34 Commits

Author SHA1 Message Date
jtl
c6a9e07a8c Fix the date on the pmcstat(8) man page from r291016.
Approved by:	gnn (mentor)
MFC after:	1 month
X-MFC with:	r291016
Pointy hat to:	jtl
2015-11-18 15:12:24 +00:00
jtl
e193259d09 Support a wider history counter in pmcstat(8) gmon output
pmcstat(8) contains an option to output sampling data in a gmon format
compatible with gprof(1). Currently, it uses the default histcounter,
which is an (unsigned short). With large sets of sampling data, it
is possible to overflow the maximum value provided by an (unsigned
short).

This change adds the -e argument to pmcstat. If -e and -g are both
specified, pmcstat will use a histcounter type of uint64_t.

Differential Revision:	https://reviews.freebsd.org/D4151
Reviewed by:	jhb, bjk
Approved by:	gnn (mentor)
MFC after:	1 month
Sponsored by:	Juniper Networks
2015-11-18 14:52:01 +00:00
jhb
f9f0a47b0f 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
jhb
57645743ad 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
vangyzen
2ea615c75c 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
bapt
6aa2cf1585 Fix rendering
Submitted by:	brueffer
2014-10-27 15:50:47 +00:00
bapt
507a146803 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
800ebf9bd0 mdoc: kill EOL whitespace. 2014-07-29 19:49:27 +00:00
bapt
c0cd28f928 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
gnn
8d10828996 Update the date on the manual page.
Pointed out by: bz
2014-05-18 15:31:53 +00:00
gnn
f767e17c96 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
scottl
abe04f2a9a 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
401c81aaa9 Minor spelling fixes. 2012-06-03 11:29:48 +00:00
joel
906214101c mdoc: correct .Bd/.Bl arguments.
Reviewed by:	brueffer
2012-03-26 21:22:53 +00:00
uqs
3960614646 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
fabient
2d898efa0f - 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
jkoshy
50a949cca0 Catch up with the times: "mozilla" -> "firefox". 2009-06-02 04:45:56 +00:00
attilio
eff98a06a3 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
jkoshy
de3502c946 - 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
jkoshy
7b7904fe0c Add an example illustrating the use sleep(1) for performing timed
measurements.
2008-09-19 13:17:22 +00:00
jkoshy
0eb008c767 Document messages printed in verbose mode.
Requested by:	Fabien Thomas <fabien.thomas at netasq dot com>
2008-06-29 10:30:06 +00:00
jkoshy
2aef7957ec 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
jkoshy
0dfc773563 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
jkoshy
bf9c7e516d 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
ru
081fcce9b9 Markup fixes. 2006-09-29 17:57:04 +00:00
jkoshy
80251d4f05 - 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
jkoshy
48e5e4792d 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
jkoshy
94200415ae 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
rwatson
1cfa2c3d67 Fix spelling error in sample command.
MFC after:	3 days
2005-07-13 13:18:17 +00:00
jkoshy
e90ce451ce 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
jkoshy
3cade8d074 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
jkoshy
dacb5026fc - 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
jkoshy
1d3209ab83 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
jkoshy
dc3444cd91 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