Displaying MVS device allocation group locks information
Use the DISPLAY ALLOC,GRPLOCKS command to display information about
the current Device Allocation group locks that are being held. The
operator can specify one of the four different options:
specify all group locks
group locks for which contention exists
group locks associated with a particular device
group locks associated with a particular jobname
D ALLOC,GRPLOCKS
D ALLOC,GRPLOCKS
{ ,ALL }
{ ,CONTENTION | C }
{ ,DEVICE | D = d }
{ ,JOBNAME | J = j }
[,L={a|name|name-a}]
The parameters are:
ALL
Indicates that in all groups in which Device Allocation group
locks are either being held or waited on, the group number, the device(s),
the jobname(s), the asid(s), and the status of the job(s) are to be
displayed.
CONTENTION or C
Indicates that in all groups that are in Device Allocation group
lock contention (groups that have both owners and waiters on their
group locks), the group number, the device(s), the jobname(s), the
asid(s), and the status of the job(s) are to be displayed.
DEVICE or D = d
Indicates that for all groups that are either holding or waiting
on Device Allocation group locks for a particular named device, the
group number, the device(s), the jobname(s), the asid(s), and the
status of the job(s) are to be displayed.
JOBNAME or J = j
Indicates that for all groups in which Device Allocation group
locks are either held or waited on by the specified job, the group
number, the device(s), the jobname(s), the asid(s), and the status
of the job(s) are to be displayed.
L=a, name,orname-a
Specifies the display area (a), console name (name),
or both (name-a) where the display is to appear.
If you omit this operand, the display is presented in the first available
display area or the message area of the console through which you
enter the command.