On Fri, Sep 27, 2024 at 09:39:07AM +0200, Christian Schulte wrote: > On 9/26/24 10:43, Stuart Henderson wrote: > > On 2024-09-26, Christian Schulte <c...@schulte.it> wrote: > >> I am keen on knowing how those snapshots are build. Do they really wipe > >> out everything and then do a fresh build - lasting nearly 24h here for > >> me. I doubt it. > > > > That's how I do base+x "make build" and "make release" when I do them. > > > > 24h is a long time. Are you using very slow machines or did you just not > > use -j? > > > > time doas make build > > chown root:wheel /tmp/_etcdir.ajLXZ6LHx1/var/sysmerge/etc.tgz > chmod 644 /tmp/_etcdir.ajLXZ6LHx1/var/sysmerge/etc.tgz > 45014.21 real 32976.78 user 10507.23 sys > > Nearly 13h. Seems the host the guest is running on currently has I/O issues. A > linux guest on the same host also currently has issues. Lots of log messages > like these. > > kernel:[ 460.053622] watchdog: BUG: soft lockup - CPU#5 stuck for 75s! > [kworker/5:0:42] > > Linux needs a reboot after those messages, OpenBSD just successfully ran a > make build. > > make -j does not make a lot of a difference. The disk I/O currently is just > very slow. Has nothing to do with OpenBSD. > > OpenBSD 7.6-current (GENERIC.MP) #12: Thu Sep 26 20:25:45 CEST 2024 > schu...@0x02.schulte.it:/sys/arch/amd64/compile/GENERIC.MP > real mem = 6425518080 (6127MB) > avail mem = 6207578112 (5920MB) > random: good seed from bootblocks > mpath0 at root > scsibus0 at mpath0: 256 targets > mainbus0 at root > bios0 at mainbus0: SMBIOS rev. 2.8 @ 0xf5a10 (10 entries) > bios0: vendor SeaBIOS version "rel-1.16.1-0-g3208b098f51a-prebuilt.qemu.org" > date 04/01/2014 > bios0: QEMU Standard PC (i440FX + PIIX, 1996) ^^^^^^^^^^^^^^^^
You can't expect the build time in a QEMU guest to compare with the one from a "bare metal" machine. Of course it its slower. And I guess the I/O performance will be highly dependent on whatever else the QEMU host is running, and on how it prioritizes things. --