Why is intr taking up so much cpu?
nparhar at gmail.com
Tue Jul 20 02:45:49 UTC 2010
On Mon, Jul 19, 2010 at 07:33:01PM -0700, Doug Barton wrote:
> On Mon, 19 Jul 2010, Chris Ruiz wrote:
> >On Mon, Jul 19, 2010 at 8:03 PM, Doug Barton <dougb at freebsd.org> wrote:
> >>I added options KDTRACE_HOOKS to my kernel config, built a new kernel, and
> >>rebooted. I decided to try your script before things went sideways so I'd
> >>have an idea of what to expect, and it didn't work:
> >>dtrace: failed to initialize dtrace: DTrace device not available on system
> >>Is there something else I need to do to enable it?
> >You need to build the kernel with CTF. Try adding "makeoptions
> >WITH_CTF=yes" to your config and rebuilding your kernel. There's a
> >blurb in src/UPDATING about other ways to accomplish the same thing.
> Thanks for the suggestion, but no improvement. Doing:
> strings /boot/kernel/kernel | grep -i dtrace
> Shows lots of dtrace-related entries, unlike previous kernels built
> without the KDTRACE_HOOKS option, but same error with Dan's script.
Try a "kldload dtraceall" before running the script.
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