From owner-freebsd-arch Mon Feb 18 17:47:45 2002 Delivered-To: freebsd-arch@freebsd.org Received: from duke.cs.duke.edu (duke.cs.duke.edu [152.3.140.1]) by hub.freebsd.org (Postfix) with ESMTP id 16EAA37B400 for ; Mon, 18 Feb 2002 17:47:38 -0800 (PST) Received: from grasshopper.cs.duke.edu (grasshopper.cs.duke.edu [152.3.145.30]) by duke.cs.duke.edu (8.9.3/8.9.3) with ESMTP id UAA21456; Mon, 18 Feb 2002 20:47:37 -0500 (EST) Received: (from gallatin@localhost) by grasshopper.cs.duke.edu (8.11.6/8.9.1) id g1J1l7H44551; Mon, 18 Feb 2002 20:47:07 -0500 (EST) (envelope-from gallatin@cs.duke.edu) From: Andrew Gallatin MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Message-ID: <15473.44699.351070.683358@grasshopper.cs.duke.edu> Date: Mon, 18 Feb 2002 20:47:07 -0500 (EST) To: Julian Elischer Cc: arch@FreeBSD.ORG Subject: Re: timing results for gettimeofday() (without any credential fixes) In-Reply-To: References: <15473.27469.127329.884265@grasshopper.cs.duke.edu> X-Mailer: VM 6.75 under 21.1 (patch 12) "Channel Islands" XEmacs Lucid Sender: owner-freebsd-arch@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Julian Elischer writes: > turn off invariants to get the fast path on syscalls Not on alpha. There's no #ifdef INVARIANTS around the crfree stuff there. There probably should be. Anyway, on alpha a kernel w/INVARIANTS_SUPPORT but w/o INVARIANTS crashes on boot in the first trap: <..> Mounting root from ufs:/dev/da0a da0 at isp0 bus 0 target 1 lun 0 da0: Fixed Direct Access SCSI-2 device da0: 40.000MB/s transfers (20.000MHz, offset 8, 16bit), Tagged Queueing Enabled da0: 2007MB (4110480 512 byte sectors: 255H 63S/T 255C) panic: already have a ucred panic Stopped at Debugger+0x34: zapnot v0,#0xf,a0 db> tr Debugger() at Debugger+0x34 panic() at panic+0x100 trap() at trap+0xa0 XentMM() at XentMM+0x2c --- memory management fault (from ipl 0) --- --- user mode --- db> show pcpu cpuid = 0 curthread = 0xfffffe0009a69820: pid 1 "init" curpcb = 0x829e58 fpcurthread = none idlethread = 0xfffffe0009a692c0: pid 10 "idle" ipis = 0x0 next ASN = 3 db> This may very well be the first trap the process takes. Drew To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-arch" in the body of the message