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CPU - Interrupts distribution

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Old Unix and Linux 02-09-2015
r_t_1601 r_t_1601 is offline
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CPU - Interrupts distribution

Hi Gurus,

I have a situation runing my ETL tools on the below server. The throughput while processing data is coming very low. When i tried to analyse the CPU stats i got colleceted the
Code:
mpstat

.


Code:
Server Physical Host Name *********com

IP**.***.**
OS Type Linux
OS Classlinux red hat enterprise linux
OS Versionlinux system x3550 m2 -[7946ac1]-
MS Build NameMSSB-LEGACY
MS Build VersionKernel2.6.18-247.el5.bz683155
Kernel Architecturex86_64
Manufacturerlinux
Modelsystem x3550 m2 -[7946ac1]-Server Config2-WayServer ClassNon-Blade
Model RollupSystem x3550 M2 -[7946AC1]-
Number Of CPU2
Number Of CPU Cores2
Virtual CPU Count16CPU Type2.22 GHz x86_64CPU 
Speed2220RAM MB48271
Tier DescriptionTier 3 - Restricted Availability
Internal Disk SizeNASAN IdNA

i have attached the
Code:
mpstat

info i collected.
My worry is whenever the interrupts / sec > 3000 , the interrupts are distributed to cpu0 and cpu 15 for major chunk , rest of the cpu's are sitting idle. Even in that distribution CPU 0 only gets 1000 interrupts and CPU 15 has the remaining ~ 80 -90% of the load.
Is the behaviour correct , kindly provide an opinion,

Last edited by r_t_1601; 02-10-2015 at 11:47 PM.. Reason: text alignment
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Old Unix and Linux 02-09-2015
r_t_1601 r_t_1601 is offline
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PFA the
Code:
mpstat

output
Attached Files
File Type: xls mpstat.xls (1.44 MB, 0 views)
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Old Unix and Linux 02-09-2015
r_t_1601 r_t_1601 is offline
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Also captured the yeild for
Code:
cat /proc/interrupts


Code:
           CPU0,    CPU1,     CPU2,     CPU3,   CPU4,    CPU5,  CPU6,    CPU7,    CPU8,    CPU9,    CPU10,      CPU11,  CPU12,    CPU13,    CPU14,   CPU15,
130:00:00,  1048,       0,      0,       0,       0,      0,       0,       0,       0,       0,        0,  202064668,       0,        0,        0, 512532716, PCI-MSI, eth0 
185:00:00, 5385, 3181749, 3266781, 1267992, 3453589, 2981991, 104657, 265, 0, 66125, 10136, 85428, 2100126, 1341219, 65914, 0, IO-APIC-level, lpfc
193:00:00, 4453, 3421072, 3176832, 975485, 2866437, 3487992, 302016, 29507, 0, 960, 67873, 100243, 1338298, 2182582, 0, 0, IO-APIC-level, lpfc
201:00:00, 7326, 21563193, 12967850, 1946063, 0, 62303, 5370651, 543112, 0, 3329977, 14479511, 65730, 0, 19, 12861008, 20370, IO-APIC-level, megasas
NMI:, 323299, 99906, 73879, 61131, 266359, 91899, 75309, 61200, 102974, 104665, 80748, 104176, 98485, 119343, 91712, 114415, , 
LOC:, 4155248420, 4155248563, 4155248841, 4155248725, 4155248852, 4155248711, 4155249174, 4155249117, 4155248301, 4155247903, 4155248172, 4155248183, 4155248709, 4155248296, 4155248535, 4155248532,

saw uneven
distribution for CPU 0 , CPU 11 and CPU 15 , can anyone suggest if this normal behaviour ?

Last edited by r_t_1601; 02-09-2015 at 06:43 AM..
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Old Unix and Linux 02-09-2015
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Moderator's Comments:
CPU - Interrupts distribution I don't feel like taking the time to throw away the hundreds of FONT and COLOR tags you have added inside the CODE tags in your posts in this thread that seem to be intended to make it difficult to read or to understand what information you're trying to convey. Presenting white text on a light gray background with sixteen fields with no space between them seems to be intended to obfuscate any information that may be hidden in your posts.

Please edit your posts in this thread to remove FONT and COLOR tags and add appropriate field and line breaks so we can understand the data you are trying to present.
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