Re: HoneyComb first-boot notes [buildworld buildkernel timing example for stable/13]

On 2021-Jun-24, at 16:00, Mark Millard <marklmi at yahoo.com> wrote:

> On 2021-Jun-24, at 13:39, Mark Millard <marklmi at yahoo.com> wrote:
> 
>> Repeating here what I've reported on teh solidrun discord:
>> 
>> I decided to experiment with monitoring the temperatures reported
>> as things are. For the default heat-sink/fan and the 2 other fans
>> in the case, buildworld with load average 16.? for some time has
>> stayed with tz0 through tz6 reporting between 61.0degC and 66.0degC,
>> say about 20degC for ambiant. (tz7 and tz8 report 0.1C.) During
>> stages with lower load averages, the tz0..tz6 tempuratures back off
>> some. So it looks like my default context keeps the system
>> sufficiently cool for such use.
>> 
>> I'll note that the default heat-sink's fan is not operating at rates
>> that I hear it upstairs. I've heard the noisy mode from there during
>> early parts of booting for Fedora 34 server, for example.
> 
> So I updated my stable/13 source and built and installed
> the update, then did a rm -fr of the build directory
> tree context and started a from-scratch build. The
> build had:
> 
> SYSTEM_COMPILER: Determined that CC=cc matches the source tree.  Not bootstrapping a cross-compiler.
> and:
> SYSTEM_LINKER: Determined that LD=ld matches the source tree.  Not bootstrapping a cross-linker.
> 
> as is my standard context for doing such "how long does
> it take" buildworld buildkernel testing.
> 
> On aarch64 I do not build for targeting non-arm architectures.
> This does save some time on the builds.

I should have mentioned that my builds are based on tuning
for the cortex-a72 via -mcpu=cortex-a72 being used. This
was also true of the live system that was running, kernel
and world.

> The results for the HoneyComb configuration I'm using:
> 
> World build completed on Thu Jun 24 15:30:11 PDT 2021
> World built in 3173 seconds, ncpu: 16, make -j16
> Kernel build for GENERIC-NODBG-CA72 completed on Thu Jun 24 15:34:45 PDT 2021
> Kernel(s)  GENERIC-NODBG-CA72 built in 274 seconds, ncpu: 16, make -j16
> 
> So World+Kernel took a a little under 1 hr to build (-j16).
> 
> 
> 
> Comparison/contrast to prior aarch64 systems that I've used
> for buildworld buildkernel . . .
> 
> 
> By contrast, the (now failed) OverDrive 1000's last timing
> was (building releng/13 instead of stable/13):
> 
> World build completed on Tue Apr 27 02:50:52 PDT 2021
> World built in 12402 seconds, ncpu: 4, make -j4
> Kernel build for GENERIC-NODBG-CA72 completed on Tue Apr 27 03:08:04 PDT 2021
> Kernel(s)  GENERIC-NODBG-CA72 built in 1033 seconds, ncpu: 4, make -j4
> 
> So World+Kernel took a a little under 3.75 hrs to build (-j4).
> 
> 
> The MACCHIATObin Double Shot's last timing was
> (building a 13-CURRENT):
> 
> World build completed on Tue Jan 19 03:44:59 PST 2021
> World built in 14902 seconds, ncpu: 4, make -j4
> Kernel build for GENERIC-NODBG completed on Tue Jan 19 04:04:25 PST 2021
> Kernel(s)  GENERIC-NODBG built in 1166 seconds, ncpu: 4, make -j4
> 
> So World+Kernel took a little under 4.5 hrs to build (-j4).
> 
> 
> The RPi4B 8GiByte's last timing was
> ( arm_freq=2000, sdram_freq_min=3200, force_turbo=1, USB3 SSD
> building releng/13 ):
> 
> World build completed on Tue Apr 20 14:34:38 PDT 2021
> World built in 22104 seconds, ncpu: 4, make -j4
> Kernel build for GENERIC-NODBG completed on Tue Apr 20 15:03:24 PDT 2021
> Kernel(s)  GENERIC-NODBG built in 1726 seconds, ncpu: 4, make -j4
> 
> So World+Kernel took somewhat under 6 hrs 40 min to build.

The -mcpu=cortex-a72 use note also applies to the OverDrive 1000,
MACCHIATObin Double Shot, and RPi4B 8 GiByte contexts.


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