Date: Mon, 19 Jul 2010 19:45:41 -0700 From: Navdeep Parhar <nparhar@gmail.com> To: Doug Barton <dougb@FreeBSD.org> Cc: Chris Ruiz <yr.retarded@gmail.com>, freebsd-current@freebsd.org Subject: Re: Why is intr taking up so much cpu? Message-ID: <20100720024541.GA25037@itx> In-Reply-To: <alpine.BSF.2.00.1007191931040.1694@qbhto.arg> References: <20100717192128.GM2381@deviant.kiev.zoral.com.ua> <alpine.BSF.2.00.1007180113370.1707@qbhto.arg> <20100718103003.GO2381@deviant.kiev.zoral.com.ua> <4C43541C.3060101@FreeBSD.org> <20100718194109.GU2381@deviant.kiev.zoral.com.ua> <4C435CBE.50500@FreeBSD.org> <20100718202338.GI5485@dan.emsphone.com> <alpine.BSF.2.00.1007191800460.1873@qbhto.arg> <AANLkTimwRV5jSP6z4_Z51RapkVgfTSHVQrVHONWKjA9B@mail.gmail.com> <alpine.BSF.2.00.1007191931040.1694@qbhto.arg>
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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@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. Regards, Navdeep
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