mirror of https://gitlab.com/scemama/qmcchem.git
80 lines
1.4 KiB
OCaml
80 lines
1.4 KiB
OCaml
open Core.Std;;
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type t =
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| Srun
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| MPI
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| Bash
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let to_string = function
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| Srun -> "srun"
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| Bash -> "env"
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| MPI -> Lazy.force Qmcchem_config.mpirun
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(** Find the launcher for the current job scheduler *)
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let find () =
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let result =
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match Scheduler.find () with
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| Scheduler.SLURM -> Srun
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| Scheduler.Batch
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| Scheduler.PBS
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| Scheduler.SGE ->
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if Lazy.force Qmcchem_config.has_mpirun then
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MPI
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else
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Bash
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in
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result
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(** Create a file contaning the list of nodes and the number of available CPUs *)
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let create_nodefile () =
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let launcher =
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find ()
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in
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let launcher_command =
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to_string launcher
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in
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let h =
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Hashtbl.create ~hashable:String.hashable ~size:1000 ()
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in
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let in_channel =
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Unix.open_process_in (launcher_command^" hostname -s")
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in
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In_channel.input_lines in_channel
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|> List.map ~f:String.strip
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|> List.iter ~f:( fun host ->
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Hashtbl.change h host (function
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| Some x -> Some (x+1)
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| None -> Some 1
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)
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);
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match
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Unix.close_process_in in_channel
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with
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| _ -> ();
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let f =
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match launcher with
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| MPI ->
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fun (node, n) ->
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Printf.sprintf "%s slots=%d\n" node n
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| Srun
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| Bash ->
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fun (node, n) ->
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Printf.sprintf "%s %d\n" node n
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in
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Hashtbl.to_alist h
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|> List.map ~f
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|> String.concat
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