Sponsored Content
Special Forums UNIX and Linux Applications High Performance Computing Benchmarking a Beowulf Cluster Post 302314323 by otheus on Friday 8th of May 2009 04:27:08 AM
Old 05-08-2009
Quote:
That is trying to run it on 8 cores across 2 nodes. I have also tried your HPL.dat you provided, and i get a similar error except it says Need at least 12 processes.

Do you know what causes these errors. I have a hosts file in the same directory with the names of the two nodes which i wish to run the tests on.

At the command line i am typing:

mpirun -np 8 -machinefile hosts xhpl_em64t

where hosts file has the names:
machine1
machine2
Several points:
  • The number of processor-cores you run this thing on must match the product of P and Q. So if P is 2 and Q is 4, you will need 8 cores; no more, no less
  • If you provide MPICH with -np 8 and you specify a machine file, it expects at least that number of hosts in the machine file. If a host has multiple processor-cores (in your case, yes of course), you enter the hostname for each core. So if machine1 has 8 processor cores, your machinefile should include 8 lines of "machine1".
 

9 More Discussions You Might Find Interesting

1. UNIX Benchmarks

Server and Workstation benchmarking

This is from my server AMD K6 133MHz 64Mb RAM 4GB HDD (Maxtor - ATA33) 2x10Mb NIC 1Mb Intel Graphic Card BYTE UNIX Benchmarks (Version 3.11) System -- FreeBSD sergiu.tarnita.net 5.0-RELEASE FreeBSD 5.0-RELEASE #2: Thu Mar 17 15:49:16 EET 2005... (0 Replies)
Discussion started by: Sergiu-IT
0 Replies

2. HP-UX

HP-Unix Hardware benchmarking

Hi everyone, I'm working on one HP-Unix application which we have to port completely onto Windows xp. Before that I have to compare performance of two different machines. My HP-Unix is running on HP-C8000 workstation and windows XP machine is intel Xeon. Now the problem is to evaluate the... (0 Replies)
Discussion started by: dgatkal
0 Replies

3. High Performance Computing

Building a Solaris Cluster Express cluster in a VirtualBox on OpenSolaris

Provides a description of how to set up a Solaris Cluster Express cluster in a VirtualBox on OpenSolaris. More... (0 Replies)
Discussion started by: Linux Bot
0 Replies

4. High Performance Computing

MySQL Cluster - Designing, Evaluating and Benchmarking (reg. req'd)

Registration is required. In this white paper learn the fundamentals of how to design and select the proper components for a successful MySQL Cluster evaluation. Explore hardware, networking and software requirements. Work through basic functional testing and evaluation best practices. More... (0 Replies)
Discussion started by: Linux Bot
0 Replies

5. High Performance Computing

Tuning HPL.dat for Beowulf Cluster [Linpack]

Hi guys, I am having some issues tuning the HPL.dat file for the Linpack benchmark test across 2 nodes. I am very new to this with minimal Linux experience, however i am trying my luck. The specs for the two nodes are: 3GHZ QX6850 CORE 2 EXTREME (QUAD CORE) 4GB RAM I have been typing these... (1 Reply)
Discussion started by: mercthunder
1 Replies

6. UNIX for Advanced & Expert Users

Benchmarking a new Solaris, with four different clients

Good morning, for the impatient: I have a new backup-server and need to monitor, what the machine can do, what's the best way of finding that out? I will tell the story right from the beginning, so you have a clue about what's going on: I have a setup of three machines: A new... (6 Replies)
Discussion started by: PatrickBaer
6 Replies

7. UNIX for Dummies Questions & Answers

benchmarking application

Where i get a open source benchmark program using pthread library for benchmarking our multicore system for the first stage.I need the source code too for that application ,because in later stage we need to develop our application so that i need to study pthread more. please anybody guide me . (0 Replies)
Discussion started by: sujith4u87
0 Replies

8. UNIX and Linux Applications

Benchmarking and performance analyzing in OS

Is/Are there an/some application/applications , package/packages for benchmarking or system performance measuring which are there for almost all Linux releases and distributions? (2 Replies)
Discussion started by: nixhead
2 Replies

9. Solaris

Sun cluster 4.0 - zone cluster failover doubt

Hello experts - I am planning to install a Sun cluster 4.0 zone cluster fail-over. few basic doubts. (1) Where should i install the cluster s/w binaries ?. ( global zone or the container zone where i am planning to install the zone fail-over) (2) Or should i perform the installation on... (0 Replies)
Discussion started by: NVA
0 Replies
rhosts(5)							File Formats Manual							 rhosts(5)

Name
       rhosts - list of hosts that are logically equivalent to the local host

Syntax
       /$HOME/.rhosts

Description
       The  file  allows  a  user  who has an account on the local host to log in from a remote host without supplying a password.  It also allows
       remote copies to the local host.

       If the file exists, it is located in a user's home directory.  It is not a mandatory file, however.

       The format of a file entry is:
       hostname [username]
       The hostname is the name of the remote host from which the user wants to log into the local host.  The username is the user's login name on
       the remote host.  If you do not specify a user name, the user must have the same login name on both the remote and local hosts.

       The  host  names  listed in the file may optionally contain the local BIND domain name.	For more information on BIND, see the Guide to the
       BIND/Hesiod Service.

       If a user is logged in to and wants to log in to a host called without supplying a password, she must:

       o    Have an account on

       o    Create a file in her home directory on

       o    Specify host1 ginger as an entry in the file.
	    If has the same login on both and she can simply specify host1 in her entry.  You can allow the superuser of a remote system to log in
	    to your system without password protection or perform a remote copy by having a file in the root ( / ) directory, but it is not recom-
	    mended.
	    In addition to having a file, the superuser needs a terminal entry in the file for each pseudoterminal configured in the system.   The
	    secure entry looks similar to the following:
	    ttyp3      none    network	       secure
	    See the reference page for more information.

Examples
       The  following is a sample file for the user It is located in her home directory on She also has accounts on the hosts called and Her login
       name on and is the same as on but her login on is

       To enable to log in to from and without supplying a password, her on should contain the following entries:
       machine1
       system1	gordon
       host3

See Also
       hosts.equiv(5), ttys(5)
       Introduction to Networking and Distributed System Services

																	 rhosts(5)
All times are GMT -4. The time now is 08:19 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy