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MKL_NUM_THREADS #11

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akirakyle opened this issue Nov 9, 2023 · 0 comments
Open

MKL_NUM_THREADS #11

akirakyle opened this issue Nov 9, 2023 · 0 comments

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@akirakyle
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I wanted to make sure to also report this bug I described over at SciML/LinearSolve.jl#427 (comment) here so it can be discussed.

I'm not sure what exactly the right behavior should be but currently it seems like I've been running into a bunch of surprises around Distributed with MKL and threading. Ideally whatever the default behavior is for OpenBLAS should also apply to MKL?
JamesWrigley added a commit that referenced this issue Jan 6, 2025
@JamesWrigley
Replace a timeout task with timedwait()
766f8c3 
According to a stacktrace from a hung DistributedNext CI job this task was
causing the process to hang before exiting:
```julia
InterruptException()
_jl_mutex_unlock at C:/workdir/src\threading.c:1012
jl_mutex_unlock at C:/workdir/src\julia_locks.h:80 [inlined]
ijl_task_get_next at C:/workdir/src\scheduler.c:458
poptask at .\task.jl:1163
wait at .\task.jl:1172
task_done_hook at .\task.jl:839
jfptr_task_done_hook_98752.1 at C:\hostedtoolcache\windows\julia\nightly\x64\lib\julia\sys.dll (unknown line)
jl_apply at C:/workdir/src\julia.h:2233 [inlined]
jl_finish_task at C:/workdir/src\task.c:338
start_task at C:/workdir/src\task.c:1274
      From worker 82:	fatal: error thrown and no exception handler available.Unhandled Task ERROR: InterruptException:
Stacktrace:
 [1] poptask(W::Base.IntrusiveLinkedListSynchronized{Task})
   @ Base .\task.jl:1163
 [2] wait()
   @ Base .\task.jl:1172
 [3] wait(c::Base.GenericCondition{ReentrantLock}; first::Bool)
   @ Base .\condition.jl:141
 [4] wait
   @ .\condition.jl:136 [inlined]
 [5] put_buffered(c::Channel{Any}, v::Int64)
   @ Base .\channels.jl:420
 [6] put!(c::Channel{Any}, v::Int64)
   @ Base .\channels.jl:398
 [7] put!(rv::DistributedNext.RemoteValue, args::Int64)
   @ DistributedNext D:\a\DistributedNext.jl\DistributedNext.jl\src\remotecall.jl:703
 [8] (::DistributedNext.var"#create_worker##11#create_worker##12"{DistributedNext.RemoteValue, Float64})()
   @ DistributedNext D:\a\DistributedNext.jl\DistributedNext.jl\src\cluster.jl:721
```

Replaced it with a call to `timedwait()`, which has the advantage of being a lot
simpler than an extra task.
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@akirakyle