Date: Mon, 19 Jul 2010 22:25:45 -0500 From: Dan Nelson <dnelson@allantgroup.com> To: Doug Barton <dougb@FreeBSD.org> Cc: Kostik Belousov <kostikbel@gmail.com>, freebsd-current@FreeBSD.org, Rui Paulo <rpaulo@FreeBSD.org> Subject: Re: Why is intr taking up so much cpu? Message-ID: <20100720032545.GM5485@dan.emsphone.com> In-Reply-To: <alpine.BSF.2.00.1007191800460.1873@qbhto.arg> References: <F653FF83-D9CF-42A2-AE9A-B8F914090065@FreeBSD.org> <alpine.BSF.2.00.1007171208010.1538@qbhto.arg> <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>
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In the last episode (Jul 19), Doug Barton said: > 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? I think you also need WITH_CTF=yes , either in your kernel config or directly on the make commandline. The kernel config option should work, but if it doesn't, it's guaranteed to work on the commandline. http://wiki.freebsd.org/DTrace http://lists.freebsd.org/pipermail/freebsd-current/2010-April/016620.html -- Dan Nelson dnelson@allantgroup.com
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