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Phoronix Test Suite

OpenBenchmarking.org

The Huge Disaster Within The Linux 2.6.35 Kernel

Michael Larabel

Published on 28 May 2010
Written by Michael Larabel
Page 2 of 5 - 184 Comments

The results from the second test case we are sharing are from the 7-Zip compression benchmark, which is measuring the MIPS count and not at all dependent upon the file-system. As you can see, even in a CPU bound test, both of these systems had regressed horribly. Since February the regression introduced in the Linux 2.6.35 kernel is by far the most significant affecting compress-7zip. The MIPS count for the 64-bit Atom 330 dropped by more than 30% while the other setup dropped by nearly 40%.

With the multi-threaded PBZIP2 compression test, this Linux 2.6.35 kernel performance problem is astonishing! With the Atom Z530 setup the time needed to compress a 256MB sample file nearly doubled while the other setup increased by 50%.

In the CPU-bound FFmpeg video encoding test, the time to encode a sample NTSC video file increased by over 30%, but the other system has strangely been unaffected.

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