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source("incl/start.R")
library("listenv")
message("*** multisession() ...")
for (cores in 1:availCores) {
## Speed up CRAN checks: Skip on CRAN Windows 32-bit
if (!fullTest && isWin32) next
message(sprintf("Testing with %d cores ...", cores))
options(mc.cores = cores)
## No global variables
f <- multisession({
42L
})
print(f)
stopifnot(inherits(f, "ClusterFuture") || (inherits(f, "SequentialFuture") && f$lazy))
print(resolved(f))
y <- value(f)
print(y)
stopifnot(y == 42L)
## A global variable
a <- 0
f <- multisession({
b <- 3
c <- 2
a * b * c
})
print(f)
## A multisession future is evaluated in a separate
## R session process. Changing the value of a global
## variable should not affect the result of the
## future.
a <- 7 ## Make sure globals are frozen
v <- value(f)
print(v)
stopifnot(v == 0)
message("*** multisession() with globals and blocking")
x <- listenv()
for (ii in 2:1) {
message(sprintf(" - Creating multisession future #%d ...", ii))
x[[ii]] <- multisession({ ii })
}
message(sprintf(" - Resolving %d multisession futures", length(x)))
v <- sapply(x, FUN = value)
stopifnot(all(v == 1:2))
message("*** multisession() and errors")
f <- multisession({
stop("Whoops!")
1
})
print(f)
v <- value(f, signal = FALSE)
print(v)
stopifnot(inherits(v, "simpleError"))
res <- try(value(f), silent = TRUE)
print(res)
stopifnot(inherits(res, "try-error"))
## Error is repeated
res <- try(value(f), silent = TRUE)
print(res)
stopifnot(inherits(res, "try-error"))
## Custom error class
f <- multisession({
stop(structure(list(message = "boom"),
class = c("MyError", "error", "condition")))
})
print(f)
v <- value(f, signal = FALSE)
print(v)
stopifnot(inherits(v, "error"))
## FIXME: Related to Issue #200
## https://github.com/HenrikBengtsson/Wishlist-for-R/issues/57
## stopifnot(inherits(v, "MyError"))
## Make sure error is signaled
res <- tryCatch(value(f), error = identity)
stopifnot(inherits(res, "error"))
## Issue #200: Custom condition class attributes are lost
## https://github.com/HenrikBengtsson/Wishlist-for-R/issues/57
## stopifnot(inherits(res, "MyError"))
message(sprintf("Testing with %d cores ... DONE", cores))
} ## for (cores ...)
message("*** multisession() - too large globals ...")
ooptsT <- options(future.globals.maxSize = object.size(1:1014))
limit <- getOption("future.globals.maxSize")
cat(sprintf("Max total size of globals: %g bytes\n", limit))
for (workers in unique(c(1L, availableCores()))) {
## Speed up CRAN checks: Skip on CRAN Windows 32-bit
if (!fullTest && isWin32) next
message("Max number of sessions: ", workers)
## A large object
a <- 1:1014
yTruth <- sum(a)
size <- object.size(a)
cat(sprintf("a: %g bytes\n", size))
f <- multisession({ sum(a) }, workers = workers)
print(f)
rm(list = "a")
v <- value(f)
print(v)
stopifnot(v == yTruth)
## A too large object
a <- 1:1015
yTruth <- sum(a)
size <- object.size(a)
cat(sprintf("a: %g bytes\n", size))
res <- try(f <- multisession({ sum(a) }, workers = workers), silent = TRUE)
rm(list = "a")
stopifnot(inherits(res, "try-error"))
} ## for (workers in ...)
## Undo options changed in this test
options(ooptsT)
message("*** multisession() - too large globals ... DONE")
message("*** multisession(..., workers = 1L) ...")
a <- 2
b <- 3
yTruth <- a * b
f <- multisession({ a * b }, workers = 1L)
rm(list = c("a", "b"))
v <- value(f)
print(v)
stopifnot(v == yTruth)
message("*** multisession(..., workers = 1L) ... DONE")
message("*** multisession(..., gc = TRUE) ...")
plan(multisession, workers = 2L)
f <- future({ gc() })
v <- value(f)
print(v)
f <- future({ integer(10e6) })
v <- value(f)
str(v)
f <- future({ gc() })
v <- value(f)
print(v)
f <- future({ integer(10e6) }, gc = TRUE)
v <- value(f)
str(v)
f <- future({ gc() })
v <- value(f)
print(v)
message("*** multisession(..., gc = TRUE) ... TRUE")
message("*** multisession(...) - stopping with plan() change ...")
plan(multisession, workers = 2L)
f <- future(1L)
cl <- ClusterRegistry("get")
stopifnot(inherits(cl, "cluster"), length(cl) >= 1L)
plan(sequential)
cl <- ClusterRegistry("get")
stopifnot(is.null(cl), length(cl) == 0L)
message("*** multisession(...) - stopping with plan() change ... DONE")
message("*** multisession() ... DONE")
source("incl/end.R")
|
