On further exploration, this seems to be related to the LAN card which
is also no longer functioning.
``ifconfig eth0 down`` stops the CPU spikes.
As indicated in the above attachments, my LAN card is:
03:00.0 Network controller [0280]: Intel Corporation PRO/Wireless 3945ABG
[Golan] Network Connection [8086:4227] (rev 02)
Subsystem: Intel Corporation Device [8086:1010]
Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR+ FastB2B- DisINTx+
Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort-
<MAbort- >SERR- <PERR- INTx-
Latency: 0, Cache Line Size: 64 bytes
Interrupt: pin A routed to IRQ 29
Region 0: Memory at dfcff000 (32-bit, non-prefetchable) [size=4K]
Capabilities: <access denied>
Kernel driver in use: iwl3945
Kernel modules: iwl3945
--
events/0 spikes CPU every 3 seconds since upgrade to 2.6.31-20
https://bugs.launchpad.net/bugs/537396
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