From owner-freebsd-mips@FreeBSD.ORG  Sun Jul 21 18:44:33 2013
Return-Path: <owner-freebsd-mips@FreeBSD.ORG>
Delivered-To: freebsd-mips@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115])
 by hub.freebsd.org (Postfix) with ESMTP id 9DFF027B;
 Sun, 21 Jul 2013 18:44:33 +0000 (UTC)
 (envelope-from adrian.chadd@gmail.com)
Received: from mail-wg0-x233.google.com (mail-wg0-x233.google.com
 [IPv6:2a00:1450:400c:c00::233])
 by mx1.freebsd.org (Postfix) with ESMTP id E29E4D00;
 Sun, 21 Jul 2013 18:44:32 +0000 (UTC)
Received: by mail-wg0-f51.google.com with SMTP id e11so5346552wgh.30
 for <multiple recipients>; Sun, 21 Jul 2013 11:44:32 -0700 (PDT)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113;
 h=mime-version:sender:date:x-google-sender-auth:message-id:subject
 :from:to:content-type;
 bh=Eb13jf3sz1Uoi9eXNJ4ulRrUlCUd/3fpJDIrSVmEkS0=;
 b=0tkK/ikDzVWV0yFxyxXi4liriC5DAaMT3Zh7vo7mLA6jh/QplHrIlEQYtXO+KebbsO
 W8Tt4x/pehRHx9IK7O+p89wNjpBIryGRr+DS+R4kadlhT0Kd84gR31+wI1NCtAkroxQa
 93wbeZjGkbVj0IMLoQ3nY8s239Vgyhp3LVJleY2fMDZ5YnTHzDnoTyiuSykfKWXPytjy
 icRXCvG1/hxpZRDVCEjetFpVEzusi9cEVGDPO8VeUFwfjtkNSe0Dj9sxnqZGnU1jQ33U
 DHZlrmVKoNDHeMaujJMdBLi3mUWFuTSLDKX88eWsgjKELwztPhLcF1Llu1yslFE1VihZ
 aedQ==
MIME-Version: 1.0
X-Received: by 10.180.82.196 with SMTP id k4mr27998801wiy.0.1374432272124;
 Sun, 21 Jul 2013 11:44:32 -0700 (PDT)
Sender: adrian.chadd@gmail.com
Received: by 10.217.94.132 with HTTP; Sun, 21 Jul 2013 11:44:32 -0700 (PDT)
Date: Sun, 21 Jul 2013 11:44:32 -0700
X-Google-Sender-Auth: bLHUKXR_nX8sMtjtUKplT3JA42g
Message-ID: <CAJ-VmonJg2BhBdckFb1O79ZnWrXKZhT+ku9SjuswLui6iZC1Ow@mail.gmail.com>
Subject: Can we undo the octeon hack?
From: Adrian Chadd <adrian@freebsd.org>
To: freebsd-mips@freebsd.org, Warner Losh <imp@freebsd.org>, 
 Juli Mallett <jmallett@freebsd.org>
Content-Type: text/plain; charset=ISO-8859-1
X-BeenThere: freebsd-mips@freebsd.org
X-Mailman-Version: 2.1.14
Precedence: list
List-Id: Porting FreeBSD to MIPS <freebsd-mips.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/options/freebsd-mips>,
 <mailto:freebsd-mips-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-mips>
List-Post: <mailto:freebsd-mips@freebsd.org>
List-Help: <mailto:freebsd-mips-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-mips>,
 <mailto:freebsd-mips-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 21 Jul 2013 18:44:33 -0000

Hi Juli/Warner,

Is it possible to undo this particular hack, and allow these values to
be overridden in the kernel config files?

from kern.pre.mk

CFLAGS= ${COPTFLAGS} ${C_DIALECT} ${DEBUG} ${CWARNFLAGS}
CFLAGS+= ${INCLUDES} -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include
opt_global.h
.if ${COMPILER_TYPE} != "clang"
CFLAGS+= -fno-common -finline-limit=${INLINE_LIMIT}
.if ${MACHINE_CPUARCH} != "mips"
CFLAGS+= --param inline-unit-growth=100
CFLAGS+= --param large-function-growth=1000
.else
# XXX Actually a gross hack just for Octeon because of the Simple Executive.
CFLAGS+= --param inline-unit-growth=10000
CFLAGS+= --param large-function-growth=100000
CFLAGS+= --param max-inline-insns-single=10000
.endif
.endif

I'd like to be able to experiment with different inline settings in
order to try and squeeze kernels down to be smaller.

Thanks!


-adrian