PEEK Reference Manual

PEEK Syntax and Examples
PEEK Reference Manual — 529657-006
2 - 37
Elements of the PAGING Display
PAGES
(continued)

LOCKED (KSEG0) — number of pages currently locked in Kseg 0
and maximum number of swappable pages in Kseg 0 that can be
locked by various pro
cesses at any given time. The current
maximum is 7/8 of the total number of swappable pages in Kseg 0.
This maximum preven
ts all of the memory in Kseg 0 from being
locked at the same time, thus
preventing deadlocks.

FAULTS — number of page faults that have occurred.

ALLOCS — number of requests for the allocation of a page.

DISKREADS— number of times a page was read in from disk.

DISKWRITES — number of times a page was written to disk.

MUTEXCRAX — number of times the CRAX (Convert Relative to
Absolute Extended) instruction was executed under mutex.

NONMUTEXCRAX—number of times the CRAX instruction was
executed, not under mutex.

REDHIT — number of times a page had to be allocated under
mutex, and the number of free pages was less than the FREERED
counter.

REDBUSY — number of times a page had to be allocated under
mutex, and the number of free pages was less than the FREERED
counter, but the memory management semaphore was not
available.

REDTASK — number of times a page had to be allocated under
mutex, the number of free pages was less than the FREERED
counter, and the memory management semaphore was available,
but some other memory management requirement could not be
met.

(per sec) — average number per second for each of these
elements: FAULTS, ALLOCS, DISKREADS, DISKWRITES,
MUTEXCRAX, NONMUTEXCRAX, REDHIT, REDBUSY,
REDTASK.
CLEANQ Reports these statistics for the clean queue (the list of pages to be
cleaned):

CLEANQ—number of pages in the clean queue.

FULLS—number of times the clean queue was full, preventing a
dirty page from being queued.
FRLST Reports these statistics for the free list:

HITS—number of times a request for allocation of a page was
satisfied from the free list of pages, without having to make a clock
call.
Table 2-7. PAGING Elements Reported in the PAGING Display (page 2 of 3)
Element Description