lq subcommand

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The lq subcommand displays information about threads waiting on a lock.

Format

lq [ bucket | effectiveaddress ]

Parameters

Item Description
bucket Displays information about a thread in the specified lock queue bucket.
effectiveaddress Displays information about a thread in the lock queue bucket that is specified by the effective address.

When run without any parameters, this subcommand displays a list of all threads which are currently waiting on some lock. With a parameter, the subcommand displays information about a waiting thread in a specific lock queue bucket.

Other

lockq

Examples

The following is an example of how to use the lq subcommand:

KDB(0)> lq
                    BUCKET HEAD            COUNT

slist_table+0007E0    253 pvthread+003000     1
KDB(0)> lq 253 (lock queue bucket from the previous command)
SLIST_TABLE ENTRY(253): slist_table+0007E0
                SLOT NAME     STATE    TID PRI  RQ CPUID  CL WCHAN

pvthread+003000   96*v3fshelp SLEEP 006023 03E   2         0 inodes+3F48A64 slis
t_table+0007E0 
KDB(0)>