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Make copy(DArray) copy #9745

Merged
merged 1 commit into from
Jan 13, 2015
Merged

Make copy(DArray) copy #9745

merged 1 commit into from
Jan 13, 2015

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andreasnoack
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Right now copy(DArray) is a noop. I don't see why this is necessary and I'd like to be able to copy my DArrays when passing them to mutating linear algebra functions.

cc: @JeffBezanson

tkelman
tkelman reviewed Jan 12, 2015
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base/darray.jl
@@ -245,7 +245,13 @@ end
getindex(d::DArray) = d[1]
getindex(d::DArray, I::Union(Int,UnitRange{Int})...) = sub(d,I...)

copy(d::SubOrDArray) = d
function copy!(dest::SubOrDArray, src::SubOrDArray)
dest.dims == src.dims && dest.pmap == src.pmap && dest.indexes == src.indexes && dest.cuts == src.cuts || throw(ArgumentError("desination array doens't fit to source array"))
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destination array doesn't

@JeffBezanson
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Having copy actually copy something? That's crazy! :)

andreasnoack added a commit that referenced this pull request Jan 13, 2015
@andreasnoack
Merge pull request #9745 from JuliaLang/anj/darraycopy
42e45a9 
Make copy(DArray) copy
@andreasnoack andreasnoack merged commit 42e45a9 into master Jan 13, 2015
@andreasnoack andreasnoack deleted the anj/darraycopy branch January 13, 2015 17:14
@tkelman
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tkelman commented Jan 14, 2015

Turns out this breaks make testall1.

     * parallel
exception on 2: exception on ERROR: BoundsError: attempt to access 0x0 Array{Float64,2}
  at index [1]
 in getindex at array.jl:260
 in anonymous at multi.jl:1533
 in anonymous at multi.jl:844
 in run_work_thunk at multi.jl:603
 in run_work_thunk at multi.jl:612
 in anonymous at task.jl:6
2: ERROR: BoundsError: attempt to access 0x0 Array{Float64,2}
  at index [1]
 in getindex at array.jl:260
 in anonymous at multi.jl:1533
 in anonymous at multi.jl:844
 in run_work_thunk at multi.jl:603
 in run_work_thunk at multi.jl:612
 in anonymous at task.jl:6
exception on 1: ERROR: LoadError: test error in expression: fetch(@spawnat (workers())[1] (localpart(d))[1] != 0)
TypeError: non-boolean (BoundsError) used in boolean context
 in do_test at test.jl:48
 in runtests at /tmp/julia/share/julia/test/testdefs.jl:5
 in anonymous at multi.jl:642
 in run_work_thunk at multi.jl:603
 in remotecall_fetch at multi.jl:676
 in remotecall_fetch at multi.jl:691
 in anonymous at task.jl:1614
while loading parallel.jl, in expression starting on line 20
ERROR: LoadError: LoadError: test error in expression: fetch(@spawnat (workers())[1] (localpart(d))[1] != 0)
TypeError: non-boolean (BoundsError) used in boolean context
 in do_test at test.jl:48
 in runtests at /tmp/julia/share/julia/test/testdefs.jl:5
 in anonymous at multi.jl:642
 in run_work_thunk at multi.jl:603
 in remotecall_fetch at multi.jl:676
 in remotecall_fetch at multi.jl:691
 in anonymous at task.jl:1614
while loading parallel.jl, in expression starting on line 20
while loading /tmp/julia/share/julia/test/runtests.jl, in expression starting on line 42

@JeffBezanson
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It's a behavior change, not a bug fix.

amitmurthy
amitmurthy reviewed Jan 14, 2015
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test/parallel.jl

@test d == dc # Should be identical
@spawnat workers()[1] localpart(dc)[1] = 0
@test fetch(@spawnat workers()[1] localpart(d)[1] != 0) # but not point to the same memory
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Should be @spawnat id_other localpart(dc)[1] = 0 and @test fetch(@spawnat id_other localpart(d)[1] != 0) ?

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That is probably true. I'll change it.

@andreasnoack
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@tkelman I've pushed the change proposed by @amitmurthy so hopefully we won't see that test fail again.

@andreasnoack
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I was actually awaiting the tests to finish, but now the commit should be there.

@tkelman
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tkelman commented Jan 14, 2015

@andreasnoack sorry I'm impatient, make testall1 does work now

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4 participants
@andreasnoack @JeffBezanson @tkelman @amitmurthy