# Using PARTR in Julia 1.2?
**URL:** https://discourse.julialang.org/t/using-partr-in-julia-1-2/25485
**Category:** General Usage
**Created:** [June 20, 2019, 2:50pm UTC](https://discourse.julialang.org/t/using-partr-in-julia-1-2/25485 "2019-06-20T14:50:49Z")
**Posts on this page:** 8
**Page:** 1
### Author:  [@oschulz](https://discourse.julialang.org/u/oschulz)
#### Post date: [June 20, 2019, 2:50pm UTC](https://discourse.julialang.org/t/using-partr-in-julia-1-2/25485/1 "2019-06-20T14:50:49Z")
Hi,
from what I understand, PARTR (resp. parts of what it will become) will be part of Julia 1.2. I’m keen to try it out, if possible, by my attempts at starting tasks within an `@threads` loop have failed, the tasks always seem to run on thread 1.
Does someone have a short PARTR example (assuming it’s indeed part of v1.2-rc1)?
Cheers,
Oliver
---
### Author:  [@PetrKryslUCSD](https://discourse.julialang.org/u/PetrKryslUCSD)
#### Post date: [June 20, 2019, 2:56pm UTC](https://discourse.julialang.org/t/using-partr-in-julia-1-2/25485/2 "2019-06-20T14:56:34Z")
I believe one has to set an environment variable, `export JULIA_NUM_THREADS=2`, or of course any number that fits your machine.
```julia
$ export JULIA_NUM_THREADS=4
PetrKrysl@Spectre MINGW64 ~/Downloads/FinEtools.jl (master)
$ julia
_
_ _ _(_)_ | Documentation: https://docs.julialang.org
(_) | (_) (_) |
_ _ _| |_ __ _ | Type "?" for help, "]?" for Pkg help.
| | | | | | |/ _` | |
| | |_| | | | (_| | | Version 1.3.0-DEV.250 (2019-05-19)
_/ |\ __'_|_|_|\__'_| | Commit ab3ecdfbcb (31 days old master)
|__/ |
julia> versioninfo()
Julia Version 1.3.0-DEV.250
Commit ab3ecdfbcb (2019-05-19 17:49 UTC)
Platform Info:
OS: Windows (x86_64-w64-mingw32)
CPU: Intel(R) Core(TM) i7-8705G CPU @ 3.10GHz
WORD_SIZE: 64
LIBM: libopenlibm
LLVM: libLLVM-6.0.1 (ORCJIT, skylake)
Environment:
JULIA_NUM_THREADS = 4
```
---
### Author:  [@oschulz](https://discourse.julialang.org/u/oschulz)
#### Post date: [June 20, 2019, 3:28pm UTC](https://discourse.julialang.org/t/using-partr-in-julia-1-2/25485/3 "2019-06-20T15:28:39Z")
Sure, I do set `JULIA_NUM_THREADS`, of course, and the `@threads` loop uses them - just the tasks I spawn in there all seem to run on thread one. By maybe I misunderstand how PARTR is supposed to work?
---
### Author:  [@PetrKryslUCSD](https://discourse.julialang.org/u/PetrKryslUCSD)
#### Post date: [June 20, 2019, 3:29pm UTC](https://discourse.julialang.org/t/using-partr-in-julia-1-2/25485/4 "2019-06-20T15:29:52Z")
Is there a MWE?
---
### Author:  [@jebej](https://discourse.julialang.org/u/jebej)
#### Post date: [June 20, 2019, 3:59pm UTC](https://discourse.julialang.org/t/using-partr-in-julia-1-2/25485/5 "2019-06-20T15:59:48Z")
See here:
> [@Julia 1.2 feature freeze April 4th](https://discourse.julialang.org/t/julia-1-2-feature-freeze-april-4th/22478/14):
>
> I see, thanks. Will nested @threads loops work properly (depth first)? Or would that require a new API?
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### Author:  [@oschulz](https://discourse.julialang.org/u/oschulz)
#### Post date: [June 20, 2019, 5:53pm UTC](https://discourse.julialang.org/t/using-partr-in-julia-1-2/25485/6 "2019-06-20T17:53:14Z")
Ah, thanks, that clears thing up regarding `@threads`. So there’s some machinery for PARTR in v1.2, but not enough to use it yet? Or does one use it independently from `@threads`?
---
### Author:  [@jebej](https://discourse.julialang.org/u/jebej)
#### Post date: [June 20, 2019, 6:03pm UTC](https://discourse.julialang.org/t/using-partr-in-julia-1-2/25485/7 "2019-06-20T18:03:49Z")
The machinery is mostly all in place, but for now `@threads` will still use the regular static scheduling.
We don’t know yet if there will be a different syntax to use depth-first scheduling.
For now then, there are pretty much no user-facing changes, which the exception as @jeff.bezanson said that a few more operations (IO and task switches) work inside `@threads`.
Maybe Jeff can give an update in case something changed since April.
---
### Author:  [@oschulz](https://discourse.julialang.org/u/oschulz)
#### Post date: [June 20, 2019, 7:08pm UTC](https://discourse.julialang.org/t/using-partr-in-julia-1-2/25485/8 "2019-06-20T19:08:44Z")
Thanks for the infos! I guess we’ll hear more exiting things in this direction in Baltimore. 🙂