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message("Testing bpiterate")
quiet <- suppressWarnings
.lazyCount <- function(count) {
i <- 0L
function() {
if (i >= count)
return(NULL)
i <<- i + 1L
i
}
}
test_bpiterate_Params <- function()
{
## chunks greater than number of workers
x <- 1:5
expected <- lapply(x, sqrt)
FUN <- function(count, ...) sqrt(count)
params <- list(serial=SerialParam(),
snow=SnowParam(2))
if (.Platform$OS.type != "windows")
params$mc <- MulticoreParam(2)
for (p in params) {
ITER <- .lazyCount(length(x))
quiet(res <- bpiterate(ITER, FUN, BPPARAM=p))
checkIdentical(expected, res)
}
## chunks less than number of workers
x <- 1:2
expected <- lapply(x, sqrt)
FUN <- function(count, ...) sqrt(count)
params <- list(serial=SerialParam(),
snow=SnowParam(3))
if (.Platform$OS.type != "windows")
params$mc <- MulticoreParam(3)
for (p in params) {
ITER <- .lazyCount(length(x))
quiet(res <- bpiterate(ITER, FUN, BPPARAM=p))
checkIdentical(expected, res)
}
cl <- parallel::makeCluster(2)
doParallel::registerDoParallel(cl)
params <- list(dopar=DoparParam())
for (p in params) {
ITER <- .lazyCount(length(x))
checkException(bpiterate(ITER, FUN, BPPARAM=p), silent=TRUE)
}
## clean up
foreach::registerDoSEQ()
parallel::stopCluster(cl)
closeAllConnections()
TRUE
}
test_bpiterate_REDUCE <- function() {
ncount <- 3L
params <- list(snow=SnowParam(ncount))
## On Windows MulticoreParam dispatches to SerialParam where
## 'reduce.in.order' does not apply (always TRUE)
if (.Platform$OS.type != "windows")
params <- c(params, multi=MulticoreParam(ncount))
for (p in params) {
## no REDUCE
FUN <- function(count, ...) rep(count, 10)
ITER <- .lazyCount(ncount)
res <- bpiterate(ITER, FUN, BPPARAM=p)
checkTrue(length(res) == ncount)
expected <- list(rep(1L, 10), rep(2L, 10), rep(3L, 10))
checkIdentical(expected, res)
## REDUCE
FUN <- function(count, ...) rep(count, 10)
ITER <- .lazyCount(ncount)
res <- bpiterate(ITER, FUN, BPPARAM=p, REDUCE=`+`)
checkIdentical(rep(6L, 10), res)
FUN <- function(count, ...) {
Sys.sleep(3 - count)
count
}
## 'reduce.in.order' FALSE
ITER <- .lazyCount(ncount)
res <- bpiterate(ITER, FUN, BPPARAM=p, REDUCE=paste0,
reduce.in.order=FALSE)
checkIdentical("321", res)
ITER <- .lazyCount(ncount)
res <- quiet(bpiterate(ITER, FUN, BPPARAM=p, REDUCE=paste0, init=0,
reduce.in.order=FALSE))
checkIdentical("0321", res)
## 'reduce.in.order' TRUE
ITER <- .lazyCount(ncount)
res <- bpiterate(ITER, FUN, BPPARAM=p, REDUCE=paste0,
reduce.in.order=TRUE)
checkIdentical("123", res)
ITER <- .lazyCount(ncount)
res <- bpiterate(ITER, FUN, BPPARAM=p, REDUCE=paste0,
init=0, reduce.in.order=TRUE)
checkIdentical("0123", res)
}
## clean up
closeAllConnections()
TRUE
}
test_bpiterate_REDUCE_SerialParam <- function() {
p <- SerialParam()
FUN <- identity
## REDUCE missing, concatenate
ITER <- .lazyCount(0)
res <- suppressWarnings({
## warning: first invocation of 'ITER()' returned NULL
bpiterate(ITER, FUN, BPPARAM=p)
})
checkIdentical(list(), res)
ITER <- .lazyCount(1)
res <- bpiterate(ITER, FUN, BPPARAM=p)
checkIdentical(list(1L), res)
ITER <- .lazyCount(5)
res <- bpiterate(ITER, FUN, BPPARAM=p)
checkIdentical(as.list(1:5), res)
## REDUCE == `+`
ITER <- .lazyCount(0)
res <- suppressWarnings({
## warning: first invocation of 'ITER()' returned NULL
res <- bpiterate(ITER, FUN, BPPARAM=p, REDUCE=`+`)
})
checkIdentical(NULL, res)
ITER <- .lazyCount(1)
res <- bpiterate(ITER, FUN, BPPARAM=p, REDUCE=`+`)
checkIdentical(1L, res)
ITER <- .lazyCount(5)
res <- bpiterate(ITER, FUN, BPPARAM=p, REDUCE=`+`)
checkIdentical(15L, res)
}
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