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add Event; use it to fix race in Distributed setup #29623

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merged 2 commits into from
Oct 19, 2018

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JeffBezanson
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This fixes the Distributed test failure in #22631 with partr enabled. See #22631 (comment) --- we were relying on scheduling order to make sure a setup message is sent first.

In my mind, an "event" is something that happens at a point in time, while a "condition" is something that can persist for a while. But as far as I can tell common terminology reverses them, and an event is level-triggered while a condition is edge-triggered. Go figure.

@JeffBezanson JeffBezanson added parallelism Parallel or distributed computation multithreading Base.Threads and related functionality labels Oct 13, 2018
@StefanKarpinski
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In my mind, an "event" is something that happens at a point in time, while a "condition" is something that can persist for a while. But as far as I can tell common terminology reverses them, and an event is level-triggered while a condition is edge-triggered. Go figure.

Would it be too disruptive/confusing for us to use the terminology in a saner way than is conventional?

@JeffBezanson
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Would it be too disruptive/confusing for us to use the terminology in a saner way than is conventional?

Unfortunately, probably yes. AFAICT every systems book and API out there uses these terms.

@StefanKarpinski
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Sigh. This is why we can’t have nice things.

@JeffBezanson
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Ah, reset is taken and means something else. What should we call it? unsignal? unnotify?

@StefanKarpinski
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cancel?

@JeffBezanson
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Also seems to be common to call the paired operations set and clear.

@JeffBezanson
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Ok, for now I will leave out clear/reset since I don't actually need it yet.

@JeffBezanson JeffBezanson merged commit f6344d3 into master Oct 19, 2018
@JeffBezanson JeffBezanson deleted the jb/syncdistributed branch October 19, 2018 20:42
fredrikekre added a commit that referenced this pull request Nov 30, 2018
fredrikekre added a commit that referenced this pull request Nov 30, 2018
fredrikekre added a commit that referenced this pull request Dec 1, 2018
fredrikekre added a commit that referenced this pull request Dec 1, 2018
fredrikekre added a commit that referenced this pull request Dec 3, 2018
fredrikekre added a commit that referenced this pull request Dec 4, 2018
fredrikekre added a commit that referenced this pull request Dec 4, 2018
fredrikekre added a commit that referenced this pull request Dec 5, 2018
changes between Julia 1.0 and 1.1, including:

- Custom .css-style for compat admonitions.

- Information about compat annotations to CONTRIBUTING.md.

- NEWS.md entry for PRs #30090, #30035, #30022, #29978,
  #29969, #29858, #29845, #29754, #29638, #29636, #29615,
  #29600, #29506, #29469, #29316, #29259, #29178, #29153,
  #29033, #28902, #28761, #28745, #28708, #28696, #29997,
  #28790, #29092, #29108, #29782

- Compat annotation for PRs #30090, #30013, #29978,
  #29890, #29858, #29827, #29754, #29679, #29636, #29623,
  #29600, #29440, #29316, #29259, #29178, #29157, #29153,
  #29033, #28902, #28878, #28761, #28708, #28156, #29733,
  #29670, #29997, #28790, #29092, #29108, #29782, #25278

- Documentation for broadcasting CartesianIndices (#30230).
- Documentation for Base.julia_cmd().
- Documentation for colon constructor of CartesianIndices (#29440).
- Documentation for ^(::Matrix, ::Number) and ^(::Number, ::Matrix).

- Run NEWS-update.jl.

Co-authored-by: Morten Piibeleht <[email protected]>
Co-authored-by: Fredrik Ekre <[email protected]>
fredrikekre added a commit that referenced this pull request Dec 5, 2018
changes between Julia 1.0 and 1.1, including:

- Custom .css-style for compat admonitions.

- Information about compat annotations to CONTRIBUTING.md.

- NEWS.md entry for PRs #30090, #30035, #30022, #29978,
  #29969, #29858, #29845, #29754, #29638, #29636, #29615,
  #29600, #29506, #29469, #29316, #29259, #29178, #29153,
  #29033, #28902, #28761, #28745, #28708, #28696, #29997,
  #28790, #29092, #29108, #29782

- Compat annotation for PRs #30090, #30013, #29978,
  #29890, #29858, #29827, #29754, #29679, #29636, #29623,
  #29600, #29440, #29316, #29259, #29178, #29157, #29153,
  #29033, #28902, #28878, #28761, #28708, #28156, #29733,
  #29670, #29997, #28790, #29092, #29108, #29782, #25278

- Documentation for broadcasting CartesianIndices (#30230).
- Documentation for Base.julia_cmd().
- Documentation for colon constructor of CartesianIndices (#29440).
- Documentation for ^(::Matrix, ::Number) and ^(::Number, ::Matrix).

- Run NEWS-update.jl.

Co-authored-by: Morten Piibeleht <[email protected]>
Co-authored-by: Fredrik Ekre <[email protected]>
fredrikekre added a commit that referenced this pull request Dec 5, 2018
Addition of NEWS and compat admonitions for important changes between Julia 1.0 and 1.1, including:

- Custom .css-style for compat admonitions.

- Information about compat annotations to CONTRIBUTING.md.

- NEWS.md entry for PRs #30090, #30035, #30022, #29978,
  #29969, #29858, #29845, #29754, #29638, #29636, #29615,
  #29600, #29506, #29469, #29316, #29259, #29178, #29153,
  #29033, #28902, #28761, #28745, #28708, #28696, #29997,
  #28790, #29092, #29108, #29782

- Compat annotation for PRs #30090, #30013, #29978,
  #29890, #29858, #29827, #29754, #29679, #29636, #29623,
  #29600, #29440, #29316, #29259, #29178, #29157, #29153,
  #29033, #28902, #28878, #28761, #28708, #28156, #29733,
  #29670, #29997, #28790, #29092, #29108, #29782, #25278

- Documentation for broadcasting CartesianIndices (#30230).
- Documentation for Base.julia_cmd().
- Documentation for colon constructor of CartesianIndices (#29440).
- Documentation for ^(::Matrix, ::Number) and ^(::Number, ::Matrix).

- Run NEWS-update.jl.


Co-authored-by: Morten Piibeleht <[email protected]>
Co-authored-by: Fredrik Ekre <[email protected]>
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