Software :: Measuring Network Throughput
May 15, 2010I want to know the actual maximum throughput of my lan at home.Could you suggest some free monitoring tools for me to use
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Hardware :: Measuring A Case Fan?
Mar 30, 2011This is probably a simple question but I really don't know!How do you measure a case fan to know it's true deminsions whe one is talking about them or whatever?For an example lets use an 80 mm fan, is it measured from the "Frame" size witch is the total size of the fan or what?
View 14 Replies View RelatedUbuntu :: Measuring The Time Of A Code?
Sep 20, 2010I am a beginner to C and C++ and so far I have learned two ways to measure the time my program takes to run.
Method 1: Just compile your C file and if the executable is say a.out just type time ./a.out
Method 2: Here the general structure of the code is
Code:
#include<stdio.h>
#include<time.h>
int main(void)
[Code]....
Question 1 Do Method 1 and Method 2 return the same times?
Question 2 Method 1 gives three times real, usr and sys . Is it true that USR+SYS= TIME GIVEN BY METHOD 2
I have performed some experiments with small codes which return the squares of numbers uptill 36000 and I feel the answer to question 2 is yes
Ubuntu :: Measuring Power - Watts?
Apr 11, 2011I was wondering if there is a way to see how much power my computer is using while using Ubuntu. I know there are hardware devices, plugs, I can use but I didn't know if there was a computer program that I could use that would do the same thing. I am currently using an IONITX F-E, 2Gb 800mhz RAM, 6 Green WD 2TB drives, and plan on getting a blu-ray drive installed in the last slot. I am also using a PCI-E x4 SATA card, and using software raid 5. I have a 350 watt psu installed and would like to remove it and install a pico-psu but the pico seems to max out at 200 watts.
View 2 Replies View RelatedHardware :: Ways Of Measuring FLOPS
Sep 25, 2010I've found various programs and methods to measure FLOPS, but I don't seem to understand them. What is wrong with the following?
test-flops.py
Code:
#! /usr/bin/env python
float_increment = 1.03 # random
start = 57.24 # random
floating_point = start
for i in xrange(10 ** 6):floating_point += float_increment
Code:
PROMPT$ time ./test-flops.py
As far as I can see, this times a program that performs 1 million FLOPs (namely incrementation).
This outputs about 1.2 seconds on my (reasonably fast) machine, giving 840kFLOPS, which is much too low.This post may be in the wrong section; a C translation increments the result by three orders of magnitude (ie, py sucks), but this is still considerably less (~ 7-fold) than published values.
Software :: Measuring Boot Time
Mar 19, 2009I am using a simple plain Debian Lenny base system (No X). I would like to measure how many seconds my system takes to boot - time between hitting enter key on GRUB screen to login console on tty1.One obvious way is to measure it manually by looking at your wrist watch or an external timer but I would to measure it more accurately - something that is built inside the Operating System.
View 5 Replies View RelatedProgramming :: Measuring Microseconds With Linux
Oct 27, 2010I need to measure the time it takes for a program I'm writing to do Its job in microseconds resolution. I'm using Ubuntu 10.10. My Idea is, to write a device driver that directly reads the counter that produces the interrupt of RTC ticks. How do I do this, for a Linux kernel and a PC hardware?
View 4 Replies View RelatedSoftware :: Measuring Time Elapsed In A Program Gcc And G++
Jul 7, 2009I've done a lot of googling for this, but always found code that does not work on my compiler.Could anyone please post a small (working) program through which I can store the starting time of the program (milliseconds) and get the ending time of the program in integer variables?Am working on Fedora 8, and with the gcc compiler.
View 2 Replies View RelatedSoftware :: See The Tps Or Throughput Of Any Machine
Aug 4, 2011i want to know the throughput of my pc after i enable RFS and RPS configuration. how to calculate tps or how to see throughput ......
View 1 Replies View RelatedRed Hat / Fedora :: Calculating The Throughput Of A Server?
Feb 21, 2011I have read many articles on hdparam to calculate the disk read and write speeds and some on interface and CPU limits. But is there a structured way of calculating the maximum throughput of a server including all the subsystems. Like storage, CPU, network, memory and so on? So that I can create a script that i can run on a newly installed Linux machine and calculate the maximum throughput .
View 4 Replies View RelatedNetworking :: How To Check Bandwidth - Get Value Of Throughput
Apr 15, 2011My objective is when the throughput is increase my shell script is Print a message. But the Question is how to check the bandwidth.
View 1 Replies View RelatedDebian Installation :: Measuring System Of Installer (JEDEC Or Metric)?
May 11, 2015What measuring system does partitioning step in Debian installer use - metric or JEDEC? I.e. it uses MB, which in JEDEC means 1024^2 bytes, and in metric means 1000^2 bytes.
View 3 Replies View RelatedGeneral :: Measuring Time That A Program Is Running In Shell Script
Nov 11, 2010I have a script that executed 100000 C Programs, reads the commands from a file and executes them. There is a requirement to measuer the time that each of this 100K C programs running.If it exceeds 120 sec I want to Kill that Process.Any Idea to embed this in my shell script?
View 4 Replies View RelatedNetworking :: Total Throughput Of A 100mbps Line?
Nov 14, 2010Lets assume we have a 100mbps connection between two servers in same switch. then How much is the total throughput of the connection between servers. For example if I am downloading with 70mbps from other server , do I still have 100mbps upload BW available ? or 30mbps is available ? in other words for a 100mbps connection , the limit of download+upload is 100mbps ? or we have 100mbps download and 100mbps upload available ?
View 12 Replies View RelatedUbuntu Networking :: Iperf Throughput Test Between Two NIC'S?
May 30, 2011I have pc with two NIC's (eht0 and eth1). I want to test throughput switch/router.I can ping on both interfaces.Connection Diagram:
eth0 -> Patchcord -> testing devices -> Patchcord -> eth1
I run two iperf:
-s -B 192.168.1.10 (eth0)
-c 192.168.1.20 -B 192.168.1.20 (eth1)
Results:
[ 3] 0.0-10.0 sec 4.45 GBytes 3.82 Gbits/sec
The test results are false because I use 100Mb/s NIC's. I can't use two pc's for test.I tried to do the same test under windows 7 x64 it and works properly, but under windows xp there occurs the same problem like under ubuntu.
Ubuntu :: Slow USB Throughput After Natty Update?
Jul 7, 2011I accepted the latest Natty update about which I was notified a couple of days ago (I don't remember exactly). I don't remember a new kernel being pushed out, but for the record I'm on 2.6.38-8-generic right now. I'm trying to interact with a USB compact flash reader and I'm getting ridiculously low throughput (less than 1 MB per second). Before this latest upgrade, I don't remember this being a problem.
Better yet, does anybody know what might be wrong and what I might be able to do to fix this?
Server :: Enable Buffered I/O For Increased Disk Throughput?
Sep 1, 2010How do I enable buffered I/O for increased disk throughput on Linux ?
View 3 Replies View RelatedUbuntu Servers :: Lucid Slow Throughput To Windows Machines
Jun 16, 2010Having finally got Samba shares and printer shares working on my Lucid Lynx server, I've noticed that the throughput from/to those shares is very slow to what I was used to when I had those shares on a W2K server.Having Googled this problem, I noted that there was a known issue with this in Karmic (believe Brian Wu was looking at it). However, I don't see any results in Google as to this being a problem in Lucid.
I know ipv6 can cause a problem in this regard but having issued the command:
lsmod | grep inet6
I know that ipv6 is indeed disabled on my Lucid server. Any further information on whether the error reported in Karmic still applies in Lucid, and can this be addressed in any way?
Networking :: Tuning For High Throughput Reverse-proxy Server?
Jan 18, 2011I have an enormous quadcore machine with 16gb ram and dual gigabit NICs. It used to be for MySQL but we have upgraded the whole database infrastructure so now this server is left floating. I had the great idea of turning this into a reverse-proxy (using apache mod_proxy) and it really handles a ton of requests. But I have a feeling that we are not getting the most use out of what it can offer.
Our traffic consists of a few thousand very small (less than 10 byte) ajax calls per second, and frequently I find we are running out of kernel allocated network stack to handle all the requests. Often we get the kern.log warning "possible SYN flooding on port 80. Sending cookies." and other things like this. Obviously we are not getting SYN flooded, we just have very high demand.
So far I have found a few kernel tuning guides to tell the kernel to allocate more of the base system memory for networking but every guide I have found has been for the purpose of increasing the performance between WAN links (direct backbones between offices etc) and usually with very large file sizes being the priority. One such example (and great) write up is here:
cyberciti.biz/faq/linux-tcp-tuning/
I was hoping some people could provide further input, such as along the lines of disabling nf_conntrack (to speed up socket set up/tear down time) or anything that will speed up a high throughput proxy like mine. Any links to studies or benchmarks between different configurations or hardware gets extra points!
Server :: Generate Very Large Files And Simulate A Consistent Throughput To The LUN
Jul 6, 2010I have a test RHEL5 box, sitting in a brand new Dell blade rack on a PowerEdge M610, with a lovely Emulex OCm10102-F-M FCoE card connected to a Cisco Nexus 5000 switch. The whole setup is extremely new (the cards only recently became available for purchase.) We've finally worked with Emulex to get the cards functional, and we are ready to some stress testing to the SAN. My question now is, is there a good tool I can use to generate a large amount of traffic to a LUN? The Wintel team used a windows-only tool that showed an average of 6gigs/second throughput, so I need something that can generate very large files and simulate a consistent throughput to the LUN. I found iozone, but I'm having a devil of a time with it.
View 2 Replies View RelatedOpenSUSE Wireless :: Painfully Slow Wireless Throughput On Atheros AR5001 Card
Aug 12, 2010I have a Acer Revo R3610 nettop on which I installed oS11.3. It has an Atheros AR5001 wireless network adaptor.I'm getting very bad latency and throughput on with this card. In comparison my Thinkpad with Intel card achieves at least 10 times the throughput from the same location. Also when I boot my wifi will come up authenticate and then a few seconds later disconnect and reconnect. I've tried updating the kernel to 2.6.35 as one of the fixes was to improve the performance of the ath5k driver. I'm using wpa2 authentication.
Here are some details:
Code:
mediacentre:~ # /sbin/lspci -nnk
00:00.0 Host bridge [0600]: nVidia Corporation MCP79 Host Bridge [10de:0a82] (rev b1)
Subsystem: Acer Incorporated [ALI] Device [1025:0222]
[code]....
Is there anything else I paste that will help determine the cause of the bad throughput. Browsing the web or copying files across the network is bordering unusable.
Software :: Software Raid Not Showing Increased I/O Throughput On Fedora 12?
Mar 27, 2010I have implemented level 5 software raid (of 4 partitions on a SINGLE external hard disk). Implementing it on a single hard disk doesn't serve much purpose, I understand, but I did it for demonstration purpose only. The problem is when I read from the raid device into my laptop's hard disk, the time taken to transfer a 900 MB file is about 4 minutes (4 GB RAM) whereas the rime taken to transfer it from a pen drive is 43 seconds. Isn't raid supposed to work faster. However, the write to the raid device is faster than to a pendrive. Shouldn't it be taking data in parallel from the 3 partitions (as even a single disk has multiple heads) ?
View 2 Replies View RelatedOpenSUSE Network :: Can't Find Network Hard Driver On Network?
Oct 31, 2010On Linux Mint (Gnome) i used to go to Network drive. that is on the right hand side of Nautilus there is a short cut for Network. in there i could see my network hard drive and other laptops connected to the network, and i could access my files. but on OpenSuse, when i open the network folder, nothing comes up. may be it needs some sort of configuration.
View 2 Replies View RelatedOpenSUSE Network :: Find Out Network Usage / Keep Track Of Total Network Usage?
May 24, 2010How do I find out the network usage ie the total amount of data is transferred in or out of my computer (openSUSE 11.2 and gnome) and keep a track of the total network usage?
View 1 Replies View RelatedOpenSUSE Network :: Connect To A New Network It Use The Name Of The Last Network
Jan 3, 2011When I try to connect to a new network it keeps trying to use the name of the last network I connected to. This has just started happening in the last two months.
View 9 Replies View RelatedFedora Networking :: Open The Network Device Control To Activate It But There Is No Network Ports In Network Device Control?
Jan 7, 2010I just added a 2 port network card to a system that is running Fedora 11, but it is INACTIVE. I open the Network Device Control to activate it but there is no network ports in Network Device Control. It is empty.It looks like the system recognize the card and loaded correct driver.
View 4 Replies View RelatedFedora Networking :: Setup The Network Scripts To Create Two Network Interfaces For Vlan X And Y?
Apr 7, 2009Using Fedora 10, can anyone tell me how to setup the network scripts to create two network interfaces for vlan x and y. Both interfaces should obtain an ip from dhcp and both interfaces should run over eth0.
View 2 Replies View RelatedOpenSUSE Network :: Create A Home Network To Share Files - Scanner And Printer
Dec 31, 2009I have four PCs in my house that are running opensuse 11.2 and I want to create a home network to share files, scanner and printer.
View 4 Replies View RelatedOpenSUSE Network :: Network Login Starter - Set Up A Server - Centralized Username And Password
Jan 21, 2010I'm new to networks and servers, been using Linux on the desktop for a while now but always relied on the company's IT guy for setting up everyting LAN-based.
Now I want to build up my home LAN, and want to do it with Linux. I've managed to set up LAMP and file share servers.
What I am looking for is information on what I need, and how to set up a server for the following tasks:Centralized Username and Password, that when the user logs into any one of the desktops in the LAN, it uses this for authentication
Something that allows this authentication to be utilized in other servers (file access, web access, router logging, etc.). Something to make it easier for continuing permissions from one service to another. e.g. I have IPCop filtering content, and it has provisions for tracking who is making which request if there is authentication going on. (optionally) to run a script for mounting Samba shares or mapped network drives so from one system to the next. For example, in whatever box somebody logs in, it mounts a server share ("smb://Myserver/users/<username>") to a local folder ("my_user_share").
So;user "fred" ="smb://Myserver/users/fred" and user "wilma" = "smb://Myserver/users/wilma" but both would find their respective one mounted under "~/my_user_share". This would be irrespective of which box they are loggin in with. If the server share location changes (new server/servername), I change it on the server so the next time they log in it points to the right place.
I guess it is similar to Window's Active Directory, though I'm not sure what it's called, how to configure it and what it is and is not capable of doing.
OpenSUSE Network :: Create A Gateway Server That Allows Virtual Private Network Connections?
Feb 26, 2010I have openSUSE 11.2 installed and i need to create a gateway server that allows virtual private network connections. I want to play with my friends some lan games, but we are in different networks, so i want to create this gateway server so we can connect with VPN clients to this server and play freely.
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