Re: Where is the eln search path defined

[Andrea Corallo <akrl@sdf.org>]

Alex Bennée <alex.bennee@linaro.org> writes:

> Andrea Corallo <akrl@sdf.org> writes:
>
>> Alex Bennée <alex.bennee@linaro.org> writes:
>>
>>> Andrea Corallo <akrl@sdf.org> writes:
>>>
>>>> Alex Bennée <alex.bennee@linaro.org> writes:
>>>>
>>>>> Heh - so I patched pdumper to dump the variables at that point and
>>>>> re-built:
>>>>>
>>>>>   dump_do_dump_relocation: installation_state:2  ivoncation_dir:
>>>>>
>>>>> and now the built emacs boots up fine. So I'm guessing there
>>>>> must have been a stale pdumper.o that didn't get built for some reason.
>>>>>
>>>>> Sorry for the noise.
>>>>
>>>> Hi Alex,
>>>>
>>>> no issue.  Is very good somebody tests Aarch64, thanks for that!
>>>
>>> While on that subject is there any sort of benchmarking used to see if a
>>> given arch is generating good code? Certainly on x86 I noticed a
>>> speed-up in gnus but that is more subjective than objective.
>>
>> Hi Alex,
>>
>> I believe so far what we have is this:
>>
>> https://elpa.gnu.org/packages/elisp-benchmarks.html
>>
>> Note that you have to native compile by hand the tests because this
>> package doesn't know about native compilation.
>
> I did C-h f elisp-benchmark-run and navigated to the file and executed
> (native-compile (buffer-file-name)) and waited for it to dump the .eln
> filename. The results don't seem that impressive so I don't know if I
> did something wrong or if libgccjit is just being poor on Aarch64. The
> machine is a TX1 so the individual cores aren't supper powerful anyway
> but I was hoping for better:
>
> * Before Results (byte-compiled)
>
>   | test           | non-gc avg (s) | gc avg (s) | gcs avg | tot avg (s) | tot avg err (s) |
>   |----------------+----------------+------------+---------+-------------+-----------------|
>   | bubble-no-cons |         217.03 |       0.00 |       0 |      217.03 |            2.66 |
>   | bubble         |          91.18 |      53.77 |      68 |      144.95 |            3.37 |
>   | dhrystone      |         289.30 |      85.21 |     106 |      374.51 |            3.80 |
>   | fibn-rec       |         139.91 |       0.00 |       0 |      139.91 |            0.58 |
>   | fibn-tc        |         164.23 |       0.00 |       0 |      164.23 |            4.53 |
>   | fibn           |         189.61 |       0.00 |       0 |      189.61 |            2.42 |
>   | inclist        |         281.67 |       0.00 |       0 |      281.67 |            5.13 |
>   | listlen-tc     |         263.80 |       0.00 |       0 |      263.80 |           10.06 |
>   | nbody          |          70.62 |      92.60 |     114 |      163.23 |            4.30 |
>   | pidigits       |         180.40 |      64.86 |      62 |      245.26 |            3.08 |
>   |----------------+----------------+------------+---------+-------------+-----------------|
>   | total          |        1887.75 |     296.44 |     350 |     2184.19 |           14.67 |
>   |                |                |            |         |             |                 |
>
> * After Results (native-compiled)
>
>   | test           | non-gc avg (s) | gc avg (s) | gcs avg | tot avg (s) | tot avg err (s) |
>   |----------------+----------------+------------+---------+-------------+-----------------|
>   | bubble-no-cons |         206.13 |       0.00 |       0 |      206.13 |            4.67 |
>   | bubble         |          88.84 |      48.20 |      65 |      137.05 |            0.73 |
>   | dhrystone      |         301.94 |      75.30 |     102 |      377.24 |            4.91 |
>   | fibn-rec       |         143.44 |       0.00 |       0 |      143.44 |            3.26 |
>   | fibn-tc        |         165.60 |       0.00 |       0 |      165.60 |            1.99 |
>   | fibn           |         186.95 |       0.00 |       0 |      186.95 |            6.08 |
>   | inclist        |         270.98 |       0.00 |       0 |      270.98 |            1.57 |
>   | listlen-tc     |         248.98 |       0.00 |       0 |      248.98 |            5.37 |
>   | nbody          |          71.46 |      82.83 |     110 |      154.30 |            2.88 |
>   | pidigits       |         192.83 |      61.80 |      59 |      254.63 |            2.56 |
>   |----------------+----------------+------------+---------+-------------+-----------------|
>   | total          |        1877.15 |     268.14 |     336 |     2145.29 |           12.01 |
>
>
> I guess it's time to start looking at the generated code?

Hi Alex,

I suspect for some reason we are looking at two byte compiled runs.  For
One option to verify that is to hack a little the code or other option
is to run this version instead:

https://gitlab.com/koral/elisp-benchmarks

I probably should update the official one to handle native compilation,
haven't done it so far due to lack of time and because native
compilation "officially" does not exists :)

Thanks

  Andrea

-- 
akrl@sdf.org