lsmp.tproj/lsmp.1

   1 .\" Copyright (c) 2012, Apple Inc.  All rights reserved.
   2 .\"
   3 .Dd Jul 24, 2012
   4 .Dt LSMP 1
   5 .Os "Mac OS X"
   6 .Sh NAME
   7 .Nm lsmp
   8 .Nd Display mach port information for processes on the system
   9 .Sh SYNOPSIS
  10 .Nm lsmp
  11 .Fl h
  12 .Pp
  13 .Nm lsmp
  14 .Ar <pid>
  15 Show mach port usage for <pid>
  16 .Pp
  17 .Nm lsmp
  18 .Ar -all
  19 Show mach port usage for all tasks in the system
  20 .Sh DESCRIPTION
  21 The
  22 .Nm lsmp
  23  command prints information about every active right in a task's port space, giving a view into the inter-process communication behavior of that task.
  24 .P
  25 .nf
  26 Following is an explanation of each symbol and values from the output.
  27 name        : Task unique name for a port. A "-" signifies that this is a member of a port-set
  28 ipc-object  : A unique identifier for a kernel object. A "+" sign implies that this entry is expanded from above ipc-object.
  29 rights      : Rights corresponding to this name. Possible values are recv, send, send-once and port-set.
  30 flags       : Flags indicating port status.
  31                 T : Port has tempowner set
  32                 G : Port is guarded
  33                 S : Port has strict guarding restrictions
  34                 I : Port has importance donation flag set
  35                 R : Port is marked reviving
  36                 P : Port has task pointer set
  37 boost       : Importance boost count
  38 reqs        : Notifications armed on this port.
  39                 D : Dead name notification
  40                 N : No sender notification
  41                 P : Port Destroy requests
  42 recv        : Number of recv rights for this name.
  43 send        : Number of send rights stored at this name. This does NOT reflect the total number of send rights for this recv right.
  44 sonce       : Number of outstanding send-once rights for this receive right.
  45 oref        : Do send rights exist somewhere for this receive right?
  46 qlimit      : Queue limit for this port. If orefs column shows -> then it indicates the queue limit on the destination port. And a <- indicates this port right is destined to receive messages from process referred in identifier column.
  47 msgcount    : Number of messages enqueued on this port. See qlimit for -> and <- explanations.
  48 context     : Mach port context value.
  49 identifier  : A unique identifier for a kernel object or task's name for this right. This field is described by the type column.
  50 .fi
  51 .Sh SEE ALSO
  52 .Xr ddt 1
  53 .Xr top 1