32 or 64??

anubis darthanubis at gmail.com
Sun Jan 31 21:07:11 UTC 2010

Hash: SHA1

Ubuntu: 32-bit v. 64-bit Performance


Ubuntu 32-bit, 32-bit PAE, 64-bit Kernel Benchmarks


Benchmarking On Ubuntu Just Became Easier


sudo apt-get install phoronix-test-suite

Only a very small drop in performance can be found with the PAE kernel
in the PostMark disk test, but the 64-bit kernel was immensely faster.

In the fourteen tests for this article we did not find using Ubuntu's
32-bit PAE kernel to have a dramatic performance impact whether it be
positive or negative. Granted, we were using just 4GB of system memory
that is common to many desktops, but if using 8GB, 16GB, or even a
greater memory capacity the performance penalties are perhaps higher. By
far though exhibiting the best performance was the Ubuntu 64-bit kernel
that often ended up being leaps and bounds better than the 32-bit
kernel. Unless you have technical or business reasons for not migrating
to 64-bit Linux with compatible hardware, there is no reason to stick
around with a 32-bit kernel and worrying about physical address
extension. If you want to run your own kernel benchmarks, give the
Phoronix Test Suite a try that offers more than 120 test profiles and 60
test suites.

Enough with the anecdotes, the numbers don't lie. Test for yourself as
the suite is in the repos.

Can we be done with this thread, I can't killfile this noise because
this is not Usenet. unless someone can share how I can filter a thread
in Gmail to NEVER appear again?
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