High Interrupts per second Troubleshooting
This document (7002721) is provided subject to the disclaimer at the end of this document.
Environment
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server 11
Situation
#==[ Command ]======================================#
# /usr/bin/vmstat 1 4 vvvvv
procs -----------memory---------- ---swap-- -----io---- -system-- -----cpu------
r b swpd free buff cache si so bi bo in cs us sy id wa st
1 1 373704 7156 1296 4144 47 78 139 92 2450 574 9 27 64 0 0
24 16 376664 6924 1360 3152 532 3104 552 3356 18101 33269 3 97 0 0 0
15 15 386388 6788 1356 5260 5872 10212 8656 10284 17623 39149 2 96 0 1 0
10 10 389896 6720 1232 3244 2384 3584 2532 3640 18893 17113 11 89 0 0 0
^^^^^
Resolution
NOTE: The procinfo package is not installed by default on SLES 15. Install it before running a supportconfig.
# zypper install procinfo
#==[ Command ]======================================#
# /usr/bin/procinfo
Linux 2.6.16.60-0.21-default (geeko@buildhost) (gcc 4.1.2 20070115) #1 1CPU [sles10sp2]
Memory: Total Used Free Shared Buffers
Mem: 776380 282212 494168 0 3060
Swap: 1164672 127300 1037372
Bootup: Fri Feb 20 10:01:32 2009 Load average: 358.38 684.55 657.44 1/922 26155
user : 0:19:02.40 8.3% page in : 4329495 disk 1: 345167r 57598w
nice : 0:00:05.10 0.0% page out: 1834648 disk 2: 97r 362w
system: 0:30:36.43 13.4% page act: 397986
IOwait: 0:00:13.29 0.1% page dea: 1242187
hw irq: 0:00:08.72 0.1% page flt: 7741915
sw irq: 0:32:47.66 14.3% swap in : 715353
idle : 2:16:20.71 59.5% swap out: 409390
uptime: 3:49:08.45 context : 12105392
irq 0: 3288376 timer irq 8: 2 rtc
irq 1: 7108 i8042 irq 9: 0 acpi
irq 3: 1 irq 12: 3749 i8042
irq 4: 1 irq 15: 128222 ide1
irq 6: 4 irq169: 343932 ioc0
irq 7: 0 parport0 irq177: 28216486 eth0
^^^^^^^^^^^^^^^^^^^^^^
From this example, irq177 (eth0) is generating the most interrupts. You might consider replacing the network card. You might also consider updating the network kernel driver.
Disclaimer
This Support Knowledgebase provides a valuable tool for SUSE customers and parties interested in our products and solutions to acquire information, ideas and learn from one another. Materials are provided for informational, personal or non-commercial use within your organization and are presented "AS IS" WITHOUT WARRANTY OF ANY KIND.
- Document ID:7002721
- Creation Date: 20-Feb-2009
- Modified Date:26-Aug-2021
-
- SUSE Linux Enterprise Desktop
- SUSE Linux Enterprise Server
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