4 GiByte RPi4 -j4 buildworld buildkernel when booted via https://github.com/pftf/RPi4/releases/tag/v1.16 materials: somewhat under 13 hours

[Mark Millard]

This was using over_voltage=6 and arm_freq=2000 via
config.txt . The environment is (mostly) based on
head -r360311 . EFI/BOOT/BOOTAA64.EFI ( loader.efi )
was more recent. A USB3 Ethernet is in use because
the built-in Ethernet does not show up in FreeBSD.
( /dev/mmcsd0 does not show up either. ) The RPi4
has heatsinks and a fan and was using a 5.1V 3.5A
power supply.

I deleted the prior contents of the build tree first.

. . .
make[1]: "/usr/src/Makefile.inc1" line 323: SYSTEM_COMPILER: Determined that CC=cc matches the source tree.  Not bootstrapping a cross-compiler.
make[1]: "/usr/src/Makefile.inc1" line 328: SYSTEM_LINKER: Determined that LD=ld matches the source tree.  Not bootstrapping a cross-linker.
. . .
>>> World built in 43050 seconds, ncpu: 4, make -j4
. . .
>>> Kernel(s)  GENERIC-NODBG built in 2768 seconds, ncpu: 4, make -j4

So a little under 12 hours for buildworld and somewhat under 50
minutes for buildkernel. So, somewhat under 13 hours overall when
not needing to build a bootstrap compiler or linker. But my
selections of what/how to build are somewhat unusual. For
reference:

# more ~/src.configs/src.conf.cortexA53-clang-bootstrap.aarch64-host 
TO_TYPE=aarch64
#
KERNCONF=GENERIC-NODBG
TARGET=arm64
.if ${.MAKE.LEVEL} == 0
TARGET_ARCH=${TO_TYPE}
.export TARGET_ARCH
.endif
#
WITH_SYSTEM_COMPILER=
WITH_SYSTEM_LINKER=
#
WITH_LIBCPLUSPLUS=
WITHOUT_BINUTILS_BOOTSTRAP=
WITH_ELFTOOLCHAIN_BOOTSTRAP=
#Disables avoiding bootstrap: WITHOUT_LLVM_TARGET_ALL=
WITH_LLVM_TARGET_AARCH64=
WITH_LLVM_TARGET_ARM=
WITHOUT_LLVM_TARGET_MIPS=
WITHOUT_LLVM_TARGET_POWERPC=
WITHOUT_LLVM_TARGET_RISCV=
WITHOUT_LLVM_TARGET_X86=
WITH_CLANG=
WITH_CLANG_IS_CC=
WITH_CLANG_FULL=
WITH_CLANG_EXTRAS=
WITH_LLD=
WITH_LLD_IS_LD=
WITHOUT_BINUTILS=
WITH_LLDB=
#
WITH_BOOT=
WITHOUT_LIB32=
#
#
NO_WERROR=
MALLOC_PRODUCTION=
#
# Avoid stripping but do not control host -g status as well:
DEBUG_FLAGS+=
#
WITH_REPRODUCIBLE_BUILD=
WITH_DEBUG_FILES=
#
# Use of the .clang 's here avoids
# interfering with other C<?>FLAGS
# usage, such as ?= usage.
CFLAGS.clang+= -mcpu=cortex-a53
CXXFLAGS.clang+= -mcpu=cortex-a53
CPPFLAGS.clang+= -mcpu=cortex-a53
ACFLAGS.arm64cpuid.S+=  -mcpu=cortex-a53+crypto
ACFLAGS.aesv8-armx.S+=  -mcpu=cortex-a53+crypto
ACFLAGS.ghashv8-armx.S+=        -mcpu=cortex-a53+crypto

I currently use the same media with a Rock64 and
currently choose to tune for that CortexA53 context
instead of for CortexA72. (Both are -march=armv8-a
and so are compatible.)

For reference, my odd variation of top
reported:

2104Mi MaxObsActive
661004Ki MaxObsWired
2628Mi MaxObs(Act+Wir)

"Obs" is short for "Observed".

===
Mark Millard
marklmi at yahoo.com
( dsl-only.net went
away in early 2018-Mar)