I have a CentOS 6 VM running on Win2012 Hyper-v server. This server has 12 processers, 60GB memory, Raid-5 SSD. There's nothing running on the server yet, but it has very high cpu interrupts, always 12K. Is this normal?
====Update===
It looks that one cpu give 1K interrupts.
I changed the cpu to 2, then it shows about 2000 interrupts
then I changed the cpu to 8, it shows about 8000 interrupts
It seems that this is normal.
# vmstat 1 5
procs -----------memory---------- ---swap-- -----io---- --system-- -----cpu-----
r b swpd free buff cache si so bi bo in cs us sy id wa st
0 0 0 59175084 39128 461120 0 0 24 10 1010 17 1 3 96 0 0
0 0 0 59175060 39128 461128 0 0 0 0 12033 120 0 0 100 0 0
0 0 0 59174680 39128 461128 0 0 0 0 12058 134 0 0 99 0 0
0 0 0 59175052 39128 461128 0 0 0 0 12039 127 0 0 99 0 0
1 0 0 59174812 39128 461128 0 0 0 0 12041 121 0 0 100 0 0
# dstat
----total-cpu-usage---- -dsk/total- -net/total- ---paging-- ---system--
usr sys idl wai hiq siq| read writ| recv send| in out | int csw
0 2 98 0 0 0| 179k 369k| 0 0 | 0 0 | 12k 291
0 0 100 0 0 0| 0 0 | 810B 880B| 0 0 | 12k 120
0 0 100 0 0 0| 0 36k|1204B 400B| 0 0 | 12k 153
0 0 100 0 0 0| 0 0 | 820B 400B| 0 0 | 12k 122
0 0 100 0 0 0| 0 0 | 482B 400B| 0 0 | 12k 122
0 0 100 0 0 0| 0 0 | 604B 400B| 0 0 | 12k 122
0 0 100 0 0 0| 0 0 | 992B 400B| 0 0 | 12k 120
