Re: [Bug 5039] high cpu usage (softirq takes 50% all the time)

Re: [Bug 5039] high cpu usage (softirq takes 50% all the time)

[Andrew Morton]

bugme-daemon@kernel-bugs.osdl.org wrote:
>
> http://bugzilla.kernel.org/show_bug.cgi?id=5039
> 

Well this is a depressing saga.  A bunch of people whose machines appear to
be spending 50% CPU time in softirq processing.  Some find that `noapic'
fixes it and some dont.  Some are on x86_64, some are on x86.

I suspect we have multiple bugs here.  It's quite a mess.

Could the reporters please, via a reply-to-all to this email:

a) test 2.6.14.

b) summarise the current status of your bug (what CPU type, what are the
   symptoms, any known workarounds, etc).

c) Generate a kernel profile (see Documentation/basic_profiling.txt)

Generally, let's get a bit of action happening here and see if we can get
these relatively long-standing regressions fixed up, thanks.

Re: [Bug 5039] high cpu usage (softirq takes 50% all the time)

[Arjan van de Ven]

On Sat, 2005-10-29 at 01:09 -0700, Andrew Morton wrote:
> bugme-daemon@kernel-bugs.osdl.org wrote:
> >
> > http://bugzilla.kernel.org/show_bug.cgi?id=5039
> > 
> 
> Well this is a depressing saga.  A bunch of people whose machines appear to
> be spending 50% CPU time in softirq processing.  Some find that `noapic'
> fixes it and some dont.  Some are on x86_64, some are on x86.
> 
> I suspect we have multiple bugs here.  It's quite a mess.
> 
> Could the reporters please, via a reply-to-all to this email:
> 
> a) test 2.6.14.
> 
> b) summarise the current status of your bug (what CPU type, what are the
>    symptoms, any known workarounds, etc).
> 
> c) Generate a kernel profile (see Documentation/basic_profiling.txt)

d) get a /proc/interrupts

to see if there's some screaming irq.. and if so which one