Mercurial > hg > truffle
annotate make/linux/makefiles/adjust-mflags.sh @ 4647:b32ccf2376d2
experimental: scheduling and unscheduling of the whole graph
author | Lukas Stadler <lukas.stadler@jku.at> |
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date | Mon, 20 Feb 2012 14:28:39 +0100 |
parents | c18cbe5936b8 |
children | e8d4d0db1f06 |
rev | line source |
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0 | 1 #! /bin/sh |
2 # | |
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3 # Copyright (c) 1999, 2008, Oracle and/or its affiliates. All rights reserved. |
0 | 4 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
5 # | |
6 # This code is free software; you can redistribute it and/or modify it | |
7 # under the terms of the GNU General Public License version 2 only, as | |
8 # published by the Free Software Foundation. | |
9 # | |
10 # This code is distributed in the hope that it will be useful, but WITHOUT | |
11 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
12 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
13 # version 2 for more details (a copy is included in the LICENSE file that | |
14 # accompanied this code). | |
15 # | |
16 # You should have received a copy of the GNU General Public License version | |
17 # 2 along with this work; if not, write to the Free Software Foundation, | |
18 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
19 # | |
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20 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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21 # or visit www.oracle.com if you need additional information or have any |
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22 # questions. |
0 | 23 # |
24 # | |
25 | |
26 # This script is used only from top.make. | |
27 # The macro $(MFLAGS-adjusted) calls this script to | |
28 # adjust the "-j" arguments to take into account | |
29 # the HOTSPOT_BUILD_JOBS variable. The default | |
30 # handling of the "-j" argument by gnumake does | |
31 # not meet our needs, so we must adjust it ourselves. | |
32 | |
33 # This argument adjustment applies to two recursive | |
34 # calls to "$(MAKE) $(MFLAGS-adjusted)" in top.make. | |
35 # One invokes adlc.make, and the other invokes vm.make. | |
36 # The adjustment propagates the desired concurrency | |
37 # level down to the sub-make (of the adlc or vm). | |
38 # The default behavior of gnumake is to run all | |
39 # sub-makes without concurrency ("-j1"). | |
40 | |
41 # Also, we use a make variable rather than an explicit | |
42 # "-j<N>" argument to control this setting, so that | |
43 # the concurrency setting (which must be tuned separately | |
44 # for each MP system) can be set via an environment variable. | |
45 # The recommended setting is 1.5x to 2x the number of available | |
46 # CPUs on the MP system, which is large enough to keep the CPUs | |
47 # busy (even though some jobs may be I/O bound) but not too large, | |
48 # we may presume, to overflow the system's swap space. | |
49 | |
50 set -eu | |
51 | |
52 default_build_jobs=4 | |
53 | |
54 case $# in | |
55 [12]) true;; | |
56 *) >&2 echo "Usage: $0 ${MFLAGS} ${HOTSPOT_BUILD_JOBS}"; exit 2;; | |
57 esac | |
58 | |
59 MFLAGS=$1 | |
60 HOTSPOT_BUILD_JOBS=${2-} | |
61 | |
62 # Normalize any -jN argument to the form " -j${HBJ}" | |
63 MFLAGS=` | |
64 echo "$MFLAGS" \ | |
65 | sed ' | |
66 s/^-/ -/ | |
67 s/ -\([^ ][^ ]*\)j/ -\1 -j/ | |
68 s/ -j[0-9][0-9]*/ -j/ | |
69 s/ -j\([^ ]\)/ -j -\1/ | |
70 s/ -j/ -j'${HOTSPOT_BUILD_JOBS:-${default_build_jobs}}'/ | |
71 ' ` | |
72 | |
73 case ${HOTSPOT_BUILD_JOBS} in \ | |
74 | |
75 '') case ${MFLAGS} in | |
76 *\ -j*) | |
77 >&2 echo "# Note: -jN is ineffective for setting parallelism in this makefile." | |
78 >&2 echo "# please set HOTSPOT_BUILD_JOBS=${default_build_jobs} in the command line or environment." | |
79 esac;; | |
80 | |
81 ?*) case ${MFLAGS} in | |
82 *\ -j*) true;; | |
83 *) MFLAGS="-j${HOTSPOT_BUILD_JOBS} ${MFLAGS}";; | |
84 esac;; | |
85 esac | |
86 | |
87 echo "${MFLAGS}" |