Date: Mon, 22 Nov 2010 18:41:47 -0500 From: Weihang Wang <weihang@vt.edu> To: Dan Nelson <dnelson@allantgroup.com> Cc: freebsd-questions@freebsd.org Subject: Re: Got an error: Unknown option "DDB_CTF" Message-ID: <47405515-D6EF-4B80-B020-0C93987EBA29@vt.edu> In-Reply-To: <20101122213155.GC58734@dan.emsphone.com> References: <CB053608-596F-4326-81AF-1905DDFABBBC@vt.edu> <20101122170806.GA58734@dan.emsphone.com> <B21BB9CA-D6E6-4F80-9021-940BA0B07497@vt.edu> <20101122213155.GC58734@dan.emsphone.com>
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Hi, Thanks again. The transport protocol is not implemented by me, but I = need to run this protocol to see the behavior of this protocol. So now I = have no idea about the implementation of the transport protocol and = don't know whether it could run on later versions than FreeBSD 6.0. I = guess what I could do now is try to see whether this protocol could work = on FreeBSD later version (8.1 or later?? ). If it works, then everything = is fine. If not, maybe I have to find other instrumenting tools instead = of DTrace. Thank you so much. Best, W.Wang On Nov 22, 2010, at 4:31 PM, Dan Nelson wrote: > In the last episode (Nov 22), Weihang Wang said: >> On Nov 22, 2010, at 12:08 PM, Dan Nelson wrote: >>> In the last episode (Nov 22), Weihang Wang said: >>>> I am a totally newbie to FreeBSD. I am building a custom kernel = based >>>> on FreeBSD 6.0 kernel (I have to use this version cause I need to = run >>>> an application which is only available for FreeBSD 6.0). I conform = to >>>> the handbook to add the following lines in kernel configuration = file to >>>> enable DTrace support: >>>>=20 >>>> options KDTRACE_FRAME >>>> options KDTRACE_HOOKS >>>> options DDB_CTF >>>> makeoptions WITH_CTF=3D1 >>>>=20 >>>> Then I use the following commands to recompile my kernel and = install >>>> this new kernel: >>>>=20 >>>> make buildkernel KERNCONF=3DKERNELNAME >>>> make installkernel KERNCONF=3DKERNELNAME >>>>=20 >>>> The compiling process encounters an error: Unknown option = "DDB_CTF", I >>>> have no idea how to fix this? >>>=20 >>> Just remove all references to CTF; that's for Dtrace support, which = doesn't >>> exist in the 6.* branch. >>>=20 >>> You might also want to try running your application on FreeBSD 8.1 = after >>> installing the misc/compat6x package. Backwards binary = compatibility >>> support is very good. >>=20 >> Thank you so much for your help. But I am still concerned about the >> backward compatibility. First I have to use DTrace to instrument the >> kernel to do performance analysis. At the same time, the program I = need >> to build on the FreeBSD is a kind of transport protocol, which is = based on >> the FreeBSD 6.0. The transport protocol may change the network stack = of >> the kernel networking system, so I do not know whether this would = work.=20 >> Hope to hear from you. Thank you very much. >=20 > If your program includes kernel modifications and the modifications = only > apply cleanly to FreeBSD 6, then you may be stuck unless you can port = the > changes to a newer version of FreeBSD. DTrace support for the kernel = went > into FreeBSD 7.1, and DTrace for user processes will be in 9.0 (with > backports to 8.2 and 7.4 later). >=20 > If your program implements its transport protocol completely in = userland (by > opening raw sockets for example), then it will probably run on FreeBSD = 8.1. >=20 > --=20 > Dan Nelson > dnelson@allantgroup.com > _______________________________________________ > freebsd-questions@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-questions > To unsubscribe, send any mail to = "freebsd-questions-unsubscribe@freebsd.org"
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