Times to build just devel/llvm50 via poudriere-devel: Pine64+ 2GB, RPi3, RPi2 V1.1

[Mark Millard]

All the below were: NO_ZFS=yes , USE_TMPFS=no , not using
cccache, PARALLEL_JOBS=1 , ALLOW_MAKE_JOBS=yes . On the
RPi2 V1.1 I also set: MAX_EXECUTION_TIME=432000 ,
NOHANG_TIME=28800 .

Pine64+ 2GB: (so, 2GiBytes of RAM on cortex-a53, eMMC in usdcard slot via adapter)
[05:45:14] [01] [00:00:00] Building devel/llvm50 | llvm50-5.0.0_6
[20:02:56] [01] [14:17:42] Finished devel/llvm50 | llvm50-5.0.0_6: Success

RPi3: (1 GiByte of RAM on cortex-a53, eMMC in usdcard slot via adapter)
[03:43:37] [01] [00:00:00] Building devel/llvm50 | llvm50-5.0.0_6
[22:56:56] [01] [19:13:19] Finished devel/llvm50 | llvm50-5.0.0_6: Success

RPi2 V1.1: (1 GiByte of RAM on cortex-a7, USB SSD Stick on powered hub)
[04:20:51] [01] [00:00:00] Building devel/llvm50 | llvm50-5.0.0_6
[37:40:02] [01] [33:19:11] Finished devel/llvm50 | llvm50-5.0.0_6: Success
(Somewhat under 2 hr 25 min of that in package.)

These were all with default options for devel/llvm50.

eMCC performance notes:
The rpi3 can get between 10 MiByte/s and
12 MiByte/s, while the Pine64+ 2GB can get
between 5 MiBytes/s and 6 MiBytes/s, from
what I have observed.

Swap partition notes:
All 3 had significant swap space configured. The RPi3
and RPi2 needed several hundred MiBytes, I had
configured around 1.5 GiBytes. Building devel/cmake
used more than building devel/llvm50 , at least on
the RPi2: 973 MiBytes was observed in top for
devel/cmake on the RPi2.

poudriere-devel note:
I had adjusted the non-parameterized, hard-coded timeouts
in poudriere's scripts for the RPi2 V1.1 so that, for example,
package would be allowed to finish. MAX_EXECUTION_TIME and
NOHANG_TIME adjustments do not cause some stages to scale the
time allowed.

top note:
I run a modified top that keeps track of and reports
the "maximum observed used" figure for the swap usage.
So that figure is a low bound on the actual maximum
while top was monitoring.

For reference:

# uname -apKU
FreeBSD rpi2 12.0-CURRENT FreeBSD 12.0-CURRENT  r327485M  arm armv7 1200054 1200054

# svnlite info /usr/ports/ | grep "Re[plv]"
Relative URL: ^/head
Repository Root: svn://svn0.us-west.freebsd.org/ports
Repository UUID: 35697150-7ecd-e111-bb59-0022644237b5
Revision: 457579
Last Changed Rev: 457579


===
Mark Millard
markmi at dsl-only.net