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  1. 30 Mar, 2011 3 commits
    • Arnaldo Carvalho de Melo's avatar
      perf script: Add more documentation about the -f/--fields parameters · 176fcc5c
      Arnaldo Carvalho de Melo authored 
      Using the commit log for 2c9e45f.

Cc: David Ahern <daahern@cisco.com>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      176fcc5c
    • David Ahern's avatar
      perf script: If type not given fields apply to all event types · 2c9e45f7
      David Ahern authored 
      Allow:
  perf script -f <fields>

to be equivalent to:
  perf script -f trace:<fields> -f sw:<fields> -f hw:<fields>

i.e., the specified fields apply to all event types if the type string
is not given.

The field (-f) arguments are processed in the order received. A later
usage can reset a prior request. e.g.,

  -f trace: -f comm,tid,time,sym

The first -f suppresses trace events (field list is ""), but then the second
invocation sets the fields to comm,tid,time,sym. In this case a warning is
given to the user:

  "Overriding previous field request for all events."

Alternativey, consider the order:

  -f comm,tid,time,sym -f trace:

The first -f sets the fields for all events and the second -f suppresses trace
events. The user is given a warning message about the override, and the result
of the above is that only S/W and H/W events are displayed with the given
fields.

For the 'wildcard' option if a user selected field is invalid for an event
type, a message is displayed to the user that the option is ignored for that
type. For example:

  perf script -f comm,tid,trace 2>&1 | less
  'trace' not valid for hardware events. Ignoring.
  'trace' not valid for software events. Ignoring.

Alternatively, if the type is given an invalid field is specified it is an
error. For example:

    perf script -v -f sw:comm,tid,trace 2>&1 | less
    'trace' not valid for software events.

At this point usage is displayed, and perf-script exits.

Finally, a user may not set fields to none for all event types.
i.e., -f "" is not allowed.

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: linux-kernel@vger.kernel.org
LPU-Reference: <1300377801-27246-1-git-send-email-daahern@cisco.com>
Signed-off-by: default avatarDavid Ahern <daahern@cisco.com>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
      2c9e45f7
    • Ingo Molnar's avatar
      Merge branch 'perf/core' of... · ae18cbfe
      Ingo Molnar authored 
      Merge branch 'perf/core' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux-2.6 into perf/core
      ae18cbfe
  3. 29 Mar, 2011 9 commits
  5. 28 Mar, 2011 28 commits
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