Super User
Super User

Questions tagged [measurement]

39 questions
35
votes
6 answers

How do I tell the dimensions of the current selection in GIMP?

Oftentimes, I need to measure the dimensions of part of an image (in pixels). In Photoshop, I can make a rectangular selection and see the dimensions in the "Info" window (or something like that). How can I accomplish this in GIMP? The only thing…
Big McLargeHuge
  • 810
33
votes
6 answers

How can I log my hard drive activity by program?

I am using Windows XP and am looking for a utility that can tell me the percentage of hard drive activity a program is using. Basically, I'm looking for something like Task Manager and its ability to show CPU use but for hard drive activity. …
Joseph
  • 2,239
8
votes
5 answers

Windows port of /usr/bin/time?

Is there a clean Windows port / version of the /usr/bin/time command in Linux (program to time the execution of a process)?
unknown
  • 277
8
votes
8 answers

Cable modem speed test

Are the popular speed tests (cable, dsl, etc) that are available accurate? if so, how? Also, it seems that they only measure download speed of one file and not responsiveness, latency, robustness, etc. Does anyone know how it should be measured? any…
ra170
  • 754
7
votes
1 answer

monitoring ISP bandwidth data

On Windows/Linux, what would be a way to run a sample measurement of the bandwidth that I have available? I need to run a measurement at periodic intervals. There are many website which will give you a measurement if you load the page in a browser.…
lurscher
  • 322
7
votes
1 answer

What units does `ps -o` report memory usage in?

I'm using a script - memusg - to report the peak memory usage of my rails app. The script uses ps -o to measure memory usage. My question is: what units does ps -o report memory usage in? The script can be found here. And, here is the output from a…
user2574255
  • 73
  • 1
  • 3
5
votes
1 answer

Command-line tool to measure how fast a file is growing?

Is there a command-line tool to measure how fast a text file is growing, in units of lines/second? For small-ish files, I can do something with watch and wc -l, but that measures the file anew each time. Usually I want to watch either a huge log…
Ken
  • 355
4
votes
1 answer

Measure sound input loudness on Linux

Is there a way to measure sound input loudness, specifically from a mike, in dB, on Linux?
Hex
  • 41
3
votes
1 answer

How am I exceeding USB 2.0 speeds on a USB 2.0 port?

I am writing files to a USB 2.0 drive from a RAM disk, that has a 256MB random filled file on it (created from /dev/urandom to stop the file being compressed too much). When I look at the speeds of the file writes which is output from dd, they are…
Yann
  • 239
3
votes
2 answers

Looking for a way to make a grid on the screen to help position elements

I'm working with CSS and at times it's hard to see if something's centred. Is there a program or some way built into a browser that I can make a grid appear on the screen? I'm using FireFox on Windows 7 but I'm willing to try a different browser.
Celeritas
  • 8,341
3
votes
2 answers

How to make ideal conditions to measure performance of my app on Windows 7

I want to measure performance of my RayTracer and I want to create some ideal test conditions on my PC. I am using Windows 7. Is there some application, which can turns the system into "measurement mode"? I mean, some scenes will be rendered…
relaxxx
  • 207
3
votes
2 answers

How reliable a measure of relative CPU Performance is MIPs?

I notice no marketing mentions MIPs, and its not mentioned in specifications for processors. How reliable is this statistic? By now we all know more Mhz and Ghz is not necessarily a good direct comparison
Tom J Nowell
  • 507
3
votes
0 answers

Different results for power measurement on ubuntu using powertop and energy_uj

I want to measure power usage of the whole PC in software on Linux. I've tried these two methods from here and here: using powertop: rm -f powertop.csv sudo powertop -q -t 60 -C powertop.csv cat powertop.csv | grep -i --color 'baseline power' using…
K.Mat
  • 131
2
votes
1 answer

How much power will my 1200W 80+ Gold power supply provide to system components?

I am a bit confused over the terminology and efficiency rating of a power supply. For instance, under 100% load my 1200W 80+ Gold power supply is listed to operate close to 88% efficiency. What does the 88% efficiency rating apply to: the power…
Steve Guidi
  • 745
2
votes
2 answers

RAM: unit of measurement for size

Just need it clarified with some references if possible, when I buy 2GB DDR2 RAM. Is the GB measured as gigabyte or gigabit?
rzlines
  • 7,678
1
2 3