LSF Version 7.3 - Administering Platform LSF

Load Indices
240 Administering Platform LSF
CPU run queue lengths (r15s, r1m, r15m)
The r15s, r1m and r15m load indices are the 15-second, 1-minute and 15-minute
average CPU run queue lengths. This is the average number of processes ready to
use the CPU during the given interval.
On UNIX, run queue length indices are not necessarily the same as the load
averages printed by the
uptime(1) command; uptime load averages on some
platforms also include processes that are in short-term wait states (such as paging
or disk I/O).
Effective run queue
length
On multiprocessor systems, more than one process can execute at a time. LSF scales
the run queue value on multiprocessor systems to make the CPU load of
uniprocessors and multiprocessors comparable. The scaled value is called the
effective run queue length.
Use
lsload -E to view the effective run queue length.
Normalized run
queue length
LSF also adjusts the CPU run queue based on the relative speeds of the processors
(the CPU factor). The normalized run queue length is adjusted for both number of
processors and CPU speed. The host with the lowest normalized run queue length
will run a CPU-intensive job the fastest.
Use
lsload -N to view the normalized CPU run queue lengths.
CPU utilization (ut)
The ut index measures CPU utilization, which is the percentage of time spent
running system and user code. A host with no process running has a
ut value of 0
percent; a host on which the CPU is completely loaded has a
ut of 100 percent.
Paging rate (pg)
The pg index gives the virtual memory paging rate in pages per second. This index
is closely tied to the amount of available RAM memory and the total size of the
processes running on a host; if there is not enough RAM to satisfy all processes, the
paging rate will be high. Paging rate is a good measure of how a machine will
respond to interactive use; a machine that is paging heavily feels very slow.
Login sessions (ls)
The ls index gives the number of users logged in. Each user is counted once, no
matter how many times they have logged into the host.
Interactive idle time (it)
On UNIX, the it index is the interactive idle time of the host, in minutes. Idle time
is measured from the last input or output on a directly attached terminal or a
network pseudo-terminal supporting a login session. This does not include activity
directly through the X server such as CAD applications or
emacs windows, except
on Solaris and HP-UX systems.
On Windows, the
it index is based on the time a screen saver has been active on a
particular host.