9160419c7a
ccache is mostly beneficial for frequent builds where -DNO_CLEAN is not
used to achieve a safe pseudo-incremental build. This is explained in
more detail upstream [1] [2]. It incurs about a 20%-28% hit to populate the
cache, but with a full cache saves 30-50% in build times. When combined with
the WITH_FAST_DEPEND feature it saves up to 65% since ccache does cache the
resulting dependency file, which it does not do when using mkdep(1)/'CC
-E'. Stats are provided at the end of this message.
This removes the need to modify /etc/make.conf with the CC:= and CXX:=
lines which conflicted with external compiler support [3] (causing the
bootstrap compiler to not be built which lead to obscure failures [4]),
incorrectly invoked ccache in various stages, required CCACHE_CPP2 to avoid
Clang errors with parenthesis, and did not work with META_MODE.
The option name was picked to match the existing option in ports. This
feature is available for both in-src and out-of-src builds that use
/usr/share/mk.
Linking, assembly compiles, and pre-processing avoid using ccache since it is
only overhead. ccache does nothing special in these modes, although there is
no harm in calling it for them.
CCACHE_COMPILERCHECK is set to 'content' when using the in-tree bootstrap
compiler to hash the content of the compiler binary to determine if it
should be a cache miss. For external compilers the 'mtime' option is used
as it is more efficient and likely to be correct. Future work may optimize the
'content' check using the same checks as whether a bootstrap compiler is needed
to be built.
The CCACHE_CPP2 pessimization is currently default in our devel/ccache
port due to Clang requiring it. Clang's -Wparentheses-equality,
-Wtautological-compare, and -Wself-assign warnings do not mix well with
compiling already-pre-processed code that may have expanded macros that
trigger the warnings. GCC has so far not had this issue so it is allowed to
disable the CCACHE_CPP2 default in our port.
Sharing a cache between multiple checkouts, or systems, is explained in
the ccache manual. Sharing a cache over NFS would likely not be worth
it, but syncing cache directories between systems may be useful for an
organization. There is also a memcached backend available [5]. Due to using
an object directory outside of the source directory though you will need to
ensure that both are in the same prefix and all users use the same layout. A
possible working layout is as follows:
Source: /some/prefix/src1
Source: /some/prefix/src2
Source: /some/prefix/src3
Objdir: /some/prefix/obj
Environment: CCACHE_BASEDIR='${SRCTOP:H}' MAKEOBJDIRPREFIX='${SRCTOP:H}/obj'
This will use src*/../obj as the MAKEOBJDIRPREFIX and tells ccache to replace
all absolute paths to be relative. Using something like this is required due
to -I and -o flags containing both SRC and OBJDIR absolute paths that ccache
adds into its hash for the object without CCACHE_BASEDIR.
distcc can be hooked into by setting CCACHE_PREFIX=/usr/local/bin/distcc.
I have not personally tested this and assume it will not mix well with
using the bootstrap compiler.
The cache from buildworld can be reused in a subdir by first running
'make buildenv' (from r290424).
Note that the cache is currently different depending on whether -j is
used or not due to ccache enabling -fdiagnostics-color automatically if
stderr is a TTY, which bmake only does if not using -j.
The system I used for testing was:
WITNESS
Build options: -j20 WITH_LLDB=yes WITH_DEBUG_FILES=yes WITH_CCACHE_BUILD=yes
DISK: ZFS 3-way mirror with very slow disks using SSD l2arc/log.
The arc was fully populated with src tree files and ccache objects.
RAM: 76GiB
CPU: Intel(R) Xeon(R) CPU L5520 @2.27GHz
2 package(s) x 4 core(s) x 2 SMT threads = hw.ncpu=16
The WITH_FAST_DEPEND feature was used for comparison here as well to show
the dramatic time savings with a full cache.
buildworld:
x buildworld-before
+ buildworld-ccache-empty
* buildworld-ccache-full
% buildworld-ccache-full-fastdep
# buildworld-fastdep
+-------------------------------------------------------------------------------+
|% * # +|
|% * # +|
|% * # xxx +|
| |A |
| A|
| A |
|A |
| A |
+-------------------------------------------------------------------------------+
N Min Max Median Avg Stddev
x 3 3744.13 3794.31 3752.25 3763.5633 26.935139
+ 3 4519 4525.04 4520.73 4521.59 3.1104823
Difference at 95.0% confidence
758.027 +/- 43.4565
20.1412% +/- 1.15466%
(Student's t, pooled s = 19.1726)
* 3 1823.08 1827.2 1825.62 1825.3 2.0785572
Difference at 95.0% confidence
-1938.26 +/- 43.298
-51.5007% +/- 1.15045%
(Student's t, pooled s = 19.1026)
% 3 1266.96 1279.37 1270.47 1272.2667 6.3971113
Difference at 95.0% confidence
-2491.3 +/- 44.3704
-66.1952% +/- 1.17895%
(Student's t, pooled s = 19.5758)
# 3 3153.34 3155.16 3154.2 3154.2333 0.91045776
Difference at 95.0% confidence
-609.33 +/- 43.1943
-16.1902% +/- 1.1477%
(Student's t, pooled s = 19.0569)
buildkernel:
x buildkernel-before
+ buildkernel-ccache-empty
* buildkernel-ccache-empty-fastdep
% buildkernel-ccache-full
# buildkernel-ccache-full-fastdep
@ buildkernel-fastdep
+-------------------------------------------------------------------------------+
|# @ % * |
|# @ % * x + |
|# @ % * xx ++|
| MA |
| MA|
| A |
| A |
|A |
| A |
+-------------------------------------------------------------------------------+
N Min Max Median Avg Stddev
x 3 571.57 573.94 571.79 572.43333 1.3094401
+ 3 727.97 731.91 728.06 729.31333 2.2492295
Difference at 95.0% confidence
156.88 +/- 4.17129
27.4058% +/- 0.728695%
(Student's t, pooled s = 1.84034)
* 3 527.1 528.29 528.08 527.82333 0.63516402
Difference at 95.0% confidence
-44.61 +/- 2.33254
-7.79305% +/- 0.407478%
(Student's t, pooled s = 1.02909)
% 3 400.4 401.05 400.62 400.69 0.3306055
Difference at 95.0% confidence
-171.743 +/- 2.16453
-30.0023% +/- 0.378128%
(Student's t, pooled s = 0.954969)
# 3 201.94 203.34 202.28 202.52 0.73020545
Difference at 95.0% confidence
-369.913 +/- 2.40293
-64.6212% +/- 0.419774%
(Student's t, pooled s = 1.06015)
@ 3 369.12 370.57 369.3 369.66333 0.79033748
Difference at 95.0% confidence
-202.77 +/- 2.45131
-35.4225% +/- 0.428227%
(Student's t, pooled s = 1.0815)
[1] https://ccache.samba.org/performance.html
[2] http://www.mail-archive.com/ccache@lists.samba.org/msg00576.html
[3] https://reviews.freebsd.org/D3484
[5] https://github.com/jrosdahl/ccache/pull/30
PR: 182944 [4]
MFC after: 3 weeks
Sponsored by: EMC / Isilon Storage Division
Relnotes: yes
262 lines
9.0 KiB
Makefile
262 lines
9.0 KiB
Makefile
# $FreeBSD$
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# Part of a unified Makefile for building kernels. This part contains all
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# of the definitions that need to be before %BEFORE_DEPEND.
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# Allow user to configure things that only effect src tree builds.
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# Note: This is duplicated from src.sys.mk to ensure that we include
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# /etc/src.conf when building the kernel. Kernels can be built without
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# the rest of /usr/src, but they still always process SRCCONF even though
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# the normal mechanisms to prevent that (compiling out of tree) won't
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# work. To ensure they do work, we have to duplicate thee few lines here.
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SRCCONF?= /etc/src.conf
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.if (exists(${SRCCONF}) || ${SRCCONF} != "/etc/src.conf") && !target(_srcconf_included_)
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.include "${SRCCONF}"
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_srcconf_included_:
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.endif
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.include <bsd.own.mk>
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.include <bsd.compiler.mk>
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.include "kern.opts.mk"
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# Can be overridden by makeoptions or /etc/make.conf
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KERNEL_KO?= kernel
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KERNEL?= kernel
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KODIR?= /boot/${KERNEL}
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LDSCRIPT_NAME?= ldscript.$M
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LDSCRIPT?= $S/conf/${LDSCRIPT_NAME}
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M= ${MACHINE}
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AWK?= awk
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CP?= cp
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LINT?= lint
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NM?= nm
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OBJCOPY?= objcopy
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SIZE?= size
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.if defined(DEBUG)
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_MINUS_O= -O
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CTFFLAGS+= -g
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.else
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.if ${MACHINE_CPUARCH} == "powerpc"
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_MINUS_O= -O # gcc miscompiles some code at -O2
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.else
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_MINUS_O= -O2
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.endif
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.endif
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.if ${MACHINE_CPUARCH} == "amd64"
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.if ${COMPILER_TYPE} == "clang"
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COPTFLAGS?=-O2 -pipe
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.else
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COPTFLAGS?=-O2 -frename-registers -pipe
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.endif
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.else
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COPTFLAGS?=${_MINUS_O} -pipe
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.endif
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.if !empty(COPTFLAGS:M-O[23s]) && empty(COPTFLAGS:M-fno-strict-aliasing)
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COPTFLAGS+= -fno-strict-aliasing
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.endif
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.if !defined(NO_CPU_COPTFLAGS)
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COPTFLAGS+= ${_CPUCFLAGS}
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.endif
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NOSTDINC= -nostdinc
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INCLUDES= ${NOSTDINC} ${INCLMAGIC} -I. -I$S
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.if make(depend) || make(kernel-depend)
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# This hack lets us use the ipfilter code without spamming a new
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# include path into contrib'ed source files.
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INCLUDES+= -I$S/contrib/ipfilter
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# ... and the same for ath
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INCLUDES+= -I$S/dev/ath -I$S/dev/ath/ath_hal -I$S/contrib/dev/ath/ath_hal
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# ... and the same for the NgATM stuff
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INCLUDES+= -I$S/contrib/ngatm
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# ... and the same for vchiq
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INCLUDES+= -I$S/contrib/vchiq
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# ... and the same for twa
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INCLUDES+= -I$S/dev/twa
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# ... and the same for cxgb and cxgbe
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INCLUDES+= -I$S/dev/cxgb -I$S/dev/cxgbe
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.endif
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CFLAGS= ${COPTFLAGS} ${DEBUG}
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CFLAGS+= ${INCLUDES} -D_KERNEL -DHAVE_KERNEL_OPTION_HEADERS -include opt_global.h
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CFLAGS_PARAM_INLINE_UNIT_GROWTH?=100
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CFLAGS_PARAM_LARGE_FUNCTION_GROWTH?=1000
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.if ${MACHINE_CPUARCH} == "mips"
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CFLAGS_ARCH_PARAMS?=--param max-inline-insns-single=1000
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.endif
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CFLAGS.gcc+= -fno-common -fms-extensions -finline-limit=${INLINE_LIMIT}
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CFLAGS.gcc+= --param inline-unit-growth=${CFLAGS_PARAM_INLINE_UNIT_GROWTH}
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CFLAGS.gcc+= --param large-function-growth=${CFLAGS_PARAM_LARGE_FUNCTION_GROWTH}
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.if defined(CFLAGS_ARCH_PARAMS)
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CFLAGS.gcc+=${CFLAGS_ARCH_PARAMS}
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.endif
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WERROR?= -Werror
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# XXX LOCORE means "don't declare C stuff" not "for locore.s".
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ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${CFLAGS} ${ASM_CFLAGS.${.IMPSRC:T}}
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.if defined(PROFLEVEL) && ${PROFLEVEL} >= 1
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CFLAGS+= -DGPROF
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CFLAGS.gcc+= -falign-functions=16
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.if ${PROFLEVEL} >= 2
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CFLAGS+= -DGPROF4 -DGUPROF
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PROF= -pg
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.if ${COMPILER_TYPE} == "gcc"
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PROF+= -mprofiler-epilogue
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.endif
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.else
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PROF= -pg
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.endif
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.endif
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DEFINED_PROF= ${PROF}
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# Put configuration-specific C flags last (except for ${PROF}) so that they
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# can override the others.
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CFLAGS+= ${CONF_CFLAGS}
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# Optional linting. This can be overridden in /etc/make.conf.
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LINTFLAGS= ${LINTOBJKERNFLAGS}
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NORMAL_C= ${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
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NORMAL_S= ${CC:N${CCACHE_BIN}} -c ${ASM_CFLAGS} ${WERROR} ${.IMPSRC}
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PROFILE_C= ${CC} -c ${CFLAGS} ${WERROR} ${.IMPSRC}
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NORMAL_C_NOWERROR= ${CC} -c ${CFLAGS} ${PROF} ${.IMPSRC}
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NORMAL_M= ${AWK} -f $S/tools/makeobjops.awk ${.IMPSRC} -c ; \
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${CC} -c ${CFLAGS} ${WERROR} ${PROF} ${.PREFIX}.c
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NORMAL_FW= uudecode -o ${.TARGET} ${.ALLSRC}
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NORMAL_FWO= ${LD} -b binary --no-warn-mismatch -d -warn-common -r \
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-o ${.TARGET} ${.ALLSRC:M*.fw}
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# Common for dtrace / zfs
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CDDL_CFLAGS= -DFREEBSD_NAMECACHE -nostdinc -I$S/cddl/compat/opensolaris -I$S/cddl/contrib/opensolaris/uts/common -I$S -I$S/cddl/contrib/opensolaris/common ${CFLAGS} -Wno-unknown-pragmas -Wno-missing-prototypes -Wno-undef -Wno-strict-prototypes -Wno-cast-qual -Wno-parentheses -Wno-redundant-decls -Wno-missing-braces -Wno-uninitialized -Wno-unused -Wno-inline -Wno-switch -Wno-pointer-arith -Wno-unknown-pragmas
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CDDL_CFLAGS+= -include $S/cddl/compat/opensolaris/sys/debug_compat.h
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CDDL_C= ${CC} -c ${CDDL_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
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# Special flags for managing the compat compiles for ZFS
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ZFS_CFLAGS= -DBUILDING_ZFS -I$S/cddl/contrib/opensolaris/uts/common/fs/zfs -I$S/cddl/contrib/opensolaris/uts/common/zmod -I$S/cddl/contrib/opensolaris/common/zfs ${CDDL_CFLAGS}
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ZFS_ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${ZFS_CFLAGS}
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ZFS_C= ${CC} -c ${ZFS_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
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ZFS_S= ${CC} -c ${ZFS_ASM_CFLAGS} ${WERROR} ${.IMPSRC}
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# Special flags for managing the compat compiles for DTrace
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DTRACE_CFLAGS= -DBUILDING_DTRACE ${CDDL_CFLAGS} -I$S/cddl/dev/dtrace -I$S/cddl/dev/dtrace/${MACHINE_CPUARCH}
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.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
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DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/uts/intel -I$S/cddl/dev/dtrace/x86
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.endif
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DTRACE_CFLAGS+= -I$S/cddl/contrib/opensolaris/common/util -I$S -DDIS_MEM -DSMP
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DTRACE_ASM_CFLAGS= -x assembler-with-cpp -DLOCORE ${DTRACE_CFLAGS}
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DTRACE_C= ${CC} -c ${DTRACE_CFLAGS} ${CDDL_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
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DTRACE_S= ${CC} -c ${DTRACE_ASM_CFLAGS} ${CDDL_CFLAGS} ${WERROR} ${.IMPSRC}
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# Special flags for managing the compat compiles for DTrace/FBT
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FBT_CFLAGS= -DBUILDING_DTRACE -nostdinc -I$S/cddl/dev/fbt/${MACHINE_CPUARCH} -I$S/cddl/dev/fbt -I$S/cddl/compat/opensolaris -I$S/cddl/contrib/opensolaris/uts/common -I$S ${CDDL_CFLAGS}
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.if ${MACHINE_CPUARCH} == "amd64" || ${MACHINE_CPUARCH} == "i386"
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FBT_CFLAGS+= -I$S/cddl/dev/fbt/x86
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.endif
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FBT_C= ${CC} -c ${FBT_CFLAGS} ${CDDL_CFLAGS} ${WERROR} ${PROF} ${.IMPSRC}
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.if ${MK_CTF} != "no"
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NORMAL_CTFCONVERT= ${CTFCONVERT} ${CTFFLAGS} ${.TARGET}
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.elif ${MAKE_VERSION} >= 5201111300
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NORMAL_CTFCONVERT=
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.else
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NORMAL_CTFCONVERT= @:
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.endif
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NORMAL_LINT= ${LINT} ${LINTFLAGS} ${CFLAGS:M-[DIU]*} ${.IMPSRC}
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# Linux Kernel Programming Interface C-flags
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LINUXKPI_INCLUDES= -I$S/compat/linuxkpi/common/include
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LINUXKPI_C= ${NORMAL_C} ${LINUXKPI_INCLUDES}
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# Infiniband C flags. Correct include paths and omit errors that linux
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# does not honor.
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OFEDINCLUDES= -I$S/ofed/include ${LINUXKPI_INCLUDES}
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OFEDNOERR= -Wno-cast-qual -Wno-pointer-arith
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OFEDCFLAGS= ${CFLAGS:N-I*} ${OFEDINCLUDES} ${CFLAGS:M-I*} ${OFEDNOERR}
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OFED_C_NOIMP= ${CC} -c -o ${.TARGET} ${OFEDCFLAGS} ${WERROR} ${PROF}
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OFED_C= ${OFED_C_NOIMP} ${.IMPSRC}
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GEN_CFILES= $S/$M/$M/genassym.c ${MFILES:T:S/.m$/.c/}
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SYSTEM_CFILES= config.c env.c hints.c vnode_if.c
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SYSTEM_DEP= Makefile ${SYSTEM_OBJS}
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SYSTEM_OBJS= locore.o ${MDOBJS} ${OBJS}
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SYSTEM_OBJS+= ${SYSTEM_CFILES:.c=.o}
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SYSTEM_OBJS+= hack.So
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.if ${MFS_IMAGE:Uno} != "no"
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SYSTEM_OBJS+= embedfs_${MFS_IMAGE:T:R}.o
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.endif
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SYSTEM_LD= @${LD} -Bdynamic -T ${LDSCRIPT} ${_LDFLAGS} --no-warn-mismatch \
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--warn-common --export-dynamic --dynamic-linker /red/herring \
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-o ${.TARGET} -X ${SYSTEM_OBJS} vers.o
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SYSTEM_LD_TAIL= @${OBJCOPY} --strip-symbol gcc2_compiled. ${.TARGET} ; \
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${SIZE} ${.TARGET} ; chmod 755 ${.TARGET}
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SYSTEM_DEP+= ${LDSCRIPT}
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# Calculate path for .m files early, if needed.
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.if !defined(_MPATH)
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__MPATH!=find ${S:tA}/ -name \*_if.m
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_MPATH=${__MPATH:H:O:u}
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.endif
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# MKMODULESENV is set here so that port makefiles can augment
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# them.
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MKMODULESENV+= MAKEOBJDIRPREFIX=${.OBJDIR}/modules KMODDIR=${KODIR}
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MKMODULESENV+= MACHINE_CPUARCH=${MACHINE_CPUARCH}
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MKMODULESENV+= MACHINE=${MACHINE} MACHINE_ARCH=${MACHINE_ARCH}
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MKMODULESENV+= MODULES_EXTRA="${MODULES_EXTRA}" WITHOUT_MODULES="${WITHOUT_MODULES}"
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.if (${KERN_IDENT} == LINT)
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MKMODULESENV+= ALL_MODULES=LINT
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.endif
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.if defined(MODULES_OVERRIDE)
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MKMODULESENV+= MODULES_OVERRIDE="${MODULES_OVERRIDE}"
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.endif
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.if defined(DEBUG)
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MKMODULESENV+= DEBUG_FLAGS="${DEBUG}"
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.endif
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MKMODULESENV+= _MPATH="${_MPATH}"
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# Architecture and output format arguments for objdump to convert image to
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# object file
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.if ${MFS_IMAGE:Uno} != "no"
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.if !defined(EMBEDFS_FORMAT.${MACHINE_ARCH})
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EMBEDFS_FORMAT.${MACHINE_ARCH}!= awk -F'"' '/OUTPUT_FORMAT/ {print $$2}' ${LDSCRIPT}
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.if empty(EMBEDFS_FORMAT.${MACHINE_ARCH})
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.undef EMBEDFS_FORMAT.${MACHINE_ARCH}
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.endif
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.endif
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.if !defined(EMBEDFS_ARCH.${MACHINE_ARCH})
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EMBEDFS_ARCH.${MACHINE_ARCH}!= sed -n '/OUTPUT_ARCH/s/.*(\(.*\)).*/\1/p' ${LDSCRIPT}
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.if empty(EMBEDFS_ARCH.${MACHINE_ARCH})
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.undef EMBEDFS_ARCH.${MACHINE_ARCH}
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.endif
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.endif
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EMBEDFS_FORMAT.arm?= elf32-littlearm
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EMBEDFS_FORMAT.armv6?= elf32-littlearm
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EMBEDFS_FORMAT.mips?= elf32-tradbigmips
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EMBEDFS_FORMAT.mipsel?= elf32-tradlittlemips
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EMBEDFS_FORMAT.mips64?= elf64-tradbigmips
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EMBEDFS_FORMAT.mips64el?= elf64-tradlittlemips
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.endif
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# Detect kernel config options that force stack frames to be turned on.
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DDB_ENABLED!= grep DDB opt_ddb.h || true ; echo
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DTR_ENABLED!= grep KDTRACE_FRAME opt_kdtrace.h || true ; echo
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HWPMC_ENABLED!= grep HWPMC opt_hwpmc_hooks.h || true ; echo
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