize code in 'plugin' to share log processing.
- Kcachegrind (calltree) support with assembly/source
code mapping and call count estimator (-F).
- Top mode for calltree and callgraph plugin (-T).

MFC after:	1 month
2010-02-11 22:51:44 +00:00
Joseph Koshy
a2c0b3aead Catch up with the times: "mozilla" -> "firefox". 2009-06-02 04:45:56 +00:00
Attilio Rao
c0252222a2 Add the -m option to pmcstat.
This option prints the list of sampled PCs along with the function name,
the start and end addresses of this where their live within.

Reviewed by:	jkoshy
Tested by:	gnn
Sponsored by:	Nokia
2008-11-25 23:24:29 +00:00
Joseph Koshy
5477328d81 - Avoid a spurious error when a command line is specified without
any process scope PMCs.
- Change the -c '*' option to denote non-halted CPUs.
2008-10-07 17:28:52 +00:00
Joseph Koshy
2c79db5107 Add an example illustrating the use sleep(1) for performing timed
measurements.
2008-09-19 13:17:22 +00:00
Joseph Koshy
e572c7a748 Document messages printed in verbose mode.
Requested by:	Fabien Thomas <fabien.thomas at netasq dot com>
2008-06-29 10:30:06 +00:00
Joseph Koshy
b6010f9e61 Introduce pmcstat(8) changes for summarizing hwpmc(4) callchain records in
in textual form and in gmon.out format.

Update manual page.

Sponsored by:	FreeBSD Foundation and Google Inc.
2007-12-07 08:26:21 +00:00
Joseph Koshy
fbd8b34a06 MFP4: Enhancements to pmcstat(8):
- Allow the "-t" option to take a regular expression naming command
  line processes to attach process PMCs to.

- Update the manual page and add an example showing the use of the
  new functionality.

- Update the (c) year on the affected source files.
2007-04-27 12:09:31 +00:00
Joseph Koshy
ee4910b119 MFP4: Enhancements and bug-fixes to pmcstat(8):
- The '-c' option now takes a comma-separated list of CPU
   numbers, or a literal '*' denoting all CPUs in the system.
   Subsequent system PMCs are allocated on the CPUs so specified.

   Change the default behaviour to allocate system PMCs on all CPUs,
   not just CPU 0.

   Update the manual page and add an example of how to use the new
   functionality.

 - Attach PMCs to a (commandline) child process more reliably.  This
   fixes a long standing bug in counting events incurred by short-lived
   processes.
2007-04-22 15:00:39 +00:00
Ruslan Ermilov
bc84aa4ba3 Markup fixes. 2006-09-29 17:57:04 +00:00
Joseph Koshy
302cbb9054 - Teach pmcstat(8) to log over the network; the -O option now
takes a host:port specification.
- Update the manual page and add an example showing how log
  over the network using pmcstat(8) and nc(1).  Document the
  current inability to process logs in cross-platform manner.
- Have pmcstat_open_log() call err(3) directly in case
  of an error; this simplifies error handling in its caller.

MFC after:	1 week
2006-04-02 12:52:16 +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
9f8adcef84 Document pmcstat's inability to handle 32 bit executables on the
AMD64 while I work on a fix.

Noticed by:	ps
2005-10-18 04:40:11 +00:00
Robert Watson
000289660b Fix spelling error in sample command.
MFC after:	3 days
2005-07-13 13:18:17 +00:00
Joseph Koshy
1fdbf2560e Add examples illustrating how to record system-wide profiles and
how to convert these to gprof(1) flat profiles.  Augment description
for the '-g' option.

Remove superfluous quotes around a macro argument, bump document date [1].

Reminded by:	ru [1]
Approved by:	re (blanket hwpmc)
2005-07-01 03:50:30 +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
Joseph Koshy
21ce09ca81 - Tidy markup. [1]
- Remove mention of an unimplemented option.
- Clarify the behavior of pmcstat when logging PMCs are
  requested, but no log output file is specified.
- Add a cross-reference to pmclog(3).
- Bump document date.

Reviewed by:	ru
Submitted by:	ru [1]
Approved by:	re (blanket hwpmc)
2005-06-24 17:24:55 +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
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