similar to: Why dovecot is not multi-threaded?

Hello all, I came across<http://www.r-bloggers.com/performance-benefits-of-linking-r-to-multithreaded-math-libraries/> David Smith's new post Performance benefits of linking R to multithreaded math libraries<http://blog.revolutionanalytics.com/2010/06/performance-benefits-of-multithreaded-r.html> Which explains how (and why) REvolution distribution of R uses different BLAS math

Hello, I'm creating a package for R. This package containes a fortran (wrapped C) *.so . This dynamic library is compiled to be multi-threaded (-parallel -openmp -threads .. options). When I call this library from R : dyn.load("mylib.so") the execution is one threaded ! Where could be a problem and how to correct it ? Thank you ! [[alternative HTML version deleted]]

Hi, I couldn't find a good answer for this anywhere in the docs, and I've looked through the code for 1.8.0; could someone who knows please confirm that R (for unix) is *not* currently multi-threaded? (I'm having trouble dynamically loading a C++ shared lib, and I want to make sure it's not thread-related) Thanks, Annie

OS: Ubuntu 10.04 32bits Core: i5 2,4ghz Video card: Ati Mobility Radeon HD 5470 1GB Hello all, I'm trying to play a direct3d MMORPG game called Ragnarok Online (if you search, you'll see it's not a heavy game), but when I connect, I noticed slow perfomance, as if the game was working just by CPU. So I'm wondering if WINE is using video acceleration for it. I'm using

Hello, I compiled R-2.15.2 with linux intel compilers (see below). when I execute some R code on a // 4 proc x 4 cores // server (export MKL_NUM_THREADS = 16) very often I have the situations where only one processor (4 cores) is active instead of 4 (16 cores) ! do you know this fact depends on what ? thank you ! P.S. many functions of R are single-threaded, is there a simple way to make them

Hi, A previous thread suggests that R on Windows is multi-threaded http://tolstoy.newcastle.edu.au/R/help/03b/6946.html When I'm running R 2.5.1 on a dual core pc I get Rgui.exe uses up to 50% of the available cpu and the rest is not used. i.e. it only uses one cpu. I'm soon going to get a nice shiny new 8 cpu machine which it would be very nice to fully utilize. Is there any way to

I have at home two centos boxes: Box A - centos 6.4. gui version Box B - centos 7.1. minimal version. They are connected to 100Mb router (both boxes have 100Mb network adapters). Box B has software raid 1 and sata II interfaces.?On box B samba4 is installed and I copy files to samba share ( from box A to box B). Network monitor (iptraf-ng) shows only 20000 kbps of this copying operation. That is

I have looked at problem with Fermi GPUs where changing to higher clock led to really bad perfomance (with GpuTest 20x worse perfomance) and later also crashes of the nouveau. It seemed to be affected by Shader Clock in Voltage Entries in the video BIOS. Disabling BYPASS_PLL_CHECK in CLK0_CTRL seems to completely fix the issue. I have tried to search this BYPASS_PLL_CHECK in Nvidia traces but

Здравствуйте, xen-users. Just test domU IO perfomance: sda1 configure via phy:/dev/sdb1. Benchmark with dbench (dbench -D /usr/src -s 10 -t 120) - 102 Mb/s Native sistem (mount /dev/sdb1 /mnt && dbench -D /mnt -s 10 -t 120) - 140 Mb/s How i can speedup dbench? -- С уважением, Vitaliy mailto:vitaliy.okulov@gmail.com

Hi all... Last monday i migrated form novell 4.0 to Samba 3.0 PDC. The server acts as a file server for 30 workstations (Win2000) using an aplicattion that combines clipper (with .dbf files) and delphi (uses paradox .px and .db). Its perfomance has been very poor since i changed the server. PLEASE HELP ME, since its in production and i really don know what to do. thanks, sebastian davancens

I want to choose one codec between iLBC and Speex,because the codec is run on the embedded system,so the performance is the key factor to be encode and decode to be a real system. so ,i like to ask which codec is better in perfomance on the same hardware system? thank you -------------- next part -------------- An HTML attachment was scrubbed... URL:

On multiple core systems OpenSSH is limited to using a single core for all operations. On these systems this can result in a transfer being processor bound even though additional CPU resources exist. In order to open up this bottleneck we've developed a multi-threaded version of the AES-CTR cipher. Unlike CBC mode, since there is no dependency between cipher blocks in CTR mode we

On Thu, Mar 09, 2023 at 09:50:00AM +0000, Richard W.M. Jones wrote: > When a highly multi-threaded program such as nbdcopy encounters an > error, there is a race condition in the library which can cause an > assertion failure and thus a core dump: > > (1) An error occurs on one of the threads. nbdcopy calls exit(3). > > (2) In lib/errors.c, the destructor calls

Thank you Johannes, I looked it up and it seems that we're creating one LLVMContext per compilation "unit", not sure if that matters. i.e. there's no single globally shared LLVMContext object. Is LLVMContext *the* concurrency isolation (or unit) here? On Wed, Apr 3, 2019 at 6:34 PM Doerfert, Johannes <jdoerfert at anl.gov> wrote: > Do you use one llvm context or one

ng, I have a matrix (x) with binary content. Each row of the matrix holds exactly one 1, and the rest of the row is zeros. The thing is that I need to 'collapse' the matrix to one column where each row holds the original column index of the 1's (y). Sometimes, the matrix is quite large, so I have a perfomance problem. x <- matrix(c(1,0,0, 0,0,1, 0,1,0, 0,0,1, 0,1,0,

Hi llvm-dev, Our code base has a ancient copy of llvm (ver 3.5.1), and it uses the LLVM code gen for some domain-specific language. The previous dev left a global lock around the usage of LLVM code gen stating that because LLVM code gen can only be accessed single-threaded it needs to be protected with this global lock. But now this lock has caused some perf issues as we pretty much lose

When a highly multi-threaded program such as nbdcopy encounters an error, there is a race condition in the library which can cause an assertion failure and thus a core dump: (1) An error occurs on one of the threads. nbdcopy calls exit(3). (2) In lib/errors.c, the destructor calls pthread_key_delete. (3) Another thread which is still running also encounters an error, and inside libnbd the

When a highly multi-threaded program such as nbdcopy encounters an error, there is a race condition in the library which can cause an assertion failure and thus a core dump: (1) An error occurs on one of the threads. nbdcopy calls exit(3). (2) In lib/errors.c, the destructor calls pthread_key_delete. (3) Another thread which is still running also encounters an error, and inside libnbd the

hi. i was migrated an old woody samba server to a new lenny samba virtualized server. That server is a PDC with random profiles and file server. Some users are reporting me bad performance in the app shared (all developed on MS-ACCESS). the memory and cpu reports in the domU show all fine, but i have some doubts in the disk performance. The dom0 is a Dell PowerEdge T610 (2 cpu Intel Xeon, 8GB

On Thu, Mar 09, 2023 at 08:44:51AM +0000, Richard W.M. Jones wrote: > When a highly multi-threaded program such as nbdcopy encounters an > error, there is a race condition in the library which can cause an > assertion failure and thus a core dump: > > (1) An error occurs on one of the threads. nbdcopy calls exit(3). > > (2) In lib/errors.c, the destructor calls