[Discuss] Is this bad?

[warlord at MIT.EDU (Derek Atkins)]

Dan Ritter <dsr at randomstring.org> writes:

>> Okay, perhaps it is the Ethernet driver that's causing the ksoftirq/1
>> thread to spin at 100% cpu usage.  I really need to track this down,
>> because I'm losing bits in my TV records when this happens, and it's
>> also causing other bits to be delayed.
>
> ksoftirqd is run once per core, so this is something causing
> your second core (/0, /1, ...) to be woken up an awful lot.
>
> Anything obvious in dmesg?

Nope.

>> Maybe I should move my MySQL database to another machine?
>
> Is it on a disk separate from your recordings?

No, it's not.  And it's been fine this way for the past 6-8 years.  It's
only started being an issue over the past few months.  But the recording
loss seems to happen simultaneously with the softirq spinning.
Recording comes from some HD HomeRun devices.

I could try to separate it.  Or I could try moving mysql to another
machine.  I wonder -- how well would mysql run on a Plug computer,
either a Sheeva or Guru plug?

> -dsr-

-derek

-- 
       Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
       Member, MIT Student Information Processing Board  (SIPB)
       URL: http://web.mit.edu/warlord/    PP-ASEL-IA     N1NWH
       warlord at MIT.EDU                        PGP key available