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run_baylens2_chain.jl
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run_baylens2_chain.jl
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using ArgParse, Match
s = ArgParseSettings()
@add_arg_table! s begin
"--configuration";
"-T"; default=Float32; eval_arg=true
"--Nside"; default=128; arg_type=Int
"--θpix"; default=3; arg_type=Int
"--pol"; default=:P; arg_type=Symbol
"--beamFWHM"; default=1.; arg_type=Float64
"--μKarcminT"; default=1.; arg_type=Float64
"--bandpass_mask"; default="LowPass(3000)"
"--pixel_mask_kwargs"; eval_arg=true
"--storage"; default="Array"; range_tester=in(("Array","CuArray"))
"--ϕstart"; default="quasi_sample"; range_tester=in(("quasi_sample","bestfit","0"))
"--Nϕ_fac"; default=2f0; arg_type=Float32
"--filename"
"--resume"; action=:store_true
"--symp_kwargs"; default=[(N=25, ϵ=0.01)]; eval_arg=true
"--nchains"; default=1; arg_type=Int
"--nsamps_per_chain"; default=2000; arg_type=Int
"--nlenseflow_ode"; default=10; arg_type=Int
"--seed"; arg_type=Int;
"--nchunk"; default=30; arg_type=Int
"--nsavemaps"; default=5; arg_type=Int
"--nburnin_always_accept"; default=50; arg_type=Int
"--nburnin_fixθ"; default=10; arg_type=Int
"--sampled_params"; default=[:Aϕ,:r]; eval_arg=true
"--rfid"; default=0.05; arg_type=Float64
end
args = parse_args(ARGS, s)
###
# configurations from the paper
merge!(args, @match args["configuration"] begin
"2PARAM" => begin
Dict(
"pol" => :P,
"Nside" => 256,
"θpix" => 2,
"μKarcminT" => 1/√2,
"beamFWHM" => 2,
"bandpass_mask" => "LowPass(5000)",
"pixel_mask_kwargs" => (edge_padding_deg=0.4, apodization_deg=0.6, edge_rounding_deg=0.1, num_ptsrcs=0),
"sampled_params" => [:Aϕ,:r],
"rfid" => 0.04,
"symp_kwargs" => [(N=25, ϵ=0.02)]
)
end
"MANY" => begin
if !(args["rfid"] in [0,0.02,0.04])
@warn "rfid=$(args["rfid"]) inconsistent with configuration $(args["configuration"])"
end
Dict(
"pol" => :P,
"Nside" => 256,
"θpix" => 3,
"μKarcminT" => 1/√2,
"beamFWHM" => 3,
"bandpass_mask" => "LowPass(3500)",
"pixel_mask_kwargs" => (edge_padding_deg=0.6, apodization_deg=0.9, edge_rounding_deg=0.1, num_ptsrcs=0),
"sampled_params" => [:r],
"symp_kwargs" => [(N=25, ϵ=0.02)]
)
end
"BIG" => begin
if !(args["rfid"] in [0,0.01,0.02])
@warn "rfid=$(args["rfid"]) inconsistent with configuration $(args["configuration"])"
end
Dict(
"pol" => :P,
"Nside" => 512,
"θpix" => 3,
"μKarcminT" => 1/√2,
"beamFWHM" => 3,
"bandpass_mask" => "LowPass(3500)",
"pixel_mask_kwargs" => (edge_padding_deg=1.2, apodization_deg=1.8, edge_rounding_deg=0.2, num_ptsrcs=0),
"sampled_params" => [:r],
"symp_kwargs" => [(N=25, ϵ=0.02)]
)
end
_::Nothing => Dict()
c => error("Unrecognized configuration: $c")
end)
if args["storage"]=="CuArray"
using CuArrays
end
args["storage"] = eval(Symbol(args["storage"]))
args["ϕstart"] = args["ϕstart"] == "0" ? 0 : Symbol(args["ϕstart"]);
## if running multiple chains & GPUs, set each process to use one GPU
using Distributed
if args["nchains"]>1 && args["storage"]==CuArray
using CUDAdrv
length(devices()) == args["nchains"] || error("nchains=$(args["nchains"]) but $(length(devices())) GPUs found.")
addprocs(length(devices()))
@everywhere workers() begin
using Pkg
# activate the same environment on the workers as the master
Pkg.activate($(Pkg.API.Context().env.project_file))
using CUDAnative, CuArrays
# until the fixes to https://github.com/JuliaGPU/CuArrays.jl/issues/589 hit a release:
CuArrays.CURAND.seed!(rand(0:typemax(Int)))
end
# assign devices
asyncmap((zip(workers(), devices()))) do (p, d)
remotecall_wait(p) do
@info "Worker $p uses $d"
device!(d)
end
end
end
### load dataset
@info "Loading code..."
@time @everywhere begin
using CMBLensing
using CMBLensing: grid_and_sample
end
@info "Loading dataset..."
@unpack f, f̃, ϕ, ds = @time load_sim_dataset(
Nside = args["Nside"],
T = args["T"],
θpix = args["θpix"],
pol = args["pol"],
L = LenseFlow{RK4Solver{args["nlenseflow_ode"]}},
seed = args["seed"],
rfid = args["rfid"],
beamFWHM = args["beamFWHM"],
μKarcminT = args["μKarcminT"],
pixel_mask_kwargs = args["pixel_mask_kwargs"],
bandpass_mask = eval(Meta.parse(args["bandpass_mask"])),
Nϕ_fac = args["Nϕ_fac"],
);
### baylens2-specific Gibbs θ-pass
@everywhere function baylens2_gibbs_pass_θ(;kwargs...)
@unpack f°,ϕ°,θ,ds,θrange,progress = kwargs
lnP_Aϕ, θ_Aϕ, lnP_r, θ_r = (), (), (), ()
# sample Aϕ
if :Aϕ in keys(θrange)
lnP_Aϕ, θ_Aϕ = grid_and_sample(
θ′->lnP(:mix,f°,ϕ°,merge(θ,θ′),ds),
(Aϕ=θrange.Aϕ,),
progress=(progress==:verbose)
)
lnP_Aϕ = (Aϕ=lnP_Aϕ,)
θ = merge(θ,θ_Aϕ)
end
# sample r
if :r in keys(θrange)
lnP_r, θ_r = grid_and_sample(
θ′->lnP(:mix,f°,ϕ°,merge(θ,θ′),ds),
(r=θrange.r,),
progress=(progress==:verbose)
)
lnP_r = (r=lnP_r,)
θ = merge(θ,θ_r)
end
(;lnP_Aϕ..., lnP_r...), θ
end
## run sampler
θrange₀ = (
Aϕ = range(0.75, 1.25, length=50),
r = range(sqrt(1e-6), sqrt(1e-1), length=50).^2
)
if !isinteractive()
@info "Starting chain..."
@unpack (rundat, chains) = sample_joint(
ds,
nchains = args["nchains"],
nsamps_per_chain = args["nsamps_per_chain"],
storage = args["storage"],
chains = args["resume"] ? :resume : nothing,
nchunk = args["nchunk"],
nsavemaps = args["nsavemaps"],
nburnin_always_accept = args["nburnin_always_accept"],
nburnin_fixθ = args["nburnin_fixθ"],
θrange = (;(k=>v for (k,v) in pairs(θrange₀) if k in args["sampled_params"])...),
gibbs_pass_θ = baylens2_gibbs_pass_θ,
ϕstart = args["ϕstart"],
Nϕ_fac = args["Nϕ_fac"],
wf_kwargs = (tol=1e-1, nsteps=200),
symp_kwargs = args["symp_kwargs"],
MAP_kwargs = (αmax=0.3, nsteps=5),
progress = :summary,
interruptable = true,
filename = args["filename"]
);
end