search for: ncores

Displaying 13 results from an estimated 13 matches for "ncores".

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2019 Feb 01
2
Set the number of threads using openmp with .Fortran?
...compile instructions accordingly but i had no luck. *This is my makevars:* PKG_FCFLAGS="-fno-stack-protector" F90FLAGS = "-fopenmp" LDFLAGS = "-fopenmp" *This is my Fortran module:* module hello_openmp use omp_lib implicit none contains subroutine hello(ncores) bind(C, name="hello_") use, intrinsic :: iso_c_binding, only : c_double, c_int integer(c_int), intent(in) :: ncores integer :: iam ! Specify number of threads to use...
2019 Feb 02
1
Set the number of threads using openmp with .Fortran?
..._CFLAGS) > > ##### Phony target for R's build system to invoke ##### > all: $(SHLIB) > > ##### Clean target ##### > clean: > rm -f *.o *.mod > > And when I run my hello world function all the threads are used > regardless of what i specify: > > > hello(ncores = 2) Hello from 1 > Hello from 3 > Hello from 0 > Hello from 9 > Hello from 8 > Hello from 2 > Hello from 6 > Hello from 10 > Hello from 11 > Hello from 5 > Hell...
2019 Feb 02
0
Set the number of threads using openmp with .Fortran?
...FLAGS = $(SHLIB_OPENMP_FFLAGS) PKG_LIBS = $(SHLIB_OPENMP_CFLAGS) ##### Phony target for R's build system to invoke ##### all: $(SHLIB) ##### Clean target ##### clean: rm -f *.o *.mod And when I run my hello world function all the threads are used regardless of what i specify: > hello(ncores = 2) Hello from 1 Hello from 3 Hello from 0 Hello from 9 Hello from 8 Hello from 2 Hello from 6 Hello from 10 Hello from 11 Hello from 5 Hello from 7 Hello from 4 $ncores...
2013 Apr 18
1
snow: cluster initialization
Dear all, I found a strange thing with the snow package. This will work: y = matrix(1:4, 2) cl = makeCluster(rep('localhost', 8), type='SOCK') parMM(cl, y, y) This will not: y = matrix(1:4, 2) ncore = system('nproc') parMM(cl, y, y) Error in cut.default(i, breaks) : invalid number of intervals I also tried: cl = makeCluster(rep('localhost', ncore),
2014 Apr 18
2
[LLVMdev] multithreaded performance disaster with -fprofile-instr-generate (contention on profile counters)
...I have 10 engineers in my company, > I probably want to give them 10 working desks as well. But let's not go > insane. If I have 1000 engineers, 100 desks must be enough for them. This > must reduce costs. > The baseline memory consumption for systems (and amount of RAM!) is > O(NCORES), not O(1). In some read-mostly cases it's possible to achieve > O(1) memory consumption, and that's great. But if it's not the case here, > let it be so. > > > > > shard_count = std::min(MAX, std::max(NUMBER_OF_THREADS, NUMBER_OF_CORES)) > > Threads do not pr...
2014 Apr 18
4
[LLVMdev] multithreaded performance disaster with -fprofile-instr-generate (contention on profile counters)
On Apr 17, 2014, at 2:04 PM, Chandler Carruth <chandlerc at google.com> wrote: > On Thu, Apr 17, 2014 at 1:27 PM, Justin Bogner <mail at justinbogner.com> wrote: > Chandler Carruth <chandlerc at google.com> writes: > > if (thread-ID != main's thread-ID && shard_count < std::min(MAX, NUMBER_OF_CORES)) { > > shard_count = std::min(MAX,
2015 May 11
1
Foreach %dopar% operator incorrectly load balancing
...o load balance between all of them. The issue with this is that it doesn't actually seem to perform non-trivial tasks at all anymore. This is an example of testing code I've been using for testing the %dopar% loop. library(iterators) library(foreach) library(doParallel) library(Parallel) nCores <- 4 cl <- makeCluster(nCores) registerDoParallel(cl) trials = 100000 x <- iris[which(iris[,5] != "setosa"),c(1,5)] t2 <- system.time({ r2 <- foreach(icount(trials), .combine=cbind) %dopar% { ind <- sample(100,100,replace= TRUE) results1 <- glm(x[ind...
2014 Apr 18
2
[LLVMdev] multithreaded performance disaster with -fprofile-instr-generate (contention on profile counters)
...company, I probably want to give them 10 working desks as well. But let's >>> not go insane. If I have 1000 engineers, 100 desks must be enough for them. >>> This must reduce costs. >>> The baseline memory consumption for systems (and amount of RAM!) is >>> O(NCORES), not O(1). In some read-mostly cases it's possible to achieve >>> O(1) memory consumption, and that's great. But if it's not the case here, >>> let it be so. >>> >>> >>> >>> > shard_count = std::min(MAX, std::max(NUMBER_OF_THREAD...
2014 Aug 07
2
How to (appropropriately) use require in a package?
Dear All, What is the preferred way for Package A, to initialize a cluster, and load Package B on all nodes? I am writing a package that parallelizes some functions through the use of a cluster if useRs are on a Windows machine (using parLapply and family). I also make use of another package in some of my code, so it is necessary to load the required packages on each slave once the cluster is
2012 Sep 03
1
[GIT-PULL] XFS filesystem driver
This pull request contains the XFS filesystem driver for Syslinux. Due to historical reasons (SGI IRIX's design of disk layouts), the first sector in the primary AG on XFS filesystems contains the superblock, which is a problem with BIOSes, since VBRs must be loaded up from the first sector of the active partition. Thus, we needed to handle this issue by putting the Syslinux bootsector
2015 Jul 18
1
[PATCH 1/2] xfs: rename xfs_is_valid_magicnum to xfs_is_valid_sb
xfs_is_valid_magicnum is not actually a generic function that checks for magic numbers, instead it checks only for superblock's one. Signed-off-by: Paulo Alcantara <pcacjr at zytor.com> --- core/fs/xfs/xfs.c | 13 +++++-------- core/fs/xfs/xfs.h | 19 ++++++++++--------- 2 files changed, 15 insertions(+), 17 deletions(-) diff --git a/core/fs/xfs/xfs.c b/core/fs/xfs/xfs.c index
2013 Jan 29
0
Package parallel left orphan processes, how to clean-up?
Hi, I've using package DEXSeq that implements functions with nCores for speed-up. The functions work fine, but I found out that the children processes were not terminated, they still hold memory, and new command will start up new children processes. So if I don't manually kill those orphan processes, they will cause problem. I was qlogin to SGE cluster node to...
2015 Dec 15
8
[PATCH] xfs: Add support for v3 directories
Besides supporting newer version of xfs file system, this patch also does some code refactoring and fix completely broken listing and searching on v2-3 node directories. Cc: Gene Cumm <gene.cumm at gmail.com> Cc: H. Peter Anvin <hpa at zytor.com> Cc: Raphael S. Carvalho <raphael.scarv at gmail.com> Cc: Ady <ady-sf at hotmail.com> Signed-off-by: Paulo Alcantara <pcacjr