IO or I/O is a common shorthand for referring to Input and Output

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27
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3answers
30k views

How to change I/O priority of a process or thread in Win7?

Process Explorer is able to show the effective IO priority of a given thread, but not change it. Seeing as IO priority support is a comparatively new feature, most programs don't set their own IO ...
4
votes
2answers
1k views

When a disk read or disk write occurs, where does the data go?

I understand that there is such a thing as a disk controller which contains a buffer, but was wondering if the CPU reads directly from this buffer, or whether the data must first go to a specific ...
32
votes
2answers
14k views

Linux: Is there something similar to “top” for I/O?

My disk often is utilized, but top (and htop, a custom replacement) show nothing suspicious. Is there a way to sort processes by I/O (more specific: disk) utilization? EDIT Found out using iotop ...
34
votes
4answers
31k views

How do I find out what processes are accessing the hard disk in a GNU/Linux-based system?

I'm looking for the equivalent to top for disk access, so I can tell which process(es) are currently reading and/or writing to disk. I'm currently using Ubuntu, but I imagine there's a standard tool ...
26
votes
4answers
102k views

Windows 8 extremely high disk usage and slow IO

Problem After upgrading from Windows 7 to Windows 8 Professional, there seem to be a few disturbing problems. When I have the Task Manager open, I sometimes notice the disk usage climbing to 50, 75,...
11
votes
2answers
10k views

Difference between port mapped and memory mapped access?

Can anyone explain what's the difference between port mapping and memory mapping, and what having both accomplishes? Why is there port mapped, how does it differ in structure from memory maps, and is ...
8
votes
7answers
2k views

What's making my disk thrash in Windows XP?

I have a sick Windows XP laptop; something's making the disk thrash and the entire system is sluggish to unresponsive a few minutes after boot. How do I figure out what is making the disk thrash? Task ...
1
vote
5answers
845 views

How can RAM contain a “memory map” if RAM is unaware of the overall system?

This question concerns hardware more than software. Basically, citing from this article on memory maps, it says that: In computer science, a memory map is a structure of data (which usually ...
3
votes
1answer
2k views

Is it bad if millions of files are stored in one NTFS folder?

I have a very large NTFS volume with more than 20TB capacity and containing millions of files. If I put all of the files in the same folder, I know the performance is bad when I open the folder in ...
3
votes
1answer
6k views

How to limit disk usage (Write/I/O) by application? (NOT space usage)

I'm really annoyed by not being able to do a few jobs at a time even if I have plenty of RAM and CPU left to utilise - so it's the disk usage, for example when I am extracting big archives using ...
1
vote
1answer
725 views

Cost of disc I/O read versus write [closed]

Is writing to a disc more costly operation then reading from a disk. For example - writing a 1 GB file of records as compared to reading the whole file.
0
votes
0answers
43 views

How can I process traffic between 2 instances of NetCat?

I have an utility that make some data transformation between stdin and stdout in both directions (encode / decode), and I want to make a some kind of bi-directional proxy using two nc instances and ...
0
votes
1answer
105 views

Why is my System process doing disk IO?

Sometimes I want to see how much of my resources a program is actually using. But it seems that, often, even though the process is doing a lot it's for example hardly not doing any disk IO at all. The ...
0
votes
1answer
173 views

Windows are unresponsive for a few seconds after boot (probably IO error with HDD)

When Windows is loaded and I am logged in into my desktop, the system gets unresponsive for about 10-15 seconds. During this time, the HDD led indicator at the case is either flashing or on (solid). ...