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54ff5d7323
all the SUBDIR entries in parallel, instead of serially. Apply this
option to a selected number of Makefiles, which can greatly speed up the
build on multi-core machines, when using make -j.
This can be extended to more Makefiles later on, whenever they are
verified to work correctly with parallel building.
I tested this on a 24-core machine, with make -j48 buildworld (N = 6):
before stddev after stddev
======= ====== ======= ======
real time 1741.1 16.5 959.8 2.7
user time 12468.7 16.4 14393.0 16.8
sys time 1825.0 54.8 2110.6 22.8
(user+sys)/real 8.2 17.1
E.g. the build was approximately 45% faster in real time. On machines
with less cores, or with lower -j settings, the speedup will not be as
impressive. But at least you can now almost max out a machine with
buildworld!
Submitted by: jilles
MFC after: 2 weeks
132 lines
1.5 KiB
Makefile
132 lines
1.5 KiB
Makefile
# @(#)Makefile 8.5 (Berkeley) 3/31/94
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# $FreeBSD$
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.include <bsd.own.mk>
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# XXX MISSING: icheck ncheck
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SUBDIR=adjkerntz \
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badsect \
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camcontrol \
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ccdconfig \
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clri \
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comcontrol \
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conscontrol \
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ddb \
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devfs \
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dhclient \
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dmesg \
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dump \
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dumpfs \
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dumpon \
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etherswitchcfg \
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ffsinfo \
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fsck \
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fsck_ffs \
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fsck_msdosfs \
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fsdb \
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fsirand \
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gbde \
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geom \
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ggate \
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growfs \
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gvinum \
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hastctl \
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hastd \
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ifconfig \
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init \
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iscontrol \
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kldconfig \
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kldload \
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kldstat \
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kldunload \
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ldconfig \
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md5 \
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mdconfig \
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mdmfs \
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mknod \
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mksnap_ffs \
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mount \
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mount_cd9660 \
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mount_fusefs \
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mount_msdosfs \
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mount_nfs \
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mount_nullfs \
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mount_udf \
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mount_unionfs \
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newfs \
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newfs_msdos \
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nfsiod \
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nos-tun \
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ping \
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rcorder \
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reboot \
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recoverdisk \
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resolvconf \
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restore \
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route \
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savecore \
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setkey \
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shutdown \
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spppcontrol \
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swapon \
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sysctl \
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tunefs \
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umount
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.if ${MK_ATM} != "no"
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SUBDIR+= atm
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.endif
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.if ${MK_CASPER} != "no"
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SUBDIR+= casperd
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.endif
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.if ${MK_CXX} != "no"
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SUBDIR+= devd
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.endif
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.if ${MK_IPFILTER} != "no"
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SUBDIR+= ipf
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.endif
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.if ${MK_IPFW} != "no"
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SUBDIR+= ipfw
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SUBDIR+= natd
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.endif
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.if ${MK_NAND} != "no"
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SUBDIR+= nandfs
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SUBDIR+= newfs_nandfs
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.endif
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.if ${MK_PF} != "no"
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SUBDIR+= pfctl
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SUBDIR+= pflogd
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.endif
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.if ${MK_INET6} != "no"
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SUBDIR+= ping6
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SUBDIR+= rtsol
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.endif
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.if ${MK_QUOTAS} != "no"
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SUBDIR+= quotacheck
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.endif
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.if ${MK_ROUTED} != "no"
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SUBDIR+= routed
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.endif
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.if ${MK_TESTS} != "no"
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SUBDIR+= tests
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.endif
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.include <bsd.arch.inc.mk>
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SUBDIR:= ${SUBDIR:O}
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SUBDIR_PARALLEL=
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.include <bsd.subdir.mk>
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