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Significantly speed up mkimg_test

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It turns out that the majority of the test time for the mkimg tests isn't
mkimg itself but rather the use of jot and hexdump which can be quite slow
on emulated platforms such as QEMU.

On QEMU-RISC-V this reduces the time for `kyua test mkimg_test` from 655
seconds to 200. And for CheriBSD on QEMU-CHERI this saves 4-5 hours (25%
of the time for the entire testsuite!) since jot ends up triggering slow
functions inside the QEMU emulation a lot.

Reviewed By:	lwhsu
Differential Revision: https://reviews.freebsd.org/D26796
This commit is contained in:
Alex Richardson 2020-10-18 18:35:23 +00:00
parent d061adc48d
commit 3ac62888fc
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=366815
3 changed files with 21 additions and 3 deletions
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2
Makefile.inc1
View file

@ -2342,6 +2342,8 @@ _other_bootstrap_tools+=tools/build/cross-build/fake_chflags
.endif
# mkfifo is used by sys/conf/newvers.sh
_basic_bootstrap_tools+=usr.bin/mkfifo
# jot is needed for the mkimg tests
_basic_bootstrap_tools+=usr.bin/jot
.if ${MK_BOOT} != "no"
# md5 is used by boot/beri (and possibly others)

20
usr.bin/mkimg/tests/Makefile
View file

@ -15,9 +15,25 @@ $f: $f.hex
sed -e '/^#.*/D' < ${.ALLSRC} > ${.TARGET}
.endfor
# Note: Pre-generating this test file saves a lot of time when building on
# emulated platforms such as QEMU. It can take about 2-5 seconds to generate
# the test file using jot (depending on the emulated architecture) and this
# is done for each of the 168 test configurations.
# The effect is even more pronounced on CHERI-RISCV QEMU (emulating CHERI inside
# QEMU adds additional run-time overhead): Running the apm_1x1_512_raw without
# the pre-generated file takes about 108 seconds of which 102 seconds (over 95%)
# were spent running jot -b. It's even worse on CHERI-MIPS QEMU: 187 seconds
# for jot -b P 2097152 > /dev/null. By using a pre-generated 4MB file, the
# slowest test variant (vtoc8_63x255_4096_vhdx) now only takes 29 seconds (of
# which 26s are spent in hexdump -C) instead of previously 2min30s.
${PACKAGE}FILES+= partition_data_4M.bin
partition_data_4M.bin: Makefile
jot -b P 2097152 > ${.TARGET} || rm -f ${.TARGET}
CLEANFILES+= ${${PACKAGE}FILES}}
rebase: .PHONY
(cd ${.CURDIR}; /usr/libexec/atf-sh ${_REBASE_SCRIPT}.sh rebase)
rebase: partition_data_4M.bin ${_REBASE_SCRIPT} .PHONY
cd ${.CURDIR}; PATH=${.OBJDIR}/..:$${PATH}:/usr/bin:/bin \
/usr/libexec/atf-sh ${.OBJDIR}/${_REBASE_SCRIPT} -s ${.OBJDIR} rebase
.include <bsd.test.mk>

2
usr.bin/mkimg/tests/mkimg_test.sh
View file

@ -56,7 +56,7 @@ makeimage()
if test -z "$partarg"; then
local swap ufs
swap="-p freebsd-swap::128K"
ufs="-p freebsd-ufs:=`mkcontents P 4194304`"
ufs="-p freebsd-ufs:=$(atf_get_srcdir)/partition_data_4M.bin"
partarg="$ufs $swap"
fi