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Processor / memory bandwidthd? in GB/s

Terminal - Processor / memory bandwidthd? in GB/s
dd if=/dev/zero of=/dev/null bs=1M count=32768
2009-02-16 12:22:18
User: jacquesloonen
Functions: dd
38
Up
Down
Processor / memory bandwidthd? in GB/s

Read 32GB zero's and throw them away.

How fast is your system?

Show sample output | Add to favourites | Report as malicious

Alternatives

There are 4 alternatives - vote for the best!

Terminal - Alternatives

Know a better way?

If you can do better, submit your command here.

What others think

Quad Core + 6G ram,

34359738368 bytes (34 GB) copied, 3.09455 s, 11.1 GB/s

What you running?

Comment by Williebee 222 weeks and 2 days ago

BTW Nice command!

Comment by Williebee 222 weeks and 2 days ago

Intel(R) Core(TM)2 Duo CPU E8400 @ 3.00GHz

on the same hardware, a different OS...

@CentOS 5.2 x86_64 ... 37.0GB/s

@openSUSE 11 x86_64 ... 13.4GB/s

The OS, Processor and memory-speed have influence on this value... What is your fastest system???

Comment by jacquesloonen 222 weeks and 2 days ago

Very nice command!

On Ubuntu with macbook 4,1 (Intel(R) Core(TM)2 Duo CPU T8300 @ 2.40GHz) I get up to 10.6GB/s with some crap running... I'll try it later on a LFS with nothing at all.

BTW, you get a different answer each time, so run it several times to get an idea.

Comment by gniourf_gniourf 222 weeks and 2 days ago

32768+0 records in

32768+0 records out

34359738368 bytes (34 GB) copied, 25.1875 s, 1.4 GB/s

This is an Acer Aspire One Netbook running Ubuntu jaunty alpha6

processor: Intel(R) Atom(TM) CPU N270 @ 1.60GHz

Comment by dudus 218 weeks and 5 days ago

mobile@Bills-iPhone ~ $ time dd if=/dev/zero of=/dev/null bs=1M count=32768

32768+0 records in

32768+0 records out

34359738368 bytes (34 GB) copied, 285.487 s, 120 MB/s

real 4m45.681s

user 0m0.340s

sys 4m8.030s

Had to try this on my iPhone :)

Comment by my0pic 209 weeks ago

PowerEdge R900, 67 GB/sec

Comment by infinity005 208 weeks and 4 days ago

# time dd if=/dev/zero of=/dev/null bs=1M count=32768

32768+0 enregistrements lus

32768+0 enregistrements ?crits

34359738368 octets (34 GB) copi?s, 18,536 s, 1,9 GB/s

real 0m18.540s

user 0m0.016s

sys 0m18.405s

model name : AMD Athlon(tm) 5000 Dual-Core Processor

Linux version 2.6.32-3-amd64 (Debian 2.6.32-9)

Comment by crashdump 156 weeks and 2 days ago

32768+0 records in

32768+0 records out

34359738368 bytes (34 GB) copied, 24.6279 s, 1.4 GB/s

On an 8 year old Dell Dimension 8250 (desktop), with Intel Pentium 4 Processor 2.53GHz, 533MHz system bus, Dual Channel PC1066 RDRAM, and 512MB Rambus RDRAM.

Comment by quintic 142 weeks and 5 days ago
dd if=/dev/zero of=/dev/null bs=1048576 count=32768

32768+0 records in

32768+0 records out

34359738368 bytes transferred in 24.666 secs (1393000014 bytes/sec)

That's 1.3GB/s on a Droid X running Froyo. Niiice! ;]

Comment by HerbCSO 130 weeks and 5 days ago

The following was run on a Rackspace Cloud 256MB Server Instance

dd if=/dev/zero of=/dev/null bs=1M count=32768

32768+0 records in

32768+0 records out

34359738368 bytes (34 GB) copied, 6.26173 s, 5.5 GB/s

Comment by Nichlas 99 weeks and 4 days ago

# AMD Phenom II X4 955BE, 4Gb ddr3 1333

# mixed Sabayon-Gentoo, 64bits

dd if=/dev/zero of=/dev/null bs=1M count=32768

32768+0 records in

32768+0 records out

34359738368 bytes (34 GB) copied, 4.17995 s, 8.2 GB/s

Comment by ivanalejandro0 85 weeks ago

[edvin@vampire ~]$ dd if=/dev/zero of=/dev/null bs=1M count=32768

32768+0 records in

32768+0 records out

34359738368 bytes (34 GB) copied, 0.614522 seconds, 55.9 GB/s

[edvin@vampire ~]$ cat /proc/meminfo

MemTotal: 3788648 kB

...

[edvin@vampire ~]$ cat /proc/cpuinfo

...

model name : AMD Athlon(tm) II X2 250 Processor

...

cache size : 1024 KB

Comment by cyberpunk 42 weeks and 5 days ago

Intel(R) Core(TM)2 CPU 6600 @ 2.40GHz

OC'd to 3.1 GHz with RAM running at aprox DDR2-1066

4 year old setup still beating some of the recent CPUs :D

dd if=/dev/zero of=/dev/null bs=1M count=32768

32768+0 records in

32768+0 records out

34359738368 bytes (34 GB) copied, 2.21756 s, 15.5 GB/s

Comment by tox2ik 30 weeks and 5 days ago

Your point of view

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