[email protected] wrote:
Question: Why is ksoftirqd eating about 5 to 10 percent of my CPU on an idle
system? The problem occurs if I config the kernel with tickless
support (i.e. CONFIG_TICK_ONESHOT=y). (Thanks to "oprofile" for putting me
onto this.)
I have noted this same problem on kernel versions: 2.6.23.1, 2.6.23.8 and
2.6.23.9
**************************************************************************
*** Output from "vmstat -n 1 10" -- Note very high context switch rate ***
*** This is on a idle machine! ***
**************************************************************************
procs -----------memory---------- ---swap-- -----io---- --system--
----cpu----
r b swpd free buff cache si so bi bo in cs us sy
id wa
0 0 0 1925556 4768 116104 0 0 124 2 6 7538 1 2
96 1
0 0 0 1925556 4768 116104 0 0 0 0 2 147329 0 1
99 0
What did oprofile show? It should be able to narrow down what
function(s) are responsible for the CPU usage..
--
Robert Hancock Saskatoon, SK, Canada
To email, remove "nospam" from [email protected]
Home Page: http://www.roberthancock.com/
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