bug#63986: Julia is very slow

[Efraim Flashner <efraim@flashner.co.il>]

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On Wed, Sep 20, 2023 at 05:57:30PM +0200, Simon Tournier wrote:
> Hi Efraim,
> 
> Applying the patch is done in v3 of #66030.
> 
>     https://issues.guix.gnu.org/issue/66030
> 
> and QA processed all.
> 
>     https://qa.guix.gnu.org/issue/66030/
> 
> It is almost good except one strong annoyance [1]@
> 
> --8<---------------cut here---------------start------------->8---
> Singular value decomposition |   57     57  5.0s
> Hermitian: Error During Test at /gnu/store/zkx6p7kz3m5k5w5iy0l1d09b2n8b0ib3-julia-genericlinearalgebra-0.2.5/share/julia/loadpath/GenericLinearAlgebra/test/rectfullpacked.jl:12
>   Got exception outside of a @test
>   could not load symbol "dsfrk_64_":
>   /gnu/store/h5mgc7ar7a05f9rwrd1makhzays5wd3s-julia-1.8.3/bin/../lib/julia/liblapack.so: undefined symbol: dsfrk_64_
>   Stacktrace:
>     [1] sfrk!(transr::Char, uplo::Char, trans::Char, alpha::Float64, A::Matrix{Float64}, beta::Float64, C::Vector{Float64})
>       @ GenericLinearAlgebra.LAPACK2 /gnu/store/zkx6p7kz3m5k5w5iy0l1d09b2n8b0ib3-julia-genericlinearalgebra-0.2.5/share/julia/loadpath/GenericLinearAlgebra/src/lapack.jl:523
>     [2] Ac_mul_A_RFP(A::Matrix{Float64}, uplo::Symbol)
>       @ GenericLinearAlgebra /gnu/store/zkx6p7kz3m5k5w5iy0l1d09b2n8b0ib3-julia-genericlinearalgebra-0.2.5/share/julia/loadpath/GenericLinearAlgebra/src/rectfullpacked.jl:77
>     [3] macro expansion
>       @ /gnu/store/zkx6p7kz3m5k5w5iy0l1d09b2n8b0ib3-julia-genericlinearalgebra-0.2.5/share/julia/loadpath/GenericLinearAlgebra/test/rectfullpacked.jl:13 [inlined]
>     [4] macro expansion
>       @ /gnu/store/h5mgc7ar7a05f9rwrd1makhzays5wd3s-julia-1.8.3/share/julia/stdlib/v1.8/Test/src/Test.jl:1360 [inlined]
>     [5] macro expansion
>       @ /gnu/store/zkx6p7kz3m5k5w5iy0l1d09b2n8b0ib3-julia-genericlinearalgebra-0.2.5/share/julia/loadpath/GenericLinearAlgebra/test/rectfullpacked.jl:13 [inlined]
>     [6] macro expansion
>       @ /gnu/store/h5mgc7ar7a05f9rwrd1makhzays5wd3s-julia-1.8.3/share/julia/stdlib/v1.8/Test/src/Test.jl:1436 [inlined]
>     [7] macro expansion
>       @ /gnu/store/zkx6p7kz3m5k5w5iy0l1d09b2n8b0ib3-julia-genericlinearalgebra-0.2.5/share/julia/loadpath/GenericLinearAlgebra/test/rectfullpacked.jl:7 [inlined]
>     [8] macro expansion
>       @ /gnu/store/h5mgc7ar7a05f9rwrd1makhzays5wd3s-julia-1.8.3/share/julia/stdlib/v1.8/Test/src/Test.jl:1360 [inlined]
>     [9] top-level scope
>       @ /gnu/store/zkx6p7kz3m5k5w5iy0l1d09b2n8b0ib3-julia-genericlinearalgebra-0.2.5/share/julia/loadpath/GenericLinearAlgebra/test/rectfullpacked.jl:7
>    [10] include(fname::String)
>       @ Base.MainInclude ./client.jl:476
>    [11] top-level scope
>       @ /gnu/store/zkx6p7kz3m5k5w5iy0l1d09b2n8b0ib3-julia-genericlinearalgebra-0.2.5/share/julia/loadpath/GenericLinearAlgebra/test/runtests.jl:10
>    [12] include(mod::Module, _path::String)
>       @ Base ./Base.jl:419
>    [13] exec_options(opts::Base.JLOptions)
>       @ Base ./client.jl:303
>    [14] _start()
>       @ Base ./client.jl:522
> --8<---------------cut here---------------end--------------->8---
> 
> Any idea?  I have no idea and it is blocking the merge because ~20
> packages are then broken.  Well, if we have no idea, I will push the fix
> for “Julia is slow” and we will fix later these ~20 failures.  WDYT?

This one was easy, I just upgraded it to 0.3.0. Then I had to adjust
julia-bandedmatrices and julia-arraylayouts and everything looks good.
Except for julia-optim.

I spent a few hours trying to get Julia to use accept '64' instead of
'64_' for SYMBOLSUFFIX and even packaged a newer version of lapack but I
wasn't able to force the issue. Ultimately any other  julia packages
need to use libblastrampoline to determine whether to use openblas or
lapack.

Patches pushed, issue closed. I even tested the original reproducer from
the first email.

-- 
Efraim Flashner   <efraim@flashner.co.il>   רנשלפ םירפא
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