hi ian,

run top to see which process is causing the load.

if it is kipmi, try to add this to the active kernel entry in /etc/grub.conf
ipmi_si.kipmid_max_busy_us=100
and reboot if you can. if you can't reboot, there's probably a way to 
write to /sys to set it (but it will be non-permanent).

stijn



On 01/22/2015 05:48 PM, Ian A Taylor wrote:
> 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.
>
> e-Mail :- [log in to unmask]
> Tel    :- (0)1334-463141
> Fax    :- (0)1334-463104
>
> The University of St Andrews
> is a charity registered in
> Scotland : No SC013532.
>
>