Sir/Madam

I have a 64bit machine on which I run SL6

I upgraded to the latest kernel

uname -a
Linux AAAAAAAA  2.6.32-504.3.3.el6.x86_64 #1 SMP Tue Dec 16 14:29:22 CST 
2014 x86_64 x86_64 x86_64 GNU/Linux

Since I have done this then the machine behaves ok for 25 mins then

The process load on one of the CPU jumps up to 100%

There are 40 processor on this machine


processor	: 39
vendor_id	: GenuineIntel
cpu family	: 6
model		: 62
model name	: Intel(R) Xeon(R) CPU E5-2670 v2 @ 2.50GHz
stepping	: 4
microcode	: 1046
cpu MHz		: 2499.983
cache size	: 25600 KB
physical id	: 1
siblings	: 20
core id		: 12
cpu cores	: 10
apicid		: 57
initial apicid	: 57
fpu		: yes
fpu_exception	: yes
cpuid level	: 13
wp		: yes
flags		: fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge mca cmov 
pat pse36 clflush dts acpi mmx fxsr sse sse2 ss ht tm pbe syscall nx 
pdpe1gb rdtscp lm constant_tsc arch_perfmon pebs bts rep_good xtopology 
nonstop_tsc aperfmperf pni pclmulqdq dtes64 monitor ds_cpl vmx smx est 
tm2 ssse3 cx16 xtpr pdcm pcid dca sse4_1 sse4_2 x2apic popcnt 
tsc_deadline_timer aes xsave avx f16c rdrand lahf_lm ida arat epb 
xsaveopt pln pts dts tpr_shadow vnmi flexpriority ept vpid fsgsbase smep 
erms
bogomips	: 4999.35
clflush size	: 64
cache_alignment	: 64
address sizes	: 46 bits physical, 48 bits virtual
power management:




There is nothing to indicate why this is happening in /var/log/messages

Originally I had a problem with kondemand but I solved this by turning 
off service cpuspeed

However I am not clear why the process load jumps up to 100%

Any help would be sincerely appreciated



Thanking you.

Yours sincerely



Ian Taylor
University of St.Andrews,
School of Physics & Astronomy,
North Haugh,
St.Andrews,
Fife  KY16 9SS,
Scotland.

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Tel    :- (0)1334-463141
Fax    :- (0)1334-463104

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