The process of running a computer program to assess performance.

learn more… | top users | synonyms (2)

0
votes
0answers
42 views

What's faster: Running a Windows virtual machine on Linux or running a Linux VM on Windows? [closed]

I've searched the internet for this and I don't think I've been able to phrase the question concisely for any search engines, so I'm turning to people! I've got a laptop and I would like to know what ...
0
votes
0answers
19 views

How I can use Iozone to measure USB sticks?

I need to do some benchmarkings with various file systems (ext3, ntfs, ...) on a USB flash driver. I will format the USB stick every time to do the tests. The problem is I don't know how appoint the ...
0
votes
1answer
42 views

How to tell, before buying, if a given graphics card will play Full HD video?

I am looking for the cheapest video card that would be capable of smooth playback of Full HD (1080p) video on a Full HD screen. An answer by @Mikhail on a related question briefly mentioned that: ...
1
vote
0answers
85 views

Comparing an i7 (3.2Ghz) against an i5 (2.5Ghz) using linpack shows the i7 being worse

I am trying to compare the number crunching performance of an i5-3210M @ 2.5GHz with 6GB ram and an i7 970 @3.2GHz with 24GB ram. The results are so unexpected I presume I am either doing something ...
0
votes
1answer
41 views

Benchmark performance 30% speedup in mains over battery operation?

This observation arose as I was evaluating the running time efficiency of various implementations of a prime sieve algorithm. The surprise was finding that differences between the best algorithms was ...
0
votes
0answers
17 views

Is there a way to run a job exclusively on a chip?

We've got a bunch of large (1TB+) NUMA machines at work and have been getting a lot of noise in benchmarking. We've noticed that run times for our application are very consistent from one run to the ...
1
vote
0answers
27 views

USB bench marking shows faster write speeds after fragmentation? How? [duplicate]

I am currently benchmarking my 3.0 USB Flash drive both fragmented and defragmented. My initial setup consisted of Crystal Disk Mark and a flash drive with no files on it. I recorded the output ...
1
vote
1answer
40 views

MIPS as a measurement of raw integer data processing

I'm looking for a way to contextualize generational differences in computing performance. Is this a correct application of the MIPS measurement? MOS 6502 - 0.500 MIPS at 1 MHz. As an 8-bit CPU it ...
0
votes
0answers
68 views

Disable all disk cache features in Windows 7

I am doing benchmarking of several algorithms involving read/write to disk. As Windows provides some cache features, sometimes I get results like these : first run of the algorithm : 200 seconds ...
2
votes
2answers
115 views

SD card speed differences

I'm trying to benchmark a micro SD card, and in the process it seems that my laptop's card reader is to blame, but I would like to make more experiments to be sure of it. I have a supposedly Class 10 ...
0
votes
0answers
62 views

Is there any HPL benchmark analogs for CPU/GPU clusters?

I'm building little CPU/GPU cluster for my home needs. Im using this cluster for CPU and CUDA computing. I have 3 PCs and each of it has 1 or 2 videocards and each of it has different CPUs. I need to ...
0
votes
0answers
54 views

Benchmarking RAID array with gnome-disk-utility

I want to run a quick benchmark to see if there is any performance advantage of my RAID 1 array. Array is the system disk, and while I can run benchmarks on each single disk, I can't find how to do it ...
0
votes
0answers
205 views

Benchmarking: VM vs. Bare-Metal

I have setup a test machine running Windows Server 2012 with Hyper-V role installed. There is one Windows Server 2012 VM running on top of that. This VM is the same server image that is also running ...
0
votes
0answers
45 views

how does RAM affect on user+sys time of time command linux

I'm testing two machines with time command. Technically machines are identical, CPUs are the same, memories -too, conditions - too, no current processes except for the benchmarking program are ...
0
votes
1answer
281 views

Clues to guess CPU performance for single-threaded tasks

Can one somehow guess how for example Intel Core i5-3320M @ 2.60GHz (dual core) and Intel Core i7-3612QM @ 2.10GHz (quad core) would compare on basic single-threaded tasks? I know this is problematic, ...
0
votes
1answer
42 views

Low benchmark= faulty or slightly faulty cpu?

If a phone/computer scores slightly lower on a benchmark than the rest...not drastically but significant enough to be noticed could the cpu be damaged? What I am asking is that if a cpu is damaged ...
2
votes
2answers
1k views

Test disk write speed on existing partition

I want to benchmark write speeds on a disk in an existing server setup. I suspect there is a problem with the write perf of the controller. Benchmarks I have tried (SiSoft Sandra, HDTune) report that ...
1
vote
1answer
174 views

Why the here-strings in bash are slower than piping the input to a command?

I compared the execution time for unix here-strings and pipe data input to bc: pipe time for i in {1..1000} do echo "sqrt(5.09)" | bc -q > /dev/null done real 0m3.584s user ...
0
votes
1answer
57 views

How can I decide real vs virtual cores if i need intensive calculus?

Assume that I have a computer called A with a processor that has two cores and has hyperthreading, i.e it has 2 cores with 4 threads (I understand that this can supply to 4 processes simultaneously), ...
0
votes
1answer
189 views

Multi-threaded execution of simple perl/python script

Some years ago a friend created a 'benchmark' (Note: Not a benchmark) by which wouldwhich we measure one raw aspect of computing power. Namely how fast (or indeed slowly) the computer could count to ...
0
votes
1answer
270 views

Why are some computers are slow during file copy process?

I have a modern laptop (quad-core i5 2.5GHz, 4GB RAM, ) at work. But it is very slow and unresponsive when I copy files in the background.On the other side, at home I have a simple 2-core PC (E2180 2 ...
2
votes
2answers
3k views

ZFS raidz2 performance issues read/write speeds on Freenas

I'm having some performance issues on my home backup FreeNas box using a raidz2 configuration and I am wondering what might be causing it (not enough processing power, eco drives?). It's running: ...
4
votes
2answers
642 views

Is it necessary to tweak config for a new SSD?

I've read some years-old posts that say you should tweak some options in Windows to get the best performance. But then I read that this is no longer necessary with today's SSDs. I installed a new ...
8
votes
3answers
5k views

Why the results of Truecrypt and cryptsetup (LUKS) benchmarking are so different?

I want to encrypt a part of my HDD. But before that I wanted to benchmark the different algorithm available wondering if I should choose aes-xts-256 or aes-xts-512. Note: I don't have aes hardware ...
2
votes
0answers
103 views

How to benchmark hard disk? [duplicate]

I am trying to benchmark my hard disk and find the throughput in Mb/s and latency in milliseconds. This is my code: public class OneMB implements Timer { public static void main(String a[]) throws ...
5
votes
3answers
3k views

Is there a list of graphics cards ordered by relative performance?

I'm struggling to make sense of graphics card manufacturers' cryptic names and codes for their products. For example, some cards with a higher number or code in the name are actually less powerful ...
4
votes
2answers
535 views

What does the file /proc/cpuinfo tell me about the hardware?

I rent a server which should have "2 Cores x 2,2 GHz". When in run the command cat /proc/cpuinfo I get the following result: processor : 0 vendor_id : AuthenticAMD cpu family : 15 model : ...
0
votes
1answer
147 views

Is bigger capacity ram faster then smaller capacity ram for same clock and CL?

I know that bigger capacity hard-drives with the same RPM are faster then smaller capacity hard-drives. I was wondering if the same is true for ram. Given two ram clocked at 1600mhz and with identical ...
0
votes
1answer
68 views

Find out information about installed hard- and software using the terminal without admin rights

I have access to a remote server, to which I login via ssh. I don't have admin rights, but I like to find out as much as possible about the machine, among other things to see If I get what I pay for. ...
0
votes
0answers
244 views

Why is the clock speed readout greater than the maximum?

(click for full-size image) What is this madness? (I'm aware that the top number refers to the non-Turbo Boosted clock speed, but what of the others?)
2
votes
2answers
1k views

Poor performance of single processor 32bit Windows XP xompared SMP in VBA+Excel

Welcome! On many computers I experienced poor performance of 32 bit guests running on 64 bit Linux host (I used only the Debian family). At last I managed to collect benchmark data. I made the ...
1
vote
1answer
303 views

Intel's i7 2700k vs 3770k on Ram Frequency

The major difference (IMO) between the two is the max RAM frequency. 2700K = 1333 MHz 3770k = 1600 MHz Will this make noticeable difference and if yes in what type of applications will I ...
4
votes
2answers
172 views

Do uninterruptible power supply increase the life expentency of hardware?

Do UPS increase the performance or life expectancy of the hardware connected to it? What if the UPS has a built in line conditioner?
3
votes
1answer
1k views

How do I tell which desktop CPU is best for virtualization with 6-8 virtual machines?

I am looking to run between 6 and 8 virtual machines, each running Windows XP. Each virtual machine would run Magic Online (MTGO) and a few scripts for data sharing. The host itself would run nothing ...
2
votes
1answer
58 views

Searchable disk benchmarks

I'm trying to find a web site that has a searchable database of hard drive, SSD, and flash drive benchmarks. Ideally I could search by model number and get the following information: Seq read max, ...
1
vote
2answers
1k views

Is sleep mode harmful for a computer?

For the last 1.5 years I've tended to put my laptop in sleep mode rather than turn it off. Recently I started to feel it's not as fast as it was when I bought it, even if I restore a fresh Windows 7 ...
4
votes
2answers
151 views

Quality control for a large number of promotional USB flash drives

My company is ordering a large number of USB flash drives for promotional purposes as well as retail sales. We will be getting a sample of them shortly to test. The previous lot that we had failed ...
34
votes
8answers
38k views

How can I produce high CPU load on a Linux server?

I'm currently in the process of debugging a Cacti installation and want to create CPU load to debug my CPU utilization graphs. I tried to simply run cat /dev/zero > /dev/null, which works great, ...
2
votes
1answer
242 views

Comparing SSD benchmarks

here's the problem... I am looking at some SSDs benchmarks, but when comparing I didn't understand some benchmarks on tom's hardware and on passmark. Why is the Vertex 4 behind the other two drives ...
0
votes
1answer
675 views

Looking for a free - no install tool to test cpu speed (including multiprocessors configurations)

I'm looking for a tool which can execute a number of different CPU speed tests. I just want to compare how much faster my computer's CPU is from another. I also want to test "just one core" because ...
1
vote
1answer
304 views

If a CPU overheats, is it possible that its performance will subsequently diminish as a result?

I recently built a system with an Intel I5 2500K processor. I made the goofy mistake of not perfectly securing the stock heat sink onto the processor. One of the clips wasn't quite all the way in, so ...
1
vote
1answer
347 views

Feasibility of putting two Intel 520s in RAID0 on a 3 year old board

I have a 3+ year old i7 rig (using an old ASUS P6T Deluxe) which currently has two SSD's in RAID 0 using the on-board Intel Matrix Storage RAID Controller (The predecessor to Intel RST?) - The SSD's ...
10
votes
2answers
11k views

How come my Intel 520 180GB SSD performs extremely poorly?

I recently installed a new Intel 520 series 180GB SSD in my brand new MacBook Pro. The system is as follows: Model: MacBook Pro 15-inch, Late 2011 (MacBookPro8,2) Processor: 2.4 GHz Intel Core i7 ...
1
vote
0answers
169 views

Updating Apache on OS X

When I run ApacheBench (which is included in Apache) on OS X Lion I get a known error. This is ApacheBench, Version 2.3 <$Revision: 655654 $> Copyright 1996 Adam Twiss, Zeus Technology Ltd, ...
1
vote
3answers
2k views

ssd running slow

I have a Kingston SSDNOW on sata 2. Doing a benchmark i get these results: As can be seen, the sequential write performance is terrible. Below even 100 MB/s. Also why do the tests labelled 4k show ...
2
votes
1answer
176 views

How are benchmarks for multiple cores calculated? [closed]

I found this site to compare CPU's. http://www.cpubenchmark.net/high_end_cpus.html What wasn't clear is how the benchmark for multiple core processors is calculated. If one CPU has 4 cores (such as ...
1
vote
1answer
479 views

Software to detect hardware bottlenecks?

Is there software available that I can run on my system to detect possible hardware bottlenecks (CPU, RAM, Graphics, …)? p/s : I'm running Windows 7
1
vote
2answers
254 views

Is it possible to assign specific CPU/IO/RAM of hosted machine to virtual machine?

We are trying to do some time benchmarks in the Virtual Machine (VPC) e.g. how long it takes to Windows gets idle after boot. So far we have not figured out a way how to do the benchmarks accurately ...
3
votes
1answer
218 views

How/where can I compare different vendor boards of a particular GPU?

I'm looking at getting a new graphics card. Whilst I've settled on the GTX 580, I have no idea which vendor (board) I should go for. This is something that has always bugged me - it's relatively easy ...
1
vote
0answers
29 views

Finding hardware bottlenecks [duplicate]

Possible Duplicate: How can I find out what's the bottleneck slowing down a particular process / the entire system? When my computer slows down by running a massive program like Visual ...