Improvements to model performance by reducing allocations

src/ecosystem/corals/growth.jl

@@ -494,17 +494,20 @@ function _shift_distributions!(
     # Weight distributions based on growth rate and cover
     # Do from largest size class to size class 2
     # (values for size class 1 gets replaced by recruitment process)
+    prop_growth = MVector{2,F}(0.0, 0.0)
     for i in length(growth_rate):-1:2
         # Skip size class if nothing is moving up
-        sum(@view(cover[(i - 1):i])) == 0.0 ? continue : false
+        sum(view(cover, (i - 1):i)) == 0.0 ? continue : false
 
-        prop_growth = @views (cover[(i - 1):i] ./ sum(cover[(i - 1):i])) .*
+        prop_growth .= @views (cover[(i - 1):i] ./ sum(cover[(i - 1):i])) .*
             (growth_rate[(i - 1):i] ./ sum(growth_rate[(i - 1):i]))
         if sum(prop_growth) == 0.0
             continue
         end
 
-        dist_t[i] = sum(@view(dist_t[(i - 1):i]), Weights(prop_growth ./ sum(prop_growth)))
+        # Weighted sum
+        dist_t[i] =
+            (dist_t[i - 1] * prop_growth[1] + dist_t[i] * prop_growth[2]) / sum(prop_growth)
     end
 
     return nothing
@@ -577,86 +580,6 @@ function adjust_DHW_distribution!(
     return nothing
 end
 
-"""
-    settler_DHW_tolerance!(c_mean_t_1::Matrix{F}, c_mean_t::Matrix{F}, k_area::Vector{F}, tp::AbstractMatrix{F}, settlers::Matrix{F}, fec_params_per_m²::Vector{F}, h²::F)::Nothing where {F<:Float64}
-
-Update DHW tolerance means of newly settled corals into the distributions for the sink
-locations.
-
-# Arguments
-- `c_mean_t_1` : DHW tolerance distribution for previous timestep (t - 1)
-- `c_mean_t` : DHW tolerance distribution for current timestep (t)
-- `k_area` : Absolute coral habitable area
-- `tp` : Transition Probability matrix indicating the proportion of larvae that reaches a
-    sink location (columns) from a given source location (rows)
-    Columns should sum to 1
-- `settlers` : recruited corals for each sink location
-- `fec_params_per_m²` : Fecundity parameters for each species/size class combination
-- `h²` : narrow-sense heritability
-"""
-function settler_DHW_tolerance!(
-    c_mean_t_1::Matrix{F},
-    c_mean_t::Matrix{F},
-    k_area::Vector{F},
-    tp::AbstractMatrix{F},
-    settlers::Matrix{F},
-    fec_params_per_m²::Vector{F},
-    h²::F,
-    n_sizes::Int64
-)::Nothing where {F<:Float64}
-    # Potential sink locations (TODO: pass in later)
-    sink_loc_ids::Vector{Int64} = findall(k_area .> 0.0)
-
-    source_locs::BitVector = falses(length(k_area))  # cache for source locations
-    reproductive_sc::BitVector = falses(n_sizes)  # cache for reproductive size classes
-
-    settler_sc::StepRange = 1:n_sizes:length(fec_params_per_m²)
-    for sink_loc in sink_loc_ids
-        if sum(@views(settlers[:, sink_loc])) .== 0.0
-            # Only update locations where recruitment occurred
-            continue
-        end
-
-        # Note: source locations can include the sink location (self-seeding)
-        source_locs .= @view(tp[:, sink_loc]) .> 0.0
-
-        # Calculate contribution to cover to determine weights for each species/group
-        w = @views settlers[:, sink_loc]' .* tp[source_locs, sink_loc].data
-        w_per_group = w ./ sum(w; dims=1)
-        replace!(w_per_group, NaN => 0.0)
-
-        # Determine new distribution mean for each species at all locations
-        for (sp, sc1) in enumerate(settler_sc)
-            sc1_end::UnitRange{Int64} = sc1:(sc1 + (n_sizes - 1))
-
-            # Get distribution mean of reproductive size classes at source locations
-            # recalling that source locations may include the sink location due to
-            # self-seeding.
-            reproductive_sc .= @view(fec_params_per_m²[sc1_end]) .> 0.0
-            settler_means::SubArray{Float64} = @view(
-                c_mean_t_1[sc1_end[reproductive_sc], source_locs]
-            )
-
-            # Determine weights based on contribution to recruitment.
-            # This weights the recruited corals by the size classes and source locations
-            # which contributed to recruitment.
-            if sum(w_per_group[:, sp]) > 0.0
-                ew::Vector{Float64} = repeat(
-                    w_per_group[:, sp]; inner=count(reproductive_sc)
-                )
-
-                # Determine combined mean
-                # https://en.wikipedia.org/wiki/Mixture_distribution#Properties
-                recruit_μ::Float64 = sum(settler_means, Weights(ew ./ sum(ew)))
-
-                # Mean for generation t is determined through Breeder's equation
-                c_mean_t[sc1, sink_loc] = breeders(c_mean_t_1[sc1, sink_loc], recruit_μ, h²)
-            end
-        end
-    end
-
-    return nothing
-end
 function settler_DHW_tolerance!(
     c_mean_t_1::AbstractArray{F,3},
     c_mean_t::AbstractArray{F,3},
@@ -669,47 +592,59 @@ function settler_DHW_tolerance!(
     groups, sizes, _ = axes(c_mean_t_1)
 
     sink_loc_ids::Vector{Int64} = findall(k_area .> 0.0)
+    source_locs::BitVector = BitVector(undef, length(k_area))  # cache for source locations
+
+    # Number of reproductive size classes for each group
+    n_reproductive::Matrix{Int64} = sum(fec_params_per_m² .> 0.0; dims=2)
 
-    source_locs::BitVector = falses(length(k_area))  # cache for source locations
-    reproductive_sc::BitVector = falses(length(sizes))  # cache for reproductive size classes
+    # Cache to hold indication of which size classes are considered reproductive
+    reproductive_sc::BitVector = falses(sizes)
 
-    for sink_loc in sink_loc_ids
-        if sum(@views(settlers[:, sink_loc])) .== 0.0
+    @inbounds for sink_loc in sink_loc_ids
+        sink_settlers = @view(settlers[:, sink_loc])'
+        if sum(sink_settlers) .== 0.0
             # Only update locations where recruitment occurred
             continue
         end
 
+        # Find sources for each sink
         # Note: source locations can include the sink location (self-seeding)
-        source_locs .= @view(tp[:, sink_loc]) .> 0.0
+        @inbounds for i in axes(@view(tp.data[:, sink_loc]), 1)
+            source_locs[i] = tp.data[i, sink_loc] > 0.0
+        end
 
-        # Calculate contribution to cover to determine weights for each species/group
-        w = @views settlers[:, sink_loc]' .* tp.data[source_locs, sink_loc]
-        w_per_group = w ./ sum(w; dims=1)
-        replace!(w_per_group, NaN => 0.0)
+        # Calculate contribution to cover to determine weights for each functional group
+        w::Matrix{F} = sink_settlers .* @view(tp.data[source_locs, sink_loc])
+        w_per_group::Matrix{F} = w ./ sum(w; dims=1)
 
-        for grp in groups
-            # Get distribution mean of reproductive size classes at source locations
-            # recalling that source locations may include the sink location due to
-            # self-seeding.
-            reproductive_sc .= @view(fec_params_per_m²[grp, :]) .> 0.0
-            settler_means::SubArray{Float64} = @view(
-                c_mean_t_1[grp, reproductive_sc, source_locs]
-            )
+        # If there is any influence from another location for a group, the tolerance
+        # values should be updated.
+        update_group::BitMatrix = sum(w_per_group; dims=1) .> 0.0
 
+        for grp in groups
             # Determine weights based on contribution to recruitment.
             # This weights the recruited corals by the size classes and source locations
             # which contributed to recruitment.
-            if sum(w_per_group[:, grp]) > 0.0
-                ew::Vector{Float64} = repeat(
-                    w_per_group[:, grp]; inner=count(reproductive_sc)
-                )
+            if update_group[1, grp]
+                # Get distribution mean of reproductive size classes at source locations
+                # recalling that source locations may include the sink location due to
+                # self-seeding.
+                reproductive_sc .= @view(fec_params_per_m²[grp, :]) .> 0.0
 
                 # Determine combined mean
                 # https://en.wikipedia.org/wiki/Mixture_distribution#Properties
-                recruit_μ::Float64 = sum(settler_means, Weights(ew ./ sum(ew)))
+                settler_means::SubArray{F} = @view(
+                    c_mean_t_1[grp, reproductive_sc, source_locs]
+                )
+
+                recruit_μ::F = 0.0
+                @inbounds for i in axes(settler_means, 1), j in axes(settler_means, 2)
+                    recruit_μ += settler_means[i, j] * w_per_group[j, grp]
+                end
+                recruit_μ /= n_reproductive[grp]
 
                 # Mean for generation t is determined through Breeder's equation
-                c_mean_t[grp, 1, sink_loc] = breeders(
+                @views c_mean_t[grp, 1, sink_loc] = breeders(
                     c_mean_t_1[grp, 1, sink_loc], recruit_μ, h²
                 )
             end
@@ -908,16 +843,18 @@ Area covered by recruited larvae (in m²)
 function settler_cover(
     fec_scope::T,
     conn::AbstractMatrix{Float64},
-    leftover_space::T,
+    leftover_space::V,
     α::V,
     β::V,
     basal_area_per_settler::V,
-    potential_settlers::T
-)::T where {T<:Matrix{Float64},V<:Vector{Float64}}
+    potential_settlers::T,
+    valid_sources::BitVector,
+    valid_sinks::BitVector
+)::T where {T<:AbstractMatrix{Float64},V<:Vector{Float64}}
 
     # Determine active sources and sinks
-    valid_sources::BitVector = vec(sum(conn; dims=2) .> 0.0)
-    valid_sinks::BitVector = vec(sum(conn; dims=1) .> 0.0)
+    valid_sources .= dropdims(sum(conn.data; dims=2) .> 0.0; dims=2)
+    valid_sinks .= dropdims(sum(conn.data; dims=1) .> 0.0; dims=1)
 
     # Send larvae out into the world (reuse potential_settlers to reduce allocations)
     # Note, conn rows need not sum to 1.0 as this missing probability accounts for larvae
@@ -926,8 +863,8 @@ function settler_cover(
     # this is known as in-water mortality.
     # Set to 0.0 as it is now taken care of by connectivity data.
     # Mwater::Float64 = 0.0
-    @views potential_settlers[:, valid_sinks] .= (
-        fec_scope[:, valid_sources] * conn[valid_sources, valid_sinks]
+    @views @inbounds potential_settlers[:, valid_sinks] .= (
+        fec_scope[:, valid_sources] * conn.data[valid_sources, valid_sinks]
     )
 
     # Larvae have landed, work out how many are recruited

src/scenario.jl

@@ -411,7 +411,7 @@ function run_model(domain::Domain, param_set::Union{DataFrameRow,YAXArray})::Nam
     n_sizes::Int64 = domain.coral_growth.n_sizes
     n_groups::Int64 = domain.coral_growth.n_groups
     _bin_edges::Matrix{Float64} = bin_edges()
-    functional_groups = [
+    functional_groups = Vector{FunctionalGroup}[
         FunctionalGroup.(
             eachrow(_bin_edges[:, 1:(end - 1)]),
             eachrow(_bin_edges[:, 2:end]),
@@ -425,6 +425,7 @@ function run_model(
     param_set::DataFrameRow,
     functional_groups::Vector{Vector{FunctionalGroup}}
 )::NamedTuple
+    setup()
     ps = DataCube(Vector(param_set); factors=names(param_set))
     return run_model(domain, ps, functional_groups)
 end
@@ -531,8 +532,9 @@ function run_model(
     loc_cover_cache = zeros(n_locs)
 
     # Locations that can support corals
+    vec_abs_k = site_k_area(domain)
     habitable_locs::BitVector = location_k(domain) .> 0.0
-    habitable_loc_areas = site_k_area(domain)[habitable_locs]
+    habitable_loc_areas = vec_abs_k[habitable_locs]
     habitable_loc_areas′ = reshape(habitable_loc_areas, (1, 1, length(habitable_locs)))
 
     # Avoid placing importance on sites that were not considered
@@ -671,7 +673,7 @@ function run_model(
     p.r .= _to_group_size(domain.coral_growth, corals.growth_rate)
     p.mb .= _to_group_size(domain.coral_growth, corals.mb_rate)
 
-    area_weighted_conn = conn .* site_k_area(domain)
+    area_weighted_conn = conn .* vec_abs_k
     conn_cache = similar(area_weighted_conn.data)
 
     # basal_area_per_settler is the area in m^2 of a size class one coral
@@ -692,7 +694,7 @@ function run_model(
     # Empty the old contents of the buffers and add the new blocks
     cover_view = [@view C_cover[1, :, :, loc] for loc in 1:n_locs]
     functional_groups = reuse_buffers!.(
-        functional_groups, (cover_view .* vec(loc_k_area))
+        functional_groups, (cover_view .* vec_abs_k)
     )
 
     # Preallocate memory for temporaries
@@ -707,7 +709,12 @@ function run_model(
         habitable_loc_areas
     )
 
+    # Preallocated cache for source/sink locations
+    valid_sources::BitVector = falses(size(conn, 2))
+    valid_sinks::BitVector = falses(size(conn, 1))
+
     FLoops.assistant(false)
+    habitable_loc_idxs = findall(habitable_locs)
     for tstep::Int64 in 2:tf
         # Convert cover to absolute values to use within CoralBlox model
         C_cover_t[:, :, habitable_locs] .=
@@ -725,7 +732,7 @@ function run_model(
         lin_ext_scale_factors[_loc_coral_cover(C_cover_t)[habitable_locs] .< (0.7 .* habitable_loc_areas)] .=
             1
 
-        @floop for i in findall(habitable_locs)
+        @floop for i in habitable_loc_idxs
             # TODO Skip when _loc_rel_leftover_space[i] == 0
 
             # Perform timestep
@@ -746,14 +753,15 @@ function run_model(
         ) "Cover outgrowing habitable area"
 
         # Convert C_cover_t to relative values after CoralBlox was run
-        C_cover_t[:, :, habitable_locs] .=
-            C_cover_t[:, :, habitable_locs] ./ habitable_loc_areas′
-        C_cover[tstep, :, :, habitable_locs] .= C_cover_t[:, :, habitable_locs]
+        C_cover_t[:, :, habitable_locs] .= (
+            @view(C_cover_t[:, :, habitable_locs]) ./ habitable_loc_areas′
+        )
+        C_cover[tstep, :, :, habitable_locs] .= @view(C_cover_t[:, :, habitable_locs])
 
         # Natural adaptation (doesn't change C_cover_t)
         if tstep <= tf
             adjust_DHW_distribution!(
-                @view(C_cover[(tstep - 1), :, :, :]), c_mean_t, p.r
+                @view(C_cover[tstep - 1, :, :, :]), c_mean_t, p.r
             )
 
             # Set values for t to t-1
@@ -772,31 +780,33 @@ function run_model(
         fecundity_scope!(fec_scope, fec_all, fec_params_per_m², C_cover_t, loc_k_area)
 
         loc_coral_cover = _loc_coral_cover(C_cover_t)
-        leftover_space_m² = relative_leftover_space(loc_coral_cover) .* loc_k_area'
+        leftover_space_m² = relative_leftover_space(loc_coral_cover) .* vec_abs_k
 
         # Reset potential settlers to zero
         potential_settlers .= 0.0
         recruitment .= 0.0
 
         # Recruitment represents additional cover, relative to total site area
         # Recruitment/settlement occurs after the full moon in October/November
-        recruitment[:, habitable_locs] .=
+        @views recruitment[:, habitable_locs] .=
             settler_cover(
                 fec_scope,
                 conn,
                 leftover_space_m²,
                 sim_params.max_settler_density,
                 sim_params.max_larval_density,
                 basal_area_per_settler,
-                potential_settlers
+                potential_settlers,
+                valid_sources,
+                valid_sinks
             )[
                 :, habitable_locs
             ] ./ loc_k_area[:, habitable_locs]
 
         settler_DHW_tolerance!(
             c_mean_t_1,
             c_mean_t,
-            vec(loc_k_area),
+            vec_abs_k,
             TP_data,  # ! IMPORTANT: Pass in transition probability matrix, not connectivity!
             recruitment,
             fec_params_per_m²,
@@ -930,7 +940,7 @@ function run_model(
             seed_locs = findall(log_location_ranks.locations .∈ [selected_seed_ranks])
             seed_corals!(
                 C_cover_t,
-                vec(loc_k_area),
+                vec_abs_k,
                 vec(leftover_space_m²),
                 seed_locs,  # use location indices
                 seeded_area,