Relevant julia code under `unknown`

[koehlerson]

Hey there,
thanks for the package! I'm trying to profile some code but I have troubles to get PProf properly running.

I'm on arch with PProf.jl version 2.0.1, graphviz 2.46.0-1 and julia 1.5.3
Whenever I profile something in Julia PProf gathers everything under "unknown" as in this screenshot

MWE would be to copy paste this https://kristofferc.github.io/JuAFEM.jl/dev/examples/hyperelasticity/#Plain-Program or alternatively just copy paste the example from the docs https://docs.julialang.org/en/v1/manual/profile/#Basic-usage

Here is the source view:

[NHDaly]

Hrmm weird! Thanks for the report!

Can you also paste a screenshot for the flamegraph view? It's a bit easier for my brain to see what's going on.

This might just be a benign artifact of the way julia names the root frame on arch? Let's have a look at the flamegraph to see if it helps at all...

[NHDaly]

Also, can you try pasting in the results of Profile.print()? That might show if this is a problem in PProf or something coming from base Julia. :)

[koehlerson]

Here is the output of the flame graph

And this is Profile.print()

julia> Profile.print()
Overhead ╎ [+additional indent] Count File:Line; Function
=========================================================
     ╎6123  /build/julia/src/julia-1.5.3/usr/share/julia/stdlib/v1.5/REPL/src/REPL.jl:288; run_repl(::REPL.AbstractREPL, ::Any)
 5173╎ 6123  @Base/client.jl:457; include(::String)
     ╎  45    none:0; #s16#28(::Any, ::Any, ::Any, ::Any, ::Any, ::Any)
   45╎   45    @SIMD/src/LLVM_intrinsics_old.jl:179; #s16#28
     ╎  5     none:0; #s17#111(::Any, ::Any, ::Any, ::Any, ::Any)
    5╎   5     @SIMD/src/LLVM_intrinsics_old.jl:581; #s17#111
     ╎  12    none:0; #s17#95(::Any, ::Any, ::Any, ::Any, ::Any, ::Any)
   10╎   12    @SIMD/src/LLVM_intrinsics_old.jl:383; #s17#95
    2╎    2     @SIMD/src/LLVM_intrinsics_old.jl:47; llvm_name(::Symbol, ::Int64, ::Type{T} where T)
     ╎  33    none:0; #s21#19(::Any, ::Any, ::Any, ::Any)
     ╎   33    @ForwardDiff/src/partials.jl:177; #s21#19
   33╎    33    @ForwardDiff/src/partials.jl:154; tupexpr(::Function, ::Int64)
     ╎  47    none:0; #s21#31(::Any, ::Any, ::Any, ::Any)
     ╎   47    @ForwardDiff/src/partials.jl:201; #s21#31
   47╎    47    @ForwardDiff/src/partials.jl:154; tupexpr(::Function, ::Int64)
     ╎  34    none:0; #s21#37(::Any, ::Any, ::Any, ::Any)
     ╎   34    @ForwardDiff/src/partials.jl:209; #s21#37
   34╎    34    @ForwardDiff/src/partials.jl:154; tupexpr(::Function, ::Int64)
     ╎  39    none:0; #s21#40(::Any, ::Any, ::Any, ::Any)
     ╎   39    @ForwardDiff/src/partials.jl:213; #s21#40
   39╎    39    @ForwardDiff/src/partials.jl:154; tupexpr(::Function, ::Int64)
     ╎  49    none:0; #s21#43(::Any, ::Any, ::Any)
   12╎   49    @ForwardDiff/src/partials.jl:217; #s21#43
   37╎    37    @ForwardDiff/src/partials.jl:154; tupexpr(::Function, ::Int64)
     ╎  106   none:0; #s21#46(::Any, ::Any, ::Any, ::Any, ::Any, ::Any)
     ╎   106   @ForwardDiff/src/partials.jl:221; #s21#46
  106╎    106   @ForwardDiff/src/partials.jl:154; tupexpr(::Function, ::Int64)
     ╎  53    none:0; #s27#46(::Any, ::Any, ::Any, ::Any, ::Any)
    1╎   1     @Tensors/src/constructors.jl:21; #s27#46
   15╎   52    @Tensors/src/constructors.jl:22; #s27#46
   37╎    37    @Tensors/src/utilities.jl:2; tensor_create_linear(::Type{Tensor{1,3,T,M} where M where T}, ::Function)
     ╎  71    none:0; #s27#65(::Any, ::Any, ::Any, ::Any, ::Any)
    6╎   6     @Tensors/src/constructors.jl:78; #s27#65
    1╎   1     @Tensors/src/constructors.jl:80; #s27#65
   64╎   64    @Tensors/src/constructors.jl:88; #s27#65
     ╎  196   none:0; #s80#132(::Any, ::Any, ::Any)
   14╎   14    @Tensors/src/tensor_products.jl:357; #s80#132
  115╎   122   @Tensors/src/tensor_products.jl:359; #s80#132
     ╎    7     @Tensors/src/utilities.jl:34; reducer(::Array{Expr,1}, ::Array{Expr,1})
     ╎     7     @Tensors/src/utilities.jl:34; reducer(::Array{Expr,1}, ::Array{Expr,1}, ::Bool)
     ╎    ╎ 7     @Tensors/src/utilities.jl:52; remove_duplicates(::Array{Expr,1}, ::Array{Expr,1})
     ╎    ╎  7     @Base/array.jl:1861; findfirst
     ╎    ╎   7     @Base/array.jl:1810; findnext
     ╎    ╎    7     @Base/operators.jl:930; Fix2
     ╎    ╎     7     @Base/operators.jl:123; isequal
     ╎    ╎    ╎ 7     @Base/expr.jl:78; ==
    4╎    ╎    ╎  7     @Base/abstractarray.jl:1841; isequal(::Array{Any,1}, ::Array{Any,1})
     ╎    ╎    ╎   3     @Base/operators.jl:123; isequal(::Expr, ::Expr)
     ╎    ╎    ╎    3     @Base/expr.jl:78; ==
    3╎    ╎    ╎     3     @Base/abstractarray.jl:1841; isequal(::Array{Any,1}, ::Array{Any,1})
   60╎   60    @Tensors/src/tensor_products.jl:361; #s80#132
     ╎  8     none:0; #s80#148(::Any, ::Any, ::Any)
    4╎   8     @Tensors/src/math_ops.jl:97; #s80#148
    4╎    4     @Tensors/src/math_ops.jl:87; (::Tensors.var"#idx#149"{UnionAll})(::Int64, ::Int64)
     ╎  78    none:0; #s80#156(::Any, ::Any, ::Any)
    4╎   9     @Tensors/src/math_ops.jl:314; #s80#156
    5╎    5     @Tensors/src/math_ops.jl:313; (::Tensors.var"#idx#158"{DataType})(::Int64, ::Int64)
   21╎   69    @Tensors/src/math_ops.jl:315; #s80#156
     ╎    48    @Base/reducedim.jl:359; reduce(::Function, ::Array{Expr,1})
     ╎     48    @Base/reducedim.jl:359; #reduce#622
     ╎    ╎ 48    @Base/reducedim.jl:310; mapreduce
   15╎    ╎  48    @Base/reducedim.jl:310; #mapreduce#620
   33╎    ╎   33    @Base/reducedim.jl:318; _mapreduce_dim(::Function, ::Function, ::NamedTuple{(),Tuple{}}, ::Array{Expr,1}, ::Colon)
     ╎  28    none:0; #s80#164(::Any, ::Any, ::Any, ::Any, ::Any, ::Any)
   28╎   28    @Tensors/src/simd.jl:53; #s80#164
     ╎  35    none:0; #s80#167(::Any, ::Any, ::Any, ::Any, ::Any, ::Any)
   35╎   35    @Tensors/src/simd.jl:59; #s80#167
     ╎  83    none:0; #s80#170(::Any, ::Any, ::Any, ::Any, ::Any, ::Any, ::Any)
   78╎   83    @Tensors/src/simd.jl:66; #s80#170
    5╎    5     @Base/iterators.jl:910; product(::UnitRange{Int64}, ::Vararg{UnitRange{Int64},N} where N)
     ╎  28    none:0; #s80#176(::Any, ::Any, ::Any, ::Any, ::Any, ::Any, ::Type{T} where T, ::Any)
   28╎   28    @Tensors/src/simd.jl:83; #s80#176
Total snapshots: 25980

[NHDaly]

Ah, whoops - shoot, to get the right thing to compare, we need Profile.print(C=true), since those Unknown frames look like they're probably C frames.

Sorry and thanks!
thanks for your thorough responses! ❤️

[koehlerson]

profile-output.txt
its a lot, so I created a txt, because my browser didn't respond everytime I tried to paste it :D

no worries, I have to thank you for caring about my problem 👍

[NHDaly]

Aha - so in that view, we do see [unknown stackframe] show up quite a bit.

     ╎    ╎    ╎    ╎    ╎    ╎    ╎    ╎ +21 2     ...oducts.jl:79; #s72#111
     ╎    ╎    ╎    ╎    ╎    ╎    ╎    ╎ +22 2     [unknown stackframe]
     ╎    ╎    ╎    ╎    ╎    ╎    ╎    ╎ +23 2     ...lities.jl:34; reducer(::Array...
     ╎    ╎    ╎    ╎    ╎    ╎    ╎    ╎ +24 2     ...lities.jl:52; remove_duplicat...
     ╎    ╎    ╎    ╎    ╎    ╎    ╎    ╎ +25 2     .../array.jl:1861; findfirst
     ╎    ╎    ╎    ╎    ╎    ╎    ╎    ╎ +26 2     .../array.jl:1810; findnext
     ╎    ╎    ╎    ╎    ╎    ╎    ╎    ╎ +27 2     ...rators.jl:930; Fix2
     ╎    ╎    ╎    ╎    ╎    ╎    ╎    ╎ +28 2     ...rators.jl:123; isequal
     ╎    ╎    ╎    ╎    ╎    ╎    ╎    ╎ +29 2     ...e/expr.jl:78; ==
     ╎    ╎    ╎    ╎    ╎    ╎    ╎    ╎ +30 1     ...tarray.jl:1841; isequal(::Array...
     ╎    ╎    ╎    ╎    ╎    ╎    ╎    ╎ +31 1     [unknown stackframe]
     ╎    ╎    ╎    ╎    ╎    ╎    ╎    ╎ +32 1     ...rators.jl:123; isequal(::Expr,...
     ╎    ╎    ╎    ╎    ╎    ╎    ╎    ╎ +33 1     ...e/expr.jl:78; ==
     ╎    ╎    ╎    ╎    ╎    ╎    ╎    ╎ +34 1     ...tarray.jl:1841; isequal(::Array...
     ╎    ╎    ╎    ╎    ╎    ╎    ╎    ╎ +35 1     [unknown stackframe]
     ╎    ╎    ╎    ╎    ╎    ╎    ╎    ╎ +36 1     ...rators.jl:123; isequal(::Expr,...
     ╎    ╎    ╎    ╎    ╎    ╎    ╎    ╎ +37 1     ...e/expr.jl:78; ==
     ╎    ╎    ╎    ╎    ╎    ╎    ╎    ╎ +38 1     ...tarray.jl:1841; isequal(::Array...
    1╎    ╎    ╎    ╎    ╎    ╎    ╎    ╎ +39 1     ...ulia.so.1:?; jl_apply_generic
     ╎    ╎    ╎    ╎    ╎    ╎    ╎    ╎ +30 1     [unknown stackframe]

I'm not sure if that's the same thing that's being displayed as <unknown> in PProf?

@vchuravy: do you know?

---

Although actually, after looking through the text file some more.. i think maybe the <unknown> frames correspond to the frames in Profile that don't have a name at all? Like these:

     ╎ 7302  ...in/../lib/libc.so.6:?; __libc_start_main
     ╎  7302  julia:?; 
     ╎   7302  julia:?; 
     ╎    7302  /usr/lib/julia/sys.so:?; 
     ╎     7302  .../lib/julia/sys.so:?; 
     ╎    ╎ 7302  .../lib/julia/sys.so:?; 
     ╎    ╎  7302  .../lib/julia/sys.so:?; 
     ╎    ╎   7302  ...lib/julia/sys.so:?; 
     ╎    ╎    7302  ...ib/libjulia.so.1:?; jl_load_rewrite
     ╎    ╎     7302  ...b/libjulia.so.1:?; 
     ╎    ╎    ╎ 7302  ...b/libjulia.so.1:?; 
     ╎    ╎    ╎  7302  ...b/libjulia.so.1:?; 
     ╎    ╎    ╎   7302  .../libjulia.so.1:?; 
     ╎    ╎    ╎    7302  .../libjulia.so.1:?; 
     ╎    ╎    ╎     7302  ...libjulia.so.1:?; 
     ╎    ╎    ╎    ╎ 7302  ...libjulia.so.1:?; 
     ╎    ╎    ╎    ╎  7302  ...libjulia.so.1:?; 
     ╎    ╎    ╎    ╎   7302  ...ibjulia.so.1:?; jl_apply_generic

which seems to more or less correspond to the screenshot you posted?:

[NHDaly]

ANYWAY, the simplest answer I have for you is that you can "hide" the frame, by typing <unknown> into the search box (without hitting enter), and then clicking REFINE => hide. Or you can manually add ?h=<unknown> to the URL which should also work. :)

It's annoying but that will clean up your profile! Hope that helps :)

[koehlerson]

Thanks for the suggestion, but it didn't work for me. I tried both, but the "unknown" node is still there. Anyhow, this is not really my problem. If I search for "solve", "assemble_element!", "assemble_global!", i.e. the functions that matter in this example: https://kristofferc.github.io/JuAFEM.jl/dev/examples/hyperelasticity/#Plain-Program I get no match. All I did is @profile in front of solve() and calling pprof() afterwards

But maybe it's related to Profile.jl, I'm not sure tbh