For questions concerning computer, or computer-related, performance. Please include metrics in your questions.

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0
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2 views

Error on ubuntu server testing - “fio: first direct IO errored.”

I'm working on a VM to test caching algorithms. The tool I've chosen to push IO is fio (click for HOWTO) given its flexibility. What I don't understand is why running on this ubuntu server 14.04 image ...
-1
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0answers
9 views

Hosting VMs vs Having One Machine Do It All

My friend and I were discussing how to host our small server last evening and we had a minor debate on something and couldn't really find an answer. The argument was "Having one server do all the ...
21
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2answers
2k views

Why did adding memory significantly increase gaming performance on an AMD APU?

To be clear from the beginning, this is not a problem. This is just something that I really wanna know the secret behind. System specs CPU: AMD A10-6790K 4.0 GHz GPU: AMD Radeon HD 8670D ...
-5
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0answers
21 views

Deleting rows in MS Excel. Huge delay [on hold]

I am trying to delete 100K rows from 700K-row sheet. It has been more than 3 hours now. RAM 4GB, CPU 3.30GHz. Ram usage 68%, CPU 25%
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0answers
43 views

What specs should I upgrade on my laptop if I were to use it to play games? [on hold]

My laptop, Inspiron 1525, is SLOW. It is almost impossible to play Portal 2 and Portal 1 is laggy but still playable. I still managed to beat the game. Half Life 2 episode 2 is possibly even laggier ...
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1answer
64 views

Why does my computer run slow if it is not using most of its CPU or RAM? [on hold]

I have two machines - a relatively cheap laptop and a high end desktop. My laptop sometimes runs slowly doing various tasks that would be quick on my desktop. My first guess is that I'm using most of ...
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0answers
21 views

USB mouse incredibly slow on brand new laptop

Just purchased a Dell Latitude E6540 with a ~16" screen (Windows 7). The mouse is terribly slow, even after adjusting it in Mouse Properties (Pointer Options -> Motion -> Fastest). To move the mouse ...
0
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0answers
21 views

Weird phenomenon about my PC's primary & secondary DNS speed

I use DNS Jumper to test the speed of various DNS and this is the result: (A) Currently Using Primary: 203.144.207.29 (39 ms) Secondary: 8.8.4.4 (71 ms) (B) US Open DNS Primary: 208.67.220.220 ...
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2answers
16 views

The CPU visible in Resource Manager are physical cores or logical processors?

The Resource Manager that pops out from Task Manager in Windows Operating Systems shows CPU consumption on the CPU tab for each of the different CPUs. I get 4 CPUs on my tab. Are they all physical ...
0
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0answers
32 views

OpenGL rendering affects CPU

I have a problem with an app that is slowed down significantly when an openFrameworks based app is launched. Both apps use little cpu and memory, so i don't think there's a bottleneck. I can ...
0
votes
1answer
27 views

very slow internet connection

I have a netgear router and the internet strength says its excellent but when i try to play online on my xbox it is very slow and only have one bar connection. And i have noticed that when it goes ...
0
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0answers
13 views

what is the number of operations per cycle for the cortex a57 arm processor?

Im trying to figure out how many double precision operations per cylce a cortex A57 processor can achieve, according to this manual page, there can be upto three instructions per cycle delivered ...
2
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2answers
131 views

Does cable length factor in on component performance? [on hold]

This is completely hypothetical, and just something I've been curious about. I remember Grace Hopper on Letterman talking about correlating lengths of wire to nano seconds (a certain length of wire ...
-1
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0answers
31 views

Windows 8 Slow File Transfer (but 1gb sequential benchmark fine)

I'm using Windows 8.1. File transfers (between disks, over gigabit network) are limited to 10MB/s, but CrystalDiskMark 5x1000MB benchmark shows 139MB/s r/w speeds. I have no antivirus installed. File ...
69
votes
10answers
9k views

Are computers with more RAM potentially faster if not all memory is usually in use?

Let's say I have a computer with 16 GB of memory. If my computer is usually only using about 4 GB and never reaches 8 GB, is it any faster than a computer with only 8 GB of (the same type of) memory? ...
0
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0answers
43 views

Good lightweight linux distro that reduces battery consumption greatly? [closed]

I want to install Chromium Os, but i don't know exactly how much battery it consumes, or if it is lightweight and needs little hardware and is fast. Yes I'm aware Chromium OS is a web based linux, but ...
0
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0answers
30 views

How to improve the wifi performance of openwrt

If my computer download through my tplink router, the speed is 10Mbps, if through openwrt router, it's 5Mbps. Here is wifi information: root@localhost:/etc/config# iwconfig wlan0 wlan0 IEEE 802.11bg ...
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0answers
57 views

Sluggish Flash/HTML5 in Firefox 30.0

There are websites that have video playing back in the backround and removethebackground.com is one of those sites. This kind of effect slows browser's response almost to a crawl unless I switch to ...
1
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0answers
20 views

Linux: What is causing high interrupt activity for IRQ 23 (ehci_hcd)?

I run gkrellm to monitor my workstation. Total CPU usage usually runs 0-1% at idle; when there is activity, it's usually cyan-colored (user space). It was running clean this morning. A couple hours ...
0
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0answers
54 views

Obligatory reset after booting windows, afterwards periodical slowdowns apparent

Whenever I first boot up my PC it needs a hard reset, as it becomes unresponsive immediately after finishing loading Windows (the point where you'd expect to begin working). After this initial reboot, ...
1
vote
1answer
22 views

Inkscape very slow to start up on Windows

I've noticed lately on my Windows 7 x64 PC that Inkscape (v0.48.4) is very slow to startup. Once the window becomes visible it will display "Not responding" in the title bar for a minute or two. Once ...
0
votes
1answer
38 views

Understanding RAM vs CPU for basic tasks

I recently purchased a very cheap Android tablet; however, my question is actually device agnostic and my question applies to desktop PC's/laptops too. It had 1GB RAM and 1.2 GHZ processor. It ...
0
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0answers
11 views

Making windowed performance same as full-screen?

As you all well know, running software (let's say some demanding game) in a windowed mode drastically reduces the performance of the application (framerate), presumably because of the desktop, ...
-1
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0answers
38 views

Slow USB Transfer Speeds (USB 2 & 3)

I have recently purchased an Alienware 17 and I have all the current drivers from the Dell website but my USB 2 and 3 write speeds are very slow. My old computer which had lower processing power, ...
1
vote
2answers
45 views

Any realistic advantage of 802.11ac over 802.11n for a regular home connection?

I am using a 802.11ac Asus - 802.11ac Dual-Band Gigabit Wireless router. Don't have any complains yet but does it really matter to go from a $90 802.11n router to $200 802.11ac router? In theory, max ...
0
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0answers
57 views

Why does my PC slow down to a crawl when VMware and ntoskrnl.exe is writing to a data drive?

My PC becomes almost unusable when writing to my data drive. The main suspect which exhibits this issue is VMware Player. The problem does not happen when I myself move files in Windows Explorer or do ...
-1
votes
0answers
22 views

Linux healthy number of major page faults

I have a Solr process which has mapped 100 GB into virtual memory. When I run a load test on the query side, I read from /proc/<pid>/stat that the process has between 200 and 500 page faults per ...
1
vote
3answers
77 views

Available physical memory, XP

I installed a Windows XP x86 on my PC. But when I open the system information window in the System Summary tab, in the right-hand pane and at bottom the following are written: Total Physical memory ...
-1
votes
1answer
28 views

Investigating linux server slow down

We have a code build server, fedora 13, which was working at medium speed for 4 users. Speed means building a code branch took 1.5 hrs max duration. It was having one quad core, 8gb ram, 200gb hdd. ...
1
vote
1answer
30 views

Why does recording a game with Fraps decrease performance?

I've run into some performance problems whilst recording some gameplay videos for Youtube. As I understand, Fraps saves the current frame pixel for pixel in a video file (in a way similar to a RAW ...
-1
votes
1answer
40 views

Will overclocking my chipset increase the performance of integrated graphics?

My AMD Radeon HD 5830 recently broke (overheated because the fan stopped working), and I am currently attempting to run games on integrated graphics, on my chipset. Many games are responding slowly, ...
6
votes
1answer
4 views

Writing to subfolder is faster than writing to its parent

I use dd to measure write perfomance and observed something strange: writing to /data/emzed2 is faster than writing to /data. This is the way I measured the performance: $ dd if=/dev/zero ...
0
votes
2answers
64 views

CPU usage 99% constantly

My computer is running windows 8, and suddenly started running slowly. When I open the task manager, it tells me that the CPU is using 99% - sometimes the disk usages jumps up as well. The strange ...
2
votes
4answers
144 views

Slow Harddrive is Dragging the System

I have an HP Pro 3000 SFF running Window 8.1 Update 1 & Ubuntu 14.04 LTS. It uses an Intel G45s Chipset, a Hitachi HDS721050CLA362 500 GB harddrive, an Intel Core 2 Duo E8400 processor, and has 4 ...
1
vote
1answer
89 views

Why does my cursor speed slow down when my system is under intense network usage?

On some occasions of computer usage, my mouse acts very strangely. Whenever my computer is under intense network usage (i.e. watching an online video, downloading an application, patching a video ...
0
votes
1answer
24 views

Iperf network benchmark measures under-utilized?

I am working on two embeddded high performance network routers and I have connected them point-to-point via a 10Gbit optical fibre cable. I ran iperf benchmarks on them and when I connect through an ...
-2
votes
0answers
32 views

RAM being used…, by what? Who is eating my RAM? [duplicate]

since some days ago, my computer starts as normal but, as the time goes by, the RAM usage keeps adding up, until it reaches 75% of my RAM (+-9 GB, out of 12 GB). And what's interesting is this: ...
2
votes
0answers
18 views

Why do I get better performance on VMWare when I enable all cpus along with adding cpulimit?

I'm curious but at the same time also would like to share my findings of the increased gaming performance in VMWare by enabling all virtual cpus and limiting the VMWare process with cpulimit ...
0
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0answers
24 views

Windows will not open processes

I recently I come upon an unexplainable issue concerning my Windows 7 partition. When I woke up Thursday morning and logged into Windows, I discovered that it was acting really slow. It didn't take ...
3
votes
1answer
71 views

Is there a way to identify the busy (CPU-consuming) tab in Firefox?

Sometimes there's a nasty, guilty, CPU-hogging tab in Firefox that's maxing one of my CPU cores and making the whole browser sluggish. I'd like to find it and close it. Sometimes I get lucky, but ...
0
votes
1answer
55 views

Why does wmic tells my memory speed is 1333MHz, but Speccy says 665MHz?

I've checked my computer specs, and I saw I had memory in 1333MHz speed. I've checked it in wmic (see pic) and it's true. B ut i've checked it in Speccy (see pic) and it shows 665MHz. I've checked ...
1
vote
2answers
56 views

Does Windows still copy each file directly to disk, unlike Unix?

Unix was originally designed to perform file system operations in memory, and to update the disk blocks only every 30 seconds during sync. This resulted in a much faster user experience than MSDOS ...
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2answers
26 views

Is software like tune up utilities essential?

Is software like tune up utilities necessary? Can't we perform the tasks using some other free ware tools and built in windows tools?
0
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1answer
34 views

i7 (first-gen) running memory on 1066Mhz vs 1600Mhz - any performance loss?

I tried to read about this, like what is the actual difference, but I could not find any benchmarks or helpful posts. Most of them are simple placebo effects, like "oh my god the 1600mhz module made ...
0
votes
0answers
45 views

Slow File Transfer over Gigabit Network

There are a few computers connected to a computer (Windows 7 x64) via a Gigbait network in order to transfer file, however lately the transfer of files has been really slow (11Mb/s) I have already ...
0
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0answers
27 views

Strange SSD Response Time Spike

I have a Samsung 840 EVO 1 TB SSD disk. I am streaming data to this sequentially at a rate of 60 MB/s to four different files (15MB/s each) with the size 168GB (preallocated) each in a circular ...
0
votes
1answer
30 views

Recommended RAID5 stripe size?

I have a RAID5 array built from 4 1TB drives. I initially set the stripe size to 1M since I will be storing large files (much larger than 1MB). The NTFS cluster size is 64KB (largest possible). ...
0
votes
1answer
22 views

How can internet speed test applet not just show slow speed, but hang?

I have one internet connection, which works bad. It should be 80/20, but works much slower. Also, when measuring it's speed, speed test applet not just show slow speed, but HANG. How can it be ...
-1
votes
1answer
174 views

Google Chrome working incredibly slow

So recently I have received a new laptop for work. It's pretty decent, i5 with 4GB of ram and hybrid SSD hard drive. Google Chrome was always my default browser and it works painfully slow here, I ...
0
votes
0answers
43 views

Toshiba Satellite P850 - Freezing and Stuttering

I've about exhausted all my known options at this point. I own a Toshiba Satellite p850 which was new in 2012. The laptop frequently (several times per minutes) locks up or stutters the entire system. ...