Messages in this thread | | | Date | Fri, 10 Oct 2003 14:55:17 -0700 (PDT) | From | Judith Lebzelter <> | Subject | OSDL Iozone results for latest kernels |
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Hello;
I am publishing Iozone results for the latest 2.6 kernels in a format meant to easily show IO differences between the kernels on several filesystems. The URL is: http://developer.osdl.org/judith/iozone_index.html
The tests are all run in the Scalable Test Platform at OSDL, and the report is updated every few hours.
Example results: These (below) show that for 128k records on ext2, test7 is consistantly better than test1, but only better than 2.4.22 for Reader and Fread. (Look at the Ave %.) The web based reports have links to the Iozone report data: http://www.osdl.org/archive/judith/tests/iozone/hist.2-CPU.ext2.bigrec.html
Iozone Summary: 2-CPU/ext2 Large Record Size 128k Writer report Min % Max % Ave % Kernel 0.00 0.00 0.00 linux-2.6.0-test1 -1.08 3.28 1.37 linux-2.6.0-test7 7.49 44.40 16.65 linux-2.4.22 Reader report Min % Max % Ave % Kernel 0.00 0.00 0.00 linux-2.6.0-test1 0.50 6.02 3.91 linux-2.6.0-test7 -10.51 2.69 0.20 linux-2.4.22 Random read report Min % Max % Ave % Kernel 0.00 0.00 0.00 linux-2.6.0-test1 -9.00 3.22 0.87 linux-2.6.0-test7 -0.52 128.91 12.95 linux-2.4.22 Random write report Min % Max % Ave % Kernel 0.00 0.00 0.00 linux-2.6.0-test1 -0.72 6.08 3.19 linux-2.6.0-test7 0.50 90.97 10.95 linux-2.4.22 Fwrite report Min % Max % Ave % Kernel 0.00 0.00 0.00 linux-2.6.0-test1 -0.68 9.01 3.41 linux-2.6.0-test7 5.62 37.83 13.84 linux-2.4.22 Fread report Min % Max % Ave % Kernel 0.00 0.00 0.00 linux-2.6.0-test1 0.85 6.82 5.01 linux-2.6.0-test7 -13.64 3.91 0.83 linux-2.4.22
Iozone is an IO test. It measures 'operations per second' where the 'operations' are the various types of reads and writes. These summaries report the percent difference for each kernel tested from the chosen baseline kernel(currently linux-2.6.0-test6). There is also a 'historical' link which compares only the baseline 2.6.0-test kernels.
Go to the link for the results for more kernels. I hope these are useful. Please let me know if they are, or if any changes to the reports would make them more useful.
Thanks;
Judith Lebzelter OSDL
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