Date: Tue, 28 Aug 2007 12:48:13 +0800 From: Ganbold <ganbold@micom.mng.net> To: Kostik Belousov <kostikbel@gmail.com> Cc: "freebsd-current@freebsd.org" <freebsd-current@freebsd.org>, Robert Watson <rwatson@freebsd.org> Subject: Re: computer becomes slow when compiling something Message-ID: <46D3A90D.8050703@micom.mng.net> In-Reply-To: <20070828044133.GR2332@deviant.kiev.zoral.com.ua> References: <46D25242.10504@micom.mng.net> <20070827231419.H30469@fledge.watson.org> <20070828044133.GR2332@deviant.kiev.zoral.com.ua>
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Kostik Belousov wrote: > On Mon, Aug 27, 2007 at 11:14:58PM +0100, Robert Watson wrote: > >> On Mon, 27 Aug 2007, Ganbold wrote: >> >> >>> I'm running FreeBSD 7.0-CURRENT with SCHED_ULE, INVARIANTS, WITNESS >>> enabled kernel. >>> >> Try the same thing again without INVARIANTS and WITNESS, both of which can >> consume a lot of CPU in kernel on a very active system, especially if lots >> of vnodes are being allocated and freed. Especially WITNESS. >> > > It does happens on the kernels without debug options, in particular, > WITNESS and INVARIANTS. > > It happens when a lot of short-lived processes are rapidly created. > Compilation is a good example of such workload; running configure script > is even better. > What would be a solution to this kind of problems? thanks, Ganbold -- That's the thing about people who think they hate computers. What they really hate is lousy programmers. -- Larry Niven and Jerry Pournelle in "Oath of Fealty"
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