CPU - Interrupts distribution

Login or Register to Reply

Thread Tools Search this Thread
# 1  
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


Server Physical Host Name *********com

OS Type Linux
OS Classlinux red hat enterprise linux
OS Versionlinux system x3550 m2 -[7946ac1]-
MS Build VersionKernel2.6.18-247.el5.bz683155
Kernel Architecturex86_64
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

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
# 3  
Also captured the yeild for
cat /proc/interrupts

           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..
# 4  
Moderator's Comments:
Mod Comment 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.
This User Gave Thanks to Don Cragun For This Post:
Login or Register to Reply

Thread Tools Search this Thread
Search this Thread:
Advanced Search

More UNIX and Linux Forum Topics You Might Find Helpful
Traps and Interrupts
Well, I don't know where exactly to ask this doubt so I'm asking in the newbie section. I was reading about traps and interrupts when I thought of traps as something that cease the control of the OS from the user and interrupts that cease the control yet provide support for multitasking. Am I right...... UNIX for Dummies Questions & Answers
UNIX for Dummies Questions & Answers
Interrupts problems
Hi, My machine is a Unixware 7.1.3 is a files server, and I had never problem with that machine, but since two days, the machine presents slows problems, i think that the problem is te device interrupts, I had checked all and I dont found it any problem. Any idea? Thanks, (sorry my...... UNIX for Advanced & Expert Users
UNIX for Advanced & Expert Users
How to bind interrupts on a specific CPU
Hello, we practise our server with operating system ReliantUNIX 5.45 and we are using Informix Dynamic Server 7.31. I ascertained a lot of cpu interrupts per second (int/s). The count of int/s exceeds critical maximum value considerably. Machine specific notes for Informix Dynamic Server...... UNIX for Advanced & Expert Users
UNIX for Advanced & Expert Users
catching interrupts
hey i have been facing a problem,can you tell me if we can catch ctrl d in unix i have tried and sucessfully catched and disabled ctrl-c and ctrl -z but am not sure if we can do the same for CTRL-D, so got any clue mail on he forum or ...i mean c programming in Unix thats what i am working on... UNIX for Dummies Questions & Answers
UNIX for Dummies Questions & Answers