Re: [Bug #12650] Strange load average and ksoftirqd behavior with 2.6.29-rc2-git1

Damien Wyart
2009-02-16T20:44:27Z

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* Paul E. McKenney <paulmck@linux.vnet.ibm.com> [2009-02-16 10:56]:
> Would you be willing to enable CONFIG_RCU_TRACE and CONFIG_TREE_RCU,
> reproduce this and send the output of the debugfs files rcu/rcudata
> and rcu/rcuhier? The commands for this would be:

> mkdir /debug || :
> mount -t debugfs debugfs /debug
> cat /debug/rcu/rcuhier
> cat /debug/rcu/rcudata

Here are the two files (stored while the ksoftirqd problem occurs)
attached.

--
Damien

[-- Attachment #2: rcuhier.txt --]
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rcu:
c=6148 g=6149 s=2 jfq=3 j=31ba nfqs=62392/nfqsng=3(62389) fqlh=7
1/3 0:1 ^0
rcu_bh:
c=-296 g=-296 s=2 jfq=-93079 j=31ba nfqs=6/nfqsng=0(6) fqlh=0
0/3 0:1 ^0

[-- Attachment #3: rcudata.txt --]
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rcu:
0 c=6163 g=6164 pq=0 pqc=6162 qp=1 rpfq=2 rp=a249 dt=729511/1 dn=0 df=10 of=0 ri=38915 ql=5 b=10
1 c=6163 g=6164 pq=1 pqc=6163 qp=0 rpfq=0 rp=d580 dt=34418019/1 dn=0 df=374 of=0 ri=19636 ql=0 b=10
rcu_bh:
0 c=-296 g=-296 pq=1 pqc=-296 qp=0 rpfq=-19494 rp=e947 dt=729511/1 dn=0 df=0 of=0 ri=0 ql=0 b=10
1 c=-296 g=-296 pq=1 pqc=-296 qp=1 rpfq=-16839253 rp=2918 dt=34418019/1 dn=0 df=0 of=0 ri=2 ql=0 b=10