High Performance Computing

A low load error indicates that the processing resources being used are much lower than what is available on a node. This might not be a problem if a job is using most of the memory but only 1 core on a multi-core node. A combination of low memory and low load suggests the job should be run in a single queue or set up to multi-process several tasks at a time. The example shows a load of 1.02 (line 2), and that the nominal load on the 20-core node (line 10) should be 20 (line 3). User account information is shown in lines 31 to 41.

 1)  E133 - Low load
 2)  The average load per node is low: 1.02
 3)  The average load should be: 20
 4)  The reverified average load per node: 0.99
 5)  The average memory usage per node: 320mb, 0%
 6)  Try to use CPU and memory resources wisely.
 7)
 8)  Node statistics::
 9)  Number of nodes: 1
10)  Number of cores: 20
11)  Total physical memory per node: 64364mb
12)  Average memory usage per node: 320mb, 0%
13)  Average memory usage per core: 16mb
14)  Average virtual memory usage per node: 991mb
15)  Average virtual memory usage per core: 49mb
16)  Average CPU percent per node: 99%
17)  Average CPU percent per core: 4%
18)  Average load per node: 1.02
19)  Reverified average load per node: 0.99
20)  Effective maximum load on a node: 1.02
21)
22)  PBS_job=78197.smic3 user=flast allocation=hpc_alloc04
23)  queue=workq total_load=1.02 cpu_hours=1.48 wall_hours=1.46
24)  unused_nodes=0 total_nodes=1 ppn=20 avg_load=1.02 avg_cpu=99%
25)  avg_mem=320mb avg_vmem=991mb
26)  top_proc=flast:fluent:smic246:451M:270M:1.4hr:99%
27)  toppm=flast:fluent.6.3.26:smic246:451M:270M node_processes=7
28)  avg_avail_mem=62440mb min_avail_mem=62440mb
29)  reverified_avg_load=0.99
30)
31)  Name:  First Last
32)  Mail:  flast@somewhere.lsu.edu
33)  Affil: First Last
34)  Category: validation:current:05/11/2015
35)  Name:  First Last
36)  Mail:  flast@somewhere.lsu.edu
37)  Affil: First Last
38)  Category: validation:current:06/17/2014
39)  Allocations:
40)  hpc_alloc05,flast,1999994.14,
41)  hpc_alloc04,flast,1931.31,