| #! /bin/sh |
| # |
| # Copyright (c) 1999, 2008, Oracle and/or its affiliates. All rights reserved. |
| # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| # |
| # This code is free software; you can redistribute it and/or modify it |
| # under the terms of the GNU General Public License version 2 only, as |
| # published by the Free Software Foundation. |
| # |
| # This code is distributed in the hope that it will be useful, but WITHOUT |
| # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| # version 2 for more details (a copy is included in the LICENSE file that |
| # accompanied this code). |
| # |
| # You should have received a copy of the GNU General Public License version |
| # 2 along with this work; if not, write to the Free Software Foundation, |
| # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| # |
| # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| # or visit www.oracle.com if you need additional information or have any |
| # questions. |
| # |
| # |
| |
| # This script is used only from top.make. |
| # The macro $(MFLAGS-adjusted) calls this script to |
| # adjust the "-j" arguments to take into account |
| # the HOTSPOT_BUILD_JOBS variable. The default |
| # handling of the "-j" argument by gnumake does |
| # not meet our needs, so we must adjust it ourselves. |
| |
| # This argument adjustment applies to two recursive |
| # calls to "$(MAKE) $(MFLAGS-adjusted)" in top.make. |
| # One invokes adlc.make, and the other invokes vm.make. |
| # The adjustment propagates the desired concurrency |
| # level down to the sub-make (of the adlc or vm). |
| # The default behavior of gnumake is to run all |
| # sub-makes without concurrency ("-j1"). |
| |
| # Also, we use a make variable rather than an explicit |
| # "-j<N>" argument to control this setting, so that |
| # the concurrency setting (which must be tuned separately |
| # for each MP system) can be set via an environment variable. |
| # The recommended setting is 1.5x to 2x the number of available |
| # CPUs on the MP system, which is large enough to keep the CPUs |
| # busy (even though some jobs may be I/O bound) but not too large, |
| # we may presume, to overflow the system's swap space. |
| |
| set -eu |
| |
| default_build_jobs=4 |
| |
| case $# in |
| [12]) true;; |
| *) >&2 echo "Usage: $0 ${MFLAGS} ${HOTSPOT_BUILD_JOBS}"; exit 2;; |
| esac |
| |
| MFLAGS=$1 |
| HOTSPOT_BUILD_JOBS=${2-} |
| |
| # Normalize any -jN argument to the form " -j${HBJ}" |
| MFLAGS=` |
| echo "$MFLAGS" \ |
| | sed ' |
| s/^-/ -/ |
| s/ -\([^ I][^ I]*\)j/ -\1 -j/ |
| s/ -j[0-9][0-9]*/ -j/ |
| s/ -j\([^ ]\)/ -j -\1/ |
| s/ -j/ -j'${HOTSPOT_BUILD_JOBS:-${default_build_jobs}}'/ |
| ' ` |
| |
| case ${HOTSPOT_BUILD_JOBS} in \ |
| |
| '') case ${MFLAGS} in |
| *\ -j*) |
| >&2 echo "# Note: -jN is ineffective for setting parallelism in this makefile." |
| >&2 echo "# please set HOTSPOT_BUILD_JOBS=${default_build_jobs} in the command line or environment." |
| esac;; |
| |
| ?*) case ${MFLAGS} in |
| *\ -j*) true;; |
| *) MFLAGS="-j${HOTSPOT_BUILD_JOBS} ${MFLAGS}";; |
| esac;; |
| esac |
| |
| echo "${MFLAGS}" |