On Tue, 24 May 2011, John David Anglin wrote:
> I built 2.6.39+ Sunday from Linus' tree. System seems slower than before
> and the rcu kernel threads seem to run a lot:
>
> dave@mx3210:~$ ps -ef|grep rcu
> root 7 2 46 May22 ? 21:14:59 [rcuc0]
> root 8 2 0 May22 ? 00:00:00 [rcun0]
> root 9 2 0 May22 ? 00:00:03 [rcun1]
> root 37 2 19 May22 ? 08:55:59 [rcuc1]
> root 41 2 10 May22 ? 04:50:25 [rcuc2]
> root 45 2 11 May22 ? 05:10:35 [rcuc3]
The worst of the load problems are fixed by commit
07ef3c3b44896bc0432a901fe6ae0d0deaca47ce
Load average has now dropped by about a factor two.
However, the rcuc* threads are still major time consumers. After
about three hours of runtime building gcc:
7 root -2 19 0 0 0 S 8 0.0 80:50.10 rcuc0
37 root -2 19 0 0 0 S 2 0.0 37:44.47 rcuc1
41 root -2 19 0 0 0 S 0 0.0 26:39.63 rcuc2
45 root -2 19 0 0 0 S 0 0.0 28:12.77 rcuc3
Dave
--
J. David Anglin dave.anglin@xxxxxxxxxxxxxx
National Research Council of Canada (613) 990-0752 (FAX: 952-6602)
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