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306 lines
8.8 KiB
OCaml
306 lines
8.8 KiB
OCaml
(** Two electron integral functor for operators that are not separable among %{ $(x,y,z)$ %}.
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It is parameterized by the [zero_m] function.
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*)
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open Constants
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let cutoff = integrals_cutoff
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module Bs = Basis
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module Cs = ContractedShell
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module Csp = ContractedShellPair
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module Cspc = ContractedShellPairCouple
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module Fis = FourIdxStorage
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module type Zero_mType =
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sig
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val name : string
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val zero_m : Zero_m_parameters.t -> float array
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end
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module Make(Zero_m : Zero_mType) = struct
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include FourIdxStorage
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let zero_m = Zero_m.zero_m
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let class_of_contracted_shell_pair_couple shell_pair_couple =
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let shell_p = Cspc.shell_pair_p shell_pair_couple
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and shell_q = Cspc.shell_pair_q shell_pair_couple
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in
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if Array.length (Csp.shell_pairs shell_p) +
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(Array.length (Csp.shell_pairs shell_q)) < 4 then
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TwoElectronRR.contracted_class_shell_pair_couple
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~zero_m shell_pair_couple
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else
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TwoElectronRRVectorized.contracted_class_shell_pairs
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~zero_m shell_p shell_q
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let filter_contracted_shell_pairs ?(cutoff=integrals_cutoff) shell_pairs =
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List.map (fun pair ->
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match Cspc.make ~cutoff pair pair with
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| Some cspc ->
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let cls = class_of_contracted_shell_pair_couple cspc in
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(pair, Zmap.fold (fun key value accu -> max (abs_float value) accu) cls 0. )
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(* TODO \sum_k |coef_k * integral_k| *)
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| None -> (pair, -1.)
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) shell_pairs
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|> List.filter (fun (_, schwartz_p_max) -> schwartz_p_max >= cutoff)
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|> List.map fst
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(* TODO
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let filter_contracted_shell_pair_couples
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?(cutoff=integrals_cutoff) shell_pair_couples =
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List.map (fun pair ->
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let cls =
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class_of_contracted_shell_pairs pair pair
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in
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(pair, Zmap.fold (fun key value accu -> max (abs_float value) accu) cls 0. )
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) shell_pairs
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|> List.filter (fun (_, schwartz_p_max) -> schwartz_p_max >= cutoff)
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|> List.map fst
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*)
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let store_class ?(cutoff=integrals_cutoff) data contracted_shell_pair_couple cls =
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let to_powers x =
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let open Zkey in
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match to_powers x with
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| Three x -> x
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| _ -> assert false
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in
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let shell_p = Cspc.shell_pair_p contracted_shell_pair_couple
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and shell_q = Cspc.shell_pair_q contracted_shell_pair_couple
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in
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Array.iteri (fun i_c powers_i ->
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let i_c = Cs.index (Csp.shell_a shell_p) + i_c + 1 in
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let xi = to_powers powers_i in
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Array.iteri (fun j_c powers_j ->
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let j_c = Cs.index (Csp.shell_b shell_p) + j_c + 1 in
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let xj = to_powers powers_j in
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Array.iteri (fun k_c powers_k ->
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let k_c = Cs.index (Csp.shell_a shell_q) + k_c + 1 in
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let xk = to_powers powers_k in
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Array.iteri (fun l_c powers_l ->
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let l_c = Cs.index (Csp.shell_b shell_q) + l_c + 1 in
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let xl = to_powers powers_l in
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let key = Zkey.of_powers_twelve xi xj xk xl in
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let value = Zmap.find cls key in
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set_chem data i_c j_c k_c l_c value
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) (Cs.zkey_array (Csp.shell_b shell_q))
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) (Cs.zkey_array (Csp.shell_a shell_q))
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) (Cs.zkey_array (Csp.shell_b shell_p))
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) (Cs.zkey_array (Csp.shell_a shell_p))
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let of_basis_serial basis =
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let n = Bs.size basis
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and shell = Bs.contracted_shells basis
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in
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let eri_array =
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Fis.create ~size:n `Dense
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(*
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Fis.create ~size:n `Sparse
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*)
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in
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let t0 = Unix.gettimeofday () in
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let shell_pairs =
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Csp.of_contracted_shell_array shell
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|> filter_contracted_shell_pairs ~cutoff
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in
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Printf.printf "%d significant shell pairs computed in %f seconds\n"
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(List.length shell_pairs) (Unix.gettimeofday () -. t0);
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let t0 = Unix.gettimeofday () in
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let ishell = ref 0 in
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List.iter (fun shell_p ->
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let () =
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if (Cs.index (Csp.shell_a shell_p) > !ishell) then
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(ishell := Cs.index (Csp.shell_a shell_p) ; print_int !ishell ; print_newline ())
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in
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let sp =
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Csp.shell_pairs shell_p
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in
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try
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List.iter (fun shell_q ->
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let () =
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if Cs.index (Csp.shell_a shell_q) >
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Cs.index (Csp.shell_a shell_p) then
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raise Exit
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in
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let sq = Csp.shell_pairs shell_q in
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let cspc =
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if Array.length sp < Array.length sq then
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Cspc.make ~cutoff shell_p shell_q
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else
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Cspc.make ~cutoff shell_q shell_p
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in
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match cspc with
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| Some cspc ->
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let cls =
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class_of_contracted_shell_pair_couple cspc
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in
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store_class ~cutoff eri_array cspc cls
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| None -> ()
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) shell_pairs
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with Exit -> ()
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) shell_pairs ;
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Printf.printf "Computed ERIs in %f seconds\n%!" (Unix.gettimeofday () -. t0);
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eri_array
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(* Parallel functions *)
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let of_basis_parallel basis =
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let n = Bs.size basis
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and shell = Bs.contracted_shells basis
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in
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let store_class_parallel
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?(cutoff=integrals_cutoff) contracted_shell_pair_couple cls =
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let to_powers x =
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let open Zkey in
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match to_powers x with
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| Three x -> x
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| _ -> assert false
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in
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let shell_p = Cspc.shell_pair_p contracted_shell_pair_couple
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and shell_q = Cspc.shell_pair_q contracted_shell_pair_couple
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in
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let result = ref [] in
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Array.iteri (fun i_c powers_i ->
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let i_c = Cs.index (Csp.shell_a shell_p) + i_c + 1 in
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let xi = to_powers powers_i in
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Array.iteri (fun j_c powers_j ->
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let j_c = Cs.index (Csp.shell_b shell_p) + j_c + 1 in
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let xj = to_powers powers_j in
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Array.iteri (fun k_c powers_k ->
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let k_c = Cs.index (Csp.shell_a shell_q) + k_c + 1 in
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let xk = to_powers powers_k in
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Array.iteri (fun l_c powers_l ->
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let l_c = Cs.index (Csp.shell_b shell_q) + l_c + 1 in
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let xl = to_powers powers_l in
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let key = Zkey.of_powers_twelve xi xj xk xl in
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let value = Zmap.find cls key in
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result := (i_c, j_c, k_c, l_c, value) :: !result
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) (Cs.zkey_array (Csp.shell_b shell_q))
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) (Cs.zkey_array (Csp.shell_a shell_q))
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) (Cs.zkey_array (Csp.shell_b shell_p))
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) (Cs.zkey_array (Csp.shell_a shell_p));
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!result
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in
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let t0 = Unix.gettimeofday () in
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let shell_pairs =
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Csp.of_contracted_shell_array shell
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|> filter_contracted_shell_pairs ~cutoff
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in
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if Parallel.master then
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Printf.printf "%d significant shell pairs computed in %f seconds\n"
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(List.length shell_pairs) (Unix.gettimeofday () -. t0);
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let t0 = Unix.gettimeofday () in
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let ishell = ref max_int in
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let input_stream = Stream.of_list (List.rev shell_pairs) in
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let f shell_p =
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let () =
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if Parallel.rank < 2 && Cs.index (Csp.shell_a shell_p) < !ishell then
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(ishell := Cs.index (Csp.shell_a shell_p) ; print_int !ishell ; print_newline ())
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in
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let sp =
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Csp.shell_pairs shell_p
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in
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let result = ref [] in
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try
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List.iter (fun shell_q ->
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let () =
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if Cs.index (Csp.shell_a shell_q) >
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Cs.index (Csp.shell_a shell_p) then
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raise Exit
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in
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let sq = Csp.shell_pairs shell_q in
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let cspc =
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if Array.length sp < Array.length sq then
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Cspc.make ~cutoff shell_p shell_q
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else
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Cspc.make ~cutoff shell_q shell_p
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in
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match cspc with
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| Some cspc ->
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let cls =
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class_of_contracted_shell_pair_couple cspc
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in
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result := (store_class_parallel ~cutoff cspc cls) :: !result;
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| None -> ()
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) shell_pairs;
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raise Exit
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with Exit -> List.concat !result |> Array.of_list
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in
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let eri_array =
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if Parallel.master then
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Fis.create ~size:n `Dense
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else
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Fis.create ~size:0 `Dense
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in
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Farm.run ~ordered:false ~f input_stream
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|> Stream.iter (fun l ->
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Array.iter (fun (i_c,j_c,k_c,l_c,value) ->
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set_chem eri_array i_c j_c k_c l_c value) l);
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if Parallel.master then
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Printf.printf
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"Computed %s Integrals in parallel in %f seconds\n%!" Zero_m.name (Unix.gettimeofday () -. t0);
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Parallel.broadcast (lazy eri_array)
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let of_basis =
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match Parallel.size with
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| 1 -> of_basis_serial
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| _ -> of_basis_parallel
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end
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