similar to: Fileserver performance tests

Greeting All I am using Filebench benchmark in an "Interactive mode" to test ZFS performance with randomread wordload. My Filebench setting & run results are as follwos ------------------------------------------------------------------------------------------ filebench> set $filesize=5g filebench> set $dir=/hdd/fs32k filebench> set $iosize=32k filebench> set

Hi, I am using LLVM 3.6.1 to test the following code: #include <omp.h> #include <stdio.h> #include <stdlib.h> int main() { int tid, nthreads; #pragma omp parallel sections private(nthreads, tid) { #pragma omp section { tid = omp_get_thread_num(); printf("Hello, tid = %d\n ", tid); } #pragma omp section { tid = omp_get_thread_num();

On 29/10/2007, Tek Bahadur Limbu <teklimbu at wlink.com.np> wrote: > I created a ZFS file system like the following with /mypool/cache being > the partition for the Squid cache: > > 18:51:27 root at solaris:~$ zfs list > NAME USED AVAIL REFER MOUNTPOINT > mypool 478M 31.0G 10.0M /mypool > mypool/cache 230M 9.78G 230M

HI, The question is a ZFS performance question in reguards to SAN traffic. We are trying to benchmark ZFS vx VxFS file systems and I get the following performance results. Test Setup: Solaris 10: 11/06 Dual port Qlogic HBA with SFCSM (for ZFS) and DMP (of VxFS) Sun Fire v490 server LSI Raid 3994 on backend ZFS Record Size: 128KB (default) VxFS Block Size: 8KB(default) The only thing

Dear R experts, recently I started developing a Rcpp package "OpenMPTest". Within that package I want to use OpenMP, as in the following code example: // header file #include <omp.h> using namespace Rcpp ; RcppExport SEXP testOpenMP( SEXP nThreads ) ; // cpp file SEXP testOpenMP( SEXP nThreads ) { BEGIN_RCPP NumericVector numberThreads = NumericVector( nThreads );

I got this to work on Linux but it is not working on Windows. *My understanding is that this should also work on windows, is that correct?* If so, what should I do? differently? To get it to work on Linux, I modified my R script as follows: #' OpenMP Hello World #' #' @param nthreads The number of threads that you want to use #' @example #' hello(nthreads=2) #' @export

Hi everybody, I'm trying to develop an R package with Fortran and OpenMP. I wrote a simple hello world but I'm not able to set the number of threads. I found this old email chain <http://r.789695.n4.nabble.com/Set-the-number-of-threads-using-openmp-with-C-td2284685.html> and I tried to set my compile instructions accordingly but i had no luck. *This is my makevars:*

Hi everybody! Could somebody help me with the following? I'm trying to run a simple Hello World code in openmp using .C function. The C code i have is: #include <omp.h> #include <stdio.h> #include <R.h> void hello_omp(int *n) { int th_id, nthreads; omp_set_num_threads(*n); #pragma omp parallel private(th_id) { th_id = omp_get_thread_num();

Hi there I''m busy with some tests on the above hardware and will post some scores soon. For those that do _not_ have the above available for tests, I''m open to suggestions on potential configs that I could run for you. Pop me a mail if you want something specific _or_ you have suggestions concerning filebench (varmail) config setup. Cheers This message posted from

"Michael S. Tsirkin" <mst at redhat.com> wrote on 20/08/2014 01:57:10 PM: > > Results: > > > > Netperf, 1 vm: > > The polling patch improved throughput by ~33% (1516 MB/sec -> 2046 MB/sec). > > Number of exits/sec decreased 6x. > > The same improvement was shown when I tested with 3 vms running netperf > > (4086 MB/sec -> 5545

"Michael S. Tsirkin" <mst at redhat.com> wrote on 20/08/2014 01:57:10 PM: > > Results: > > > > Netperf, 1 vm: > > The polling patch improved throughput by ~33% (1516 MB/sec -> 2046 MB/sec). > > Number of exits/sec decreased 6x. > > The same improvement was shown when I tested with 3 vms running netperf > > (4086 MB/sec -> 5545

I am trying to parallelize part of a C function that is called from R (via .C) using OpenMP's "parallel for" pragma. I get mixed results: some runs finish with no problem, but some lead to R crashing after issuing a long error message involving memory violations. I found this post, which describes how a .Call() function can be made to avoid crashing R by raising the stack limit:

I have setup a distributed glusterfs volume with 3 servers. the network is 1GbE, i get filebench test with a client. refer to this link: https://s3.amazonaws.com/aws001/guided_trek/Performance_in_a_Gluster_Systemv6F.pdf the more server for gluster, more throughput should gain. I have tested the network, the bandwidth is 117 MB/s, so when i have 3 servers i should gain about 300 MB/s (3*117

From: Razya Ladelsky <razya at il.ibm.com> Date: Thu, 31 Jul 2014 09:47:20 +0300 Subject: [PATCH] vhost: Add polling mode When vhost is waiting for buffers from the guest driver (e.g., more packets to send in vhost-net's transmit queue), it normally goes to sleep and waits for the guest to "kick" it. This kick involves a PIO in the guest, and therefore an exit (and possibly

From: Razya Ladelsky <razya at il.ibm.com> Date: Thu, 31 Jul 2014 09:47:20 +0300 Subject: [PATCH] vhost: Add polling mode When vhost is waiting for buffers from the guest driver (e.g., more packets to send in vhost-net's transmit queue), it normally goes to sleep and waits for the guest to "kick" it. This kick involves a PIO in the guest, and therefore an exit (and possibly

Can anybody tell me how to measure the raw performance of a new system I''m putting together? I''d like to know what it''s capable of in terms of IOPS and raw throughput to the disks. I''ve seen Richard''s raidoptimiser program, but I''ve only seen results for random read iops performance, and I''m particularly interested in write

Hello, I have been experimenting with ZFS on a test box, preparing to present it to management. One thing I cannot test right now is our real-world application load. We write to CIFS shares currently in small files. We write about 250,000 files a day, in various sizes (1KB to 500MB). Some directories get a lot of individual files (sometimes 50,000 or more) in a single directory. We spoke to a Sun

Dears, I am writing a code in Fortran using OpenMP directives. When compiling the code in gfortran 4.4 does not occur any problem. When compiling the code in gfortran 4.6, an error message appears. In other compilers the error does not occur. A small example. ## Code in Fortran        subroutine hello()        implicit none        integer :: nthreads, tid        integer ::

I''m looking at the newly-orderable (via Sun) STEC Zeus SSDs, and they''re outrageously priced. http://www.stec-inc.com/product/zeusssd.php I just looked at the Intel X25-E series, and they look comparable in performance. At about 20% of the cost. http://www.intel.com/design/flash/nand/extreme/index.htm Can anyone enlighten me as to any possible difference between an STEC

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,