Linux Desktop CPU Roundup: Cutting Edge Penguin Performance
by Kristopher Kubicki on September 19, 2004 8:00 PM EST- Posted in
- Linux
Encryption Benchmarks
Finally, our favorite part of any Linux benchmark - hashing and encryption tests. John the Ripper has multiple optimizations for Intel and AMD hardware, including hand-coded ASM functions. For the 64-bit versions of John, we compiled using the make linux-x86-64-elf target. As you can see, this produces slower binaries than the 32-bit versions of John. Oddly, the 64-bit binaries were heavily dependent on compiler flags, while the 32-bit versions showed very little difference from one compile flag to another.
Hold your mouse over for the 64-bit graph.
Hold your mouse over for the 64-bit graph.
Hold your mouse over for the 64-bit graph.
The Pentium 4 560 gets extremely penalized in the DES hashing, but excels in the Blowfish and MD5 benchmark. Both are still horrendously slow if you plan on using either algorithm to brute force anything, but if you tend to generate a lot of keys, you will notice a difference between the AMD and Intel CPUs.
Below, you can see how our processors performed in the OpenSSL "speed" benchmark.
Hold your mouse over for the 64-bit graph.
Hold your mouse over for the 64-bit graph.
OpenSSL's crypt libraries are probably heavily optimized for 64-bit operation; we see the difference in the two architectures very clearly. The RSA functionality is extremely crippled on the Pentium4 platform. Although this is an extreme example of one hardware platform dominating another, we consider this to be a relevant real world example.
An unusual problem occured while running the OpenSSL benchmark. Even though we are using Intel validated heatsink/fan combos we recieved a continuous stream of errors from the operating system regarding thermal temperatures. An example syslog can be seen below:
Message from syslogd@linux at Mon Sep 18 01:57:27 2004 ...
linux kernel: CPU#0: Temperature above threshold
This does not bode well for the processor. Our processor test bed is completely caseless, and if we have issuse with our 3.6GHz processor out of a normal case, we can't imagine what issues might exist in a full enclosure.
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Aquila76 - Monday, September 20, 2004 - link
It's happened again: the cheapest AMD64 939 processor is the better choice of the processors reviewed here for price/performance. Granted the Linux market isn't a huge chunk of the market for either company, but among those who do use Linux there is no reason to use anything but AMD.fitten - Monday, September 20, 2004 - link
It would be interesting to see these tests run on several S754 boxes as well. I know this one was entitled "cutting edge performance" but with the cost difference between the S939 solutions and the S754 solutions, many will opt (as I have) to go with the S754 parts. I run SuSE 9.1 Professional AMD64 on an Athlon 64 3000+ and have been pleased with it.Aquila76 - Monday, September 20, 2004 - link
This may be a little off-topic, but shows yet another reason California hates MS. This is what happens when you move to Windows...http://software.silicon.com/applications/0,3902465...
Love the caption: Someone forgot to reboot
fitten - Monday, September 20, 2004 - link
"Our processor test bed is completely caseless, and if we have issuse with our 3.6GHz processor out of a normal case, we can't imagine what issues might exist in a full enclosure. "Todays processors ("today" meaning back to the days of the original Pentium) typically run hotter with the case open than with it closed. With the case closed, cooler air is forced through the case and across the right places to help lower component temperatures, assuming that the fans are placed appropriately, are venting in the right direction, and cables/components are arranged to allow the air to flow properly.
Newer form factors, such as Intel's BTX, are designed in a large part to cope with cooling the thing down.
You should be running your test bed in a case with appropriate cooling.
Araemo - Monday, September 20, 2004 - link
A note about the compilation benchmark:Make and gcc themselves are not multi-threaded, but make does understand a -j option to specify the # of concurrent make jobs to run. The general rule-of-thumb I have heard, is to specify a -j equal to n+1, where n is the number of processors in the system(One compile job per processor, and one control job.) So, to test if hyperthreading lowers the compile time, specifiy `time make -j 3`.
I would personally like to see this, in addition to the single-threaded results. I read some quick-and-dirty benchmark results suggesting hyperthreading does help the compile time, but those results were published by curious people when hyperthreading was new.. I haven't seen any results on recent processors.
garfield - Monday, September 20, 2004 - link
Isn't it normal procedure for a P4 that's getting too hot that it throttles the clock speed down? Maybe that would explain the extremely bad results, though it seems a bit unrealistic that the results has been reproducible, unless each iteration of the benchmark has been run for a long time.ceefka - Monday, September 20, 2004 - link
First of all : good article. It really shows the early benefits of well written 64-bit software. The 3500+ is definately on my wishlist ;-)"This does not bode well for the processor. Our processor test bed is completely caseless, and if we have issues with our 3.6GHz processor out of a normal case, we can't imagine what issues might exist in a full enclosure."
Rather confusing this bit, Kristopher. Anyway, I read that a good case will offer convection which apparently a caseless testbed does not. How were the tempratures of the other CPU's? Were they also a tad above average or typical peak?
balzi - Monday, September 20, 2004 - link
Some thoughts --can we please have Graphs where the order of the legend is the same as the order of the bars in the bar-graph. Surely that's possible.
also, the strange "Thermal issue" error. It seems that you thought it was weird but immediately assumed that it was correct; that the Intel CPU(s) were getting too hot.
Did you verify this somehow?? It seems strange to call it "An unusual problem" and then trust that it's correct without question or explanation.
Thanks
Shinei - Monday, September 20, 2004 - link
"This does not bode well for the processor. Our processor test bed is completely caseless, and if we have issuse with our 3.6GHz processor out of a normal case, we can't imagine what issues might exist in a full enclosure."That quote made me laugh, and I'm not entirely sure why. :D
Anyway, I see that going to 64-bit is definitely worth the price of admission, considering the huge gains the processors get in the jump. One thing I had a question on, though: Why does the result from the SSL benchmark halve between 32-bit and 64-bit? Is it that the keys are longer in 64-bit?
gherald - Monday, September 20, 2004 - link
I too would prefer longer images that include both 32 and 64-bit results. Mouseover comparisons are cumbersome.Is sample.wav 800mb or 700mb? I'm guessing the 7 was probably just a typo.
Nice analysis of DDR1 vs 2.
My only gripe is I wish a full complement of "lower end" processors were included in all these benchmarks (754s, slower prescotts, and heck even northwoods)... but I guess that'd be too much work.