General :: Find Out Latency To RAM Of Machine?

Sep 4, 2010

How do I find out the memory bandwidth/latency to RAM of the machine?

View 3 Replies


ADVERTISEMENT

General :: Find The Remote Machine Name?

Aug 14, 2009

I want to access the remote machine I already login, but I forget the machines name, how can I find the machine name then?

View 3 Replies View Related

General :: Test Latency / Communcation Between Two Cores?

Feb 17, 2011

I have a four-cores machine (core1,core2, core3, core4 ). I want to test the communication or latency between two cores (for example, core1 and core2; core3 and core4). Does anyone know how to write a code to test it under linux operating system?

View 1 Replies View Related

General :: How To Measure Interrupt Latency Using C In System

Apr 22, 2010

Program code as how to measure interrupt latency..

View 2 Replies View Related

General :: Find The Location Of A Package On A Machine?

Mar 4, 2011

I am trying to find the location of a package on my linux machine. There are several commands that i have tried like 'rpm -ql kernel-headers-2.6.32-71.18.1.el6.x86_64' but this is no good.

I also tried the following command 'rpm2cpio kernel-headers-2.6.32-71.18.1.el6.x86_64 | cpio --list! But I get a msg saying "kernel-headers-2.6.32-71.18.1.el6.x86_64: No such file or directory"So I decided to download the rpm and when I tried to install it I get "package kernel-headers-2.6.32-71.18.1.el6.x86_64 is already installed"Is there any way I can find out the location of this file??? It is not in any of the /usr folders (bin, lib, lib64, include etc...)

View 14 Replies View Related

General :: Netem For Mac OS X To Emulate Network Latency And Dropped Packets?

Aug 9, 2010

I'm looking for an open source/free network emulator tool that I could use on Mac OS X, to simulate a slow network connection, limited bandwidth and other network characteristics such as dropped packets etc for both UDP/TCP connections (or even on the physical layer).

I'm looking for the simplest solution that would allow me to run TCP/UDP servers and have a few clients connect to them on localhost emulating various network connections. I'm mainly wondering if I can use something like Linux's netem on Mac OS X (or even better cross-platform Windows/Linux/Mac). Perhaps I can run VirtualBox and a Linux kernel running netem, has anyone had luck with that?[URL]...

View 2 Replies View Related

General :: Networking - Command Line Tools For Analyzing OS - NIC TCP Latency

Sep 14, 2011

I'm hoping to find an existing Linux tool for measuring latency:

I'm trying to diagnose how much latency my OS and NIC card are adding to TCP latency in Linux. I looked at the following tools but all (at least at the surface level) measured bandwidth (Mbps/sec) rather than latency (nanoseconds for transmition of 1 packet of size x).

If I were to write a custom test, it would likely do the following:

Client:

Create a fake message of the specified length with some padding for an incrementing identifier. Open a TCP connection (with the right parameters like TCP_NODELAY, etc) Loop and send messages containing an incrementing identifier. Store the current system time (in nanos) associated with the identifier. Listen for responses, record the current time and record the latency of that identifier asynchronously Server Listen for a connection Echo back any message received

Assuming both boxes had the same setup (configs, cards, OS, CPU, etc), are relatively close to eachother in the network, and one knows roughly the network's latency contribution, one could get a rough estimate of the OS + NIC contribution and begin testing various configurations.

One could also get a more accurate picture of the latency by using a network sniffer and snooping on the lines between the two hosts, calculating the latency between the two sides for an ID, and then subtracting that from the internally measured latency.

View 3 Replies View Related

General :: Calculating Handoff Latency In Mobile Ipv6 Environment

Nov 30, 2010

i have installed ns 2.33 and added the patch mobiwan for supprting mobile ipv6. i ran some tcl scripts , and below is the trace file generated. calculate the handoff latency, and if someone has awk or perl script to do so, tcl file [URL] out.tr [URL]

View 1 Replies View Related

Hardware :: CAS Latency For AMD Phenom II Overclocking

Jun 12, 2010

I'm getting close to ordering the components for a new machine based on the AMD Deneb quad core and had one last question.I'd like to try a little careful overclocking, not only for the performance increase but also to learn how. Nothing extreme, no gaming, just whatever I can get with good stability with the stock heatsink and fan.I was going to get 8GB on 2x4GB strips but they are all CAS latency 9. The MB has 4 slots for a total of 16GB capacity. Would I be better off going with 4x2GB strips and try to get a lower latency strip like maybe 7?

View 5 Replies View Related

Hardware :: How To Find Unix Machine

Jan 5, 2011

Is there any UNIX coomand to find the unix machine type (like whether the machine is belongs to Sun ultra 45 type) like that .

View 3 Replies View Related

Debian :: Finding Advantages Of Low Latency Kernels?

Feb 26, 2011

As I am trying to understand if there are any advantages using a kernel optimized to have low latency for the desktop, it would very helpful if anyone using one could give me his opinion. I read about the liquorix kernel and found a controversy and used google to find more information.

View 2 Replies View Related

Debian :: Get Latency Down When Calling Aptitude And Dpkg?

Jun 20, 2011

I tend to use commands like 'aptitude search $something' or 'dpkg -S /usr/bin/command' (some command/variable in both) or 'apt-file search $something' and all/or many of its brethen. I do run updatedb every now and then but that command is for the overall health of the system similar to tracker perhaps (but not running continously like tracker and the daemon).

What I'm looking for is, if there is a way to get the package list (installed and otherwise) updated aggressively so that whenever I use any combination of aptitude or dpkg I get better response from the system. From what little I understand, aptitude or dpkg or somewhere there would be some sort of index/database where the current state of package availability and system state would be recorded. If there is a way that this could be improved upon would be nice to know. If there is some experimental package or road which the debian folks are looking for in the future so this latency can come down.

View 5 Replies View Related

OpenSUSE Multimedia :: Realtime Or Low-Latency Kernels For 11.4?

Jun 28, 2011

is there a realtime or low-latency kernel in a repository somewhere for OpenSUSE 11.4? I know I can just compile a rt kernel, but that's a bit tedious and I'd like to avoid it if possible.

View 9 Replies View Related

Ubuntu Networking :: Long Latency On LAN Between 10.14 LTS Servers

Jun 8, 2011

we are setuping high-performance web farm with 4 ubuntu servers (all 10.14 LTS 64bit, i5Core CPU, 16GB Ram). One server is "database" server with mysql installed, three servers are "webservers" with tomcat installed. All three webservers have public IP and are connected directly to internet by eth0 (onboard network card) and are connected to switch that is connected to database server by eth1 (pci network card). All servers has stardard instalation with no special modules/programes installed.

Web servers are already under load, but only on about 10 requests/minute. After several hours in production, strange thing happened - one of the web servers (each time another one, so it is happening to all of them but not at once) starts to have pings to database (that is connected directly on LAN) = 100ms (other two servers still has like 0,02ms). Pings stay high until we do /etc/init.d/networking restart, after that it is fixed and pins are again low again. Another strange think is, that when we let ping running for some time, it is slowly dropping from 100ms to 1 ms and then again jumps to 100ms (exactly to 100ms always) and again starts dropping - so it is cycling over and over again (one cycle takes about 2 minutes).

We were trying reconfigure network, play with switch (the same situation was happening even without switch when there was only one webserver and one database server directly connected), disable IPv6 but nothing helped. The only thing that we discovered is that it has to be caused by network configuration.Do you have any idea what can cause it? We went through systems logs but found nothing suspicious (at least according to our understanding).

View 3 Replies View Related

Ubuntu :: Terrible Sound Latency With Some Programs

May 15, 2010

It's an eMachines T2899 desktop, FIC AU31 motherboard, nForce2 chipset, AC97 sound (integrated), running Xubuntu 10.04 (wubi install), 2.6.32-22.I've got terrible sound latency (about one second between actions and sound) in some programs.Flash in both firefox and chrome (including ..... videos) and ZSNES (SNES emulator) are two offenders, as is Audacity.Videos played in the default "movie player" and VLC play with no delay, though.I've been told it could be an issue with the ALSA buffer size, or pulseaudio introducing latency... but I've no clue how to go about fixing it.Upon using the SNES9X emulator (which allows for choice of sound system)... Portaudio causes laggy emulation and bad sound latency. Open Sound System plays fine. SDL causes laggy emulation and bad sound latency. ALSA plays fine. Pulse Audio plays fine."sudo apt-get remove --purge pulseaudio" did nothing, so I reinstalled it just in case.

View 4 Replies View Related

Software :: Program To Measure Disk Latency?

Feb 17, 2011

I'm looking for a program that can measure disk latency. I would prefer one that could do it on a raw device. Also reporting average and max latency would be a plus.

Anyone know a program that can do this?

View 1 Replies View Related

Red Hat / Fedora :: Find Out Such Info Of A Remote Machine?

Jan 21, 2010

I am trying to compile some thing on a remote machine, need to know following infomation:

1. machine:
2. CPU type:
3. Operation system:
4. Fortran compiler:
5. C compiler:

Where do I look?

View 3 Replies View Related

Security :: LAN Hacked - How To Find Infected Machine

Jul 3, 2009

I have LAN with 20 machines. I see that one of them is infected. Its sending a lot of packets to the internet. My internet connection at this momment is realy slow. What should I do? How to detect which machine is infected? I'm using hardware firewall. Fortigate... Its hard to configure there nice logs. Any good software. I don't want to switch off network cable from each machine and check.

View 10 Replies View Related

General :: Transfer Files On A Machine With Ftp / Sftp And Scp Disabled Onto A Remote Machine?

Nov 30, 2010

How do you transfer files on a Linux machine with ftp,sftp and scp disabled onto a remote machine

View 2 Replies View Related

General :: How To Configure Serial Port Of Virtual Machine With Host Machine?

Jul 29, 2009

I successfully installed the virtual box on my fedora 8 system, and also created a virtual machine with windows xp OS, it works nicely, I try to configure the serial port of my virtual machine and try to configure the path for the port "screen shot are attached" it gives me the error message also the "screen shot are attached" for your review.Is kind of mistake is going on during the path setting, and how to set the path for configuring the serial port of my virtual machine so that I can use the hyper terminal tool of windows.

View 4 Replies View Related

General :: Transform A File On 1st Machine With A Tool On 2nd Machine In One Line Over Ssh?

Jul 14, 2011

I have some file tools on a mint machine that I would rather not install on my mac laptop. Mainly because of the vastness of apt-get and the low risk of installation failure. Anyway, every so often I have a file that I want to process in place using some remote tool. Both machines can ssh right in to each other so I was figuring there must be some script or tool out there that would allow me to type out something like remote [file] [tool & args] to send my file to the other machine, get it processed, then get it back.

View 4 Replies View Related

General :: Setup A Machine Running Drupal CMS On A Debian Machine?

Aug 13, 2010

I'm know very little about Linux but decided to set up a machine running Drupal CMS on a Debian machine and it won't go. The folks at Drupal have tried to help but it seems the Debian OS won't do it's PHP thing for Drupal.

That means i'll have to start at the START I guess.

how to become a master of Linux if one is starting from ABC (I can add and subtract, that's what it feels like)

View 2 Replies View Related

Fedora :: Jbd2_log_wait_commit Showing Huge Latency In LatencyTOP?

Aug 4, 2011

My large ext4 / filesystem seems to cause huge latency problems when writing a large file. For example, if I use split to break up a 40GB file into DVD-sized chunks, my browser becomes unresponsive, and it can take several seconds for Gnome terminal to respond to a mouse click.

I installed LatencyTOP, and it shows jbd2_log_wait_commit as the big offender, with Chrome waiting on that function for over 31000ms (or 31 seconds). I tried remounting / with barrier=0, but that didn't help. My hard drive is a WD20EARS-00MVWB0 2TB SATA disk. I recently switched my BIOS from IDE emulation to AHCI mode, but that didn't help. I tried running split with ionice, and that does help, but the system still isn't responsive as it should be, and I'd hate to have to remember to ionice every large write. Here is some relevant stuff from dmesg:

Code:

[ 1.294068] ata3: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 1.294096] ata2: SATA link up 3.0 Gbps (SStatus 123 SControl 300)
[ 1.294119] ata1: SATA link up 3.0 Gbps (SStatus 123 SControl 300)

[code]....

I'm running kernel version 2.6.38.8-35.fc15.x86_64.

View 3 Replies View Related

Hardware :: Eliminate Or Reduce Mic Input To Speakers Latency?

Mar 7, 2010

I have a Macbook running Ubuntu Karmic and I have been asked to DJ (amateur to the MAX) a friend's wedding next weekend. I don't have the coin to spend on a Mixer so I can run my mic and laptop through my amp so I figure I'd just run the Mic into the mic input on my Macbook and let the laptop do the mixing for me.Well, I added the loopback module to Pulse and inserted a command to have it auto start:

Code:
pactl load-module module-loopback
Code:

[code]....

View 5 Replies View Related

General :: Access Windows Machine Through System Machine?

Aug 3, 2010

I'm the Administrating the computers in my office. I want to monitor the user's activity. How can i remote login without distrubing the user's activity on his computer? Any software need to be installed? (I don't want to use Terminal server client).

View 5 Replies View Related

Ubuntu :: Low Latency And Realtime Kernels Boot To A Command Prompt?

Oct 12, 2010

I just installed Maverick Studio on a new hard drive, and am using an NVIDIA GeForce 7300 LE GPU. If I boot into the 2.6.35-22-generic kernel, everything runs fine, but if I try to boot into either the 2.6.35-20-Low Latency, or 2.6.33-29-Realtime kernels (installed from Synaptic), the computer boots straight to a command prompt instead of the desktop. Does anybody know what causes this? I need to be able to use one of these kernels for doing music production.

View 1 Replies View Related

Ubuntu Networking :: Massive Latency/unreachable On Wired Network?

Dec 15, 2010

I'm experiencing massive latency/unreachable problems on my Linux machine. It's true for all network connections, here's an example of me trying to ping my router:

PING 192.168.0.1 (192.168.0.1) 56(84) bytes of data.
64 bytes from 192.168.0.1: icmp_req=1 ttl=64 time=15115 ms
64 bytes from 192.168.0.1: icmp_req=2 ttl=64 time=14107 ms
64 bytes from 192.168.0.1: icmp_req=3 ttl=64 time=13107 ms
64 bytes from 192.168.0.1: icmp_req=4 ttl=64 time=12107 ms
64 bytes from 192.168.0.1: icmp_req=5 ttl=64 time=11108 ms

[Code]...

I've tried now with both the maverick default kernel and 2.6.37-rc5 kernel (both 64 bit), same result. If I take the card up and down (ifup, ifdown) performance is restored for a little while, then it's back. I've tried changing cable, network card and router port but no luck.

View 4 Replies View Related

CentOS 5 Networking :: ICMP Ping Latency Grows Over Time

Apr 20, 2011

I have a dedicated host on my lan to monitor other hosts/services using Nagios. I'm in the process of migrating to Zabbix on that host to perform the same purpose. Both Nagios and Zabbix monitor icmp ping latency (Nagios uses ping, Zabbix uses fping) and over time the latency to other hosts grows until threshold alarms are triggered. In one week, the average latency grows from sub-millisecond to over 100 milliseconds, and continues to grow until the Nagios host is rebooted. I have verified the latency numbers using ping/fping from the command line on the Nagios host.

The problem is that pings from the monitored hosts to the Nagios host show normal latency at the time the Nagios host is showing high latency from itself to the monitored hosts. The Nagios host and monitored hosts are all connected to the same Dell 24 port gigabit switch. I already posted this question on the Zabbix forums with a graph of the latency but there were no answers. [URL] why the icmp ping latency is growing over time and how I can fix it short of rebooting the host on a schedule.

[Code]...

View 5 Replies View Related

Debian Multimedia :: Cannot Find A Suitable Screen Resolution On A Ppc Machine

Apr 18, 2011

I am running Debian on a g3 mac and when I set the screen resolution to 1024 by 768 I cannot see everything, for instance the scroll bar on iceweasal is hidden, so I switched the resolution to 800 by 600 and then i load up evolution and find that the forward button isn't visible, is there a way to get a custom resolution that works with everything

View 10 Replies View Related

Fedora Networking :: Find The IP-ADRESS Of A Machine Using The MAC-ADDRESS Within A Subnet?

May 20, 2009

Is there any tool or command where I can track down the IP-ADDRESS of a machine within the subnet using its MAC-ADDRESS .

View 11 Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved