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Use Graphviz_jll #71

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1 change: 1 addition & 0 deletions Project.toml
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Original file line number Diff line number Diff line change
Expand Up @@ -7,6 +7,7 @@ version = "2.2.2"
AbstractTrees = "1520ce14-60c1-5f80-bbc7-55ef81b5835c"
EnumX = "4e289a0a-7415-4d19-859d-a7e5c4648b56"
FlameGraphs = "08572546-2f56-4bcf-ba4e-bab62c3a3f89"
Graphviz_jll = "3c863552-8265-54e4-a6dc-903eb78fde85"
Libdl = "8f399da3-3557-5675-b5ff-fb832c97cbdb"
OrderedCollections = "bac558e1-5e72-5ebc-8fee-abe8a469f55d"
Profile = "9abbd945-dff8-562f-b5e8-e1ebf5ef1b79"
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4 changes: 0 additions & 4 deletions README.md
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Expand Up @@ -20,10 +20,6 @@ This prints a link to a local webserver where you can inspect the profile you've

For more usage examples see the pprof docs: https://github.com/google/pprof/blob/master/doc/README.md

## Dependencies
- [Graphviz](https://www.graphviz.org/)
- In order to use pprof's web graph view (which is one of the best parts of pprof), you need to have graphviz installed. Click the above link to install.

## Usage
```julia
help?> pprof
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5 changes: 4 additions & 1 deletion src/PProf.jl
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Expand Up @@ -6,6 +6,7 @@ using Profile
using ProtoBuf
using OrderedCollections
import pprof_jll
import Graphviz_jll

using Profile: clear

Expand Down Expand Up @@ -326,7 +327,9 @@ function refresh(; webhost::AbstractString = "localhost",
relative_percentages_flag = ui_relative_percentages ? "-relative_percentages" : ""

proc[] = pprof_jll.pprof() do pprof_path
open(pipeline(`$pprof_path -http=$webhost:$webport $relative_percentages_flag $file`))
Graphviz_jll.dot() do dot_path
open(pipeline(`$pprof_path -http=$webhost:$webport $relative_percentages_flag $file`))
end
end
Comment on lines 329 to 333
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Since this package requires Julia v1.6, you could use the recommended thread-safe syntax

run(`$(mungify_exe()) $arguments`)

instead of

mungify_exe() do exe
    run(`$exe $arguments`)
end

but I don't understand what this is doing: dot_path isn't used. Is it used only to merge the environments?

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Yeah we just need to instead dot into the path, since it is going to be called by pprof

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Bit convoluted, but can do something like

pprof = addenv(pprof_jll.pprof(), Graphviz_jll.JLLWrappers.LIBPATH_env=>Graphviz_jll.LIBPATH[], "PATH"=>Graphviz_jll.PATH[])
open(pipeline(`$pprof -http=$webhost:$webport $relative_percentages_flag $file`))

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It is not enough to just modify PATH, because shared libs used by dot must also be found.

I did the change the way I did it because it was the easiest and quickest way for me to achieve what I needed. I was not aware of the new syntax. I simply extended what was there (in particular it seems to me that any thread safety issues are already present and not just introduced by this PR?)

the patch by @giordano seems interesting, but I don't understand it right now -- e.g. shouldn't the "LIBPATH" and PATH content be merged with what is already there instead of overriding it? Or perhaps this is somehow done automatically? This may be obvious to you, but sadly not me :-/.

As it is, I don't have the time and energy to understand and figure all this out, then test it again etc. So if you want it to use that method I think it makes more sense if someone else (@giordano?) opens a PR with it. Feel free to close this PR then!

In the meantime, this patch allowed me to use PProf.jl and that in turn allowed me to tune some code substantially using the Memory Allocation Profiler. Thanks !!!

end

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