Hot answers tagged

97

Try stress It's pretty much an equivalent of the Windows consume.exe: oliver$ ./stress --cpu 3 stress: info: [18472] dispatching hogs: 3 cpu, 0 io, 0 vm, 0 hdd


52

Buy a computer for the upcoming years, not for today. Let's assume you are still at an university and that you probably want to get a computer for gaming purposes. In about a year you will graduate and have a very mobile life, but you're out of money to get a new laptop and the company laptop can't be taken home. Wouldn't you wish you had bought a laptop? ...


45

No need to install any extra package, your good old shell is able to do it alone. This one-liner will load your four cores at 100%: for i in 1 2 3 4; do while : ; do : ; done & done How it works is quite simple, it starts four endless loops. Each of them is repeating the null instruction (:). Each loop is able to load a CPU core at 100%. If you ...


32

NTFS has this thing called a Master File Table. It sounds really cool when you read about it. You can see that ext3 performs alright up to about 95% disk use, while the existence of the MFT means that NTFS doesn't really want you to use more than 90% of your disk. But I'll assume that's not your problem, and that your problem is with the many operations on ...


17

XBench is the de facto standard for Mac benchmarking - and it covers not just the hard disk, but almost every measurement metric on a computer.


15

Compile the Linux kernel or GCC from source with: make -j N Where N is the number or cores + 1. You can do it in a loop in a bash script (make clean; make -j N) if you want a continuous load.


14

I made a simple python script which does the same. You can control the number of cpu cores you want to load. The good thing about this is that it won't consume any other resource besides the cpu. (I think mark johnson's idea would consume a lot of I/O resources, which is undesired here.) from multiprocessing import Pool def f(x): # Put any cpu (only) ...


12

There is no direct relationship between the physical size and performance. The form factor defines the size of the plastic shell. What is inside is based on the same chip manufacturing technology. Technology improvements, in the industry overall or by a specific chip manufacturer, can go into either form factor. Putting a MicroSD card in an SD adapter ...


11

The clock speed is only partially in charge of 'how much stuff gets done' (a.k.a. 'work'). To compare 2 CPUs you should check out CPUbenchmark.net and find both your old and your new CPU and compare the results. For example, a P4 with 3 GHz clock speed achieves a benchmark result of 491 (see here). the Core 2 Duo with 1.8 GHz clock speed achieves a result ...


10

I always use HDTune. Simple, 'fast' and you can compare test results on their website.


10

The drive you are testing (Intel 520) is based on a Sandforce controller, these controllers rely heavily on data compression to achieve the stated speeds. As a result you will happily saturate a SATA-III link when doing sequential tests on compressible data, however these speeds can drop by up to an order of magnitude (depending on the exact drive) when ...


9

As it was said, ubcd4win with the integrated prime95 is a good solution. For a lighter solution you could use this linux distribution: stresslinux stresslinux is a minimal linux distribution running from a bootable cdrom, usb, vmware or via PXE (wip). stresslinux makes use of some utitlities available on the net like: stress, cpuburn, hddtemp, lm_sensors, ...


9

Take longevity into account when selecting components. If it will last 10 years, buy the best model. If 1 year, don't spend too much. Here's a rough breakdown from my PC: Chassis (11 years) Kinesis Keyboard (11 years) Audio Card (11 years) Power Supply (4 years) Motherboard (3 years) Memory (3 years) Graphics Card (3 years) Processor (2 years) Hard Disk ...


9

Yes, you are looking for this list http://www.tomshardware.com/reviews/gaming-graphics-card-review,3107.html Specifically http://www.tomshardware.com/reviews/gaming-graphics-card-review,3107-7.html There is a new version every 1-2 months


8

Before You Go Shopping: Write down on paper EVERYTHING you need and everything you want! The last thing you want is to get enticed by a seemingly great laptop, for example, only to find out that it's missing a critical feature you really needed (e.g. a DVD drive, a high-resolution monitor, low weight, etc.) Regarding the specifics: How do I find out ...


7

You could use Ultimate Boot CD. Download and burn the ISO into a CD or put the contents into a bootable thumb drive. Boot from the CD/thumb drive. From the options which has several tools, you could select mainboard tools and then StressCPU test from there to stress test your CPU. Check this, for the list of tools available in this ISO.


7

I usually take the cpuburn suite: sudo apt-get install cpuburn for i in {1..4}; do burnK7 & done Replace 4 with the number of cores / HT-threads you have or want to stress. Note: This stresses as much chip area as possible at the same time, it's programmed to generate maximum power dissipation. I had to write this post a second time, somehow my ...


6

IOMeter is great for measuring disk performance, there are several sites available that carry reference tables (I used one for VMWare based PC's, so I suggest you google for alternatives :-) ) EDIT: Found a very nice table on Tom's Hardware, I'm guessing the "workstation" profile seems to fit quite well...


6

Of course! Iometer is still considered a very respected standard benchmark tool, and it is still used in popular hardware reviews. If it provides all of the statistics you need, go for it! If you're looking for newer tools, SiSoft Sandra is very popular among the benchmarking crowd:


6

You should find this article interesting: iSCSI, AFP, SMB, and NFS performance with Mac OS X 10.5.5 clients. It shows these test results: (in seconds) iSCSI 134.267530 AFP 140.285572 SMB 159.061026 NFSv3 (w/o tuning) 477.432503 NFSv3 (w/tuning) 293.994605


6

I have made some real world, non-scientific tests of i/o speeds of iscsi and different network protocols in OS X. My setup: Early 2011 MPB runnig OS X 10.7 Lion, connected to Netgear gigabit switch Qnap TS-419P II NAS with 4 disks in RAID5, connected to Netgear gigabit switch Buffalo LinkStation Pro NAS with 1 disk, connected to Netgear gigabit switch ...


6

The quality of each program will depend on the connection of each person involved in the conversation, as well as the available hardware - not limited to, but including: Microphone (a poor quality microphone will sound even worse after being compressed and decompressed) Poor speakers Lower end sound cards / chips can reduce audio quality. If these ...


6

Keep a hierarchy of needs in mind. Do you mostly game? Then you'll want the best CPU and graphics card you can afford. Those choices will determine the range of motherboards you can afford, which will affect RAM, connector possibilities, and other things, and everything combined will determine the sort of PSU you need. Do you absolutely need a specific port ...


6

How do I find out if a given CPU and GPU will be enough? As mentioned here already, buy for the future. If you are looking at a CPU or a GPU that meets the minimum requirement (or even the recommended requirement) for the games you want, go another step up if your budget permits. You will thank yourself in the long run when you aren't building another PC in ...


6

As been pointed out already, clock rate has very little to do with how well a CPU performs. It all comes down to how many clock cycles that is necessary to execute a given instruction. This is called CPI (Cycles Per Instruction), and it's what measures a CPUs performance. So even though the Pentium 4 has a much higher clock rate it will be greatly ...


6

I assume you are most concerned about the write performance, and that this test represents sequential write performance (520MB/s claimed), not random (which would be in the 250MB/s range). Basically, SSD write performance is significantly impacted by the availability of free, programmable blocks. You are ~90% utilized, so this may explain your issues. Have ...


5

Well, your particular problem is because Subversion itself comes from the UNIX world, the Windows version therefore assumes similar performance characteristics. NTFS performance really isn't great with gazillions of small files. What you are seeing is simply an artifact of something designed for a particular operating system with performance assumptions ...


5

Memtest86 - memory test software designed to test and stress test an x86 architecture computer's random access memory (RAM) for errors.


5

You can try: PassMark PerformanceTest. It tests all aspects of your computer including CPU,Hard Drive, RAM, GPU, Network, and Disk Drive. Displays detailed results. Free trial.



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