SPEC CPU2006 v1.2
SPEC CPU2006v1.2 measures compute intensive performance across the system using realistic benchmarks to rate real performance.
In our testing with SPEC CPU2006 we use the following basic commands to run these tests:
" Runspec --tune=base --config=tweaktown.cfg ," then " int " or " fp ."
To do multi-threaded, we add in " --rate=4 ."
When SPEC CPU first came out, these tests could take up to a week to run, but as computers become faster, our tests now take up to four days for a full run, and even less on some systems.
The user can do many things to effect the results of CPU2006 runs, such as compiler optimizations, add-ons like SmartHeap, and different commands used to start the tests.
Just like in UnixBench, we had not started using CPU2006 on the earlier platforms that we did reviews on, so we have no data to compare to.
This benchmark has many different commands to use depending on what the user is looking for. For our tests, we used basic commands that run a full test with a base tune.
You can see here the SPEC scores after full runs for Integer (int) and Floating Point (fp) tests.
Single-core runs show how fast (speed) a CPU can perform a given task. In the multi-core runs, we set SPEC CPU2006v1.2 to use all threads to measure the throughput of the system.
The additional cores/threads of this system have a huge impact on performance in these tests, and really shows the amount of horsepower that a dual-socket system has over a single-socket board.
Single-threaded results are still very important, but when you need many single-threaded apps to run, moving to a CPU with more cores is the way to go.
In CPU2006, we start to crunch the Atom C2550 hard. The system actually performed very well for a CPU in this class. Heat was also not much of an issue during these tests, and that shows that this platform can handle stress very well. When testing the C2550D4I, we did see temperatures raise a fair amount, but this had no real impact on the system.
By looking at the results of single-threaded integer runs, we can get an idea of speed at which the Atom C2550 can crunch through the different integer tests. Not all CPUs are equal here, and ones that have a higher speed will perform these tests faster. Naturally, using an overclocked system, or CPUs with a higher stock speed, will generate higher results.
Now we run the test using all four cores on the Atom C2550 to measure the throughput of the system. In this test, more cores/threads will have a greater effect on the outcome.
Just like the integer tests, we now run the floating-point tests in single-threaded (speed) mode.
Here we see the results of the multi-core floating-point run that uses all four cores on the Atom C2550. Like the multi-threaded integer test, more cores/threads will have a greater impact on the test.
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